Chemistry

Calculate the mass (in ) of each of the following.

1) 6.26*10^20 SO3 2)3.3*10^22 H2O 3)4.0*10^25 O3 4)9.98*10^19 CCl2F2-1) (6.26*10^20 molecules SO3) / (6.022*10^23 molecules/ mole) x (80.0638 g SO3/mole) = 0.0832 g SO3 2) (3.3*10^22 molecules H2O)

What is the solubility-product constant of magnesium hydroxide, Mg(OH)2? Its solubility is 9.0 x 10–4 g/100 g

Chemistry help Please!-I am assuming that the solubility of Mg(OH)2 is 9.0 x 10^-4 g of Mg(OH)2 to 100 g water. Since the molar mass of Mg(OH)2 is 24.31 + 2(16 + 1) = 58.31 g/mol, we see that we have

A gas at 67°C occupies a volume of 0.67 L. At what Celsius temperature will the volume increase to 1.92 L

Best answer!!! for the right one and i need it quick!-Charles Law V1/T1 = V2/T2 0.67 L / 340 K = 1.92 L / x x = 974 K or 701 °C

Pre-ap chemistry question! One question, help

C3H8 + 502 ---> 3CO2 + 4H20 If 20 liters of oxygen are consumed in the above reaction, how many liters of carbon dioxide are produced? Please show me how to do the work so it will help me on the oth

Give the empirical formula for the substance

Give the empirical formula for the substance whole molecular formula is Si2H6. I dont remember how to do the empirical formula.. Can someone please give me a little review with explanation?-the empiri

Chemistry help! Multiple choice

1. Magnesium chloride is 25.5% magnesium. What mass of magnesium could be recovered by the decomposition of 25.5g of magnesium chloride? a) 25.5g b) 35.0g c) 6.50g d) 8.94g 2. Zinc oxide contains 80.

What is the relationship between the concentration of the electrolyte of the anode half cell and cell potentia

What is the relationship between the concentration of the electrolyte of the cathode half cell and cell potential?-concentration doesnt change the potential.It plays a role in how long the cell will p

Specific heat capacity questions:

A metal ring with a mass of 21.61 g undergoes a change in temperature of 32.67 oC. The energy change, or heat, required for this change in temperature is 1563 Joules. What is the specific heat of the

Balance and tell what type of chemical reaction is represented by the following chemical equation

Mg + H2O>>>> Mg(OH)2 + h2-single replacement Mg + 2H2O----> Mg(OH)2 + H2

Do van der waals forces occur within bonds of a molecule

Electons within a bond can be distributed at any moment in time?-I think you meant covalent bonds, where electrons are shared. I think van der waals forces do occur since covalent bonds are basically

True or False: Science, chemistry, and biology is everywhere. ( 10 points for correct and best answer)

I am feeling generous today.-True. Chemistry is in food (Salt, NaCl), biology IS food (chickens, cows, etc.), biology and chemistry ARE science; AND, food is everywhere.-True. everyday there are micro

Can you please check my answers?! 10 points for best answer!!!

PLEASE just check my answers ( 1. How many valence electrons does a carbon atom have? A) 1 B) 2 C) 3 D) 4 2. How many double covalent bonds are in an alkane? A) 0 B) 1 C) 2 D) 3 3. What is the gene

In a Stoichiometry Problem....

would I use the balanced equation to represent the mole ratio of two molecules, or do i just use the original equation?-yes, always balance your equation, original just show what is produced from what

Chemistry Dalton's Law of Partial Pressures HELP PLEASE!!!

What is the total pressure if the partal pressure of gas is 1.25atm, 2.5atm, and 3.3atm? Thanks so much!-Just add the atms together to get total since the volume remains constant-add them up

Suppose that your teacher gives you a solution of an unknown chemical.The chemical is either an acid or a base

You know that touching or tasting acids and bases is not safe. What two tests could you perform on the chemical to determine whether it is an acid or a base? What results would help you decide if the