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11Alexandr11 [23.1K]
3 years ago
7

I need heLp ASAP

Chemistry
2 answers:
vredina [299]3 years ago
6 0

Answer:

sunspots

Explanation:

because i got it right on the test.

Mandarinka [93]3 years ago
4 0

Answer:

Photosphere

Explanation:

Because it is the visible surface of the sun we are most familiar with.

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Differences between hypothesis and theory​
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Answer:

A hypothesis is either a suggested explanation for an observable phenomenon, or a reasoned prediction of a possible causal correlation among multiple phenomena. In science, a theory is a tested, well-substantiated, unifying explanation for a set of verified, proven factors.

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3 years ago
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Which of these processes removes carbon from
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Answer is c photosynthesis
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2 years ago
An isotope of an element has the following symbol: 131 I How many electrons does it
WINSTONCH [101]

Answer:

D

Explanation:

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5 0
2 years ago
Why is an atom regarded as electrically unstable​
meriva

Answer: An atom can be considered unstable in one of two ways. If it picks up or loses an electron, it becomes electrically charged and highly reactive. Such electrically charged atoms are known as ions. Instability can also occur in the nucleus when the number of protons and neutrons is unbalanced.

Explanation:

5 0
3 years ago
12.A piece of magnesium is in the shape of a cylinder with a height of 5.62 cm
yaroslaw [1]

Answer:

Density, d = 1.779 g/cm³

Explanation:

The density of a material is given by its mass per unit volume.

Here, height of a piece of magnesium cylinder, h = 5.62 cm

Its diameter, d = 1.34 cm

Radius = 0.67 cm

Volume of he cylinder,

V=\pi r^2 h\\\\\text{Putting the value of r and h, we get :}\\\\V=(\pi \times (0.67)^2\times 5.62)\ cm^3

d=\dfrac{m}{V}\\\\d=\dfrac{14.1\ g}{(\pi \times (0.67)^2\times 5.62)\ cm^3}\\\\d=1.779\ g/cm^3

So, the density of the sample is 1.779 g/cm³.

4 0
2 years ago
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