Lead has a density of 11.4 grams per mL. If I make a statue out of 3.78 grams of lead, what is the statues volume

0.332mL

Explanation:

11.4g/mL is 11.4 for every one mL

11.4g / 1mL needs to be the same ratio as 3.78g to an unknown value, let's call it x.

11.4g/1mL = 3.78g/x

We cross multiply: 1*3.78 = 11.4*x

3.78 = 11.4x

Now isolate x by diving 11.4 on both sides: 0.331578974mL = x

In chemistry, we usually round to significant figures, so our answer would be 0.332mL

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

i have no clue hope you find the answer