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ozzi
3 years ago
10

I need help ASAP answer must be correct really important test!!!! Will give brainlest☺️☺️☺️

Chemistry
2 answers:
vitfil [10]3 years ago
4 0

its the top answer

answer


Softa [21]3 years ago
4 0
A) They both experience contact forces

Hope this helps =)
Please tell me if I'm wrong
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A gram of gasoline produces 45.0kj of energy when burned. gasoline has a density of 0.77/gml . how would you calculate the amoun
babymother [125]
Given that there is 48 liters of gasoline to be burned and that 45 kJ of energy is released per gram of gasoline burned, the amount of energy that the gasoline fuel produces can then be calculated, First, we convert 48 liters of gasoline to units of mass (grams) in order to use the given conversion of 45 kJ per gram of gasoline. To do this, we use the density of gasoline which is 0.77 g/mL. The following expression is then used:

48 L gasoline x 1000 mL/L x 0.77 g/mL x 45 kJ/g gasoline = 1663200 kJ

<span>The amount of energy produced by burning 48 L of gasoline was then determined to be 1663200 kJ. </span>    
5 0
3 years ago
While under constant pressure, the temperature of 892 mL of a gas is changed from 193 °C to 144 °C. What is the new gas volume?
galina1969 [7]

Answer:

please mark my answer brainliest

Explanation:

nice question...

ok solution goes right the way through...

in temp 193°C the volume of gas was 892ml

so for...144°C the volume of gas will be 892/193x144=665.533 or 665.534...(rounded off)...or 665°...(approx)....so got ur answer...

I hope it helps....

please comment if you have any further questions...i will be solving it for u...

please mark my answer brainliest

7 0
4 years ago
An example of a chemical change is burning a wood log to give a pile of ashes.<br> O True O False
serious [3.7K]

Answer:

True

Explanation:

<em>An example of a chemical change is burning a wood log to give a pile of ashes.</em> TRUE. In a chemical change there is a change in the identity of the substances, that is, some substances react (reactants) in order to form other substances (products).

A wood log is made of cellulose and organic compound that react with oxygen to produce carbon dioxide and water mainly.

5 0
3 years ago
Read 2 more answers
When does the composition of a substance does not change?
blagie [28]
I think when it does not react with anything I think
4 0
3 years ago
You have two samples of the same gas in the same size container, with the same pressure. The gas in the first container has a Ke
vodomira [7]
<span>PV=nRT Since P, V and R are constant, when T goes up, n must go down by the same factor      </span>1:4
3 0
4 years ago
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