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Nadya [2.5K]
3 years ago
8

If evaporation occurs what will change 0.70 molar solution of CuSO4

Chemistry
1 answer:
faust18 [17]3 years ago
3 0

Answer:

A. Molarity will increase .

Explanation:

Molarity = moles of solute per litre of solution

= moles of solute / volume of solution

If evaporation occurs , volume of solution decreases and moles of solute remains constant . Hence denominator decreases and numerator remains constant .

Hence the molarity increases .

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Antibiotics do not reduce the number of helpful and harmful bacteria in the microbiome.
stira [4]

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false; the purpose of antibiotics is to kill bacteria

Explanation:

7 0
3 years ago
Read 2 more answers
Chlorine is a halogen and has 7 valence electrons, which is represented by crosses on the left
makkiz [27]

There are 2 electrons in the overlapping region.

Chlorine is the second member of the halogen group which are form of family of elements that resemble one another very closely.

The electronic configuration of chlorine shows the arrangement of chlorine electrons within it's atom.

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The overlapping of the orbitals indicates the chemical bond formed by sharing of electrons between atoms called covalent bonding.

To complete it's outer most shell, it will need to share electron with another chlorine atom.

Therefore, there are 2 electrons in the overlapping region.

Learn more here:

brainly.com/question/16396974

3 0
2 years ago
a 100 gram sample of iron ore was found to contain 44g of iron. How many grams of iron are in a 450 gram sample of the ore?
Sphinxa [80]

Answer:

There are 198 grams of iron in a 450-gram sample of the ore.

Explanation:

From the given information:

Given that:

100-gram sample of iron ore is found in 44g of iron.

Thus. the grams of iron that can be found in a 450-gram sample of the iron ore can be computed as follows:

100g of iron ore = 44g of iron

450 gram of iron ore = x g of iron

x(g) of iron = ( 44g of iron × 450 gram of iron ore) / 100g of iron ore

x(g) of iron =  198 grams of iron

Thus, there are 198 grams of iron in a 450-gram sample of the ore.

7 0
2 years ago
If you have 4.72 x 10^24 atoms of Carbon, how many moles of Carbon do you have?
alisha [4.7K]

Answer:

7.84\ \text{moles}

Explanation:

Number of atoms of carbon = 4.72\times 10^{24}

Avogadro's number = 6.022\times 10^{23}\ \text{mol}^{-1}

Here we have to divide the number of atoms by the Avogadro's number

\dfrac{4.72\times 10^{24}}{6.022\times 10^{23}}=7.83792\approx 7.84\ \text{moles}

The moles of carbon are 7.84\ \text{moles}.

8 0
3 years ago
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