All categories

3 years ago

PLEASE HELP ILL MARK BRAINLIEST

Chemistry

1 answer:

maria [59]3 years ago

7 0

Answer:

1. true

2. existing matter

3. the materials simply turn into gases you cannot see

hope that helps! ☺

plz mark Brainliest!

You might be interested in

Kc for the reaction of hydrogen and iodine to produce hydrogen iodide.

tatiyna

Answer:

$[H_2]_{eq}=0.183M$

$[I_2]_{eq}=0.183M$

$[HI]_{eq}=0.025M$

Explanation:

Hello.

In this case, for this equilibrium problem, we first realize that at the beginning there is just HI, it means that the reaction should be rewritten as follows:

$2HI\rightleftharpoons H_2+I_2$

Whereas the law of mass action (equilibrium expression) is:

$Kc=\frac{[H_2][I_2]}{[HI]^2}$

That in terms of initial concentrations and reaction extent or change $x$ turns out:

$Kc=\frac{x*x}{([HI]_0-2x)^2}\\\\54.3=\frac{x^2}{(0.391M-2x)^2}$

And the solution via solver or quadratic equation is:

$x_1=0.183M\\\\x_2=0.210M$

Whereas the correct answer is 0.183 M since the other value yield a negative concentration of HI at equilibrium (0.391-2*0.210=-0.029M).This, the equilibrium concentrations are:

$[H_2]_{eq}=0.183M$

$[I_2]_{eq}=0.183M$

$[HI]_{eq}=0.391M-2*0.183M=0.025M$

Regards.

6 0

3 years ago

Which mixture of a would is soluble and insoluble in water?

Anuta_ua [19.1K]

SOLUBILITY is an ability of a substance to dissolve. In the process of dissolving, the substance which is being dissolved is called a solute and the substance in which the solute is dissolved is called a solvent. A mixture of solute and solvent is called a solution.

3 0

3 years ago

Which statement correctly describes a product of a reaction within

Neporo4naja [7]

Answer:

pls correct me if im wrong

3 0

3 years ago

To make a sarurated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 k . Find its concentration at this t

nexus9112 [7]

Answer:

The answer is " $26.47\%$ "

Explanation:

Sodium chloride solute mass $=36 \ g$

Solvent water mass $=100\ g$

Calculating the solution mass = Solute mass + solvent mass

$= 36\ g +100\ g\\\\ = 136\ g\\\\$

Calculating the percentage of concentration:

$= \frac{solute\ mass}{solvent\ mass} \times 100\\\\=\frac{36\ grm}{136\ grm} \times 100\\\\=0.2647 \times 100\\\\=26.47 \%$

3 0

3 years ago

If atoms are so tiny how do we know they exist

Aleksandr [31]

There are three ways that scientists have proved that these sub-atomic particles exist. They are direct observation, indirect observation or inferred presence and predictions from theory or conjecture. Scientists in the 1800's were able to infer a lot about the sub-atomic world from chemistry.

5 0

3 years ago