Answers
Answer:
To find the mass of 3.4 x 10^23 molecules of H2O, we need to use the molar mass of water to convert the number of molecules into grams.
The molar mass of water (H2O) is:
2(1.008 g/mol) + 1(15.999 g/mol) = 18.015 g/mol
This means that one mole of water has a mass of 18.015 grams.
To find the mass of 3.4 x 10^23 molecules of water, we can use the following steps:
Determine the number of moles of water in 3.4 x 10^23 molecules:
n = number of molecules / Avogadro's number
n = (3.4 x 10^23) / 6.022 x 10^23 molecules/mol
n = 0.565 mol
Convert the number of moles to grams using the molar mass of water:
mass = number of moles x molar mass
mass = 0.565 mol x 18.015 g/mol
mass = 10.17 g
Therefore, the mass of 3.4 x 10^23 molecules of H2O is approximately 10.17 grams.
Related Questions
Write a short story in about 150 to 200 words based on the image given below
Answers
so the dude on the throne, a monarch, most likely the king, has a diamond or some other precious object in his hand. meanwhile, there’s a dude sitting on the floor, he looks unhappy, distressed, and maybe a little surprised. so what do you think happened to get to this point? what or who gave the king the diamond? why is the dude on the floor upset? then what’s going to happen? what’s the upset dude gonna
do? what’s the king gonna do? think of answers to the questions and it should start to form
URGENT
A chemical equilibrium between gaseous reactants and products is shown.
N2(g) + 3H2(g) ⇌ 2NH3(g)
How will the reaction be affected if the pressure on the system is increased?
It will shift toward the reactant side as there is lower pressure on the reactant side.
It will shift toward the product side as there is higher pressure on the product side.
It will shift toward the reactant side as there are a greater number of moles of gas on the reactant side.
It will shift toward the product side as there are a fewer number of moles of gas on the product side.
Answers
Answer:
Explanation:
Discussion
When Pressure increases equilibrium shifts to the side with the smallest number of moles. But which side is that?
N2(g) + 3H2(g) ⇌ 2NH3(g)
The left side has 1 mol of nitrogen (N2) and 3 moles of Hydrogen = 4 mols
on the left side.
The right side has 2 mols of NH3 = 2 mols on the right.
Conclusion: You tell the number of mols by the Balance numbers to the left of each chemical in an equation.
Since the left side N2 + 3H2 = 4 mols, the equilibrium does NOT shift left.
2NH3 is only two mols.
The equilibrium shifts Right
Answer
D
Stamples of heterogeneous equilibria. FeO(s) + CO(g) = Fe(s) + CO₂(g) II. H₂(g) L₂(g) = 2HI(g) III. CO₂(g) + C(s) = 2CO(g) IV. N₂(g) 3H₂(g) + 2NH3(g) Identify I.
Answers
An example of heterogeneous equilibrium is:
I. FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g)What is heterogeneous equilibrium?Heterogeneous equilibrium refers to an equilibrium state in a chemical reaction where the reactants and products exist in different physical states or phases. It occurs when substances in different phases, such as solids, liquids, and gases, are involved in a chemical reaction.
Considering the given equations:
The equation I: FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g) represents a heterogeneous equilibrium.
This is because the reactants and products involve different phases (solid and gas). FeO is a solid (s), CO is a gas (g), Fe is a solid (s), and CO₂ is a gas (g). The reaction involves the conversion of a solid and a gas to another solid and a gas, and the equilibrium is established between these different phases.
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Which conditions produce the largest ocean waves?
Question 3 options:
strong winds that blow for a long time over a great distance
weak winds that blow for short periods of time with a short fetch
strong winds that blow for short periods of time with a short fetch
weak winds that blow for long periods of time with a long fetch
Answers
Answer:
Strong winds that blow for a long time over a great distance.
Explanation:
Generally, the biggest and most powerful wind-generated waves are produced by strong storms that blow for a sustained period over a large area. Huge and big waves, or swells, can travel over long distances. The size of the wave depends on wind speed, wind duration, and the area over which the wind is blowing. If The speed of the wind is more, it stays for along time and it covers a larger distance then the waves produced will be very powerful and large.
The answer for this
Answers
Molar mass of a compound is 90.07 g/mol. Determine its molecular formula if its empirical
formula is CH20
Answers
\(\qquad\) ☀️\(\pink{\bf{ {Answer = \: \: C_3H_6O_3 }}} \)
For this question –
Molar formula will be =\(\bf {( CH_2O)}_n \)Now, let's find out value of n. Where–
\(\qquad\) \(\pink{\twoheadrightarrow\bf n = \dfrac{ Molar \:Mass }{Empirical \:Mass }} \)
Empirical Mass of \(\bf CH_2O \)–
\(\qquad\) \(\twoheadrightarrow\sf 12 + 1×2 + 16\)
\(\qquad\) \(\twoheadrightarrow\sf 30 \)
Now, we are given, mass of compound is 90.07 g/mol.
\(\qquad\) \(\twoheadrightarrow\bf n = \dfrac{ Molar\: Mass }{Empirical\: Mass } \)
\(\qquad\) \(\twoheadrightarrow\sf n = \dfrac{90.07}{30}\)
\(\qquad\) \(\twoheadrightarrow\sf n = \cancel{ \dfrac{90.07}{30}}\)
\(\qquad\) \(\twoheadrightarrow\sf n = 3.0023\)
\(\qquad\) \(\pink{\twoheadrightarrow\bf n = 3 }\)
Molar formula will be –
\(\qquad\) \(\twoheadrightarrow\sf {( CH_2O)}_n \)
\(\qquad\) \(\twoheadrightarrow\sf {( CH_2O)}_3\)
\(\qquad\) \(\pink{\twoheadrightarrow\sf C_3H_6O_3}\)
Henceforth, Molar formula will be \( \bf C_3H_6O_3\)The molecular formula of a compound whose empirical formula is CH20, is C3H6O3.
HOW TO CALCULATE MOLECULAR FORMULA?The molecular formula of a compound can be calculated from the empirical formula as follows:
Empirical formula = CH2O.
(CH2O)n = 90.07g/mol
(12 + 2 + 16)n = 90.07
30n = 90.07
n = 3.00
If n = 3, the molecular formula of the compound will be (CH2O)3 = C3H6O3.
Therefore, molecular formula of a compound whose empirical formula is CH20, is C3H6O3.
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How long did it take a bike to travel 20 miles at 12 mph
Answers
Answer: 4 miles
Explanation:
Riding the bike 12 mph (miles per hour) for one hour, we would ride the bike 12 miles. Since 20 minutes is 1/3 of a hour, divide 12 by 3 to find out how far the biker traveled in 1/3 of the time: 4 miles Hope this helps
Hello!
\(\large\boxed{\frac{5}{3}\text{ hours} \text{ or }100 \text{ min}}\)
Use the equation d = s · t where:
s = speed
t = time
d = distance
Plug in the given distance and speed:
20 = 12 ·t
Divide both side by 12 to isolate for t:
20/12 = t
Simplify:
5 / 3 = t
Therefore, it took 5/3 hours to bike. We can convert this to minutes if necessary:
5/3 · 60 min (in one hour) = (60 · 5) / 3 = 100 min.
Club soda is an aqueous solution of carbon dioxide. A sample of club soda is titrated with 0.04202M NaOH(aq) according to the reaction equation below:
CO2(aq)+2NaOH(aq)→Na2CO3(aq)
If it takes 32.14 mL of 0.04202M NaOH(aq) to react with a 25.00 mL sample of club soda, what is the concentration of CO2 in club soda (in g/L )?
Answers
The concentration of CO2 in club soda is approximately 1.1964 g/L.
To find the concentration of CO2 in club soda, we need to use the stoichiometry of the reaction and the volume and concentration of the NaOH solution used.
The balanced equation for the reaction is:
CO2(aq) + 2NaOH(aq) → Na2CO3(aq)
From the stoichiometry of the equation, we can see that 1 mole of CO2 reacts with 2 moles of NaOH. Therefore, the moles of CO2 can be calculated using the volume and concentration of NaOH solution used.
Given that 32.14 mL of 0.04202 M NaOH solution was used, we can calculate the moles of NaOH:
moles of NaOH = volume (L) × concentration (M)
moles of NaOH = 32.14 mL × 0.04202 mol/L
moles of NaOH = 0.001351 mol
According to the stoichiometry of the equation, 1 mole of CO2 reacts with 2 moles of NaOH. Therefore, the moles of CO2 can be calculated as:
moles of CO2 = (moles of NaOH) / 2
moles of CO2 = 0.001351 mol / 2
moles of CO2 = 0.0006755 mol
Now, we need to convert the moles of CO2 to grams. The molar mass of CO2 is approximately 44.01 g/mol.
mass of CO2 = moles of CO2 × molar mass of CO2
mass of CO2 = 0.0006755 mol × 44.01 g/mol
mass of CO2 = 0.02979 g
Finally, we need to express the concentration of CO2 in club soda in g/L. We are given that the sample of club soda used is 25.00 mL.
concentration of CO2 = (mass of CO2) / (volume of club soda in L)
concentration of CO2 = 0.02979 g / (25.00 mL × 0.001 L/mL)
concentration of CO2 = 1.1964 g/L
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Sunspot populations quickly rise and more slowly fall on an irregular cycle about every 11 years. Significant variations of the 11-year period are known over longer spans of time. For example, from 1900 to the 1960s the solar maxima (the period of greatest activity in the solar cycle of the sun) trend of sunspot count has been upward; from the 1960s to the present, it has diminished somewhat. The Sun is presently at a markedly heightened level of sunspot activity and was last similarly active over 8,000 years ago.
The number of sunspots correlates with the intensity of solar radiation over the period (since 1979) when satellite measurements of absolute radiative flux were available. Since sunspots are darker than the surrounding photosphere it might be expected that more sunspots would lead to less solar radiation and a decreased solar constant. However, the surrounding margins of sunspots are hotter than the average, and so are brighter; overall, more sunspots increase the sun's solar constant or brightness. During the Maunder Minimum in the 17th Century there were hardly any sunspots at all. The Maunder Minimum is the name given to the period roughly from 1645 to 1715, when sunspots became exceedingly rare, as noted by solar observers of the time. It is named after the solar astronomer Edward W. Maunder (1851-1928) who discovered the dearth of sunspots during that period by studying records from those years. During one 30-year period within the Maunder Minimum, for example, astronomers observed only about 50 sunspots, as opposed to a more typical 40,000-50,000 spots. This coincides with a period of cooling known as the Little Ice Age.
1) Which of the following is a true statement?:
A. There were more sunspots in 1965 than in 1701
B. The Little Ice Age had nothing to do with sunspots
C. The Sun is presently at a low level of sunspot activity
D. No one is counting sunspot activity any more
Answers
The Sun is presently at a low level of sunspot activity. Hence, option C is correct.
What is solar radiation?Solar radiation is often called the solar resource for the electromagnetic radiation emitted by the sun.
The Sun is presently at a low level of sunspot activity is the correct answer.
Hence, option C is correct.
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The density of carbon dioxide is 1.98kg/m^3. Express the density of CO2 in grams/cm^3
Answers
Answer:
Explanation:
We know that,
1 kg = 1000 g
1 m = 100 cm
Therefore
1 m^3 = 1000000 cm^3
Therefore in order to convert the density of CO2 in grams/cm^3
1.98 kg/m^3 = (1.98 × 1000) / 10^6
=1.98 × 10^(-3) grams/cm^3.
A sample of an ideal gas has a volume of 2.35L at 2.90x10^2 K and 1.09 atm. Calculate the pressure when the volume is 1.59L and the temperature is 306K
Answers
P1V1/T1=P2V2/T2
Where P1=1.09atm
V1=2.35L
T1=2.90x10^2K
P2=?
V2=1.59L
T2=306K
Solution
1.09atmx2.35L/2.90x10^2K=P2x1.59L/306K
P2=1.09atmx2.35Lx306K/1.59Lx290K
P2=1.09atmx2.35x306/1.59x290
P2=783.819atm/461.1
P2=1.6998atm approximately to 1 decimal =1.7atm.
Calculate the partial
pressure of argon in a
gas mixture with a total
pressure of 2.4 atm.
The partial pressures
of the other gases are:
O2 = 128.0 mmHg
He = 167.5 mmHg and
Ne= 760.0 mmHg
Answers
The required partial pressure of argon gas present in the mixture is 1.02 atm.
What is Dalton law of gas?Dalton's law of gas states that total pressure of any mixture of gas is sum of the partial pressure of all the gases present in that mixture.
Given that,
Total pressure of mixture = 2.4 atm
Partial pressure of argon = ?
Partial pressure of oxygen = 128 mmHg = 0.168 atm
Partial pressure of helium = 167.5 mmHg = 0.220 atm
Partial pressure of neon = 760 mmHg = 1 atm
On putting all these values according to the definition we get the partial pressure of argon gas as:
Partial pressure of argon = 2.4 - (0.168 + 0.22 + 1) = 1.02 atm
Hence required partial pressure of argon gas is 1.02 atm
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C6H12O6 + 602 → 6CO2 + 6H₂O
The most efficient ratio is
1 C6H12O6 6 02.
Which set of reactants will be the most
efficient (least wasteful of materials) for
the reaction?
A. 1.0 mol C6H12O6 and 3.0 mol O₂
B. 1.5 mol C6H₁2O6 and 3.0 mol O₂
C. 3.0 mol C6H₁2O6 and 6.0 mol O₂
D. 0.5 mol C6H₁2O6 and 3.0 mol O₂
Answers
Answer:
D
Explanation:
The ratio of C6H12O6 (which will be referred to as "the carb") to oxygen is 1 to 6, so if we find an answer which has the same ratio, it should be chosen. A is 1:3
B is even worse with a ratio of the carb to oxygen of 1:2
C is the same as B, 1:2
D has a ratio of the carb to oxygen of 1:6, which is what we are looking for.
You are on a field trip to a nearby lake for biology class and want to perform a quick analysis of the water’s approximate pH level. Which pH measurement system would you use and why?
Answers
1. Molecules are held together by:
a, ionic bonds
b. covalent bonds
c. both a and b
Answers
A: ionic bond, you know why becasue it is
The 2013 Rolls Royce Ghost Alpine has a top speed of 155 miles per hour. Calculate the speed in centimeters per second.
Answers
AutoChina Shanghai 2013 also plays host to the world debut of the latest Bespoke Collection from the world’s pinnacle super-luxury marque.
The Alpine Trial Centenary Collection celebrates an extraordinary moment in Rolls-Royce and automotive history. A century ago this June, four Rolls-Royce Silver Ghosts embarked on the Austrian Alpine Trials, the most arduous test of automotive endurance of the time.
In performing without fault over 1820 gruelling miles of near impassable mountain terrain, the Rolls-Royce works team and privateer entrant James Radley helped cement the marque’s reputation for peerless reliability and mechanical excellence, a reputation the company proudly retains today. In doing so establishing the legend of Rolls-Royce as maker of the ‘Best Car in the World’.
This limited edition of Rolls-Royce Ghosts feature exquisitely crafted design cues that pay tribute to these extraordinary motor cars. The exterior paint hue, for example takes close inspiration from Radley’s Silver Ghost, a car that stands side-by-side with the 2013 model in Shanghai.
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is a pH an atom, ion, molecule, macromolecule, or a cell?
Answers
Although there is some variation amongst tissues, the physiologically typical intracellular pH ranges from 7.0 to 7.4. Skeletal muscle in mammals typically has a pHi of 6.8 to 7.1.
A cell is it an atom?A cell is the basic membrane-bound living thing and can either have one or more cells. All the molecules required for an organism to function are found in cells. An atomic is 10-10m in size. In contrast, a cellular is 10-6 metres in size. Because all cells are composed of atoms, they are therefore bigger than atoms.
What keeps a cell's pH stable?Acid excretion, efflux through plasma membranes, and buffering mechanisms all work together to precisely preserve the pH of body fluids. Protons are extruded from the cytosol into the extracellular space through the organic cation transporter (MCT) and the Na+/H+ exchanger (NHE).
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How much potassium nitrate could be dissolved into 2L of water
Answers
Answer:
About 110 g.
Your tool of choice here will be the solubility graph for potassium nitrate, KNO3, in water.
Answer:
613
Explanation:
search up that question at coursehero.com...these questions were originally made there, with the answers
how do you Calculate the molarity of 250 ml of solution in which 2.7 g of MgCl2 are dissolved
Answers
Answer:
Molar mass of MgCl2 is 95 g/mol
Mg = 24 g/mol and Cl = 35.5 ×2 = 71 g/mol
moles = mass given/ molar mass
= 2.7/95 = 0.028 mol
volume = 250/1000 = 0.25 dm3 (ml is the same as dm3)
molarity of MgCl2 = moles/volume
= 0.028/0.25
= 0.112 mol/dm3
Calculate the standard entropy change
C2H2 (g) + 2H2 (g) → C2H6 (g
C2H2= 201
H2=131
C2H6 = 230
Answers
Entropy is a notion that essentially refers to the universe's propensity for chaos or the spontaneous changes that take place in everyday happenings. Here the standard entropy change for the given reaction is -233.
Entropy is typically referred to as a measurement of a system's randomness or disorder. In the year 1850, a German physicist by the name of Rudolf Clausius first proposed this idea. Entropy is a thermodynamic property that is used to characterize how a system behaves in terms of temperature, pressure, entropy, and heat capacity.
Here the standard entropy change is:
Entropy of products - entropy of reactants
ΔS = 230 - (201 + 2 ( 131)) = -233
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All else being equal, air volume increases when pressure decreases. Use this relationship to explain why warm air at the equator rises up through the less dense air above it.
Answers
The relation between the volume and the pressure of the gas can be given by the ideal gas equation. Warm air has more volume and low pressure that makes them rise above the equator.
What is atmospheric pressure?Pressure present and exerted by the atmospheric gases are called atmospheric pressure. The volume of the gas is in inverse relation to the pressure of the gas.
Warm air has a high volume compared to cold air. More volume results in low pressure making them rise above the dense layer of the equator region.
Therefore, the warm air rises due to a decrease in pressure.
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Which is NOT a compound?
A. silicon dioxide
B. water
C. carbon dioxide gas
D. oxygen gas
Answers
Answer: Oxygen
Explanation: Its found on the periodic table as an element.
Write the correct IUPAC name for the following compounds: Mg(NO3)2 ,CaCl2 S2Cl4 ,HI (aq) and FeBr3
Answers
IUPAC name is the systematic name given to a chemical compound according to the rules and guidelines set forth by IUPAC.
What does IUPAC stand for?IUPAC is short for International Union of Pure and Applied Chemistry. The IUPAC name provides a standard and unambiguous way of naming chemical compounds, which is important for communication among scientists and for the accurate reporting of chemical information.
The IUPAC name is typically based on the structure and composition of the compound, and it provides information about the functional groups and other features of the molecule. The naming rules take into account factors such as the number and type of atoms, the arrangement of atoms within the molecule, and the presence of functional groups.
The accurate IUPAC names for the given substances are:
Mg(NO3)2: Magnesium nitrate
CaCl2: Calcium chloride
S2Cl4: Disulfur tetrachloride
HI (aq): Hydrogen iodide or Hydroiodic acid
FeBr3: Iron(III) bromide
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A 54.2 g sample of polystyrene, which has a specific heat capacity of 1.880 J-gc, is put into a calorimeter (see sketch at
right) that contains 100.0 g of water. The temperature of the water starts off at 21.0 °C. When the temperature of the water stops
changing it's 34.3 °C. The pressure remains constant at 1 atm.
Calculate the initial temperature of the polystyrene sample. Be sure your answer is rounded to the correct number of significant
digits.
thermometer.
insulated
container
water
sample.
a calorimeter
Answers
Tthe initial temperature of the polystyrene sample is 39.4°C.
Given: Mass of polystyrene sample = 54.2 gSpecific heat of polystyrene = 1.880 J-g°CWater mass = 100.0 g Initial water temperature = 21.0°CWater final temperature = 34.3°CPressure remains constant at 1 atmFormula used:Heat gained by water = heat lost by polystyreneHence,Heat lost by polystyrene = Heat gained by water=> mcΔT = mcΔTwhere,m = mass of polystyrene or waterc = specific heat capacityΔT = change in temperatureThe temperature change is ΔT = 34.3°C - 21.0°C = 13.3°CNow we can use this temperature change to calculate the initial temperature of the polystyrene.Taking the water's specific heat capacity, c = 4.184 J/g°CHeat gained by water = (100.0 g)(4.184 J/g°C)(13.3°C) = 5574 JHeat lost by polystyrene = 5574 JTaking the polystyrene's specific heat capacity, c = 1.880 J/g° ) = 13.3°C Now let's calculate the mass of polystyrene using the specific heat capacity formula.5574 J = (54.2 g)(1.880 J/g°C)(13.3°C - Ti)Ti = 39.4°C
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•) At 741 torr and 44°c, 7.10gol a gas occupy a volume of 5.40ml
what is the moler mass of the gas?
Answers
3.5 × 10^6 g
according to ideal gas equation, PV = nRT
where, p is pressure v is volume, n is mole of gas, r is gas onstant and t is temperature.
Pressure (p) = 741 Torr = 1 bar
Volume (V) = 5.40 ml= 0.0054litre
Amount of substance (n) mol = ?
Temperature (T) 44°C= 371kelvin
so by putting all values in equation. PV = nRT
= 1 × 0.0054 =n ×8.31 ×371
n ≈ 0.000002 = 2.0 × 10^-6
now, n is mole of gase,
mole = given mass ÷ molecular mass
given mass = 7.10g
molecular mass = given mass ÷ mole
7.10 ÷ 2.0 × 10^-6
= 3.5 × 10^6 g
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Think about the parts of an egg, and write down why you think it can act as a model of an animal cell. Also write down your predictions of what will happen when you leave an egg in vinegar for three days.
Answers
Answer:
Explanation:
Determine the treatments you’ll be using on your eggs, and prepare the substances you’ll need. You can make salt-water solutions by dissolving different amounts of table salt in containers of water (e.g. 100g, 200g, 300g of salt (NaCl) per liter). You can make solutions of food coloring by adding a few drops of each color into containers of
The Eggsperiment with Vinegar solution. The first experiment conducted was the egg placed in vinegar solution which allowed the egg to become soft and bouncy . Vinegar is a weak acid which is 5% acetic acid in water (meaning vinegar is largely just water). The egg has a shell that is made up of calcium carbonate an air cell forms at the large end of the egg. While the embryo is growing, the shell membranes surround and contain the white or albumen of the egg. The albumen provides the liquid medium in which the embryo develops, and it also contains a large amount of the protein necessary for proper development. I hope this was hopeful
How do I fill out this chart?
Answers
Period is the horizontal part (left and right).
The Family name is the category it is in such as Alkali Earth Metal, Alkali Metals, Transition Metals, Metalloids, Non-Metal, Halogens, and Noble Gases.
End Orbital is the ending of the electron configuration (complete this first before starting on end orbital.
VE is the valance electron (the number of electrons on the outer more shell) You can find this by looking at the periodic table. Group 1 = 1 VE
Group 2 = 2 VE
Group 13 (3A) = 3 VE
Group 13 (4A) = 4 VE
Cation (positive charge) and Anion (negative charge) are the charges of the element.
Group 1 = +1 charge
Group 2 = +2 charge
Group 13 (3A)= +3 charge
Group 15 (5A) = -3 charge
Group 16 (6A) = -2 charge
Group 17 (7A) = -1 charge
I am unsure about Block and Nature section
Describe a chemical property of iron that you observed.
Answers
Answer:
Iron can rust in damp conditions. Or, it can dissolve readily in dilute acids.
Explanation:
Hurry I need the answer asap
Answers
Answer:
The image represents liquid
What branch of chemistry studies the flow of electrons?
A. Inorganic chemistry
B. Electrochemistry
C. Quantum chemistry
D. Organic chemistry
Answers
Answer:
Your answer is B, Electrochemistry!
Explanation:
This is the part of chemistry that studies the chemical process in which electrons flow. This flow is called electricity. Electricity is generated by the flow of electrons, from one element to another element. This reaction is called oxidation reduction.
Answer: B
Explanation: