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nika2105 [10]
2 years ago
13

One example of a chemical change is

Chemistry
2 answers:
ikadub [295]2 years ago
8 0
Baking cookies is a chemical change
ser-zykov [4K]2 years ago
6 0

Answer:

When you burn a paper or cooking food

Explanation:

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A colloid in which a liquid is dispersed in a solid is called a(n)
Svetach [21]

Answer:

GEL

Explanation:

8 0
2 years ago
1. The solubility of AgNO3 at 20°C is 222.0g AgNO3/100g H2O. What mass of AgNO3 can be dissolved in 250 g of water at 20°C? Reca
neonofarm [45]

Answer :

(1) The mass of silver nitrate is, 555 g

(2) The solubility of the gas will be, 0.433 g/L

<u>Solution for Part 1 :</u>

From the given data we conclude that

In 100 gram of water, the amount of silver nitrate = 222 g

In 250 gram of water, the amount of silver nitrate = \frac{222}{100}\times 250=555g

Therefore, the mass of silver nitrate is, 555 g

<u>Solution for Part 2 :</u>

Formula used : S_1P_1=S_2P_2     (at constant temperature)

where,

S_1 = initial solubility of methane gas = 0.026 g/L

S_2 = final solubility of methane gas

P_1 = initial pressure of methane gas = 1 atm

P_2 = final pressure of methane gas = 0.06 atm

Now put all the given values in the above formula, we get the solubility of methane gas.

(0.026g/L)\times (1atm)=S_2\times (0.06atm)

S_2=0.433g/L

Therefore, the solubility of the gas will be, 0.433 g/L

5 0
3 years ago
The Half-Life of Pa-234 is 6.75 hours. How much (what fraction) of a sample of this isotope remains after 20.25 hours?
Grace [21]
So in one hour half the amount remains (that's what half life means). In two hours 1/4 (or half of half) would remain and in three hours 1/8 would remain.
So the answer is 1/8
6 0
3 years ago
The function of the heat exchanger in a nuclear reactor is to...
Ganezh [65]

Answer:

cool the tractor water system

4 0
2 years ago
What is difference in reaction of O2 with metal and nonmetal?​
aksik [14]

Answer:

Metal more reactive than non metal

4 0
3 years ago
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