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Alexxx [7]
4 years ago
10

Convert 4.992×1010 g to each of the following units. B. Mg c. mg D. metric tons

Chemistry
1 answer:
SVETLANKA909090 [29]4 years ago
3 0
I think it is letter D
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tekilochka [14]
I would say A. Because it looks as though it’s the best answer
5 0
3 years ago
Metallic bonding, involving the electron sea model, occurs in ______.
Licemer1 [7]
B, only metals. Metallic bonding always occurs between metals of the same element and involves “a sea of mobile electrons”
4 0
4 years ago
What are two examples of an endothermic reaction and what are two examples of an ectothermic reaction?
natka813 [3]
Exothermic processes: Making ice cubes,formation of snow in clouds


Endothermic processe: Melting ice cubes, evaporation of water
7 0
4 years ago
The Kelvin temperature of a sample of 678 cm3 ammonia gas is doubled, what is<br> the new volume?
DerKrebs [107]

The new pressure will be

1000 L

, rounded to one significant figure.

Explanation:

Boyle's law states that when a gas is held at a constant temperature and mass in a closed container, the volume and pressure vary inversely. The equation to use is

P

1

V

1

=

P

2

V

2

.

Given

V

1

=

200

mL

×

1

L

1000

mL

=

0.2 L

P

1

=

700 mmHg

V

2

=

100

mL

×

1

L

1000

mL

=

0.1 L

Unknown

P

2

Equation

P

1

V

1

=

P

2

V

2

Solution

Rearrange the equation to isolate

P

2

and solve.

P

2

=

P

1

V

1

V

2

P

2

=

(

700

mmHg

×

0.2

L

)

0.1

L

=

1400 L

, which must be rounded to

1000 L

because all of the measurements have only one significant figure.

Answer link

4 0
4 years ago
a regular solid has a length of 28cm. , a width of 16cm. and a total surface area of 1424cm squared. What is the total surface a
Brrunno [24]

Answer:

A = 356 cm²

Explanation:

In this case, you need to use the formula to calculate the area of  regular solid.

This is the following expression:

S = 2LH + 2LW + 2WH

Where:

L: length

W: Width

H: Height

But we do not know the height of the solid. We should calculate it with the given data first:

1424 = 2*28*H + 2*28*16 + 2*16*H

1424 = 56H + 896 + 32H

1424 - 896 = 88H

H = 528/88

<em>H = 6 cm</em>

Now that we know the height we can calculate the area of the other solid. In the other solid the length has been reduced to half, so I will assume that the Width and height is also reduced to half.

L2 = 14 cm

W2 = 8 cm

H2 = 3 cm

Replacing we have:

S = (2*14*3) + (2*14*8) + (2*8*3)

<u>S = 356 cm²</u>

<u>And this should be the total surface area, assuming the width and height is reduced to half too.</u>

If you don't assume it's reduced to half, then use the original values of Width and Height. Doing so, the Surface would be:

S = (2*14*6) + (2*14*16) + (2*6*16)

S = 808 cm²

5 0
3 years ago
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