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Vedmedyk [2.9K]

2 years ago

14

A change resulting in one or more new substances being formed is a?

1 answer:

dem82 [27]2 years ago

3 0

Answer:

C. Chemical change

Explanation:

A physical change is where something is changed but it doesnt affect the build up of the chemical. For example, if you broke sticks and threw them on the ground, that would be a physical change because the change is happening to the physical being of the object and not its chemical buildup. However, if you lit those sticks on fire, that would be considered a chemical change because you end up with two substances, ash and the remnants of the stick. A nuclear reaction would result in something blowing up so its not that. And a physical property is like what it looks like or how it smells. Hope I helped you!

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How many grams are present in a sample of aluminum?

MrMuchimi

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3 years ago

One of the products of photosynthesis is<br> carbon dioxide.<br> fire.<br> oxygen gas.<br> mass.

kondor19780726 [428]

One of the products of photosynthesis is carbon dioxide

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3 years ago

An aqueous solution of barium hydroxide is standardized by titration with a 0.102 M solution of perchloric acid. If 10.3 mL of b

Vesna [10]

<u>Answer:</u> The molarity of barium hydroxide solution is 0.118 M.

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $HClO_4$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is $Ba(OH)_2$

We are given:

$n_1=1\\M_1=0.102M\\V_1=24.0mL\\n_2=2\\M_2=?M\\V_2=10.3mL$

Putting values in above equation, we get:

$1\times 0.102\times 24.0=2\times M_2\times 10.3\\\\M_2=0.118M$

Hence, the molarity of $Ba(OH)_2$ solution will be 0.118 M.

6 0

2 years ago

Several science students were about to conduct an experiment on electricity. The teacher passed on the science activity which cl

olganol [36]

C. You should ALWAYS ask the teacher if you don't get something; your friends could be wrong, don't guess it, and NEVER cheat. Hope this helps!!

8 0

3 years ago

when 48 .0g of carbon reacts with oxygen gas to form carbon dioxide, no carbon or oxygen is left over. How much oxygen is reacte

Arte-miy333 [17]

Answer:

128g

Explanation:

Given parameters:

Mass of carbon = 48g

Mass of carbon dioxide = 176g

Unknown:

Mass of oxygen that reacted = ?

Solution:

Every chemical reaction must obey the law of conservation of mass. It states that "in a chemical reaction, matter is neither created nor destroyed" .

So;

Mass of carbon + Mass of oxygen = Mass of carbon dioxide

Mass of oxygen = Mass of carbon dioxide - Mass of carbon

Mass of oxygen = 176 - 48 = 128g

3 0

2 years ago