Assuming this is talking about isomers, molecules with the same number of elements but built differently are called isomers, therefore for molecules with 5 carbons, we can have 3 structurally different compounds possible
Compare the masses of a one-liter sample of hydrogen and a one-liter sample of helium gas, each at 25°C and 5.0 atm pressure.
I will mark brainliest if right!!
A) the helium gas has twice the mass of the hydrogen gas
B) the helium gas has four times the mass of the hydrogen gas
C) the hydrogen gas has twice the mass of the helium gas
D) the hydrogen gas has four times the mass of the helium gas
E) the mass of the hydrogen gas equals the mass of the helium gas
Now let's find masses
\(\\ \tt\hookrightarrow Mass=No\:of\:moles\times Molar\:mass\)
\(\\ \tt\hookrightarrow Mass_{(H)}=0.04(1)=0.04g\)
\(\\ \tt\hookrightarrow Mass_{(He)}=0.04(4)=0.16g\)
Ratio:-
0.16/0.04=4:1The helium gas has 4times the mass of hydrogen gas.
The mass of helium gas has twice the mass of hydrogen gas. Therefore, option (A) is correct.
What is the molar volume of the gas?The molar volume of the gas at STP and NTP is equal to 22.4 liters. The one mole of any gas occupies 22.4 L of volume. So, 22.4 liters of the gas will have a mass equal to the mass of one mole of gas.
Given, the sample of one liter of hydrogen gas (H₂) and a one-liter sample of helium gas.
As we know that the volume of one mole of gas = 22.4 L
The mass of one mole of hydrogen gas = 2g
So the 22.4 L of hydrogen gas has mass = 2 g
The mass of one liter of hydrogen gas = 2/22.4 = 0.089 g
The mass of one mole of helium gas = 4g
So the 22.4 L of hydrogen gas has mass = 4 g
The mass of the one liter of helium gas = 4/22.4 = 0.178 g
Therefore, the mass of helium gas has twice the mass of hydrogen gas.
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Question 3
What is the pH of a solution with [H 30 +) = 1 x 10 -9 M?
1.0 x 10 -5
-9.0
5.0
-5.0
9.0
Answer:
\( \huge 9\)
Explanation:
The pH of a solution can be found by using the formula
\(pH = - log [ { H_3O}^{+}]\)
From the question we have
\(pH = - log(1 \times {10}^{ - 9} ) \)
We have the final answer as
9Hope this helps you
PLEASE HURRY ASAP
The image below shows a certain type of global wind:
The Earth is shown as a circle. Equator is shown and labeled at 0 degrees. 30 degrees north and south latitudes are shown and labeled. 60 degrees north and south latitudes are shown and labeled. Curved arrows are shown pointing from the top and bottom ends of the circle towards 60 degrees north and s
What best describes these winds?
Polar easterlies caused due to sinking, cool air above the poles
Polar easterlies caused due to rising, warm air above the poles
Trade winds caused due to sinking, cool air above the equator
Trade winds caused due to rising warm air above the equator
Answer:
Polar easterlies caused due to sinking, cool air above the poles
Explanation:
I hope this helps! If it does would you please mark me brainliest?
Suppose that scientists have discovered three new elements. All three elements are in the same group on the periodic table. The other known properties of the elements are given in the table.
Element symbol Atomic mass Physical state Boiling point
Xo 47 amu gas 215∘C
A 27 amu gas 350∘C
Zw 98 amu liquid 285∘C
The best order for the elements within the group, starting from the top and working down is ______ (Choices: Xo, Zw, A / A, Xo, Zw / Xo, A, Zw) because of the trend in the _______________. (Choices: Alphabetical order, boiling point, or atomic masses)
Due to the trend of boiling points, the optimal order for elements within a group going from top to bottom is \(A, X_o, Z_w\).
From the given information we can see that the boiling points of the elements decrease from A to Xo to Zw. The highest boiling point (350°C) is of element A, followed by Xo (215°C) and Zw (285°C). We arrange the components in decreasing order of boiling points to get A, Xo and Zw.
It is important to remember that in this situation, the alphabetical order of the elements and their atomic weights are irrelevant considerations. A reasonable basis for arranging the components within the system is provided by the trend in boiling points.
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From what carboxylic acid derivative can urea most easily be prepared?carbonic acid, formyl chloride, phosgene, carbamic acid, or diurea
From Phosgene, the carboxylic acid derivative can urea most easily be prepared.
Phosgene is the organic chemical compound with the formula COCl2. It is the carboxylic acid derivative. It is a toxic, colorless gas. in low concentrations, its musty odor resembles that of freshly cut hay or grass. Phosgene is a valued and important industrial building block for the production of precursors of polyurethanes and polycarbonate plastics. Phosgene is extremely poisonous. It was a highly potent pulmonary irritant and quickly filled enemy trenches due to it being a heavy gas. It is a colorless gas with a suffocating odor like musty hay. Exposure to phosgene may cause irritation to the eyes, dry burning throat, vomiting, cough, foamy sputum, breathing difficulty, and chest pain.
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Oxygen gas is collected at a pressure of 102 kPa in a container which has a volume
of 8.0 L. What temperature must be maintained on 0.487 moles of this gas in order
to maintain this pressure? 101.3 kPa is 1 atm. Express the temperature in degrees
C. Answer to 1 decimal.
Answer:
T =201.4k
Explanation:
pressure = 102000pa= 1.007atm
v = 8L
n = 0.487mole
R = 0.08206Latm.mol-¹k-¹
T = ?
using ideal gas equationpv=nRT1.007 x 8=0.487 x 0.08206 x T 8.056 = 0.040 x TT = 8.056/0.040T = 201.4KWhich statement best explains why gases are poor conductors of thermal energy?
Answer:
Thermal Insulators
That's because air, like other gases, is a poor conductor of thermal energy. The particles of gases are relatively far apart, so they don't bump into each other or into other things as often as the more closely spaced particles of liquids or solids
Explanation:
Suppose an element has two naturally occurring isotopes
42
X
20
44
X
20
with atomic masses 42.00 amu and 45.00 amu, respectively. Determine the percent abundance of the
45
X
20
isotope given an average atomic mass of 43.22 amu.
Answer:
Chlorine
Chlorine has two naturally occurring isotopes. In a sample of chlorine, 75.77% of the atoms are Cl-35, with a mass of 34.97amu.
Explanation:
hope it helps thanks❤
Chlorine has two naturally occurring isotopes. In a sample of chlorine, 75.77% of the atoms are Cl-35, with a mass of 34.97amu.
How do you calculate the atomic mass in percentage by isotopes?
List the known and unknown values and edit the problem. Convert each percentage value into a decimal by dividing it by 100. Multiply this number by the atomic mass of that spot. Mix together each isotope to find the median atomic mass.
How do you get the maximum amount of two isotopes?To calculate the maximum percentage of each isotope in a sample of something, chemists usually divide the atomic number of a particular isotope by the total number of atoms of all that isotope and multiply the result by 100.
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other m Ammonium nitrate decomposes to nitrogen(1) oxide and water. 9. Some oxides of nitrogen are atmospheric pollutants. and oxygen. Revision Exercise When compound X is heated, a red-brown gas is evolved and a yellow residue is left on cooling. Name: (i) The red-brown gas. (ii) The ions present in the residue. (ui) Compound X.
We can determine the following based on the provided information:
Metal nitrate A is a compound that, when heated, transforms into colourless gas, brown gas B, and a metal oxide with a yellowish brown hue. B. C: Colourless petrol C. B: Brown petrol C. D: Compound D, a yellow precipitate produced by the reaction of potassium iodide with an aqueous solution of compound A.
We may deduce that A is probably lead nitrate (Pb(NO3)2) because lead is frequently used in soldering alloys and the metal contained in A is utilised in an alloy for soldering purposes.
Identifications:
Lead nitrate, or Pb(NO3)2,
N2O: Nitrogen dioxide
B: Carbon (CO)
D: PbI2, or lead iodide.
Thus, this can be concluded regarding the given scenario.
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Your question seems incomplete, the probable complete question is:
A metal nitrate A on heating gives a yellowish brown coloured metal oxide along with brown gas B and a colourless gas C. An aqueous solution of A on reaction with potassium iodide forms a yellow precipitate of compound D. Identify A, B, C and D. Also, identify the types of reactions taking place. Metal present in A is used in an alloy which is used for soldering purposes.
The typical dosage of statin drugs for the treatment of high cholesterol is 10 mg. Assuming a total blood volume of 4.5 L, calculate the concentration of drug in the blood in units of % (w/v)
Answer:
1.904 ppm
Explanation:
Concentration of drug in units of ppm = mass of solute / (mass of solution ) × 1000000
mass of blood = density of blood × volume = 1.05 g / ml × 5000 ml = 5250 g
mass of solution = mass of blood + mass of solute ( statin) = 5250 + 0.01 g = 5250.01 g
Concentration of drug in units of ppm = (0.01 g / 5250.01 g) × 1000000 = 1.904 ppm
I hope this helps!!
Which statement best explains the differences in diamond and graphite? *
1 point
Both substances are made of the same atoms, but the atoms in diamond are harder than the atoms in graphite.
Both substances are made of the same atoms, but the atoms in diamond are clear and the atoms in graphite are gray.
Both substances are made of the same atoms, but diamonds are bigger than graphite.
Both substances are made of the same atoms, but the atom arrangement forms different structures.
Answer:
Carbon alone forms the familiar substances graphite and diamond. Both graphite and diamond are made only of carbon atoms. Graphite is very soft and slippery. Diamond is the hardest substance known to man. If both are made only of carbon what gives them different properties?
The answer lies in the way the carbon atoms form bonds with each other.
Explanation:
The acetoacetic ester synthesis is a method for preparing methyl ketones from alkyl halides.
a. True
b. False
How many potassium (K) atoms are contained in 896.0 g of potassium (K)?
O 1.33 x 1025 K atoms
O 1.33 x 1024 K atoms
O 4.25 x 1021 K atoms
O 4.27 x 1022 K atoms
Answer:
Avogadro's number: 6.02 x 10. 23. Molar Mass: the mass of one mole of an element. CONVERSION FACTORS: 1 mole = 6.02 x 10. 23 atoms 1 mole = atomic mass (g).
Explanation:
one member of each of the following sets of compounds is not isoelectronic with the others. which one in each set is the odd one out? a) [no2] , co2, [no2]-, [n3]-; b) [cn]-, n2, co, [no] , [o2]2-; c) [sif6]2-, [pf6]-, [alf6]3-, [brf6]-.
The process of gas effusion involves a hole, where the gas escapes. Lower molecular mass gases emit more quickly than greater molecular mass gases is( n2 and co )
The rate law demonstrates how the rate of a chemical reaction is influenced by the reactant concentration. The mathematical explanation provided by the Rate laws demonstrates how variations in a substance's amount can alter the rate of a chemical reaction.
The molecular mass is connected to the relative rates of effusion.
a) M(N₂)/M(O₂) = 28/32 = 0,875
b) M(N₂O)/M(NO₂) = 44/46 = 0,956
c) M(CO)/M(CO₂) = 28/44 = 0,636
d) M(NO₂)/M(N₂O₂) = 44/58= 0,758
e) M(CO)/M(N₂) = 28/28 = 1, CO and N₂ The equation for the elementary step is if the reaction takes place in the single elementary step, which is the three-body molecular collision. have inexact molecular masses and will effuse at nearly identical rates.
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balancing equation plsss help
Answer:
The formula is : C3H8 + 5O2 → 3CO2 + 4H2O.
Explanation:
good luck
When adding a buffering solution made of a weak acid and a conjugate base, if the weak acid adds H+ and the conjugate base accepts H+, why don't they just neutralize each other?
Their ionization constants are similar when a weak acid and conjugate base buffering solution is added if the weak acid adds H+ and the conjugate base accepts H+. There will therefore be no neutralization.
An aqueous solution is a buffer solution. It also comprises of a mixture of a weak acid and its conjugate base, or the other way around. In the discipline of chemistry, this solution is quite significant. Here, you may learn more about buffer solutions. In the Bronsted-Lowry theory of acids and bases, conjugate acids and bases are included. In accordance with this hypothesis, a conjugate acid is the species that contributes a hydrogen cation or proton in a reaction.
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What is the role of calcium ions in the release of a neurotransmitter substance?
The emission of a transmitter is caused by the action of calcium ions, which also cause synaptic vesicle exocytosis, which releases the neurotransmitters inside the vesicles and starts synaptic transmission.
What functions does calcium ion serve in the body?Nearly all bodily biological processes, including heart and muscle pulses, neurotransmission of information, memories and learning baby creation, cell proliferation, and Calcium ions enter the cytoplasm of organelles through calcium channels.
Why are calcium ions necessary for the brain?Calcium plays a critical role in the brain's regulation of synaptogenesis and memory formation. This process activates certain calmodulin signal transmission pathways and involves important protein effectors such CaMKs, MAPK/ERKs, or CREB.
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Why should an experiment be replicated
an experiment should be replicated for one: it my give more reason to people who did not do it them selves two: during the experiment one variable could have been wrong like a gust of wind or a draft that's why you should conduct the experiment 3 to 4 times then get the medium or the average of your results giving you a more accurate answer.
Predict and explain the structure of the major and minor products when hydrogen bromide is added to 2-methylbut-2- ene, (Ch3)2CCHCH3
Pls help with homework!!!!
When hydrogen bromide (HBr) is added to 2-methylbut-2-ene ((CH3)2CCHCH3), an electrophilic addition reaction takes place, where the π bond of the alkene is broken, and the hydrogen and bromine atoms are added to the resulting carbocation.
The reaction proceeds through a Markovnikov addition, where the hydrogen atom attaches to the carbon atom with the greater number of hydrogen atoms.
In this case, the initial addition of HBr to 2-methylbut-2-ene leads to the formation of a primary carbocation, as the positively charged carbon atom only has one alkyl group attached to it. The primary carbocation is relatively unstable, and it can undergo a rearrangement to form a more stable secondary carbocation.
The major product that is typically obtained is the 2-bromo-2-methylbutane. The hydrogen atom from HBr adds to the carbon with three hydrogen atoms (the more substituted carbon), resulting in the formation of a secondary carbocation.
On the other hand, a minor product is also formed, which is 3-bromo-2-methylbutane. This product arises from the addition of HBr to the primary carbocation, which is less stable. Although the primary carbocation is less favored, it can still be formed and lead to the formation of the minor product.
In summary, the addition of HBr to 2-methylbut-2-ene yields two products: the major product is 2-bromo-2-methylbutane, resulting from the addition of HBr to the more stable secondary carbocation, and the minor product is 3-bromo-2-methylbutane, originating from the less stable primary carbocation.
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What are five electronics you use every day that transform energy from one form to anotherq
What are the uses of the metal Magnesium?
Answer:
use of sterile injections for clearanti bodies
Explanation:
Answer:
Hello There!!
Explanation:
They can be used in making products that make it lightweight such as in power tools and luggages.
hope this helps,have a great day!!
~Pinky~
Kayla wants to be an active listener. What can she do?
A. She can tell people what she knows about their backgrounds.
B. She can ask people about their backgrounds .
C. She can say she already knows everything about different backgrounds.
D.She can write songs about people's backgrounds .
Answer:
B. She can ask people about their backgrounds .
Explanation:
A, C, and D, aren't good answers.
(A. She can tell people what she knows about their backgrounds.) Telling is far different from listening.
(C. She can say she already knows everything about different backgrounds.) Saying you know everything about a background wouldn't be a good answer.
(D. She can write songs about people's backgrounds.) This could be an answer but I believe that B. is the answer.
Hope this helped :)
Ammonia ( NH3, MM 17.031 g/mol) and hypobromite ( OBr−) react according to the following chemical reaction. 2NH3+3OBr−⟶N2+3Br−+3H2O Suppose 0.325 g of ammonia reacts with 14.5 mL of a hypobromite solution. Calculate the concentration of the hypobromite solution.
Answer:
1.98 M
Explanation:
Step 1: Write the balanced reaction
2 NH₃ + 3 BrO⁻⟶ N₂ + 3 Br⁻ + 3 H₂O
Step 2: Calculate the moles corresponding to 0.325 g of ammonia
The molar mass of NH₃ is 17.03 g/mol.
0.325 g × (1 mol/17.03 g) = 0.0191 mol
Step 3: Calculate the reacting moles of hypobromite
The molar ratio of NH₃ to BrO⁻ is 2:3. The reacting moles of hypobromite are 3/2 × 0.0191 mol = 0.0287 mol
Step 3: Calculate the molar concentration of the hypobromite solution
M = 0.0287 mol / 0.0145 L = 1.98 M
The concentration of the hypobromite solution (BrO⁻) needed for the reaction is 1.97 M
We'll begin by calculating the number of mole in 0.325 g of NH₃. This can be obtained as follow:
Mass of NH₃ = 0.325 g
Molar mass of NH₃ = 17.031 g/mol
Mole of NH₃ =?Mole = mass / molar mass
Mole of NH₃ = 0.325 / 17.031
Mole of NH₃ = 0.01908 moleNext, we shall determine the number of mole of BrO⁻ needed to react with 0.01908 mole of NH₃. This can be obtained as follow:
2NH₃ + 3BrO⁻ —> N₂ + 3Br⁻ + 3H₂O
From the balanced equation above,
2 moles of NH₃ reacted with 3 moles of BrO⁻.
Therefore,
0.01908 mole of NH₃ will react with = \(\frac{0.01908 * 3 }{2}\\\\\) = 0.02862 mole of BrO⁻.
Finally, we shall determine the concentration of the BrO⁻ solution.
Mole of BrO⁻ = 0.02862 mole
Volume of BrO⁻ solution = 14.5 mL = 14.5 / 1000 = 0.0145 L
Concentration of BrO⁻ =?Concentration = mole / Volume
Concentration of BrO⁻ = 0.02862 / 0.0145
Concentration of BrO⁻ = 1.97 MTherefore, the concentration of the hypobromite solution (BrO⁻) is 1.97 M
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Based on a Kc value of 0.250 and the given data table, what are the equilibrium concentrations of XY, X, and Y , respectively?
From the solution that we have in the question;
The concentration of X and Y is 0.28 MThe concentration of XY is 0.32 MWhat is the equilibrium constant?The equilibrium constant, denoted as K, is a value that quantitatively represents the ratio of the concentrations of products to reactants at equilibrium in a chemical reaction.
It is a fundamental concept in chemical equilibrium.
The value of the equilibrium constant provides valuable information about the position of equilibrium and the relative concentrations of species involved in a chemical reaction.
Kc = [X] [Y]/[XY]
\(0.25 = (0.1 + x)^2/(0.5 - x)\)
\(0.25(0.5 - x) = (0.1 + x)^2\)
\(0.125 - 0.25x =0.01 + 0.2x + x^2\\ x^2 + 0.45x - 0.115 = 0\)
x = 0.18 M
The equilibrium amount of X and Y= 0.28 M and the equilibrium concentration of XY = 0.32 M
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Based on the answer to the question that we have;
A 0.28 M concentration of X and Y exists at equilibriumXY's concentration at equilibrium is 0.32 M.The equilibrium constantThe ratio of the product to reactant concentrations in a chemical reaction at equilibrium is represented quantitatively by the equilibrium constant, abbreviated as K.
It is a cornerstone of the theory of chemical equilibrium.
A chemical reaction's equilibrium position and the relative concentrations of the species involved can both be learned from the equilibrium constant's value.
Kc = [X][Y]/[XY]
\(0.25 = (0.1 + x)^2/(0.5 - x)\\0.25(0.5 - x) = (0.1 +x)^2\\0.125 - 0.25x = 0.01 +0.2x +x^2\\= 0.18 M\)
The equilibrium concentration of;
XY =0.5 - 0.18
=0.32 M
Then the equilibrium amount of
X and Y is
0.1 + 0.18= 0.28 M.
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Any tips to learn the periodic table? Also what should I study (groups, numbers…)?
The number of moles of molecules in a 12.0-gram sample of Cl2 is equal too?
Answer:
0.3529moles
Explanation:
no of moles =mass ÷molar mass
molar mass =17+17
=34
12÷34
=0.3529moles
According to the mole concept, the number of moles of molecules in a 12.0-gram sample of Cl₂ is equal to 0.169 moles.
What is a mole?
Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.Number of moles is mass/molar mass= 12/70.90=0.169 moles.
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1. Write the IUPAC names for the following 1.1 1.2 N 1.3 O NO2 x Y ·0 OH 5
1. The IUPAC name of N is nitrogen.
2. Nitrogen dioxide
3.The IUPAC name of O is oxygen
4.The IUPAC name of OH is hydroxyl.
The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.
IUPAC names for the given compounds are:1.1. N: Nitrogen
The IUPAC name of N is nitrogen.
It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide
Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.
The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen
Explanation: The IUPAC name of O is oxygen.
It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.
X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.
Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.
It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.
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Note: The complete question is given below
Provide the IUPAC names for the following compounds:
\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)
C6H5CH(CH3)2
H2NCH2CH2CH2CH2CH2NH2
CH3CH2CH2CH2CH2OH
CH3CH2CH2CHOHCH3
What is the molar mass of Fe2O3
Answer: The molar mass of Fe2O3 (iron (III) oxide) is 159.69 g/mol
Explanation:
what is the volume (in L) in a cylinder filled with 23.0 g of N2 gas at a temperature of 65 C and a pressure of 2.37 atm?
The volume of the cylinder filled with 23.0 g of N₂ gas at a temperature of 65 °C and a pressure of 2.37 atm is 9.6 L
Given that,
Mass of the nitrogen gas in the cylinder (m) = 23 g
Temperature (T) = 65 ℃ = 65 + 273 = 338 K
Pressure (P) = 2.37 atm
R (gas constant) = 0.082057338 L.atm.K⁻¹.mol⁻¹
In Ideal gas law or general gas equation,
PV = nRT
Number of moles in nitrogen (n) = Given mass (m) of nitrogen/ Molar mass of nitrogen
Given mass (m) = 23 g
Molar mass of Nitrogen = 28 g/mol
Number of moles of nitrogen (n) = 23 / 28 = 0.82 moles of nitrogen
PV = nRT
2.37 * V = 0.82 * 0.0821 * 338
2.37 * V = 22.75
V = 22.75 / 2.37
V = 9.6 L
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Am nevoie rapid de aceste exercitii
Answer:
I will find the answer for you
Explanation:
Just a minute