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3 years ago

Which of these did your answer include?

Chemistry

1 answer:

sveticcg [70]3 years ago

8 0

The oxygen atom has a partial negative charge and the Hydrogen atoms have a partial positive charge

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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

Which of these elements does not exist as a diatomic molecule?

madam [21]

Answer:

Explanation:

Noble gas, Unreactive therefore does not exist as a diatomic molecule

3 0

3 years ago

Out of milk and water which would be the base and the acid??

Triss [41]

<span>It's easy to get confused about whether milk is an acid or a base, especially when you consider that some people drink milk or take calcium to treat an acidic stomach. Actually, milk has a pH of around 6.5 to 6.7, which makes it slightly acidic. Some sources cite milk as being neutral since it is so close to the neutral pH of 7.0. Milk contains lactic acid, which is a hydrogen donor or proton donor.</span>

5 0

3 years ago

Read 2 more answers

Does temperature stay the same when heat energy increases?

son4ous [18]

Answer:

More energy is required to raise its temperature. Therefore, temperature does not stay the same when heat energy increases.

6 0

3 years ago

Read 2 more answers

Suppose you wanted to dissolve 40.0 g NaOH in enough H2O to make 6.00 dm3 of solution

dezoksy [38]

Molarity of solution = 1.6 M

<h3>Further explanation</h3>

Given

40 g NaOH

6 L solution

Required

Steps to solve the problem of molarity

Solution

No additional information about the question.

If you want to make the solution above, then we just need to put the existing NaOH (40 g) into 6 L of water, then do the stirring (in a warm temperature above the hot plate will speed up the NaOH dissolving process)

But if you want to know the molarity of a solution, then