The answer should be 12 since 4 x 3 = 12
This is because ammonia is NH^3 and if it has a number before it you multiply it with the rest of the chemical equation.
I hope this helps
Answer: B
Explanation: molarity = concentration c= n/V = 0.5 mol/ 0.05 l = 10 mol/l
Burning fossil fuels release energy in the form of heat.
<h3>
Answer:</h3>
8.64 g
<h3>
Explanation:</h3>
- Density is the ratio of mass of substance to its volume.
- It is calculated by dividing the mass of a substance by its volume.
- Density = Mass ÷ Volume
In this case we are given,
Volume of sodium chloride = 4.00 cm³
Density of sodium chloride = 2.16 g/cm³
We are required to calculate the mass of sodium chloride,
Rearranging the formula;
Mass = Density × volume
Mass of sodium chloride = 2.16 g/cm³ × 4.00 cm³
= 8.64 g
Therefore, the mass of sodium chloride is 8.64 g
