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Leviafan [203]
3 years ago
10

Explain why hydrogen gas is given off when a reactive metal undergoes a single-displacement reaction with water.

Chemistry
1 answer:
Kay [80]3 years ago
3 0
Hydrogen gas is given off when a reactive metal undergoes a single-displacement reaction with water is because the <span>very active metals react with water. For example, calcium reacts with water to form calcium hydroxide and hydrogen gas etc. </span>
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The physical process of evaporation involves -
Fynjy0 [20]

<span>Evaporation is the process of atoms or molecules in a liquid, or solid state (depending on the state of the substance sublimes) gains enough energy to become gaseous. </span>

7 0
3 years ago
What type of heat transfer will occur between the heated water in a heated pool and yourself?
coldgirl [10]
Correct answer is conduction, A
5 0
4 years ago
Which reaction occurs when equivalent quantities of H" (or H30) and OH" are mixed?
Lynna [10]

Answer: A reaction which occurs when equivalent quantities of H" (or H_{3}O^{+}) and OH" are mixed is a neutralization reaction.

Explanation:

When acid and base chemically combine together to form sat and water then it is know as neutralization reaction.

An acidic substance gives hydrogen ions (H^{+}) on dissociation and a basic substance gives hydroxide ions (OH^{-}) on dissociation.

For example, H^{+} + OH^{-} \rightarrow H_{2}O is a neutralization reaction where an acid and base are mixed together to form water.

No salt is formed as because here the reactants are not present as compounds.

In a hydrolysis reaction, water molecule(s) is added to the reactant molecules.

For example, CH_{3}COOCH_{3} + H_2O \rightarrow CH_{3}COOH + CH_{3}OH

Oxidation is the process of addition of oxygen to a molecule and removal of hydrogen.

Reduction is the process of addition of hydrogen in a compound and the removal of oxygen atom.

Therefore, we can conclude that reaction which occurs when equivalent quantities of H" (or H_{3}O^{+}) and OH" are mixed is a neutralization reaction.

4 0
3 years ago
A 11.79 g sample of Mo2O3(s) is converted completely to another molybdenum oxide by adding oxygen. The new oxide has a mass of 1
Elis [28]

Answer:

MoO₃

Explanation:

To solve this question we must find the moles of molybdenum in Mo2O3. The moles of Mo remain constant in the new oxide. With the differences in masses we can find the mass of oxygen and its moles obtaining the empirical formula as follows:

<em>Moles Mo2O3 -Molar mass: 239,878g/mol-</em>

11.79g * (1mol / 239.878g) = 0.04915 moles Mo2O3 * (2mol Mo / 1mol Mo2O3) = 0.09830 moles Mo

<em>Mass Mo in the oxides:</em>

0.09830 moles Mo * (95.95g/mol) = 9.432g Mo

<em>Mass oxygen in the new oxide:</em>

14.151g - 9.432g = 4.719g oxygen

<em>Moles Oxygen:</em>

4.719g oxygen * (1mol/16g) = 0.2949 moles O

The ratio of moles of O/Mo:

0.2949molO / 0.09830mol Mo = 3

That means there are 3 moles of oxygen per mole of Molybdenum and the empirical formula is:

<h3>MoO₃</h3>
3 0
3 years ago
Where does water vapor in the air come from?
arsen [322]

Answer:

Heat from the Sun causes water to evaporate from the surface of lakes and oceans. This turns the liquid water into water vapor in the atmosphere. Plants, too, help water get into the atmosphere through a process called transpiration!

3 0
3 years ago
Read 2 more answers
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