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aleksley [76]
2 years ago
15

All the mixture are harmful for us. is this statement true? justify with two examples​

Chemistry
2 answers:
Natasha2012 [34]2 years ago
8 0

Answer:

no some of mixture are useful

Explanation:

h2 and o2 to form water

Taya2010 [7]2 years ago
3 0

Answer:

no.it is false.some are useful.like mixture of h2 and O 2 to form water.

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If two gases a and b in separate 1 liter containers
Anton [14]

The pressure exerted when both gases are put together in a single 1 liter container is 5 atm.

<h3>What is pressure?</h3>

Pressure is the force exerted by any object on another object.

Given that, a and b separate 1 liter containers and exert pressure of 2 atm and 3 atm respectively.

When both gases a and b exert together, the pressure then

2 atm + 3 atm = 5 atm.

Thus, the pressure exerted when both gases are put together in a single 1 liter container is 5 atm.

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7 0
1 year ago
If 156 grams of chromium react with an excess of oxygen, as shown in the balanced chemical equation below, how many grams of chr
Sunny_sXe [5.5K]

Answer:

=759.95 grams.

Explanation:

The molar mass of chromium is 51.9961 g/mol

Therefore the number of moles of chromium in 156 grams is:

Number of moles =mass/RAM

=156g/51.9961g/mol

=3 moles.

From the equation provided, 3 moles of chromium metal produce 2 moles of Chromium oxide.

Therefore 3 moles of chromium produce:

(3×2)/4 moles =1.5 moles of chromium oxide.

I mole of chromium oxide has a mass of 151.99 g

Thus 1.5 moles= 1.5mole ×151.99 g/mol

=759.95 grams.

3 0
2 years ago
Magnesium and oxygen are likely to form a covalent bond between them. True or false??
zalisa [80]
False is the answer.
3 0
3 years ago
Round each number to four significant figures
ira [324]

Answer:

a.

84,791 » 8479

b.

256.75 » 256.8

c.

431,801 » 4318

d.

0.00078100 » 0.0007810

Explanation:

.

5 0
2 years ago
3. Which of the following most likely describes an isotope? *
Nimfa-mama [501]
I think the answer might be B but i’m not positive
5 0
3 years ago
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