2 years ago

What is an experiment that can verify that new substances are formed and heat is released or absorbed during a chemcal reaction?

1 answer:

Vilka [71]2 years ago

8 0

An exothermic reactions experiment and endothermic reactions experiment.

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Nimfa-mama [501]

I think the answer might be B but i’m not positive

5 0

3 years ago

jeyben [28]

I would say d but I’m not sure

8 0

3 years ago

Yuri [45]

Answer:

its already in scientific notation form however its ordinary or real form is -0.005682

Explanation:

scientific notation

when a number is expressed with some power of 10 multiplied by a number between 1 to 10 is called scientific notation

4 0

2 years ago

Darina [25.2K]

Answer:

Calcium(Ca)

Explanation:

Atomic radius is the distance from the nucleus of an atom the outermost energy shell or energy level.
The atomic radii of metals are greater than the ionic radii since metals form ions by losing electrons.
Calcium atom has a larger atomic radius compared to magnesium atom because it has more energy levels. Calcium atoms have four energy levels while magnesium atoms have three energy levels.

7 0

3 years ago

Svetlanka [38]

Answer: 8500 J lost or -8500 J

Explanation:

q=cmt

t=375-26

t=349

q=0.38(64)(349)

q=8487.68 J

Answer must have 2 sig figs, which means it rounds to 8500 J.

7 0

3 years ago