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Assoli18 [71]
3 years ago
13

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Chemistry
1 answer:
Pachacha [2.7K]3 years ago
6 0

Answer:

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Explanation:

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If a radius of a circle is 7 cm, what is its perimeter?<br>please explain in full detail...​
storchak [24]

Explanation:

perimeter of circle - 2pieR

- pie D

radius R - 7 cm

perimeter- 2×22/7×7 (7 and 7 got cancalled)

2×22

44 cm

7 0
4 years ago
Iodine, I2, is a solid at room temperature but sublimes (converts from a solid into a gas) when warmed. What is the temperature
Finger [1]

Answer:

T = 3.75 K

Explanation:

As we know

PV = nRT

R =8.3144598 J. mol-1. K-1

P = 0.562 atm

V = 83.3 mL

moles in 0.392 g of I2 = 0.392/mass of I2 = 0.392 grams/253.8089 g/mol = 0.0015 moles

Substituting the given values, we get

0.562 atm * 83.3 *10^-3 L = 0.0015 moles * 8.3144598 J. mol-1. K-1 * T

T = 3.75 K

3 0
3 years ago
What are the roles of producers,consumers, and decomposers in an ecosystem?
scoundrel [369]
The producers of an ecosystem make energy available to all the other living parts of an ecosystems. Consumers like humans eat the food that producers like plants made decomposers decompose dead plants and animals when they die like bacteria is a decomposer
5 0
3 years ago
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Which element is located in period 4?
Lena [83]

Answer:

i beleive iron

Explanation:

6 0
3 years ago
What is one of the ways a fission reaction can get out of control? when there are too many neutrons when the neutrons are slowed
Juliette [100K]

Out of the following given choices;

A) when there are too many neutrons

B) when the neutrons are slowed down

C) when there is a chain reaction

D) when there is critical mass

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6 0
3 years ago
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