3 years ago

What is the mass number of oxygen atom with 7 neutrons?

1 answer:

7 0

Oxygen has 8 protons
8 + 7 = 15
This isoptope is O-15

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ra1l [238]

Answer:

Dissolve 226 g of KCl in enough water to make 1.5 L of solution

Explanation:

1. Calculate the moles of KCl needed

$n = \text{1.5 L} \times \dfrac{\text{2 mol}}{\text{1 L}}= \text{3.0 mol}$

2. Calculate the mass of KCl

$m = \text{3.0 mol} \times \dfrac{\text{74.55 g}}{\text{1 mol}}= \text{224 g}$

3. Prepare the solution

Measure out 224 g of KCl.
Dissolve the KCl in a few hundred millilitres of distilled water.
Add enough water to make 1.5 L of solution. Mix thoroughly to get a uniform solution.

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Daniel [21]

Answer: the correct answer is : too many fish caused an imbalance in the ecosystem, so the food web was affected.

Explanation:

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3 years ago

Lisa [10]

Answer:

It would be nothing. Quite literally nothing. No Oxygen, no dirt, no anything.

Explanation:

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Snezhnost [94]

Your answer is B. It gets energy from the Sun.
Have a great day :)

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ehidna [41]

4Ag + 2H2S + O2 -> 2Ag2S + 2H20 i’m pretty sure that’s correct

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