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andriy [413]
4 years ago
6

Find the mass in 6.2 moles of lithium bromide

Chemistry
1 answer:
Art [367]4 years ago
7 0

1
mol of lithium bromide has a mass of
86.85

g
⋅
m
o
l
−
1
. You have
2.6
moles of the stuff.
Explanation:
So mass
=

86.85

g
⋅
m
o
l
−
1
×

2.6

m
o
l

=

?
?

g
.
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Lonization Energy decreases as you go down a family (group or column). Explain why this pattern
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Answer:

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3 years ago
How many liters of a 3 M NaOH stock solution would you need to make 552 mL of a 105 mM NaOH dilution
Ganezh [65]

Answer:

0.01932 L

Explanation:

First we <u>convert 105 mM to M</u>:

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Next we <u>convert 552 mL to L</u>:

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Then we use the following equation:

  • C₁V₁=C₂V₂

Where:

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3 years ago
Ecology is defunded as the environment study of
stiks02 [169]

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Explanation:

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3 years ago
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Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. (6.0 x 1
Greeley [361]
I believe the correct answer from the choices listed above is the second option. The expression (6.0 x 104) (3.1 x 10-1) is equal to 1.9 x 10^4. We only have two significant figures from the starting expression that is why we rounded of the product from 1.86 to 1.9.
3 0
3 years ago
the chemical compound C2F4 is used to make PTEE (Teflon). How manyC2F4 molecules are in 485 kilograms of this material?
monitta

Answer:

molecules=2.92x10^{27}moleculesC_2F_4

Explanation:

Hello,

In this case, we use the Avogadro's number to compute the molecules of C2F4 whose molar mass is 100 g/mol contained in a 485-kg sample as shown below:

molecules=485kgC_2F_4*\frac{1000gC_2F_4}{1kgC_2F_4} *\frac{1molC_2F_4}{100gC_2F_4}*\frac{6.022x10^{23}molecules C_2F_4}{1molC_2F_4}  \\\\molecules=2.92x10^{27}moleculesC_2F_4

Best regards,

5 0
3 years ago
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