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rjkz [21]
3 years ago
13

Which of the following statements are true? (There are 2)

Chemistry
2 answers:
Shalnov [3]3 years ago
4 0

Answer:

A and B

Explanation:

the other two make no sense at all

krek1111 [17]3 years ago
4 0
The answers are
A compass needle is affected be Earths magnetic field.

A magnetic field flows through the inside of a magnet
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Who’s is a difference between the focus of a nuclear engineer and the job of a nuclear scientist
yawa3891 [41]

The primary difference between them is what they work with and what their goals are. Chemical engineers research and design production processes for things like food or gasoline while nuclear engineers focus on ways to harness and use radiation and nuclear energy.

4 0
3 years ago
How many kilograms of NH3 are needed to produce 1.90x10^5 of (NH4)2SO4? Answer in scientific notation
leva [86]
Molar mass :

NH₃ = 17.0 g/mol

(NH₄)₂SO₄ = 132 g/mol

2 NH₃ + H₂SO₄ = (NH₄)₂SO₄

2 x 17 g NH₃ ------------ 132 g <span> (NH</span>₄)₂SO<span>₄
</span>( mass NH₃) ------------ 1.90 x 10⁵ <span> (NH</span>₄)₂SO<span>₄

( mass NH</span>₃) = (1.90 x 10⁵) x 2 x 17 / 132
<span>
( mass NH</span>₃) = 6460000 / 132
<span>
( mass NH</span>₃) = 48939.39 g
<span>
in kg :

48939.39 / 1000 = 48.93 kg = 4.893 x 10</span>¹ kg
<span>
hope this helps!
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</span>
6 0
3 years ago
Question 3 of 10
Nookie1986 [14]

Answer:

A change in a substance where one or more new substances form

Explanation:

7 0
3 years ago
What volume of 1.5M NaOH is needed to provide 0.75 mol of NaOH?
lutik1710 [3]
1.5M NaOH so we've 1.5 moles of NaOH in 1L of solution

1L = 1000 ml

1.5 moles of NaOH ------------in------------- 1000 ml
0.75 moles of NaOH ----------in---------------x ml
x = 500 ml

<em><u>answer: C</u></em>
5 0
3 years ago
Atom , classify it<br><br><br><br><br>helppoppppoeowiie​
timama [110]

Answer:

A atom is a small unit to which matter can be divided without releasing electrically charged particles

Explanation:

5 0
3 years ago
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