Answer:
1. They are found in nearly limitless supply.
Renewable resources are those which are abundantly present in nature and can be replenished again after single use. For example water, air and sunlight.
2. increased
Over the past 100 years, the amount of fossil fuel consumption has increased because with the increase in the population cover all over the world, the requirement of fossil fuels is also increasing. Fossil fuels are required for the generation of thermal and electrical energy.
3. United States
The United States is the reservoir of coal. It is a chief exporter of the coal to India, Netherlands , Japan, South Korea and Brazil.
In 1 mole of 
, there are 3 moles of ions, 1 mole of Ca^{2+} and 2 mole of 
.
Molar mass of is 110.98 g/mol. Calculating number of moles from given mass as follows:
Thus, number of moles of ions will be 
.
Since, 1 mole of any substance has 
units of that substance where is Avogadro's number.
Thus, 9.38 mol of ions will have 
number of ions.
Therefore, total number of ions in 347 g of is 
.
Answer: im pretty sure it is b but a is also good i going to be honest it a multi chose and i ant good at those
Explanation:
PH decreases because increasing the hydrogen ion concentration makes the solution more acidic. The lower the pH, the more acidic it is therefore pH decreases.
The prefix di- means that there are two nitrogens.
Just like in carbon dioxide (CO2) there is one carbon and two oxides
