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3 years ago

How are elements and compounds different?

Chemistry

1 answer:

Black_prince [1.1K]3 years ago

7 0

Answer:

A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom.

Explanation:

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What is the mass of an object that has a density of 0.500 g/cm3 and a volume of 5.00 mL?

attashe74 [19]

Answer:

<h2>The answer is 2.5 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

density = 0.5 g/cm³

1 mL = 1 cm³

5 mL = 5 cm³

volume = 5 cm³

The mass is

mass = 0.5 × 5

We have the final answer as

Hope this helps you

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2 years ago

How would u describe the shape of a big drop of water. Thanks everyone for your help

Furkat [3]

Answer:

It is a semi circle with a triangle on top

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2 years ago

If I only want to make 500 mL of a 1.25% bleach solution, how many milliliters of bleach would I need? Show your work or explain

kiruha [24]

Answer:

6.25 mL

Explanation:

1.25% of 500 mL is ...

0.0125×(500 mL) = 6.25 mL

Since 1.25% of the 500 mL of solution is bleach, that's how much you need. That amount is 6.25 mL.

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2 years ago

Which is denser air or carbon dioxide

Mrrafil [7]

Carbon dioxide I googled it soo

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3 years ago

Water flows over Niagara Falls at the average rate of 2,400,000 kg/s, and the average height of the falls is about 50 m. Knowing

Andre45 [30]

Answer:

Power, $P=1.176\times 10^9\ W$

No of bulbs = 78400000

Explanation:

We have,

Water flows over Niagara Falls at the average rate of 2,400,000 kg/s, it mean it is mass per unit time i.e. m/t.

It falls from a height of 50 m

The gravitational potential energy of falling water is given by :

P = mgh

Power is equal to the work done divided by time taken. So,

$P=\dfrac{W}{t}\\\\P=\dfrac{mgh}{t}\\\\P=\dfrac{m}{t}\times gh$

So,

$P=2400000\times 9.8\times 50\\\\P=1.176\times 10^9\ W$

Let there are n bulbs that could power 15 W LED. It can be calculated by dividing the power by 15. So,

$n=\dfrac{1.176\times 10^9}{15}\\\\n=78400000\ \text{bulbs}$

It means that the number of bulbs are 78400000.

3 0

3 years ago

How are elements and compounds different?​

How are elements and compounds different?