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MariettaO [177]
3 years ago
15

Alternative fuel sources such solar and wind energy are gaining popularity and replacing fossil fuels in many applications. Whil

e there are many positive benefits to this technology, what negative impacts do they present?
Chemistry
1 answer:
Sloan [31]3 years ago
3 0

Answer:

Environmental limitations.

Explanation:

  • The nonrenewable sources of energy include coal, oil natural gas, and nuclear power. While the renewable source of energy include tidal, solar, geothermal, and wind power. All the sources of nonrenewable energy are called fossil fuels.
  • There are many positives of this alternate energy such as clean and clear energy. Though there may be some negative impacts such as land use changes for setting up solar panels, and windmill farms. These techniques are costly to maintain and implement in all sectors.
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In 1676, Robert Plot discovered a large bone in a quarry in Cornwall, England. He observed that the bone looked similar to a hum
sergeinik [125]

Answer:

D

Explanation:

4 0
3 years ago
What is the gram molecular mass of a compound if 5 moles of the compound has a mass of 100 grams?
aivan3 [116]
5 mols = 100 grams
1 mol = 100/5
1 mol = 20 grams.
6 0
3 years ago
How many grams of zinc metal will react completely with 7.8 liters of 1.6 M HCl? Show all of the work needed to solve this probl
Andru [333]

<u>Answer:</u>

For 1: The correct answer is 407.97 grams.

For 2: The correct answer is 76.72 grams.

<u>Explanation:</u>

  • <u>For 1:</u>

We are given the molarity of HCl, to find the moles of HCl, we use the formula:

Molarity=\frac{\text{Moles}{\text{Volume}}

We are given:

Molarity = 1.6 M

Volume = 7.8 L

Putting values in above equation, we get:

1.6mol/L=\frac{\text{Moles of HCl}}{7.8L}\\\\\text{Moles of HCl}=12.48mol

For the given reaction:

Zn(s)+2HCl(aq.)\rightarrow ZnCl_2(aq.)+H_2(g)

By Stoichiometry of the reaction:

2 moles of HCl reacts with 1 mole of zinc metal.

So, 12.48 moles of HCl react with = \frac{1}{2}\times 12.48=6.24mol of Zinc metal.

To calculate the mass of zinc metal, we use the formula:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}    .....(1)

Molar mass of Zinc metal = 65.38 g/mol

6.24=\frac{\text{Mass of zinc metal}}{65.38g/mol}\\\\\text{Mass of zinc metal}=407.97g

  • <u>For 2:</u>

We are given that 298 grams of 83.1 % by mass of iron (II) nitrate solution are present.

So, mass of Iron (II) nitrate solution will be = \frac{83.1}{100}\times 298=247.638g

Molar mass Iron (II) nitrate = 180 g/mol

Putting values in equation 1, we get:

\text{Moles of }Fe(NO_3)_2=\frac{247.638g}{180g/mol}=1.37mol

For the following reaction:

2Al(s)+3Fe(NO_3)_2(aq.)\rightarrow 3Fe(s)+2Al(NO_3)_3(aq.)

By Stoichiometry of the reaction:

3 moles of Fe(NO_3)_2 produces 3 moles of iron metal.

So, 1.37 moles of Fe(NO_3)_2 will produce = \frac{3}{3}\times 1.37=1.37mol of iron metal.

To calculate the mass of zinc metal, we equation 1:

1.37=\frac{\text{Mass of iron metal}}{56g/mol}\\\\\text{Mass of iron metal}=76.72g

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When sodium atoms (Na) and chlorine atoms (CI) join to make
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The two rows form bonds the easiest

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