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Feliz [49]
2 years ago
5

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 15.4 u.

Chemistry
1 answer:
mixas84 [53]2 years ago
8 0

Answer:

N, B, Be, C

Explanation:

N (Nitrogen) has 14.0067 B (Boron) has 10.81 Be (Beryllium) has 9 and C (Carbon) has 12

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Josie observed that when water is boiled in an open beaker it completely disappears, leaving the beaker dry. What can Josie conc
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That when water is boiled in a open beaker and it disappears that it evaporates into the air
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3 years ago
4 NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)
Mariulka [41]

Answer:

0.9 moles of water

Explanation:

Use mole ratios:

5 : 6

divide by 5 on both sides

1 : 1.2

multiply by 0.75 on both sides

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So the result is 0.9 moles of water

(Please correct me if I'm wrong)

5 0
2 years ago
EXPLAIN how to identify the reducing agent in a reaction of magnesium with oxygen
Alina [70]

Explanation:

Mg+O>MgO

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Mg(2+)and O(2-)

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8 0
3 years ago
Increasing temperature makes a
LenKa [72]

Answer:

High temperature increases the number of high energy collisions

Explanation:

Increasing the temperature a reaction takes place at increases the rate of reaction. At higher temperatures, particles can collide more often and with more energy, which makes the reaction take place more quickly.

5 0
2 years ago
Is the following nuclear equation balanced?<br><br> No<br> Yes
fredd [130]

Answer:

Yes.

The nuclear equation {226/88 Ra → 222/26 Rn + 4/2 He} is balanced. As we know that an alpha particle is identical to a helium atom. This implies that if an alpha particle is eliminated from an atom's nucleus, an atomic number of 2 and a mass number of 4 is lost.

Therefore, the equation will be reduced to:

226 - 4 = 222

88 - 2 = 86

Hence, the equation is balanced.

Explanation:

7 0
3 years ago
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