2 years ago

A) If an atom has 13 protons how many electrons will it have justify your answer

Chemistry

1 answer:

gogolik [260]2 years ago

8 0

Answer:

Explanation:

because the number of protons and electrons in the atom are the same

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the experiment measurements might been thrown off

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How many grams of water would require 2200 joules of heat to raise it’s temperature from 34 degrees Celsius to 100 degrees celsi

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Answer:

Mass, m = 7.97 grams

Explanation:

We have,

Initial temperature was 34 degrees Celsius

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The heat produced due to change in temperature is given by :

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m is mass of water in grams

$m=\dfrac{Q}{c(T_f-T_i)}\\\\m=\dfrac{2200}{4.18\times (100-34)}\\\\m=7.97\ g$

So, 7.97 grams of water is required to produce heat of 2200 joules.

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A helium balloon contains 16.9 L of helium at STP. How many atoms of helium are in the balloon

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What is the net ionic equation for the reaction that occurs when aqueous solutions of naoh and hno3 are mixed?

likoan [24]

Answer:-

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Explanation:-

The chemical equation is NaOH + HNO3 --> NaNO3 + H2O

Now for the ionic compounds

HNO3 --> H+ + NO3 -

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NaNO3 --> Na+ + NO3-

Water being covalent will remain as H2O,

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HNO3 + NaOH--> NaNO3 + H2O

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Crossing out common terms

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