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3 years ago

Sodium oxide contains Na+ ions and O2- ions. Give the formula of sodium oxide

Chemistry

1 answer:

mixer [17]3 years ago

8 0

To be honest, I learned this in school so I'll tell you XD

The formula of sodium oxide is Na2O

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Add the polynomials (7x^3-2x^2-12)+(3x^3-8x^2+10x)

laiz [17]

Answer:

10 x ^3 − 10 x ^2 + 10 x − 12

Explanation:

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3 years ago

What is the percent composition by mass of hydrogen in nh4hco3

Simora [160]

<u>Answer:</u> The percent composition by mass of hydrogen in given compound is 6.33 %

<u>Explanation:</u>

We are given:

A chemical compound having chemical formula of $NH_4HCO_3$

It is made up by the combination of 1 nitrogen atom, 5 hydrogen atoms, 1 carbon atom and 3 oxygen atoms

To calculate the percentage composition by mass of hydrogen in the compound, we use the equation:

$\%\text{ composition of Hydrogen}=\frac{\text{Mass of hydrogen}}{\text{Mass of compound}}\times 100$

Mass of compound = $[(1\times 14)+(5\times 1)+(1\times 12)+(3\times 16)]=79g/mol$

Mass of hydrogen = $(5\times 1)=5g/mol$

Putting values in above equation, we get:

$\%\text{ composition of Hydrogen}=\frac{5g/mol}{79g/mol}\times 100=6.33\%$

Hence, the percent composition by mass of hydrogen in given compound is 6.33 %

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3 years ago

What is another name for the acid dissociation constant?

sveticcg [70]

A. Ionization constant

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3 years ago

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Most continuous spectra are examples of what we also call thermal radiation spectra. Why do we call them "thermal" spectra?

lisov135 [29]

Answer:

They are emitted from heated objects

Explanation:

When objects are heated, they emit light at all wavelengths thereby forming a continuous spectrum. Electromagnetic radiation of all wavelengths and colours are usually represented in such spectrum. A thermal spectrum is quite a simple spectrum since it depends on temperature.

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3 years ago

8. What type of reaction is this:

arsen [322]

Answer:

The reaction mentioned in the question is a decomposition reaction.

Explanation:

Decomposition reaction is a specific type of chemical reaction in which the reactant molecule undergo break down to generate its respective products.

NaCl ⇒ Na + Cl2

In the above reaction sodium chloride(NaCl) undergo decomposition or break down to generate Sodium(Na) and chlorine gas(Cl2).

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3 years ago

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