Write a paragraph to name and describe two renewable energy sources used for electricity production and examine the advantages and disadvantages. needs to be written in a POWTREE paragraph

Renewable energy describes a collection of energy technologies, i.e., solar, wind, geothermal derived from sources that are never-ending and can be replenished time after time. Most countries across the world heavily depend on fossil fuels (oil, coal and natural gas) as sources of energy to power their economies. Renewable sources are renewable, sustainable, abundant and environmentally friendly. Unlike fossil fuels, they are not going to expire soon as they are constantly replenished.

Fossil fuels are non-renewable forms of energy, meaning they utilize limited resources that will ultimately deplete, hence, driving up overall energy costs. These countries have responded to the threat by stepping up campaigns to embrace renewable forms of energy like solar and wind.

Explanation:

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1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%