what is the charge of the cadmium cation
Answers
Answer:
In its compounds cadmium exhibits almost exclusively the +2 oxidation state, as in the colourless Cd2+ ion, which forms a number of stable complex ions, especially halide complexes.
Explanation:
Related Questions
what is Pb+FeSO4-->PbSO4+Fe balanced and the type of reaction?
Answers
Answer:
It's simple substitution reaction and there is no balance for the equation. It's right written.
Explanation:
The region of the sky which reflects radio waves around the world is the
The region of the sky which reflects radio waves around the world is the
.
Answers
The region of the sky which reflects radio waves around the world is the ionosphere.
What is the ionosphere ?The ionosphere pertains to a section of the Earth's atmosphere that becomes ionized due to the effects of solar radiation. The resulting ionization renders the ionosphere apt for electrical conductivity, thereby enabling it to effectively reflect radio waves.
The significance of the ionosphere lies in its facilitation of radio signals' transmission across extended distances, thus enabling long-range communication. The ionosphere is segmented into distinct layers, each possessing unique properties.
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what a non-renewable resource is, Give 2 examples of non-renewable resources.
Answers
Answer: coal and natural gas
Explanation: because it takes a long time for them to form
Answer:
Non renewable resource is fossil fuels that cannot be replaced such as coal and oil
Explanation:
the vapor pressure of benzene (c6h6) is 120 torr at 27.0◦c, and its normal boiling point is 80.1◦c. what is the molar heat of vaporization of benzene?
Answers
The molar heat of vaporization of benzene is 33.31 kJ/mol.
About VaporizationThe molar heat of vaporization of benzene can be calculated using the Clausius-Clapeyron equation. This equation relates the vapor pressure of a substance at two different temperatures to its molar heat of vaporization.
The equation is given as:
ln(P2/P1) = (-ΔHvap/R)(1/T2 - 1/T1)
Where P1 and P2 are the vapor pressures at temperatures T1 and T2, ΔHvap is the molar heat of vaporization, and R is the gas constant.
Rearranging the equation to solve for ΔHvap gives:
ΔHvap = (-R ln(P2/P1))/(1/T2 - 1/T1)
Plugging in the given values:
P1 = 120 torr
T1 = 27.0°C + 273.15 = 300.15
KP2 = 760 torr (normal boiling point)
T2 = 80.1°C + 273.15 = 353.25
KR = 8.314 J/mol·K
ΔHvap = (-8.314 J/mol·K ln(760/120))/(1/353.25 - 1/300.15)
ΔHvap = 33,310 J/mol or 33.31 kJ/mol
Therefore, the molar heat of vaporization of benzene is 33.31 kJ/mol.
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How many g of water are required to be mixed with 11.75 g of HgCl in order to make a 0.01 m solution? (Refer to the periodic table for atomic weights.)
a.) 40 g
b.) 5,000 g
c.) 2 x 10^8 g
d.) 2 x 10^6 g
The general name for a substance added to a reaction that affects the rate but is not consumed in the reaction is called a_____.
a.)constituent
b.)catalyst
c.)complex
d.)reactant
The action of a catalyst can be explained in the following manner:
a.) The catalyst makes it possible for the reaction to take place by another path that makes possible reaction at a lower energy.
b.) The catalyst takes no part in the reaction but serves as a buffer between reactants and products.
c.) The catalyst prevents the reverse reaction.
d.) The catalyst lowers the temperature of the reactants.
The energy level necessary to enable a reaction to occur is called the_____ energy.
a.) potential
b.) kinetic
c.) activation
d.) nuclear
Raising the temperature of a reacting system increases the rate of the reaction, but does NOT increase the:
a.) number of collisions
b.) average velocity of the reacting particles
c.) activation energy
d.) vibrational motions within the molecules
e.) fraction of the reacting particles which possess energies greater than the activation energy
Answers
Answer:
5,000 g
b.)catalyst
The catalyst makes it possible for the reaction to take place by another path that makes possible reaction at a lower energy.
activation
activation energy
Explanation:
Formulae for molality = number of moles of solute/mass of solvent in kilograms
Number of moles of solute= 11.75g/236 g/mol = 0.0498 moles
0.01 = 0.0498/x
x= 0.0498/0.01
x= 5 Kg or 5000 g
A catalyst refers to any substance that alters the rate of reaction but remains unaffected at the end of the reaction. The catalyst lowers the activation energy of a reaction.
For a chemical reaction to occur, the substances participating in that reaction must possess energy which is greater than the activation energy of the reaction. The activation energy is a sort of energy barrier between reactants and products which must be surmounted before a reaction can take place.
When the temperature of a reaction system is raised, the molecules move faster and the number of effective collisions in the system increases. However, raising the temperature does not raise the activation energy of the system.
Explain how scientists know there are different layers of the earth
Answers
A double replacement reaction has two compounds as reactants.
True or false
Answers
Answer:
yes, A double replacement reaction has two compounds as reactants.
hence it's true.......
Answer:
it's true...
Explanation:
Which element has the greatest average atomic mass? A. iodine B. bromine C. tellurium D. krypton
Answers
Chlorine can bond with fluorine to form ClF. Chlorine can also bond with lithium to form LiCl. Which compound will have a greater partial charge?Question 2 options:A) Both compounds will have the same partial charge.B) ClFC) LiClD) Neither compound will have partial charge.
Answers
In this question, we have two compounds, ClF and LiCl. The first molecule is a covalent compound, since we will not have donation of electrons but instead the sharing of electrons, but in this case, the difference of the electronegativity will cause this molecule to have Polar covalent bond, which will cause partial charges to occur. LiCl is a molecule in which we have a greater difference in electronegativity, which makes this molecule be an ionic molecule, and not covalent. Since ionic compounds have real charges, the only possible answer will be ClF, since they have partial charges. Letter B
a. In the complete reaction of 22.99 g of sodium
with 35.45 g of chlorine, what mass of sodium
chloride is formed?
Answers
Answer : 58.44 g
Further explanationThe reaction
\(\tt Na+Cl\Rightarrow NaCl\)
mole ratio :
Na : Cl : NaCl = 1 : 1 : 1
Molar mass of Na : 22,989769 g/mol = 22.99 g/mol
Molar mass of Cl : 35,453 g/mol= 35.45 g/mol
Molar mass of NaCl : 58,44 g/mol
Let's check the mol for reactant (Na and Cl) and product(NaCl)
mol of Na :\(\tt mol=\dfrac{22.99}{22.99}=1\)
mol of Cl :\(\tt mol=\dfrac{35.45}{35.45}=1\)
Then the reactants are completed reacting because it matches the mole ratio, which is 1: 1
so that the mole of the product can be determined from the mol Na or Cl, which is 1
mass of NaCl :\(\tt =\dfrac{mol~NaCl}{mol~Na}\times MW~NaCl\\\\=\dfrac{1}{1}\times 58.44\\\\=\boxed{\bold{58.44~g}}\)
A sample of iron (||) sulfide has a mass of 3492 g. How many sulfur atoms are in the sample
Answers
653 x 10^23 atoms of sulfur are in the sample.
There are 6.02 x 10^23 molecules in 1 mole of a substance. 1 mole of iron sulfide is composed of 1 mole of iron and 1 mole of sulfur.
1 mole of iron = 55.845 g
1 mole of sulfur = 32.065 g
Therefore, 3492 g of iron sulfide contains:
Iron Molecules = (3492 g x (1 mole / 55.845 g)) = 62.22 moles of iron
Sulfur Molecules = (3492 g x (1 mole / 32.065 g)) = 108.55 moles of sulfur
Number of sulfur atoms = (108.55 moles x (6.02 x 10^23 molecules / 1 mole)) = 653 x 10^23 atoms of sulfur
Iron and sulphur combine to form the inorganic molecule known as iron(||) sulphide. It is a solid that is black and insoluble and is used to make various types of steel as well as some industrial chemicals. Additionally, iron (||) sulphide is employed as a catalyst in some chemical processes.
A compound's atomic composition can be determined by looking at its molecular formula. The types and amounts of atoms that make up a single chemical molecule are identified by the molecular formula. You must divide each element's subscript in the molecular formula by the smallest common multiple of all the subscripts to determine the number of atoms in each element. You will receive the compound's elemental ratio after doing this. To determine the number of atoms in each element, multiply this ratio by the total number of atoms in the compound.
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what is the importance of polar covalent and hydrogen bonds in the structure of water?
Answers
Answer:
Water is a remarkable substance, and its unique properties are largely due to the presence of polar covalent bonds and hydrogen bonds in its structure. These characteristics play a crucial role in the physical and chemical properties of water, making it essential for life as we know it.
Explanation:
The polar covalent bonds in water arise from the unequal sharing of electrons between oxygen and hydrogen atoms. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+). These charges create polarity within the water molecule, leading to the formation of hydrogen bonds.
Hydrogen bonds occur when the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule. These hydrogen bonds are relatively weak individually, but when present in large numbers, they contribute to the cohesion, surface tension, and high boiling point of water.
The importance of these bonds is manifold. The cohesion between water molecules due to hydrogen bonding enables water to form droplets, have a high surface tension, and flow freely, facilitating transport within organisms and in the environment. Additionally, hydrogen bonding leads to the high specific heat capacity and heat of vaporization of water, making it an effective regulator of temperature in living organisms and ensuring stable environmental conditions.
Furthermore, hydrogen bonds play a crucial role in the unique properties of water as a solvent. The polar nature of water allows it to dissolve a wide range of substances, including ionic compounds and polar molecules, facilitating various biological processes such as nutrient transport and chemical reactions in cells.
In which list can all particles be accelerated by an electric field?
1) Alpha, beta, and neutrons.
2) Alpha, protons, and neutrons.
3) Alpha, beta, and protons.
4) Beta, protons, and neutrons
Answers
Alpha, beta, and protons can all particles be accelerated by an electric field. Therefore, option 3 is correct.
What is an electric field ?The physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them, is known as an electric field. It also refers to the physical field of a charged particle system.
Particle acceleration is a straightforward concept: an electric field moves a charged particle from one location to another. Because electric fields do not act on neutral particles, they can only accelerate electrons, protons, ions, and various antiparticles.
Thus, option 3 is correct.
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Will mark brainly
ASAP
Answers
Answer:
A. Shivering
Explanation:
This is the job of the excretory system. You remove waste as a gas (carbon dioxide), as a liquid (urine and sweat), and as a solid. Excretion is the process of removing wastes and excess water from the body. Recall that carbon dioxide travels through the blood and is transferred to the lungs where it is exhaled.
What type of reaction is: iron + sulfur -> iron sulfide? A. Double Replacement B. Decomposition C. Synthesis D. Combustion
Answers
Answer:
Hi there. In this question, we are trying to classify this reaction type. What we see happening here is we're told that we have sulfur which is in its solid state and it is reacting with solid iron And they're going to produce solid Iron three sulfide. So that is going to be f. E two S. Three. And that is a solid. I know it was F. E two S. Three because the iron three tells us the charge on the iron is three plus and sulfur voice forms ions with a too negative charge. Therefore it has to be FE two S 3. We can balance this equation although that's not necessary for this problem. But it's kind of quick. So I'll go ahead and do that. Okay, but we want to know what type of reaction it is. So we're looking for a pattern here when we see an element sulfur, it's combining with another element iron and it's producing a compound. So only one product. Alright, so looking at this general reaction type, there's only one reaction type of those five listed there, there's only one reaction type that has just one product and that is a synthesis reaction. A synthesis reaction follows this pattern where we are taking two or more simpler substances and combining them to make more complex compounds. Alright, with the simplest synthesis being element plus element equals compound. So this would be a synthesis reaction. Thank you for asking a question. And I hope this was helpful
Answer:
It should be D) Combustion Reaction
Acetone i a common olvent that ha a denity of 0. 7899 g/mL. What volume of acetone, in milliliter, ha a ma of 41. 3 g ?
Answers
The volume of acetone, in milliliters, that has a mass of 41.3 grams is 52.28 mL.
What is the relationship between the mass, volume, and density of a substance?The relationship between the mass, volume, and density of a substance is given mathematically as follows;
Density = mass / volumeHence, the density of a substance is directly proportional to its mass and inversely proportional to its volume.
The volume of acetone that has a mass of 41,3 g is determined from the density of acetone as follows:
Volume = mass / density
Volume = 41.3 / 0.7899
The volume of acetone = 52.28 mL
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Which explains the change in ionization energy that occurs between removing the first and second electrons from an atom?
Answers
Answer:
"The strength of ionization decreases as the proportion including its protons to the excited electrons" is the right solution.
Explanation:
The ionizing procedure, the creation of ions through manipulating individual atoms or revolutionaries, or through decreasing or increasing charged particles in something other than gas by intense electrical fields.It should be the total removal of someone with an electron through an atomic nucleus rather than from molecules. The corresponding molecule has denominated an ion.This question seems incomplete. I believe the answer choices are as followed:
O The ionization energy decreases because the ratio of the protons to electrons increases.
O The ionization energy increases because the ratio of the protons to electrons increases.
O The ionization energy decreases because the ratio of the protons to electrons decreases.
O The ionization energy increases because the ratio of the protons to electrons decreases.
The answer to this is The ionization energy increases because the ratio of the protons to electrons increases. (2nd option).
Which feature on Earth’s surface is a result of a constructive geological process?
Answers
74.7 g of Calcium Chlorate = __mol
Answers
Answer:
747 mol.
Explanation:
A marine biologist is preparing a deep-sea submersible for a dive. The sub stores breathing air under high pressure in aspherical air tank that measures 63.0 cm wide.The biologist estimates she will need 5300. L of air for the dive. Calculate the pressure to which this volume of air must becompressed in order to fit into the air tank. Write your answer in atmospheres. Round your answer to 3 significant digits.X5 ?EdoloAr184
Answers
The following assumptions are made:
1. Air behaves like an ideal gas throughout the process.
2. The initial pressure will be equal to the atmospheric pressure at sea level, 1atm.
3. The temperature remains constant.
Taking into account the above, we can apply the Boyle-Marriote Law that relates the change in pressure and volume at constant temperature. The equation tells us:
\(P_1V_1=P_2V_2\)Where,
P1 is the initial pressure, 1atm
V1 is the initial volume, 5300L
P2 is the final pressure inside the air tank, this is our unknown
V2 is the final volume, this will be calculated using the volume equation for a sphere:
\(V_2=\frac{4}{3}\pi r^3\)r is the radius of the sphere, 63.0cm/2=31.5cm
So, the volume of the air tank will be:
\(\begin{gathered} V_2=\frac{4}{3}\pi\times(31.5cm)^3=13.1\times10^4cm^3 \\ V_2=13.1\times10^4cm^3\times\frac{1L}{1000cm^3}=131L \end{gathered}\)We clear P2 and replace the known data:
\(\begin{gathered} P_2=\frac{V_1P_1}{V_2} \\ P_2=\frac{5300L\times1atm}{131L}=40.5atm \end{gathered}\)The air must be compressed at 40.5atm
Answer: 40.5
What is the name of the binary molecule H2O2
Answers
Explanation:
H2O2: hydrogen peroxide.
hope it will help u ✌️
butane is a saturated hydrocarbon
Answers
What is the compound N₂O called?
Answers
Answer:
I believe its preferred to as "Laughing Gas." It's also called, Nitrous Oxide.
Consider the unbalanced chemical equation HBr + B = BBr3 + H2. When
coefficients are added to balance the equation, which two substances will
have a coefficient of 2?
D A. H2
B. HBr
C. BBrg
D D B
Answers
Answer:
B and BBr3
Explanation:
1) 3HBr + B = BBr3 + H2 (double all equation because H2)
2) 6HBr + 2B = 2BBr3 + 3H2
Explain how a synthesis reaction is useful to a pharmacologist
Answers
In most drug discovery efforts, compound synthesis is regarded as the rate-limiting phase to accommodate various functional groups.
One of the most typical kinds of chemical reactions is a synthesis reaction, also known as a direct combination reaction. A + B AB is the result of the reaction between two and more chemical species in a synthesis.
The synthesis process is simple to identify in this form since there are more reactants then products. One bigger compound is created when multiple reactants come together. Synthesis reactions can be thought of as the opposite of breakdown processes. In most drug discovery efforts, compound synthesis is regarded as the rate-limiting phase to accommodate various functional groups.
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A ____________ contains specific instructions for making proteins.
a.
chromosome
b.
gene
c.
molecule
d.
ribosome
Answers
what will you use to prepare the calibration curve in this project? group of answer choices a solvent blank. a series of solutions with the exact same analyte concentration. a series of solutions with various unknown analyte concentrations. a series of solutions with a range of precisely known analyte concentrations.
Answers
A series of solutions with a range of precisely known analyte concentrations. Option D
What is a calibration curve?A calibration curve is a graphical representation of the relationship between the concentration or amount of a substance, and a signal or measurement obtained from an analytical instrument or assay. The calibration curve is constructed by measuring the signal or response of the instrument or assay at different known concentrations or amounts of the substance, and plotting these values on a graph.
The resulting curve is then used to determine the concentration or amount of the substance in an unknown sample by measuring its signal or response and comparing it to the calibration curve.
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HELP
Between steps 2 and 3, the chemical energy in the coal is converted to
Answers
Answer:
Transitional Energy ......
Explanation:
Hope this helps..................................
Answer:
heat energy!!!
Explanation:
What is a disadvantage of geothermal energy
Answers
Answer:
it runs the risk of triggering earthquakes. releases harmful gases
what is the difference between groups and periods on the periodic table.? What do they tell you?
Answers
.Answer:
Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period.
Explanation: