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3 years ago

How many grams of carbon are In 25 g of CO2?

Chemistry

1 answer:

djverab [1.8K]3 years ago

3 0

Answer: almost 7g

Explanation: 25 grams of carbon dioxide contains 6.818 grams of carbon.

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During a synthesis reaction, 2.4 grams of magnesium reacted with 8.0 grams of oxygen. What is the maximum amount of magnesium ox

natali 33 [55]

Answer: The maximum amount of magnesium oxide produced during the reaction can be, 3.9 grams.

Explanation : Given,

Mass of $Mg$ = 2.4 g

Mass of $O_2$ = 8.0 g

Molar mass of $Mg$ = 24.3 g/mol

Molar mass of $O_2$ = 31.9 g/mol

First we have to calculate the moles of $Mg$ and $O_2$ .

$\text{Moles of }Mg=\frac{\text{Given mass }Mg}{\text{Molar mass }Mg}$

$\text{Moles of }Mg=\frac{2.4g}{24.3g/mol}=0.099mol$

and,

$\text{Moles of }O_2=\frac{\text{Given mass }O_2}{\text{Molar mass }O_2}$

$\text{Moles of }O_2=\frac{8.0g}{31.9g/mol}=0.25mol$

Now we have to calculate the limiting and excess reagent.

The balanced chemical equation is:

$2Mg+O_2\rightarrow 2MgO$

From the balanced reaction we conclude that

As, 2 mole of $Mg$ react with 1 mole of $O_2$

So, 0.099 moles of $Mg$ react with $\frac{0.099}{2}=0.049$ moles of $O_2$

From this we conclude that, $O_2$ is an excess reagent because the given moles are greater than the required moles and $Mg$ is a limiting reagent and it limits the formation of product.

Now we have to calculate the moles of $MgO$

From the reaction, we conclude that

As, 2 mole of $Mg$ react to give 2 mole of $MgO$

So, 0.099 mole of $Mg$ react to give 0.099 mole of $MgO$

Now we have to calculate the mass of $MgO$

$\text{ Mass of }MgO=\text{ Moles of }MgO\times \text{ Molar mass of }MgO$

Molar mass of $MgO$ = 40.3 g/mole

$\text{ Mass of }MgO=(0.099moles)\times (40.3g/mole)=3.9g$

Therefore, the maximum amount of magnesium oxide produced during the reaction can be, 3.9 grams.

7 0

3 years ago

Why must the surface of a mineral be different color than the interior of the mineral?

sergey [27]

Surface can be other colors due to oxidation

5 0

3 years ago

A mixture of nitrogen gas and oxygen gas has a total pressure of l.13 atm. If the partial pressure of oxygen is 0.43 atm, what i

Vladimir [108]

C
0.70

I hope this is help, I’m so so sorry if I’m incorrect

8 0

3 years ago

Read 2 more answers

Drag the handle on the left and adjust the length of the box to 5 nm. (Because no other dimensions of the box change, its length

kvv77 [185]

Answer:

Length (nm) Pressure (atm)

5.0 11.7

6.0 9.8

7.0 8.4

8.0 7.2

9.0 6.6

10.0 5.8

Explanation:

This is also PLATOS answer!!

7 0

3 years ago

In 1993 the Minnesota Department of Health set a health risk limit for chloroform in groundwater of 60.0 g/L Suppose an analytic

tangare [24]

Answer:

4.74 × 10³ mg

Explanation:

Given data

Health risk limit for chloroform in groundwater: 60.0 g/L

Volume of the sample of groundwater: 79.0 mL = 79.0 × 10⁻³ L

The maximum mass of chloroform that there could be in the sample of groundwater to meet the standards are:

79.0 × 10⁻³ L × 60.0 g/L = 4.74 g

1 gram is equal to 10³ milligrams. Then,

4.74 g × (10³ mg/1 g) = 4.74 × 10³ mg

6 0

3 years ago