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1. Calcium carbonate and sand mixture with weight of 4 grams is reacted with excees of HCl results in the production of carbon dioxide then find out the percent of calcium carbonate in the original mixture?
2. observe and answer if an unknown compound is noticed to melt at the temperature of 111 degree Celsius with a gas evolution and solidify it, this compound doesn't melt until it reaches at 155 degree Celsius temperature then explain at what time melting of this compound takes place again?
Write the electronic configuration in sublevels for the following atoms
100 mol/h of n-octane is burned in 80.0% excess air to 95.0% conversion. What is the molar flow rate of N2 in the stack gas if The n-octane is converted to a mixture carbon monoxide, carbon dioxide, and water, where the ratio of CO2 to CO is 4:1?
A particular diatomic molecule which contains H exhibits a 16.95 cm^-1 spacing between its rotational lines and bond length of 141.5 picometers. Determine the mass (in amu) of the unknown atom in the molecule.
If a sample of sodium is dropped into a container of water the reaction is:
Multiple choice questions in Nuclear chemistry - As the temperature of a sample of a radioactive element decreases, the half-life will
Using Le Chatelier's Principle to predict the effect of a change in conditions on a chemical equilibrium - Predict how the equilibrium of the following reactions will be affected by the changes listed.
Properties of subatomic particles - Fill in the missing relative masses and relative charges for each of the subatomic particles
Determine the calculated pH of the solution if initially there is 2.0mL of CH3COOH at an initial concentration of 0.89M and 0.80mL of 1.0M Hydrochloric Acid is combined.
Find out how many total moles of gas are produced If a sample has 2.10 mL of nitroglycerine (density = 1.592 g/mL) is detonated?
Compute the heat amount required to heat a 3.9kg gold bar from 28 degree Celsius to 68 degree Celsius. Given Specific heat capacity of gold = 0.128 J/g°C.
How you will protect an underground pipe line from corrosion and what are biodegradable polymers or what are conducting polymers
Determine the numbers of moles of S8 that are required to make 0.600 moles of SF4.
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