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Firlakuza [10]
3 years ago
12

Has any one done 2020 chemistry paper 1 aqa gcse

Chemistry
1 answer:
Mars2501 [29]3 years ago
7 0

Answer:

what do you mean?

Explanation:

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A radioactive nucleus emits a beta particle, then the parent and daughter nuclei are
Nana76 [90]

Answer:

isobars

Explanation:

How?

  • A radioactive nucleus emits beta particle(Like uranium,radium)
  • So the mass numbers are same for daughter nuclei .
  • They have different atomic numbes .

So they are isobars

3 0
2 years ago
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20g of butanedioic acid were shaken with a mixture of 100 cm3 ether and 100 cm3 water at 298K. After titration with standard sod
zlopas [31]

Answer:

I'm Not Good At Chemistry.

Explanation: It's Hard.

8 0
3 years ago
What is the balance equation for HgO(s)- Hg(l)+O2(g)
artcher [175]
The balanced equation is   2HgO --> 2Hg + O2
4 0
3 years ago
The half-life of 131I is 80 days. How much of a 500.0 mg sample remains after 3 half lives?
I am Lyosha [343]

Answer:

62.5 mg

Explanation:

Just multiply the original amount by  1/2   three times:

500 mg  x  1/2  x  1/2  x  1/2 = 62.5 mg

6 0
2 years ago
Choose all the answers that apply. Which of the following will decrease reaction rate? increase pressure decrease temperature in
zavuch27 [327]

The following quantities will effect the reaction rate as follows:

1. On increasing Concentration of the reactant: Rate of the reaction will increases.

2. On increasing pressure : Increases the rate of reaction to the side where there are fewer number of molecules.

3.On increasing temperature of an endothermic reaction: Increases the rate of reaction

4. On decreasing temperature of an endothermic reaction: Increases the rate of reaction.

So the answer is increase pressure, decrease temperature, increase concentration will increases the rate of the reaction.

6 0
3 years ago
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