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3 years ago

Based on the name, which substance is a covalent compound?

Chemistry

1 answer:

Sindrei [870]3 years ago

3 0

Answer:

dinitrogen pentoxide

Explanation:

Based on the research, dinitrogen pentoxide is a chemical compound containing only nitrogen and oxygen which is both nonmetal. When two nonmetals or two negatively charged atoms try to form bonds, they always form covalent bonds. Hence, Dinitrogen Pentoxide is not ionic - it is covalent.

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What did Niels Bohr describe electrons in his atomic model

Bess [88]

Neils bohar proposed his atomic model in 1913.

He describe that's electron travel in a circular orbit surrounds the neuclus of an atom.each orbit has quantized energy and size. Energy is transmitted when an electron jumps from one to other orbit near to nucleus.and it absorb energy when it jumbs away from nucleus.he also said that these electrons are restricted to fixed orbits. In excited state of electron, they absorb or emitt photon with specific wavelength.

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3 years ago

Tomato juice has a pH of 4.20. Calculate the [H3O+] and [OH–] in tomato juice.

Free_Kalibri [48]

[H3O+] = 10^(-pH) = 10^(-4.20) = 6.3 x 10^-5 M

pOH = 14 - pH = 14 - 4.20 = 9.80

[OH-] = 10^(-pOH) = 10^(-9.80) = 1.6 x 10^-10 M

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3 years ago

We can change a gas to liquid by_________ the temperature and_________

Tpy6a [65]

Decreasing, Removing

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3 years ago

Which fact below is describing a base?

QveST [7]

7 to 49 10 to 100. 30 Secs. 3. What is the pH value of pure water? 0 3 7 10 ... How do acids taste? bitter sour sweet salty. 30 Secs. 7. How do bases taste? bitter ... 8. Which kind of solution would react with a metal? acidic basic neutral water ... cocoa has a bitter taste. It is most likely which of the following? acid base neutral

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4 years ago

NH4NO3, whose heat of solution is 25.7 kJ/mol, is one substance that can be used in cold pack. If the goal is to decrease the te

makvit [3.9K]

Answer:

There are necessaries 35,2g of NH₄NO₃ per 100,0g of water to decrease the temperature of the solution from 25,0°C to 5,0°C

Explanation:

To decrease the temperature of the solution there are necessaries:

4,184J/g°C×(5,0°C-25,0°C)×(100,0g+X) = -Y

8368J + 83,68J/gX = Y (1)

Where x are grams of NH₄NO₃ you need to add and Y is the energy that you need to decrease the heat.

Also, the energy Y will be:

Y = 25700J/mol× $\frac{1mol}{80,043g}$ X

Y = 321J/g X (2)

Replacing (2) in (1)

8368J + 83,68J/g X = 321J/g X

8363J = 237,32J/gX

X = 35,2g

Thus, there are necessaries 35,2g of NH₄NO₃ per 100,0g of water to decrease the temperature of the solution from 25,0°C to 5,0°C

I hope it helps!

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3 years ago