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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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Question 2 (10 points)
svet-max [94.6K]
4 infiltration percolation!! I think! Correct me if I’m wrong
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3 years ago
Select the correct answer.
Step2247 [10]

Answer:

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Explanation:

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5 0
2 years ago
In order to reduce the exposure to organic solvents like turpentine, some art instructors recommend the students clean brushes a
kykrilka [37]
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To apply this to the current problem, we are told that the brushes are being cleaned with vegetable oil or mineral oil. In this case, the oils are used as solvents. In order for these solvents to be effective, the compounds they are trying to dissolve must be similar in structure and properties to other oils. Therefore, vegetable oil or mineral oil will be most effective in removing oil-based paints, as these will have the similar properties needed to dissolve in the oil solvents.
6 0
3 years ago
Find the mass of 4.5 moles of H3PO4
Contact [7]

Hey there!

H₃PO₄

Find molar mass.

H: 3 x 1.008 = 3.024

P: 1 x 30.97 = 30.97

O: 4 x 16 = 64

---------------------------------

                  97.994 grams

The mass of 1 mole of H₃PO₄ is 97.994 grams.

We have 4.5 moles.

97.994 x 4.5 = 440

The mass of 4.5 moles of H₃PO₄ is 440 grams.

Hope this helps!

6 0
2 years ago
Does this sound good so far
bogdanovich [222]
I think it looks good but some grammars are wrong i suggest trying to put it on grammarly and just check it out its just my suggestion and not doing this for points so you can delete this if it doesnt help
4 0
3 years ago
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