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astraxan [27]
3 years ago
15

I WILL GIVE U BRAINLIEST IF UR CORRECT

Chemistry
2 answers:
KiRa [710]3 years ago
7 0

Answer:

D: a new substance

Explanation:

Chemical reaction

A change in matter that produces on or more new substances

baherus [9]3 years ago
3 0

Answer:

<u>D. A new substance</u> is always a result of a chemical reaction.

Explanation:

In a chemical reaction, one or more reactants reacts/decomposes to form one or more products.

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Examples of light effecting chemical change​
Annette [7]

Answer:

burning of wood ,cooking an egg,baking a cake,rusting of iron,digestion of food .

8 0
3 years ago
Hydrogen gas (H2) reacts with oxygen gas (O2) and produces water. If one mol of hydrogen reacts with one mole of oxygen, what is
Amiraneli [1.4K]
HI 

So, the formula for water is H2O

When you have the same amount of the reactants , hydrogen will be the limiting reactant. 
Limiting reactant is the thing that runs out first.
3 0
3 years ago
As a bond is broken in a compound the potential energy of the atoms generally does what
hichkok12 [17]
When a bond is broken that should be a type of reaction. When bonds are broken sometimes heat is released.
6 0
3 years ago
If 3.0 liters of oxygen gas react with excess carbon monoxide at STP, how many liters of carbon dioxide can be produced under th
mr_godi [17]

Answer:

The volume of CO2 produced is 6.0 L (option D)

Explanation:

Step 1: Data given

Volume of oxygen = 3.0 L

Carbon monoxide = CO = in excess

Step 2: The balanced equation

2 CO (g) + O2 (g) → 2 CO2 (g)

Step 3: Calculate moles of O2

1 mol of gas at STP = 22.4 L

3.0 L = 0.134 moles

Step 3: Calculate moles of CO2

For 2 moles CO we need 1 mol of O2 to produce 2 moles of CO2

For 0.134 moles O2 we'll have 2*0.134 = 0.268 moles CO2

Step 4: Calculate volume of CO2

1 mol = 22.4 L

0.268 mol = 22.4 * 0.268 = 6.0 L

The volume of CO2 produced is 6.0 L

8 0
3 years ago
Hen solid kbr is dissoved in water, the solution gets colder. this is an example of a(n) ________ reaction.
Sonja [21]
Endothermic reactions. These are reactionsthat take in energy from the surroundings. The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to get colder
7 0
3 years ago
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