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nekit [7.7K]
3 years ago
7

The substance that burns in a combustion reaction is called the

Chemistry
1 answer:
amm18123 years ago
7 0

CO2 GAS AND WATER VAPOURS

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Which substance cannot be separated physically or chemically? a solution an element a compound a mixture
Katena32 [7]

Answer:

An element

Explanation:

Elements are not able to be separated, but everything else can, whether that be physically or chemically.

8 0
3 years ago
Read 2 more answers
-3 × 4=? ....................​
blagie [28]

Answer:

-12

Explanation:

a negative times a positive is negative

8 0
3 years ago
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A helium-filled balloon has a volume of 2.48 L and a pressure of 150 kPa. The volume of the balloon increases to 2.98 L after yo
Tema [17]

Answer:

THE NEW PRESSURE OF THE HELIUM GAS AT 2.98 L VOLUME IS 124.8 kPa.

AT AN INCREASE ALTITUDE, THERE IS A LOWER PRESSURE ENVIRONMENT AND THE HELIUM GAS PRESSURE DECREASES AND HENCE AN INCREASE IN VOLUME.

Explanation:

The question above follows Boyle's law of the gas law as the temperature is kept constant.

Boyle's law states that the pressure of a fixed mass of gas is inversely proportional to the volume, provided the temperature remains constant.

Mathematically, P1 V1 = P2 V2

P1 = 150 kPa = 150 *10^3 Pa

V1 = 2.48 L

V2 = 2.98 L

P2 = ?

Rearranging the equation, we obtain;

P2 = P1 V1 / V2

P2 = 150 kPa * 2.48 / 2.98

P2 = 372 *10 ^3 / 2.98

P2 = 124.8 kPa.

The new pressure of the gas when at a height which increases the volume of the helium gas to 2.98 L is 124.8 kPa.

6 0
3 years ago
Which amino acid is least likely to produce a hydrogen bond with water or polar molecules?
KonstantinChe [14]
9 amino acids (alanine, cysteine, glycine, isoleucine, leucine, methionine, phenylalanine, proline, valine) have no hydrogen donor or acceptor atoms in their side chains.
3 0
3 years ago
Which is a thermosetting plastic?<br><br>Polythene<br>PVC<br>Melamine<br>Nylon​
serg [7]
Melamine should be the right answer, i hope this helps.
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3 years ago
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