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svetlana [45]
3 years ago
11

Spontaneous decay of certain elements in nature occurs because these elements have

Chemistry
2 answers:
Novosadov [1.4K]3 years ago
8 0

Answer:

B.

Explanation:

The neutron/proton ratio for a certain element must fall within a certain range for the element to be stable. That’s why some isotopes of an element are stable and others are radioactive.

Aneli [31]3 years ago
3 0

Answer:

The answer is B.

Explanation:

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Sublimation is snow or ice changing to a gas without melting. What must happen to the molecules for this to happen?
expeople1 [14]

Answer:Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage. For those of us interested in the water cycle, sublimation is most often used to describe the process of snow and ice changing into water vapor in the air without first melting into water.

Explanation:

6 0
3 years ago
1. Drug dependence from drug abuse​
tia_tia [17]

Answer:

✅

Explanation:

DON'T USE DRUGS BECAUSE IT IS GOING DEATH

4 0
3 years ago
What is the concentration of Htions at a pH = 11?
Lostsunrise [7]
Answer:
a) 1 x 10^-11 mol/L
b) 1 x 10^-6 mol/L
c) 1 x 10^-5 fewer H+ ions

Explanation

pH stands for Power of Hydrogen, the more acidic a substance is, the more H+ ions it has rendering the substance acidic. a pH of 1 means the concentration of H+ ions is 1 x 10^-1. A pH of 7 means the concentration of H+ ions is 1 x 10^-7 and so on.

10^-11 has 10^-5 more H+ ions than 10^-6

Hope this helps :)
5 0
3 years ago
18. What is the percent by mass sugar of a solution made by dissolving 12.45 grams of sugar in 100 grams of water?
Fantom [35]

The percent by mass sugar of a solution : 11.07%

<h3>Further explanation</h3>

Given

mass of sugar = 12.45 g

mass of water = 100 g

Required

The percent by mass

Solution

Mass of solution :

\tt mass~sugar+mass~water=12.45+100=112.45~g

Percent mass of sugar :

\tt \%mass=\dfrac{mass~sugar}{mass~solution}\times 100\%\\\\\%mass=\dfrac{12.45}{112.45}\times 100\%=11.07\%

6 0
3 years ago
Can you please answer Question 9 please
MissTica
The answer is C because I kno
6 0
3 years ago
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