All categories

3 years ago

In the reaction 2K + 2H2O→2KOH + H2 , which compound has an element ratio of 2:1 ?

Chemistry

2 answers:

Katyanochek1 [597]3 years ago

5 0

Answer:

Option O = H₂O

Explanation:

Chemical reaction:

2K + 2H₂O → 2KOH + H₂

In this balanced chemical equation we can see that water is the only compound that consist of two hydrogen atom and one oxygen atom. H : O

2 : 1 .

In case of KOH two hydroxyl and two potassium atom are present and ration is K:OH 1:1.

stich3 [128]3 years ago

3 0

Answer: Option (c) is the correct answer.

Explanation:

A compound is defined as the substance in which different elements are chemically combine together in a fixed ratio by mass.

For example, $H_{2}O$ and KOH are both compounds in the given reaction equation.

Here, in $H_{2}O$ the atoms are present in 2:1 ratio and in KOH compound the atoms are present in 1:1 ratio.

A compound can be divided into its constituent or simpler substances.

Thus, we can conclude that in the given reaction only $H_{2}O$ is the compound which has an element ratio of 2:1.

You might be interested in

Can someone please help me understand this?

Nataliya [291]

Answer:

French physicist Jacques Charles (1746-1823) studied the effect of temperature on the volume of a gas at constant pressure. Charles's Law states that the volume of a given mass of gas varies directly with the absolute temperature of the gas when pressure is kept constant. The absolute temperature is temperature measured with the Kelvin scale. The Kelvin scale must be used because zero on the Kelvin scale corresponds to a complete stop of molecular motion.

alt

Figure 11.5.1: As a container of confined gas is heated, its molecules increase in kinetic energy and push the movable piston outward, resulting in an increase in volume.

Mathematically, the direct relationship of Charles's Law can be represented by the following equation:

As with Boyle's Law, k is constant only for a given gas sample. The table below shows temperature and volume data for a set amount of gas at a constant pressure. The third column is the constant for this particular data set and is always equal to the volume divided by the Kelvin temperature.

Explanation:

PLEASS MARK ME AS BRAINLIEST ANSWER

4 0

3 years ago

Which best describes the tyndall effect? the scattering of light by solutes in a mixture the scattering of light by solvent in a

Oksanka [162]

the scattering of light by particles in a mixture

3 0

3 years ago

Read 2 more answers

HCL ejercicio de química

marin [14]

What I can’t understand I’m American

5 0

3 years ago

Read 2 more answers

A 1.00 liter solution contains 0.43 M hydrofluoric acid and 0.56 M potassium fluoride. If 0.280 moles of potassium hydroxide are

kolbaska11 [484]

Answer:

Answers are in the explanation

Explanation:

Equlibrium of HF in H₂O is:

HF + H₂O ⇄ F⁻ + H₃O⁺

Now, the KOH reacts with HF, thus:

KOH + HF → F⁻ + H₂O

That means after reaction, concentration of HF decrease increasing F⁻ concentration.

Now, seeing the equilibrium, as moles of HF decrease and F⁻ moles increase, the equilibrium will shift to the left decreasing H₃O⁺ concentration.

For the statements:

A. The number of moles of HF will increase. FALSE. HF react with KOH, thus, moles of HF decrease

B. The number of moles of F- will decrease. FALSE. The reaction produce F⁻ increasing its moles.

C. The equilibrium concentration of H₃O⁺ will increase. FALSE. The equilibrium shift to the left decreasing concentration of H₃O⁺

D. The pH will decrease. FALSE. As the H₃O⁺ concentration decrease, pH will increase

E. The ratio of [HF] / [F-] will remain the same. FALSE. Because moles of HF are decreasing whereas F- moles are increasing changing, thus, ratio.

6 0

3 years ago

Hot, molten rock deep below Earth’s surface is called lava mantle rock parent rock magma

Rashid [163]

Answer:

I think it is Magma

6 0

3 years ago