All categories

3 years ago

WILL GIVE BRAINLIEST!!

Chemistry

1 answer:

sesenic [268]3 years ago

3 0

Answer:

4725.6 g of (NH4)2SO4

Explanation:

Molar mass of a substance is the number of mass of the substance contained in one mole of the substance. It is also called the formula weight of the compound. The formula mass of (NH4)2SO4 is 132 g/mol Hence;

Now we know that;

1 mole of (NH4)2SO4 contains 132 g of (NH4)2SO4

35.8 moles of (NH4)2SO4 contains 35.8 * 132/1

= 4725.6 g of (NH4)2SO4

You might be interested in

Is 2Zn + 2HCI = ZnCL2 + H2 balanced or unbalanced

riadik2000 [5.3K]

Unbalanced it should be 2Zn+2Hcl=2ZnCl2+H2

7 0

3 years ago

How many half-lives are required for the concentration of reactant to decrease to 1.56% of its original value?4247.56.56

neonofarm [45]

Answer:

6 half-lives are required for the concentration of reactant to decrease to 1.56% of its original value.

Explanation:

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t

$[A_0]$ is the initial concentration

Given:

Concentration is decreased to 1.56 % which means that 0.0156 of $[A_0]$ is decomposed. So,

$\frac {[A_t]}{[A_0]}$ = 0.0156

Thus,

$\frac {[A_t]}{[A_0]}=e^{-k\times t}$

$0.0156=e^{-k\times t}$

kt = 4.1604

The expression for the half life is:-

Half life = 15.0 hours

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

Where, k is rate constant

So,

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

$\frac{4.1604}{t}=\frac {ln\ 2}{t_{1/2}}$

$t = 6\times t_{1/2}$

<u>6 half-lives are required for the concentration of reactant to decrease to 1.56% of its original value.</u>

6 0

3 years ago

As carbon dioxide enters systemic blood, it causes more oxygen to dissociate from hemoglobin, which in turn allows more CO2 to c

vagabundo [1.1K]

Answer:

The correct answer is "False".

Explanation:

It is false that as carbon dioxide enters systemic blood, it causes more oxygen to dissociate from hemoglobin. Once an atom of oxygen binds to hemoglobin, hemoglobin change its shape and makes easier than a second and a third atom of oxygen binds towards it. This change in conformation makes no possible that carbon dioxide can cause that oxygen dissociates from hemoglobin.

5 0

3 years ago

I am a little confused

Sonbull [250]

The answer is D. I did that and i got it right.

7 0

3 years ago

Read 2 more answers

What is true of a compound? . a. It does not retain the properties of the substances that make it up. b. It retains the properti

LekaFEV [45]

A. It does not retain the properties of the substances that make it up

8 0

4 years ago