All categories

2 years ago

Convert 26.02 x 1023 molecules of C2H8 to grams. Round your answer to the hundredths place.

Chemistry

1 answer:

Akimi4 [234]2 years ago

6 0

No of molecules=26.02×10²³molecules

No of moles

26.02×10²³/6.023×10²³
4.3mol

Molar mass

C2H8
2(12)+8(1)
24+8
32g/mol

Mass

Moles×Molar mass
32(4.3)
137.6g

You might be interested in

PLEASE HELPP<br> Tell me everything you know about "balancing the equation" for science

Free_Kalibri [48]

Watch melissa maribel explains it amazingly on her yt channel

3 0

3 years ago

Round off the measurement to three significant figures 12.17º C

prohojiy [21]

12.2 C
It has 3 significant figures now.

6 0

3 years ago

For the reaction of hydrogen with iodine

fenix001 [56]

Answer:

$r_{H_2} = \frac{-1}{2} r_{HI}$

Explanation:

Hello!

In this case, considering the given chemical reaction:

$H_2(g) + I_2(g) \rightarrow 2HI(g)$

Thus, by applying the law of rate proportions, we can write:

$\frac{1}{-1} r_{H_2} = \frac{1}{-1}r_{i_2} = \frac{1}{2} r_{HI}$

Whereas the stoichiometric coefficients of reactants are negative due their disappearance and that of the product is positive due to its appearance. In such a way, when we relate the rate of disappearance of hydrogen gas to the rate of formation of hydrogen iodide, we obtain:

$r_{H_2} = \frac{-1}{2} r_{HI}$

Best regards!

8 0

2 years ago

Which of the following is the best explanation for the fact that crushing increases the rate at which a solid dissolves in a liq

Oksana_A [137]

It’s D cause i know I know I know I know

7 0

3 years ago

suppose you are testing the buoyancy of different objects . study the table and choose object with the greatest buoyant force

Alika [10]

The formula to calculate buoyant force (FB) states that the upward force exerted on an immersed object is equal to the density (ρ ) of the fluid multiplied by both the fluid’s displaced volume (V) and the gravitational acceleration (g), or
FB = ρ x V x g.<span>
I hope that helped with what you're doing.
You can also try water displacement in a graduated cylinder.</span>

7 0

3 years ago