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3 years ago

8 Sentences describing Nature vs. Nurture. Please Need Help Asap

1 answer:

4 0

Nature is all around us.
Nature provides for us.
The nurture of ethics and integrity.
A mother nurtures her baby after it is brought into the world.

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The relative atomic mass of an element is

balu736 [363]

Answer:

Explanation:

compare it to carbon 12 I believe

3 0

3 years ago

Which of the following indicates the cathode rays has a large charge to mass ratio?

Anna007 [38]

Answer:

Gggg

Explanation:

8 0

3 years ago

When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyanide (HCN), is given off: KCN(aq) + HCl(aq)

maks197457 [2]

<u>Answer:</u> The mass of hydrogen cyanide formed is 0.17 grams

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

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

Given mass of KCN = 0.420 g

Molar mass of KCN = 65.12 g/mol

Putting values in equation 1, we get:

$\text{Moles of KCN}=\frac{0.420g}{65.12g/mol}=0.0064mol$

The given chemical equation follows:

$KCN(aq.)+HCl(aq.)\rightarrow HCN(g)+KCl(aq.)$

As, hydrochloric acid is present in excess. So, it is considered as an excess reagent.

Thus, potassium cyanide is a limiting reagent because it limits the formation of products.

By Stoichiometry of the reaction:

1 mole of potassium cyanide produces 1 mole of hydrogen cyanide.

So, 0.0064 moles of potassium cyanide will produce = $\frac{1}{1}\times 0.00064=0.0064mol$ of hydrogen cyanide

Now, calculating the mass of hydrogen cyanide from equation 1, we get:

Molar mass of HCN = 27.02 g/mol

Moles of HCN = 0.0064 moles

Putting values in equation 1, we get:

$0.0064mol=\frac{\text{Mass of HCN}}{27.02g/mol}\\\\\text{Mass of HCN}=0.17g$

Hence, the mass of hydrogen cyanide formed is 0.17 grams

3 0

4 years ago

Somebody answer please a picture is attached!??

DanielleElmas [232]

9.2 that is the answer

7 0

3 years ago

Calcium carbonates are incorporated into the shells of microscopic marine plants and animals and then participate into the ocean

Anna007 [38]

The answer is: D. Biological precipitation.

Biological precipitation is the deposition of minerals from solution by the agency of organisms .

Deposition is the geological process in which sediments, soil and rocks are added to a landform or land mass.

Ocean sediments originate from numerous sources:

1) biological activity (biogenous).

2) weathering and erosion of the continents (terrigenous/lithogenous).

3) volcanic eruptions (volcanogenous).

4) chemical processes (hydrogenous).

Calcium carbonate (CaCO₃) is made of calcium, carbon and oxygen atoms.

7 0

4 years ago