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Genrish500 [490]
3 years ago
11

What property ofwater is determinedby dissolved Ca2+,Mg2+ ions?​

Chemistry
1 answer:
frez [133]3 years ago
8 0

Answer:

The simple definition of water hardness is the amount of dissolved calcium and magnesium in the water. Hard water is high in dissolved minerals, largely calcium and magnesium.

Explanation:

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In Part A, we saw that the theoretical yield of aluminum oxide is 0.700 mol . Calculate the percent yield if the actual yield of
s2008m [1.1K]

Considering the definition of percent yield, the percent yield is 76%.

<h3>Percent yield</h3>

The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.

The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

percent yield=\frac{actual yield}{theorical yield}x100

where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.

<h3>Percent yield in this case</h3>

In this case, you know:

  • actual yield= 0.532 moles
  • theorical yield= 0.700 moles

Replacing in the definition of percent yield:

percent yield=\frac{0.532 moles}{0.700 moles}x100

Solving:

<u><em>percent yield= 76%</em></u>

Finally, the percent yield is 76%.

Learn more about percent yield:

brainly.com/question/14408642

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3 0
2 years ago
2. What element could contain seven protons, eight neutrons, and seven electrons?
MAVERICK [17]

Answer:

nitrogen i hope it helps

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Explanation:

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3 years ago
The periodicity of the properties of elements is chiefly due to the
Lina20 [59]

Answer: option A.

Explanation:

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3 years ago
Ancient cyanobacteria released ______, which assisted in creating the atmosphere as we know it today.
andrey2020 [161]

Answer;

- Oxygen

-Ancient cyanobacteria released oxygen, which assisted in creating the atmosphere as we know it today.

Explanation;

-The oxygen atmosphere that we depend on was generated by numerous cyanobacteria during the Archaean and Proterozoic Eras.

-Cyanobacteria are aquatic and photosynthetic, meaning they live in the water, and can manufacture their own food. During the process of photosynthesis, energy from sunlight is used together with carbon (iv) oxide and water to form organic molecules that serve as nutrients for the organisms and also oxygen gas is released to the atmosphere.

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4 years ago
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If you place rice on top or a speaker, what will happen to the rice when you turn the speaker on?
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Answer:

The rice will move

Explanation:

the sound vibration and waves will cause the rice to move

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