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Svetach [21]
4 years ago
13

What is the mass number of an atom with 17 protons, 17 electrons, and 20 neutrons?

Chemistry
1 answer:
astra-53 [7]4 years ago
3 0
The mass number of this particular element is 37

An element with 17 protons will ALWAYS be chlorine.
The mass number is found by adding the element’s protons and neutrons.
protons+neutrons=mass number

Here is the math if needed,
17+20=37

Therefore the mass number is 37

I hope this helped!
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We dissolve 2.45 g of sugar in 200.0 g water. what is the mass percent of sugar in the solution?
LiRa [457]

 The  mass percent  of  sugar  in the   solution is 1.225%


      <u><em>calculation</em></u>

mass percent =  [(mass  of solute /mass  of solution ) x  100]

mass   of  solute (  mass of a substance that  dissolve in another substance)

   = 2.45 g

mass  of  solution( mass of a  substance that dissolves  a solute) =200.0 g


Therefore mass  percent = 2.45 g/200.0 g  x 100 = 1.225% of sugar in solution

8 0
3 years ago
Read 2 more answers
NH3 is a weak alkali that does not dissociate fully into its solution. Which of the following is true about NH3?
NemiM [27]

Answer:

Answer:

B. It's dissociation is a reversible reaction

Explanation:

NH3 is a weak alkali that does not dissociate fully into its solution. Only parts of the ammonia takes part in the dissociation process.

NH3 + H20 —> NH4+ + OH-

This dissociation is reversible which means the reactants can be formed from the product gotten from the dissociation

It has a high pH due to its basic nature. It also has a Low concentration of H+ ions and not all the OH- ions are released.

6 0
3 years ago
A drag racing vehicle travels from 0 to 100 mph in 5 seconds north.what is the acceleration
arsen [322]

100mph = 100m/h

= 100m/h * 1 h/3600sec

= 0.028m/sec

= 0.028m/sec /5sec

= 0.055m/sec^2

6 0
4 years ago
What is the chemical formula of diphosphorus monoxide?
Daniel [21]

Answer:

The chemical formula of diphosphorus monoxide is OP2.

I'm not sure if this is correct, but hope it helps! :)

7 0
3 years ago
Select True or False: Hydrogen plays an important role in many industrial processes. The following correctly represents a balanc
Orlov [11]

Answer: False

Explanation:

Since the given equation is not balanced properly.

Since oxygen and hydrogen atoms are not balanced.

There should be 6 H2O (g) molecules and 14 mol H2 (g)

5 0
3 years ago
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