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3 years ago

How many moles are in 25 grams of Li? How do you know?

Chemistry

1 answer:

Ipatiy [6.2K]3 years ago

8 0

Answer:

3.6mol Li

Explanation:

To get the amount of moles from the mass we divide the mass by the molar mass.

25g ÷ 6.941g/mol = 3.6mol Li

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How many atoms of Fr are there?

kramer

The answer is: 87
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3 years ago

Read 2 more answers

How many moles are in 272 grams of hydrogen peroxide (H2O2) ?

Strike441 [17]

Answer:

8 moles

Explanation:

When we are asked to convert from grams of a substance into moles, we have to use the substance's molar mass.

Meaning that for this problem, we'll use the molar mass of hydrogen peroxide (H₂O₂), as follows:

272 g ÷ 34 g/mol = 8 mol

There are 8 moles in 272 grams of hydrogen peroxide.

7 0

3 years ago

PLEASE ANSWER ASAP AND SHOW WORK: A camping stove uses a 5.0 L propane tank that holds 68.0 moles of liquid C3H8. How large a co

seropon [69]

Answer: The volume of the container needed is 554.6 L

Explanation:

To calculate the volume of the gas, we use the equation given by ideal gas which follows:

$PV=nRT$

where,

P = pressure of the gas = 3.0 atm

V = Volume of the gas = ? L

T = Temperature of the gas = $25^oC=[25+273]K=298K$

R = Gas constant = $0.0821\text{ L.atm }mol^{-1}K^{-1}$

n = number of moles of propane gas = 68.0 moles

Putting values in above equation, we get:

$3.0atm\times ?L=68mol\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 298K\\\\V=\frac{68\times 0.0821\times 298}{3.0}=554.6L$

Hence, the volume of the container needed is 554.6 L

6 0

3 years ago

The Lineweaver–Burk plot, which illustrates the reciprocal of the reaction rate ( 1 / v ) versus the reciprocal of the substrate

lesya [120]

Answer:

x-intercept = $\frac{-1}{Km}$
y-intercept = $\frac{1}{Vmax}$
Slope = $\frac{Km}{Vm}$

Explanation:

Please check the graph attached.

7 0

3 years ago

Which is not the same as 5.63 grams

Anarel [89]

We must first convert the weight in grams to milligrams and hectograms to find the right answer. 5.63 grams 0.0563 hectograms
5.63 grams=5,630 milligrams
So it's 5,630

3 0

4 years ago