01/27/19

A liquid has a volume of 40.0 mL and a mass of 45 grams. What is the specific gravity?

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01/27/19

Gasoline has a density of 0.66 g/mL. What is the volume if it’s mass is 4.25 grams?
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01/27/19

Calculate the mass, in grams, of 1.505 x 10^24 molecules of carbon dioxide, CO2
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01/27/19

If copper has a density of 8.96 g/cm3, what is the volume of 5,800 g of copper?
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01/27/19

what is the mass(in kg) of 2.0 m^3 of diatomic bromine
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01/27/19

Chemistry , solving a question

If your front lawn is 23.0 feet wide and 20.0 feet long, and each square foot of lawn accumulates 1050 new snow flakes every minute, how much snow ( in kilograms) accumulates on your lawn per hour?... more
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01/26/19

How many atoms of 6Li are there in 12.6 g of 6Li?
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01/26/19

Given the balanced equation 2NaCl + H2SO4 = Na2SO4 + 2HCl. How many moles of sodium sulfate will be formed from the reaction?
Sodium chloride reacts with sulfuric acid to form sodium sulfate and hydrochloric acid. 
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01/26/19

If you add 31 to twice a number , the result is 15. What is the number ?
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01/26/19

What pressure would it take to compress 350. L of helium gas initially at 1.00 atm into a 2.00 L tank at constant temperature
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01/26/19

What needs to be considered in balancing redox reactions
The options are A. OxidationB. Both atoms and charge C. Both H^+ and OH^- ionsD. Voltage and oxidation states
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01/25/19

Measuring matter
if you have an obiect with a mass of 250 grams and a colume calculated by volume displacement of 522 milliliters what is the desiry of that object?
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01/25/19

How many moles in 28 grams of CO2?

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01/25/19

Chemistry Molarity
What mass of NaOH is required to make 500 mL of 1 M NaOH solution?
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01/24/19

What is the molar enthalpy of formation for ammonia?
Hi I'm having issues relating hess's law to this question:The given chemical equation represent the combustion of ammonia and the combustion of hydrogen 1. 4NH3+3O2-->6H2O + 2N2. ( deltaH1 =... more
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01/24/19

what is the volume of the gas 5.08 L N2
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01/24/19

N 2      + H 2      → NH 3 How many moles of ammonia (NH3) are produced when 6 moles of hydrogen gas react with nitrogen gas?
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01/24/19

How much thermal energy, in joules, is required to increase the temperature of a 115-g water sample by 10.0 C
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01/24/19

chemistry question
Calculate the heat energy released when 27.8 g of liquid mercury at 25.00 °C is converted to solid mercury at its melting point.
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01/24/19

chemistry question
The heat of vaporization of water is 40.66 kJ/mol. How much heat is absorbed when 2.38 g of water boils at atmospheric pressure?
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01/24/19

chemistry question
At 1 atm, how much energy is required to heat 77.0 g of H2O(s) at –10.0 °C to H2O(g) at 157.0 °C? Helpful constants can be found here.
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01/24/19

General Chemistry 2 concentration dilution problem
3. A 4.50 *10^-2 M solution is used to prepare a series of five 100.0 mL solutions of varying concentration for use in creating a calibration curve for a spectrophotometric experiment. Determine... more
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01/23/19

How much NaCl needed to make 100ml of 0.9% NaCl solution with a needed volume of 20ml?
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01/23/19

Calculate how much sucrose you would need to measure out to make 2 liters of a 1.5 molar solution of sucrose?
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01/23/19

Which of the following are large, complex organic compounds composed of amino acid monomers? a. Carbohydrates b. Proteins c. Lipids d. Nucleic acids
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