Physical Chemistry Answers

when heated, KCl3 decomposes into KCl and O2. 2KCl3= 2KCl, how many grams of O2 were produced? if this reaction produced 49.2g KCl, how many grams of O2 were produced?

the combustion of ethane (C2H6) produces carbon dioxide and steam. How many moles of CO2 are produced when 5.65 mil of ethane is burned in an excess of oxygen?

Explain why the temperature does not rise above it's boiling point even though the flask is still being heated use the word thermal energy in your answer

complete combustion of 8.00g a hydrocarbon produced 26.0g of CO2 and 7.99g of H2O. what is the empirical formula for the hydrocarbon?

I need to know how and what these problems are. Thank you!
1.) A 20 gram sample of ice was heated from -10 to 5 degrees Celsius. How much heat was gained?
2.) A 30 gram sample of water is at 68 degrees Celsius. How much heat is required to get the water to boil (100 degrees C)?
3.) A 15 gram sample of ice was heated from -15 to 120 degrees Celsius. How much heat was gained?
4.) A 15 gram sample of ice was heated from -15 to 120 degrees Celsius. How much heat was gained?
5.) A 68 gram same of liquid water was warmed up from 54 degrees Celsius to steam at 112 degrees Celsius. How was heat was absorbed?

Steve races to the nearest taco stand at lunchtime and sees that his pedometer recorded his peak speed at 76.7 cm/s. What was Steve's peak speed in kilometers per hour?

Write the balanced overall reactions for the conversion of the sodium and potassium hydrogen carbonate salts (bicarbonates) to the sodium and potassium chloride salts.

Write the balanced overall reactions for the conversion of the sodium and potassium carbonate salts to the sodium and potassium chloride salts.

explain why the molar ratio is needed to determine the theoretical mass ratios

What pressure difference must be generated across the length of a 15cm vertical drinking straw in order to drink a water-like liquid of density 1 gram per cubic centimeter?