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Sauron [17]
4 years ago
7

Steel is an example of a pure substance because it is made up of two different metals melted together. (4 points) True False

Chemistry
1 answer:
Lunna [17]4 years ago
3 0

Answer:

false

Explanation:

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In an exothermic reaction, heat is produced along with products. But in endothermic reaction, heat is absorbed. If the number of products is less than the sum of the enthalpies of the reactants, the reaction will be exothermic. If the number of products is more than the sum of the enthalpies of the reactants, the reaction is endothermic.
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3 years ago
What does condensation mean in the water cycle?
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4 0
3 years ago
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I DARE YALL TO JOIN THIS MEET CODE IS cdabauer JOIN THEN HURRY UP AND LEAVE AND YOU WILL GET BRAINLY​
Aleonysh [2.5K]

Answer:

nah but ill take points tho

Explanation:

4 0
2 years ago
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Calculate the value of AE for a system that loses 50 J of heat and has 150 J of work Performed on it by the surroundings.
gavmur [86]

Answer:

100 j

Explanation:

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4 0
3 years ago
Select the true statements about protein secondary structure.
netineya [11]

Answer:

The α‑helix is held together by hydrogen bonds between the amide N−H and C=O groups.

Disulfide bonds stabilize secondary structure.

Explanation:

Proteins have primary, secondary, tertiary and quartinary structures.

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7 0
3 years ago
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