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Ber [7]
3 years ago
7

Distinguish a substance from a mixture. give two examples of each

Chemistry
1 answer:
amm18123 years ago
4 0
substance is matter of particular or definite chemical constitution ex: iron, methane
mixture are two or more substances that have been combined to retain their individual chemical characteristics ex: salt water, cola
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5250000 determine the number of significant figures
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Answer:

3 significant figures

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3 years ago
Give an explanation of how an electrical current is produced
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Electric current can be generated by moving a metal wire through a magnetic field. It is also different than static electricity, which is the accumulation of charges on a surface. <u>Electric generators rotate a coil</u> of wires through a magnetic field.

8 0
2 years ago
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If I have a 50.0 liter container that holds 45 moles of gas at a
Darina [25.2K]
V= 50. L n=45 mol T= 200°C = 473k P=?

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3 years ago
How many grams of hydrogen are needed to react with 1.40 g of nitrogen to produce ammonia?
vazorg [7]

Answer:

Write a balanced chemical reaction:

N2 + 3H2 ==> 2NH3

Looking at the mole ratios in this balanced equation you can see it takes 3 moles H2 to make 2 moles NH3.  So, next calculate the moles of NH3 represented by 1.80 g and then convert to moles of H2 needed:

moles of NH3 = 1.80 g x 1 mole/17 g = 0.106 moles NH3

Moles H2 needed = 0.106 moles NH3 x 3 moles H2/2 moles NH3 = 0.159 moles H2 needed

Grams H2 needed = 0.159 moles x 2 g/mole = 0.318 grams H2 needed

Explanation:

8 0
3 years ago
What distance in kilometers can you drive if your car gets 14.00 kilometers per liter and you have 35.00 liters of gas?​
agasfer [191]

2.5 km is the distance you can travel if a car gets 14 kilometers per liter and have 35 liters of gas.

Total distance traveled in 1 liter = 14 km

Total gas in the car = 35 liters

We have to find how much distance can be covered in in35 liters of gas.

Distance is the length of the path traveled between two points. It is the total movement of an object in a direction. It measures length.

Distance = 35/14

Or, distance = 2.5 km

Therefore, the total distance that can be covered by a car in 35 liters of gas is 2.5 km.

To learn more about distance, visit: brainly.com/question/15172156

#SPJ9

7 0
1 year ago
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