Given the reaction 2C2H2(g) + 5O2(g) ! 4CO2(g) + 2H2O(g) , how much oxygen gas is needed for the complete combustion of 167 g of acetylene (C2H2)? Answer in units of g

How many calories are required to warm 15.0 g of water from 75 C to 100.0 C and convert it to steam at 100.0 C? The heat of vaporization of water is 540 cal/g.

What is the product of the following reaction?

Complete the following reaction by supplying the missing reactant()s):

What is the number of the carbon atom that determines whether the carbohydrate is the a- or B-pryranose form?

How much heat (in kj) is evolved in converting 1 mol of steam at 135 degrees celsius to ice at -50 degrees c?

Calculate the mass in grams for a sample of aluminum that absorbs 1.40 when its temperature rises from 66 to 194.

Rank the enthalpy of solution from most exothermic to most endothermic. To rank items as equivalent, overlap them.

3. The pH increased from 5.8, the normal pH of a cigarette , to pH 6.4 by addition of ammonia. How many moles of ammonia are required to produce this pH change per cigarette (volume approx. 5ml)?(Assume that no unprotonated ammonia will exist at pH 6.4)

Is PbCO3 (s) PbO (s) + CO2 (g) a combination reaction?