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3 years ago

PLS HELP ME PLSS GUYS PLS HELP ME IN 1

Chemistry

2 answers:

jek_recluse [69]3 years ago

4 0

The sun maybe because those are the autotrophs

asambeis [7]3 years ago

4 0

C because that’s where it gets it’s produces from

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A solution is prepared by dissolving 0.23 mol of hypochlorous acid and 0.27 mol of sodium hypochlorite in water sufficient to yi

finlep [7]

Answer:

hypochlorite ion

Explanation:

The hypochlorous acid, HClO, is a weak acid with Ka = 1.36x10⁻³, when this acid is in solution with its conjugate base, ClO⁻ (From sodium hypochlorite, NaClO) a buffer is produced. When a strong acid as HCl is added, the reaction that occurs is:

HCl + ClO⁻ → HClO + Cl⁻.

Where more hypochlorous acid is produced.

That means, the HCl reacts with the hypochlorite ion present in solution

3 0

3 years ago

If the freezing point of an aqueous 0.10 m glucose solution is −x°c, what is the approximate freezing point of a 0.10 m nacl sol

maks197457 [2]

Answer is: the approximate freezing point of a 0.10 m NaCl solution is -2x°C.
Van't Hoff factor (i) for NaCl solution is approximately 2.
Van't Hoff factor (i) for glucose solution is 1.
Change in freezing point from pure solvent to solution: ΔT = i · Kf · m.
Kf - molal freezing-point depression constant for water is 1,86°C/m.
m - molality, moles of solute per kilogram of solvent.
Kf and molality for this two solutions are the same, but Van't Hoff factor for sodium chloride is twice bigger, so freezing point is twice bigger.

8 0

3 years ago

What must two objects have in order for gravitational force to act on them speed gorse mass orbit

kiruha [24]

Answer:

it is mass

Explanation:

I took the test

8 0

3 years ago

Las capas del lecho marino del Mar Mediterráneo cuentan la historia de los cambios ambientales en el hoy desértico norte de Afri

slamgirl [31]

Answer:

160.000 años corresponde a 16.000 décadas.

Explanation:

Para resolver correctamente el ejercicio debemos plantear la regla de tres simple de la siguiente manera:

1 década equivale a 10 años; A cuantas decadas equivalen 160.000 años?

1 década→10 años

x ←160.000 años

Debemos multiplicar 160.000 por 1 y luego dividir entre 10 ;

x=( $\frac{160.000x1}{10}$ )=16.000 décadas; en notación científica sería 16x10^3.

Respuesta: 160.000 años corresponde a 16.000 décadas.

5 0

3 years ago

Do the following problem using significant figures. 4.5 cm x 2000.0 cm x 4 cm = I cm^3

Anon25 [30]

Given :

Measurements $4.5\ cm\times 2000.0\ cm\times 4\ cm$ .

To Find :

The multiplication using significant figures .

Solution :

We know , the least number of significant figures in any number of the problem determines the number of significant figures in the answer.

So , significant figure( S.F) in 4.5 cm is 2 .

S.F in 2000.0 cm is 5 .

S.F in 4 cm is 1 .

So , minimum S.F is 1 .

Therefore , S.F of their product is 1 .

Now , multiplying them we will get :

$M=4.5\times 2000.0\times 4 \ cm^3\\\\M=36000\ cm^3$

Now , converting 36000 in 1 significant digit .

First we will write it in exponential 2 S.F form.

$3.6\times 10^4 \ cm^3$

Now , to convert 3.6 into 1 S.F we should round off this .

So , round off 3.6 we will get 4 .

Therefore , The multiplication using significant figures is $4\times 10^4\ cm^3$ .

Hence , this is the required solution .

3 0

3 years ago