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stira [4]
3 years ago
7

How can a change in color indicate a physical change?

Chemistry
2 answers:
liubo4ka [24]3 years ago
6 0
A temperature change maybe?
Inessa05 [86]3 years ago
6 0
Because you can see with your eyes that it changed
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Scientists believe that the Earth's orbit gradually changes from being elliptical to being nearly circular and then back to elli
IRISSAK [1]

Answer:

  solar energy received at the Earth's closest and farthest locations from the sun

Explanation:

The largest effect on climate is due to changes in received solar radiation. Changes in gravity or magnetic field have not been shown to have any significant effect on climate. Day/night differences are due to the tilt of the earth's axis, and have nothing to do with earth's orbit eccentricity.

The more circular the Earth's orbit, the less the difference in solar energy received at the Earth's closest and farthest locations from the sun.

3 0
3 years ago
What is the chemical formula for the compound ammonium phosphate? Use the list of polyatomic ions and the periodic table to help
Talja [164]

<u>Answer:</u> The correct answer is Option C.

<u>Explanation:</u>

We are given some polyatomic ions with their oxidation states. Polyatomic ions are defined as the ions which are formed from more than 2 atoms.

We need to find out the chemical formula for ammonium phosphate.

For this, the polyatomic ions used are:

Ammonium ion - NH_4^+

Phosphate ion - PO_4^{3-}

By using criss-cross method, the oxidation state of the ions are exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

Thus, the chemical formula for this compound is (NH_4)_3PO_4

Hence, the correct answer is Option C.

4 0
4 years ago
Read 2 more answers
8th grade science
morpeh [17]

Answer:

Copper and Iron

Explanation:

Metals, like copper and iron, are good conductors of heat; that is because  metals are bounded by a 'cloud' of free electrons and these electrons can carry easily kinetic energy through the metal

On the other hand, foam and wood are isolators, that is, they are bad conductors of heat.

4 0
3 years ago
Read 2 more answers
5.62531 how many significant figures are in this number
7nadin3 [17]

Answer:

5.62531  ...

Significant Figures: 6

Explanation:.

5.62531e+0

4 0
2 years ago
Which metal is more active than NI and less active than Zn?
Mademuasel [1]

Answer : The correct option is, (2) Cr (Chromium)

Explanation :

The reactivity series of metal are arranged of the reactivity from the highest to the lowest. Reactivity series is used to determine the products of the single displacement reactions. In the single displacement reaction, the most reactive metal displaces the least reactive metal.

From the given reactivity series we conclude that there are two metal (Mg and Cr) are more reactive metal than the Ni and there are two metal (Pb and Cr) are less reactive metal than the Zn. So, the Cr (Chromium) is the metal which is more active than Ni and less active than Zn.

Hence, the correct option is, (2) Cr

7 0
4 years ago
Read 2 more answers
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