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zepelin [54]
3 years ago
14

In the chemical formula 3nh4, how many total atoms of hydrogen (h) are there? 1 4 12

Chemistry
1 answer:
Delvig [45]3 years ago
8 0
There is a total of 12 hydrogen atoms
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Which statement is true about the ionic size of the elements in a group as one moves from top to bottom in that group?
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Ionic size increases from top to bottom within the group.

Explanation:

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Calculate the amount of heat necessary to raise the temperature of 135.0 g of water from 50.4°F to 85.0°F. The specific heat of
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Here we have to calculate the heat required to raise the temperature of water from 85.0 ⁰F to 50.4 ⁰F.

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The amount of heat required to raise the temperature can be obtained from the equation H = m×s×(t₂-t₁).

Where H = Heat, s  =specific gravity = 4.184 J/g.⁰C, m = mass = 135.0 g, t₁ (initial temperature) = 50.4 ⁰F or 10.222 ⁰C and t₂ (final temperature) = 85.0⁰F or 29.444 ⁰C.

On plugging the values we get:

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Thus 10857.354 J or 10.857 kJ heat will be needed to raise the temperature.

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