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Katyanochek1 [597]

3 years ago

12

Which of the following is true about two neutral atoms of the element gold? (1 point) The nucleus is missing in both. Each has a

different mass. Both have the same properties. Each has a different number of electrons.

1 answer:

klio [65]3 years ago

5 0

i have the same question idk the anwser tho

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In carbon dioxide (CO2), how many grams of oxygen (O) would there be if there are 24 grams of carbon (C)?

Zarrin [17]

Answer:

64g of Oxygen

Explanation:

Firstly, carbon and oxygen react to form CO2 as follows;

C + O2 => CO2

According to the equation, one mole of C reacts with one mole of O2 to give one mole of CO2

Since molar mass of C= 12g/mol, O= 16g/mol

One mole of (C) contains 12g

One mole of O2 contains 16(2) = 32g

Hence, If there are 24g of C, there would be 24 × 32 / 12

= 768/12

= 64g

Hence, there would be 64g of oxygen if there are 24g of Carbon

6 0

4 years ago

Starting with the water in the ocean place the below steps in the correct order showing how water moves through this cycle

ruslelena [56]

Answer:

C, A, D and B

Explanation:

Water evaporates from the surface of the oceans leaving behind salts. As water vapor rises, it collects and is stored in clouds.

As water cools in the clouds, condensation occurs. Condensation is when gases turn back into liquids.

Condensation creates precipitation. Precipitation includes rain, snow, hail and sleet. The precipitation allows the water to return again to the Earth's surface.

When precipitation lands on land, the water can sink into the ground to become part of our underground water reserves, also known as groundwater.

7 0

3 years ago

How much energy would be absorbed as heat by 75 g of iron when heated from 295 k to 301 k?

Katen [24]

Answer:

$Q=202.5J$

Explanation:

Hello,

In this case, the increase in the temperature involves the addition of heat that is defined in terms of mass, heat capacity and temperature:

$Q=mCp(T_2-T_1)$

In this case, the heat capacity of iron is 0.450 J/(g*K), thus the heat results:

$Q=75g*0.450\frac{J}{g*K}*(301-295)K\\\\Q=202.5J$

In such a way, since the temperature is increased heat is added, that is why it is positive.

Best regards.

4 0

4 years ago

Read 2 more answers

A population of snails lives in a large field. As the size of the population grows, individual organisms on one side of the fiel

Karolina [17]

Answer:

I believe that the answer is c

Explanation:

The snails will split hope this helps! <3

5 0

3 years ago

Read 2 more answers

What is the mole fraction of sodium chloride in solution that is 13. 0 y mass sodium chloride and that has a density of 1. 10 g/

lyudmila [28]

Mole fraction is the ratio of the constituent moles to the total constituents. The mole fraction of sodium chloride is 0.0443.

<h3>What is a mole fraction?</h3>

A mole fraction is the proportion of the moles of the component in a total component present.

In 100 gm of solution 13.0 5 means, there is 13.0 gm of sodium chloride present. The mass of water is calculated as,

100 - 13.0 = 87.0 gm

Moles of sodium chloride is calculated as:

$\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass} \\\\&= \dfrac{13}{58}\\\\&= 0.224 \;\rm moles\end{aligned}$

Moles of water are calculated as:

$\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass} \\\\&= \dfrac{87}{18}\\\\&= 4.83\;\rm moles\end{aligned}$

Now, moles fraction is calculated by dividing moles of sodium chloride by total moles as,

$\begin{aligned} \text{Mole fraction of NaCl} &= \dfrac{0.224}{0.224 + 4.83}\\\\&= 0.0443\end{aligned}$

Therefore, the mole fraction of sodium chloride is 0.0443.

Learn more about mole fraction here:

brainly.com/question/8076655

#SPJ4

7 0

2 years ago