All categories

3 years ago

How many grams are in 0.0150 moles of caffeine c8h10n4o2?

1 answer:

7 0

The grams are in 0.0150 moles of caffeine C8H10N4O2

mass = moles of C8H10N4O2 x molar mass of C8H10N4O2

= 194g/mol x 0.0150mol = 2.91 grams

there is 2.94 grams in 0.01150 of caffeine

You might be interested in

What is abbreviated structural formula of the 2-metil-5-isopropiloctan?

Alja [10]

Answer:

CH3

CH3- C H -CH2-CH2- CH - CH2-CH2-CH3

/ \

CH3 CH3

Explanation:

Octan

C-C-C-C-C-C-C-C

Metyl

CH3 -

Isopropyl

CH3

- CH

CH3

2-metil-5-isopropiloctan

CH3

CH3- C H -CH2-CH2- CH - CH2-CH2-CH3

/ \

CH3 CH3

8 0

3 years ago

An archaeologist graduate student found a leg bone of a large animal during the building of a new science building. The bone had

Vlad [161]

Answer : The time passed in years is $2.74\times 10^2\text{ years}$

Explanation :

Half-life of carbon-14 = 5730 years

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{t_{1/2}}$

$k=\frac{0.693}{5730\text{ years}}$

$k=1.21\times 10^{-4}\text{ years}^{-1}$

Now we have to calculate the time passed.

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $1.21\times 10^{-4}\text{ years}^{-1}$

t = time passed by the sample = ?

a = initial amount of the reactant disintegrate = 15.3

a - x = amount left after decay process = 14.8

Now put all the given values in above equation, we get

$t=\frac{2.303}{1.21\times 10^{-4}}\log\frac{15.3}{14.8}$

$t=274.64\text{ years}=2.74\times 10^2\text{ years}$

Therefore, the time passed in years is $2.74\times 10^2\text{ years}$

4 0

3 years ago

Find the density of a material given that a 5.03g sample occupies 3.24ml

Verizon [17]

Formula for density:

D = Mass / Volume

Mass = 5.03g

Volume = 3.24ml

Formula in our case:

D = 5.03 / 3.24

$D = 0.31~g/m^{3}$

Hope it helped,

BioTeacher101

3 0

3 years ago

Sulfur has 16 electrons. When it combines with magnesium. It acquires A -2 charge. How many electrons does it have now?

Rainbow [258]

18 electrons. With a -2 charge, that means it gains two electrons.

8 0

2 years ago

Which food is mainly made up of carbohydrates?

Alenkasestr [34]

Bread is the answer you are looking for please mark as brainliest! :)

6 0

3 years ago