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LUCKY_DIMON [66]
2 years ago
13

PLEASE HELP ASAPP!!!!! PLEASE I’LL TRY TO GIVE BRAINLIEST!

Chemistry
1 answer:
luda_lava [24]2 years ago
6 0

Answer:

Cheap energy

Explanation:

Fossil fuels such as coal, oil, and gas are widely available and are much cheaper than other forms of energy (wind, nuclear, etc.) Fossil fuel products are also quite efficient, as the efficieny of fossil fuels is about 50% (which is actually really good), while solar panels for example are only about 15% efficient.

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What mass of potassium iodide is needed to prepare 5.60 L of a 1.13 M solution
MrMuchimi
Given that the question gives us concentration (M) and volume, we can use these so get moles. remember that Molarity (M)= mol/ Liters, so if we want the moles, then

moles= M x L

moles= 1.13 x 5.60= 6.33 moles KI

now to get the mass in grams, we need the molar mass of potassium iodide (KI) which can be determined using the periodic table and add the masses of each atom.

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4 years ago
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Harlamova29_29 [7]

Answer: Molarity of MgCl_2 in the original sample was 1.96M

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Molarity is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{\text{no of moles}}{\text{Volume in L}}

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Thus molarity of MgCl_2 in the original sample was 1.96M

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