The answer you are looking for is C
Answer:
Number of moles = 0.057 × 10⁻⁷ mol
Explanation:
Given data:
Mass of SiO₂ = 3.4 × 10⁻⁷ g
Number of moles = ?
Solution:
Number of moles = mass/molar mass
Molar mass of SiO₂ = 60 g/mol
by putting values,
Number of moles = 3.4 × 10⁻⁷ g / 60 g/mol
Number of moles = 0.057 × 10⁻⁷ mol
Answer:
<h2>Density = 1.67 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula

From the question
mass = 50 g
volume = 30 mL
Substitute the values into the above formula and solve for the density
That's

Wr have the final answer as
<h3>Density = 1.67 g/mL</h3>
Hope this helps you
Your answer is B. 6.02 x 1023 grams
Answer:
0.286 moles
Explanation:
i hope this is helpful for you