D = 3 g/mL
V = 100 mL
M = __ g

300g

Explanation:

Density = Mass/ Volume

so 3=M/100

M=300 g

300 g

Explanation:

The formula for mass is:

Mass= Density x Volume.

So,

? = 3 g/mL x 100 m/L

The answer is:

300 g = 3 g/mL x 100 mL

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many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.