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4 years ago

6

How many liters are in one kiloliter?

1 answer:

erastovalidia [21]4 years ago

7 0

There are 1000 L in 1 kilo litre.

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What is the weight of a 90kg man standing on Earth, where gᵉᵃʳᵗʰ = 9.82 m/s^2?

Ray Of Light [21]

Answer:

$88.38 Kgm/s^2$

Explanation:

Mass and weight are quite different terms .

Weight is defined as the amount of force exerted on the earth due to our mass and gravity of acceleration.

$W=m*g$

Given that the mass is 90 kg and gravity of acceleration of earth is 9.82 m/s^2.

So weight will be

$W=90*9.82\\\\ W=88.38 Kgm/s^2$

So this is the weight of the 90kg man standing on earth.

7 0

3 years ago

The elements in Period 5 on the Periodic Table are arranged from left to right in order of(1) decreasing atomic mass(2) decreasi

RUDIKE [14]

Going from left to right, they are ordered by increase in atomic number

6 0

3 years ago

Read 2 more answers

Calculate either [H3O+] or [OH−] for each of the solutions at 25 °C. Solution A: [OH−]=1.55×10−7 M Solution A: [H3O+]= M Solutio

Ahat [919]

Answer: A. $[H_3O^+]=0.64\times 10^{-7}M$

B. $[OH^-]=0.11\times 10^{-5}M$

C. $[OH^-]=\frac{10^{-14}}{0.000775}=1.3\times 10^{-11}M$

Thus solution B is basic in nature.

Explanation:

pH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

pH for acidic solutions is less than 7, for basic solutions it is more than 7 and for neutral solutions it is equal to 7.

$pH=-\log [H^+]$

$pOH=-log[OH^-]$

$pH+pOH=14$

or $[H^+][OH^-]=10^{-14}$

A. $[OH^-]=1.55\times 10^{-7}M$

$[H_3O^+]=\frac{10^{-14}}{1.55\times 10^{-7}}=0.64\times 10^{-7}M$

$pH=-log[H_3O^+]=-log[0.64\times 10^{-7}]=7$

B. $[H_3O^+]=9.43\times 10^{-9}M$

$[OH^-]=\frac{10^{-14}}{9.43\times 10^{-9}}=0.11\times 10^{-5}M$

$pH=-log[H_3O^+]=-log[9.43\times 10^{-9}]=8$

C. $[H_3O^+]=0.000775M$

$[OH^-]=\frac{10^{-14}}{0.000775}=1.3\times 10^{-11}M$

$pH=-log[H_3O^+]=-log[0.000775]=3$

Thus solution B is basic.

4 0

3 years ago

Calculate the answer. Express it in scientific notation and make sure it has the correct number of significant figures. (2.45 x

Lerok [7]

The answer is 10,046,528.8 !

3 0

3 years ago

Read 2 more answers

What is the reducing agent in the following reaction

nika2105 [10]

Answer: $Fe^{2+}$ is the reducing agent

Explanation:

Oxidation reaction : When there is an increase in oxidation state number.

Reduction reaction : when there is a decrease in oxidation state number.

$5Fe^{2+}(aq)+MnO_4^-(aq)+8H^+(aq)\rightarrow 5Fe^{3+}(aq)+Mn^{2+}(aq)
+4H_2O(l)$

Fe has undergone oxidation, as its oxidation state is changing from+2 to +3.

Mn has undergone reduction, as its oxidation state is changing from +7 to +2.

The chemical agent which itself get oxidized and reduce others is called reducing agent. $Fe^{2+}$ is a reducing agent.

The chemical agent which itself get reduced and oxidize others is called oxidizing agent. $MnO_4^-$ is an oxidizing agent.

.

6 0

3 years ago