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julia-pushkina [17]
3 years ago
15

Evaluate ( a=2 b=3)...3a - 2b =​

Chemistry
2 answers:
Galina-37 [17]3 years ago
8 0

Answer:

0

Explanation:

If a equals 2 and b equals 3, plug in the 2 to the a and the 3 to the b.

3(2) - 2(3)

3 ⋅ 2 = 6

-2 ⋅ 3 = -6

6 - 6 = 0

I hope this helps!

skad [1K]3 years ago
4 0

Hey!

---------------------------------------------------

Steps To Solve:

~Substitute

3(2) - 2(3)

~Subtract

6 - 6

~Simplify

0

---------------------------------------------------

Answer:

\Large\boxed{\mathsf{0}}

---------------------------------------------------

Hope This Helped! Good Luck!

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Answer:

True

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Balance the equation for this reaction:<br> _ FeCl3 + KSCN --<br> --&gt; _ KCI + Fe(SCN)3
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3 0
3 years ago
How many moles of N2O5 are needed<br> to produce 7.90 g of NO2?
Roman55 [17]

Answer:

0.085 moles of  N₂O₅ are needed

Explanation:

Given data:

Mass of NO₂ produces = 7.90 g

Moles of N₂O₅ needed = ?

Solution:

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Number of moles of NO₂ produced :

Number of moles = mass/ molar mass

Number of moles = 7.90 g/ 46 g/mol

Number of moles = 0.17 mol

now we will compare the moles of NO₂   with N₂O₅.

                NO₂          :       N₂O₅

                  4            :          2

                0.17          :         2/4×0.17 = 0.085 mol

Thus, 0.085 moles of  N₂O₅ are needed.

4 0
3 years ago
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Answer:

Explanation:

Scientists know that there are 6x1023 molecules in a mole - so we have about 0.5x1023 molecules in our marble…and since every silicon dioxide molecule has one atom of silicon and two of oxygen, we have a grand total of 1.5x1023 atoms. That's 150,000,000,000,000,000,000,000 atoms

7 0
3 years ago
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