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icang [17]
3 years ago
13

How many cm3 are there in 0.25 dm3?

Chemistry
1 answer:
aniked [119]3 years ago
8 0
250cm3 i think im not sure about it though
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As the deapth of the ocean increases the population of ocean creatures..
Trava [24]

Answer:

( A ) Increases

Explanation:

More room, basically means more creatures. Like in a bedroom, you can only fit amount of people if its small the ocean is like that with depth.

Hopefully this makes sense???

3 0
3 years ago
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Why is 1/t used as a measure of rate of reaction?​
Tpy6a [65]

Answer:

1/t means that the order of reaction is a first order. Meaning that the rate of reaction is directly proportional to reactant concentration. Scientists work with the standard units, therefore 1/t is 1 divide by 1 second.

Explanation:

6 0
3 years ago
If 10.57 g of magnesium reacts completely with 6.96 g of oxygen, what is the percent by mass of oxygen in magnesium oxide? Round
Deffense [45]

Answer:

39.7 %

Explanation:

magnesium + oxygen ⟶ magnesium oxide

   10.57 g         6.96 g               17.53 g

According to the <em>Law of Conservation of Mass</em>, the mass of the product must equal the total mass of the reactants.

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The formula for mass percent is

% by mass = Mass of component/Total mass × 100 %

In this case,

% O = mass of O/mass of MgO × 100 %

Mass of O = 6.96 g

Mass of MgO = 17.53 g

% O = 6.96/17.53 × 100

% O = 0.3970 × 100

% O = 39.7 %

5 0
4 years ago
According to the Periodic Table of Elements, Calcium has:
lana [24]

Answer:

20 protons and 20 electrons

Explanation:

3 0
3 years ago
Explain the difference between a suspension and a solution?
Verdich [7]

Answer: A suspension is a heterogenous mixture containing large particles that will settle on standing. Sand in water is an example of a suspension. A solution is a homogenous mixture of two or more substances where one substance has dissolved the other.

6 0
4 years ago
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