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mixer [17]
3 years ago
14

Which of the following isotopes is NOT considered to be a major threat to human health from nuclear fallout? a. strontium-90 b.

hydrogen-2 c. iodine-131 d. cesium-137
Chemistry
1 answer:
Nat2105 [25]3 years ago
4 0
Ohhh it’s A) strontium
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Make a plan to partition the mixture of iron chips, water and alcohol.
DanielleElmas [232]

Answer:

water into drop alcohol

Explanation:

alcohol first burn

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3 years ago
Nitrogen reacts with a metal to form a compound in which there are three atoms of the metal for each atom of nitrogen. if 1.486
trapecia [35]

We are given that:

1 atom N = 3 atom of the metal

1 mol N = 3 mol of the metal

 

First let us convert the given nitrogen into number of moles:

moles N = 1 g / (14 g / mol)

moles N = 0.071 mol

 

Therefore the atomic or molar mass of the metal is:

molar mass = 1.486 g / (3 * 0.071 mol)

<span>molar mass = 6.93 g / mol</span>

5 0
3 years ago
WHICH RIBBON WOULD BE CONSIDERED THE SENIOR RIBBON AND WOULD BE PLACED TO THE LEFT NEAR YOUR HEART?
Pie

Answer:

?

Explanation:

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3 years ago
The law of conservation of energy describes the total amount of energy in a system. Which statements explain why the conservatio
Advocard [28]
It is a statement of fact. explains how energy is produced, and describes the behavior of energy.
3 0
4 years ago
9. Calculate the specific heat capacity of titanium if a 43.56 g sample absorbs 0.476 kJ as its temperature changes from 20.5 oC
Shalnov [3]

Answer:

c = 0.528 J/g.°C

Explanation:

Given data:

Mass of titanium = 43.56 g

Heat absorbed = 0.476 KJ  = 476 j

Initial temperature = 20.5°C

Final temperature = 41.2°C

Specific heat capacity = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 41.2°C - 20.5°C

ΔT = 20.7 °C

476 J = 43.56 g × c × 20.7 °C

476 J = 901.692 g.°C × c

c = 476 J / 901.692 g.°C

c = 0.528 J/g.°C  

8 0
3 years ago
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