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Korolek [52]
3 years ago
12

In a chemical reaction, the mass of the products is equal to __. 11

Chemistry
1 answer:
Deffense [45]3 years ago
7 0
The answer for that is 16, math right?
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The positive sign of the energy difference in a chemical reaction would indicate that ..........
trasher [3.6K]

Answer:

B) the chemicals are gaining energy from the surroundings.

Explanation:

The positive sign of the energy difference in a chemical reaction would indicate that the chemicals are gaining energy from the surroundings. This is what happens in an endothermic reaction.

In an endothermic reaction, heat is absorbed from the surroundings hence the surrounding becomes colder at the end of the changes.

  • Here the energy change is assigned a positive value.
  • This is because the heat energy level of the final state is higher than that of the initial state.
  • So, the difference gives a positive value.
3 0
2 years ago
Myra wants to measure the pH of a sample of drinking water as accurately as possible. What method should she use?
zhenek [66]
Use a strip of paper covered in PH indicating dye.
7 0
2 years ago
When using a dichotomous key to identify organisms what do we look at
Inga [223]

Answer:

a. physical features

Explanation:

google

{and my biology teacher is <u><em>awesome</em></u> ❌}  

3 0
3 years ago
Match these items
masha68 [24]
The correct matches are as follows:

<span>1.instantaneous combustion 
</span>G.burning<span>

2.mass of substances before and after a reaction is the same
</span>C.Law of Conservation of Matter<span>

3.substances that combine
</span>A.reactants
<span>
4. Yields or makes
</span>B.arrow symbol 
<span>
5.rapid oxidation
</span>F.explosion<span>

6.new substance
</span>D.product
<span>
7.slow oxidation
</span>E.rust
<span>
Hope this answers the question. Have a nice day.

</span>
4 0
3 years ago
Read 2 more answers
a sample of ideal gas at room temperature occupies a volume of 12.0 L at a pressure of 392 torr. if the pressure changes to 1960
Setler79 [48]
852 x 40.0= 4260 x v2 
<span>v2= 8 L </span>

<span>b) 852 x 40 = p2 x 69.0 </span>
<span>p2= 494 torr</span>
3 0
2 years ago
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