3 years ago

Potassium has a mass number of 40 and an atomic number of 19. how many protons does it have?

1 answer:

6 0

19. The atomic number is the same as protons and electrons unless it have a - or a + charge the electrons are going to change

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2LiOH + HNO3 → 2LINO3 + H2O<br> 1<br> Is it balanced

LiRa [457]

Answer:

no need to balance.....

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2 years ago

A sample of helium has a volume of 50.00 L at STP. How many helium atoms are in the sample? Show work

Setler79 [48]

Answer:

Explanation:

molar volume at STP=22.4 L

given volume=50.0 L

number of moles=given volume/molar volume

number of moles=50.0/22.4

number of moles=2.2

1 mole of helium =6.023*10^23 atoms

2.2 moles of helium =6.023*10^23*2.2=1.3*10^24

therefore 50.0 L of helium contain 1.33*10^24 atoms

4 0

3 years ago

Write a net ionic equation to show that acetylsalicylic acid (aspirin), hc9h7o4, behaves as a brÃ¸nsted-lowry acid in water.

Thepotemich [5.8K]

By definition, Bronsted-Lowry acid is a proton donor in the acid-base neutralization reaction. When a weak acid like acetylsalicylic acid is reacted with water, the water here acts as the Bronsted-Lowry base. This is possible because water has properties of amphoterism - can act as an acid or base. In this case, acetylsalicylic acid would have to donate its H+ atom to water, so that it would yield a hydronium ion, H₃O⁺. The complete net ionic reaction is shown in the picture.

So, in the reaction, the products yield are the acetylsalicylate ion and the hydronium ion.