C. All the known elements that exist in the world today
Answer:
15.0 g
Explanation:
Step 1: Given and required data
- Heat used to melt a sample of ice (Q): 5.01 kJ
- Latent heat of fusion of water (ΔH°fus): 334 kJ/kg
Step 2: Calculate the mass (m) of water
334 kJ are required to melt 1 kg of ice at 0°C (melting point of water). We can calculate the mass of ice melted by 5.01 kJ using the following expression.
<em>Q = ΔH°fus × m</em>
m = Q / ΔH°fus
m = 5.01 kJ / (334 kJ/kg)
m = 0.0150 kg = 15.0 g
We see that the molar ratio of sulfur to water is:
3 : 2
We first compute the moles of water:
moles = mass / Mr
moles = 37.4 / 18
moles = 2.08
By the ratio, moles of sulfur:
3.12
Mr sulfur = 64
mass = 3.12 x 64
mass = 199.7 grams
Answer:
Nonrenewable resources are natural resources that are not naturally replenished once they have been used. Nonrenewable resources can be used up completely or consumed to such a degree that they become economically inaccessible
Explanation:
A nonrenewable resource is a resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption. Most fossil fuels, such as oil, natural gas, and coal are considered nonrenewable resources, as their use is not sustainable because their formation takes billions of years.
Neutrons.
Electrons have little to no mass, therefore shouldn't be electrons.
Also there is only eight protons in this atom, while there are nine neutrons.