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BlackZzzverrR [31]
3 years ago
15

What is the standard notation for 7.934 x 10-4 ?

Chemistry
1 answer:
maks197457 [2]3 years ago
4 0

Answer:

It is

Explanation:

75.34 Im hopeing this correct.Very sorry if wrong.

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Yes, 50 pennies plus 50 pennies equals 100 pennies minus 50pennies equals 50 pennies.
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3 years ago
And with solution...
Tems11 [23]

Answer:

The answer to your question is: V = 6.93 L

Explanation:

Data

N₂ = 5.6 g

Volume of NH₃ = ?

                              14 g of N   ----------------  1 mol

                              5.6 g -----------------------   x

                             x = (5.6 x 1) / 14 = 0.4 mol of N

Reaction

                                N₂    +     3H₂    ⇒    2NH₃

                                1 mol of N₂   ----------------  2 moles of NH₃

                                0.4 mol of N₂ --------------   x

                               x = (0.4 x 2) / 1

                               x = 0.8 mol of NH₃

Formula

                 PV = nRT

P = 5200 torr = 6.84 atm

V = ?

n = 0.8

R = 0.082 atm L/ mol °K

T = 450°C = 723°K

Substitution

                     V = (0.8)(0.082)(723) / 6.84

                     V = 6.93 L

7 0
3 years ago
What are three of Leonardo divinci's contributions to science?
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<span> hydraulic pumps, flying machines, and war machines.</span>
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In this experiment, you were asked to calculate your percent yield of alum assuming that you started with pure aluminum. Actuall
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Answer:

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Explanation:

Find attached calculations for detailed explanation.

3 0
3 years ago
The density of aluminium is 2.7 g/cm3. Find the mass in grams of a bar of aluminum measuring 2.7 cm by 1.2 cm by 14.3 cm.
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Answer:125.0964g

Explanation:

Density = mass/volume

Density = 2.7 gcm-3

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Mass=?

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= 2.7× 46.332=125.0964g

4 0
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