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KengaRu [80]
4 years ago
13

Please help me urgent!!! For 20 points ... I really need help This is for grade 7.

Chemistry
1 answer:
worty [1.4K]4 years ago
5 0
What are you supposed to do
exactly? 
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Name and define the quantity represented by H​
Evgesh-ka [11]

Answer:

Molar enthalpy change, the enthalpy change for one mole of a pure substance

Explanation: i think

4 0
3 years ago
A change in the properties of matter that does not change the identity of the substance is:
Ugo [173]
No, the correct answer is B. Physical change because the identity of the substance does not change. 
For example, if you take a piece of paper and tear it in half you actually changed its property because now those pieces of paper have half the weight and and size that they did before you did anything. Now you know its a physical change because its still paper all you have done is change the physical appearance.
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6 0
4 years ago
Read 2 more answers
Lakes can disappear due to?
stich3 [128]

Answer:

Lakes can vanish due to natural processes and human activity. Bacteria break down lake species' bodies and release nutrients into the water when they die. Eutrophication is the accumulation of nutrients in a lake over time. Lakes and rivers all throughout the world have dried up as a result of rising water demand and a warmer environment. Overpumping of aquifers and excessive diversion of water from rivers.

༼つ ◕_◕ ༽つ  Gimme brainliest

Please

6 0
2 years ago
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Your general impression suggests that your immediate action should be to: ____.
Lynna [10]

Your general impression suggests that your immediate action should be to call for additional help. The correct option is a.

<h3>What is immediate action?</h3>

Immediate actions are the actions that are taken without taking any time. These actions are taken when there is no time to think, and you should immediately think about the actions. The emergency condition needs immediate help.

During the time of general impression, one should immediately call for additional help. Additional people will give you suggestions for the problem.

Thus, the correct option is a. call for additional help.

To learn more about immediate action, refer to the link:

brainly.com/question/28084658

#SPJ4

6 0
1 year ago
How many unpaired electrons does boron have
never [62]

In the ground state, only one. But for bonding, all three valence electrons are used, and the atom acquires a slightly excited state.

4 0
3 years ago
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