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3 years ago

What might your life be like if Mr. Fleming didn't notice that the mold killed the bacteria?

Chemistry

2 answers:

Ad libitum [116K]3 years ago

8 0

Answer:

probably kinda weird

Explanation:

Phantasy [73]3 years ago

4 0

Answer:

Horriable

Explanation:

Bad because we all would've lived with some viruses

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CH, (g) + 20 (g) → CO(g) + 2H 0(g)

galben [10]

<h3>Answer:</h3>

126.14 g

<h3>Explanation:</h3>

Complete combustion of hydrocarbons yields water and carbon dioxide.
Methane is a hydrocarbon in the homologous series known as alkanes.
Methane undergoes combustion in air to produce water and carbon dioxide according to the equation below.

CH₄ (g) + 2O₂ (g) → CO₂(g) + 2H₂O(g)

We are given;

3.5 moles of Methane

We are required to determine the mass of H₂O produced

<h3>Step 1: Moles of H₂O produced</h3>

From the equation 1 mole of methane undergoes combustion to produce 2 mole of H₂O.

Therefore, Moles of methane = Moles of H₂O × 2

Hence, Moles of H₂O = 7.0 moles

<h3>Step 2: Mass of H₂O produced </h3>

We know that; mass = Moles × Molar mass

Molar mass of water = 18.02 g/mol

Therefore;

Mass of water = 7.0 moles × 18.02 g/mol

= 126.14 g

Thus, the mass of water produced is 126.14 g

6 0

3 years ago

What happens to the particles as you increase the oven’s temperature

vekshin1

The particles move faster because heat causes the atoms to speed up and move farther from each other.

3 0

3 years ago

The solid form of a substance is usually more dense than its liquid and gaseous forms. Similarly the liquid form is usually more

bonufazy [111]

A is the answer.

Ice is solid, however, water is liquid. Yet ice still floats which is less dense than water.

Hope this helps!

4 0

3 years ago

Explain examples of a physical and chemical change of matter

monitta

HEY DEAR..

PHYSICAL CHANGE

Those Changes in which no new substances are formed are called physical changes. it is a temporary changes which can be reversed easily to form the original substance.

Example:- Melting of ice , Making a solution, Glowing of an electric bulb , freezing of water etc.

CHEMICAL CHANGE

Those changes in which new substances are formed are called chemical changes. it means it is permanent changes which are usually irreversible.

Example:- Burning of charcoal, fuels and cutting of trees, even digestion of food is in chemical change.

HOPE ITS HELPFULLL

BE BRAINLY.

6 0

4 years ago

Calculate the entropy change in the surroundings associated with this reaction occurring at 25∘C. Express the entropy change to

zhuklara [117]

Answer:

That means that if you are calculating entropy change, you must multiply the enthalpy change value by 1000. So if, say, you have an enthalpy change of -92.2 kJ mol-1, the value you must put into the equation is -92200 J mol-1

8 0

3 years ago