Consider a sample of 10.0 g of the gaseous hydrocarbon c2h6 to answer the following question: how many moles are present in this sample?
when answering the question, include the following:
state how to find the molar mass for the hydrocarbon.
state how you know if you need to multiply or divide by the molar mass.
give the correct number of significant figures and explain why the answer has that many significant figures.

The moles of given hydrocarbon is 0.3 moles

Explanation:

To calculate the number of moles, we use the equation:

We are given:

Given mass of ethane = 10.0 g

Molar mass of ethane =

We need to divide the given value by the molar mass.

Putting values in above equation, we get:

In case of multiplication and division, the number of significant digits is taken from the value which has least precise significant digits. Here, the least precise number of significant digits are 1.

Hence, the moles of given hydrocarbon is 0.3 moles

step-by-step explanation:

whole numbers, zero or greater

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.