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sattari [20]
3 years ago
8

What is the mass number of an element that has 8 protons, 9 neutrons and 7 electrons?

Chemistry
2 answers:
lesya [120]3 years ago
4 0

Answer:

17

Explanation:

mass number = # of protons + # of neutrons

Reil [10]3 years ago
4 0
So the answer to your question will be 16
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The student's lab manual says to mix some of his Na2CO3 solution with an aqueous solution of copper(II) sulfate (CuSO4)
lord [1]

Explanation:

When the student mixed the solution sodium carbonate with solution of copper(II) sulfate ; Copper Hydroxocarbonate , sodium sulfate and carbon dioxide gas was obtained as a products.

The balanced chemical reaction

2Na_2CO_3+2CuSO_4\rightarrow Cu_2(OH)_2CO_3+2Na_2SO_4+CO_2

Where:

Cu_2(OH)_2CO_3 = Copper(II) Hydroxocarbonate

Na_2CO_3 = Sodium carbonate

CuSO_4 = Copper(II) sulfate

Na_2SO_4 = Sodium sulfate

CO_2 = Carbon-dioxide

3 0
3 years ago
A mixture contains O2 at 700. torr pressure, F2 at 500. torr pressure, and Cl2 at 500. torr pressure. What is the total pressure
Softa [21]

You have to use Dalton's law of partial pressure for this question. Dalton's law of partial pressure basically states that the total pressure of the system is all of the partial pressures of the components added together. Therefore to answer the question you just need to add all the patial pressures together meaning that the total pressure would be 700+500+500=1700.

The answer would be 1700 torr.

I hope this helps. Let me know if anything is unclear or if you have any further questions.

3 0
3 years ago
True or false? The molar mass of a gas determines the amount of kinetic energy of the gas.
HACTEHA [7]
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5 0
3 years ago
Which of the following compounds will produce H2O as one of the products when it decomposes?
aivan3 [116]
B) Cu(OH) 2 Is the resulting answer when H20 is decomposed. 
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3 years ago
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Which of the following is NOT a property of metals?
konstantin123 [22]

Answer:

C - can be solids, liquids, or gases

Explanation:

5 0
1 year ago
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