An unknown compound contains only carbon, hydrogen, and oxygen (cxhyoz). combustion of 3.50 g of this compound produced 5.13 g of carbon dioxide and 2.10 g of water. how many moles of hydrogen, h, were in the original sample?

The formula for determining the number of moles is:

Mass of compound =

Mass of carbon dioxide produced =

Mass of water produced =

Molecular weight of water,

Substituting the values in above equation:

Since, 1 mole of water contains 2 moles of hydrogen therefore, number of moles of hydrogen =

answer: option (4) is the correct answer.

explanation:

areas which are at low altitudes and near the equator tend to receive direct sunlight from the sun. hence, heat energy or radiations from the sun make these areas warmer and they have warmest water.

whereas areas which are at high altitudes and away from the equator do no receive direct sunlight. hence, no direct contact from the sun makes these regions colder and thus, they have colder water.

thus, we can conclude that the statement areas at low latitudes near the equator have the warmest water because they receive the most direct sunlight best explains the relationship between an area's geography and the temperature of its surface water.

1.solid

2.carbon dioxide

3.helium