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Brrunno [24]
3 years ago
11

1. Carbon is important because:

Chemistry
2 answers:
TEA [102]3 years ago
7 0

the answer is b. :)))))))))))))

nikklg [1K]3 years ago
3 0

Answer:

B

Explanation:

All organic material has carbon.

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A reaction produces 0.755 mol of H2O. How many molecules of water are produced?
Fynjy0 [20]

Answer:

4.55 * 10^23 molecules

Explanation:

This is a conversion problem. We know that one mole has 6.022 *10^23 particles or molecules so we can use this as a conversion factor.

0.755 mol ( 6.022*10^23 molecules/ 1 mol)

=4.55*10^23 molecules

7 0
3 years ago
A separatory funnel contains the two immiscible liquids water and toluene. Use the given densities to determine which layer is o
damaskus [11]

Answer:

  • Top layer Toluene
  • Bottom layer Water

Explanation:

When two non-miscible liquids are put together, the one with the higher density will be on the bottom, while the one with the lower density will be on top.

Meaning that in this problem's case toluene would be on the top layer and water in the bottom layer.

7 0
2 years ago
A 28.5 gram piece of iron is added to a graduated cylinder containing 45.5 mL of water. The water in the cylinder rises to the 4
yan [13]

7.91 g/ml is the density of the iron piece of 28.5 gms.

Explanation:

The density of a substance is defined as the volume it occupies.  It tells the matter present in a substance.

The density is mass per unit volume and is denoted by p.

The formula for density is given by:

density (p) = \frac{mass}{volume}

Data given is :

mass= 28.5 grams

V1 = 45.5 ml

V2= 49.1 ml

The initial volume of water was 45.5 ml, when iron piece of 28.5 grams was added the final volume was 49.1 ml.

Putting the values in the equation of density

p = \frac{28.5}{49.1-45.5}

p = 7.91 g/ml

Since iron is a dense material it will occupy less volume

4 0
3 years ago
Which type of circuit has a string of lights and one light goes out but the others stay lit
kondor19780726 [428]

Answer:parrallel

Explanation:

8 0
2 years ago
What direction do the plates have to move in order for an earthquake to occur?
Bess [88]
they would be pushing together
4 0
3 years ago
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