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3 years ago

The atomic number of nitrogen is 7. How many protons,neutrons ,and electrons make up an atom of nitrogen -15

Chemistry

1 answer:

aliya0001 [1]3 years ago

3 0

Answer:

Protons- 7 Electrons- 7 Neutrons- 7

Explanation:

Because protons is the atomic number and that is the same for electrons. Neutrons= Mass - atomic number

Nitrogen will be the same for P, E, N

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Keith_Richards [23]

Answer:

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Explanation:

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beks73 [17]

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A 101.2 ml sample of 1.00 m naoh is mixed with 50.6 ml of 1.00 m h2so4 in a large styrofoam coffee cup; the cup is fitted with a

Murrr4er [49]

The enthalpy change of the reaction when sodium hydroxide and sulfuric acid react can be calculated using the mass of solution, temperature change, and specific heat of water.

The balanced chemical equation for the reaction can be represented as,

$H_{2}SO_{4}(aq) + 2NaOH (aq) ----> Na_{2}SO_{4}(aq) + 2H_{2}O(l)$

Given volume of the solution = 101.2 mL + 50.6 mL = 151.8 mL

Heat of the reaction, q = $m C .$ Δ $T$

m is mass of the solution = 151.8 mL * $\frac{1 g}{1 mL} = 151.8 g$

C is the specific heat of solution = 4.18 $\frac{J}{g. ^{0}C}$

ΔT is the temperature change = $31.50^{0}C - 21.45^{0}C = 10.05^{0}C$

q = $151.8 g (4.18 \frac{J}{g ^{0}C})(10.05^{0}C) = 6377 J$

Moles of NaOH = $101.2 mL * \frac{1L}{1000 mL}*\frac{1.00 mol}{L} = 0.1012 mol$ NaOH

Moles of $H_{2}SO_{4}$ = $50.6 mL * \frac{1 L}{1000 mL} * \frac{1.0 mol}{1 L} = 0.0506 mol H_{2}SO_{4}$

Enthalpy of the reaction = $\frac{6377 J*\frac{1kJ}{1000J}}{0.0506 mol} = 126 kJ/mol$

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3 years ago

Is salt water solution a homogeneous mixture

GuDViN [60]

Answer:

yes, it is a homogeneous mixture because the different parts cannot be seen.

Explanation:

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3 years ago

Read 2 more answers

How many solutions are there in the following equation.

givi [52]

When they ask you for the solution they are usually asking for x. So solve for X.
X=-12 so you only have one solution. so the answer is B

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4 years ago