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Grace [21]
2 years ago
11

When was the idea of a atom first devloped

Chemistry
1 answer:
bija089 [108]2 years ago
6 0

Answer:

Around 450 B.C.

Explanation:

The idea was forgotten until the 1800 when John Dalton re-introduced the atom.

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Which option describes the behavior of energy in exothermic reactions?
jok3333 [9.3K]

Answer:

The energy of the products is less than the energy of the reactants, so energy is released into the surrounding environment.

6 0
3 years ago
Read 2 more answers
Many people in South America are subsistence farmers. Subsistence farming is...
galben [10]

growing only enough crops for food to fed the family

Explanation:

subsistence farming is the practice of growing crops only for own use .. some developing countries are only doing farming for their personal use so they are in the stage of developing ..in a country like nepal we not being able to trade our farming .if we want to export then also we arenot getting the good market ..

8 0
3 years ago
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An aluminum block has a density of 2.70 g/mL. If the mass of the block is 24.60 g, find the volume of the substance.
harina [27]

Volume of a substance can be determined by dividing mass of the substance by its density.

That can be mathematical shown as:

Density=Mass/Volume

So, Volume=Mass/Density

Here mass of the substance given as 24.60 g

Whereas density of the substance is 2.70 g/mL

So,

Volume=Mass/Density

=24.6/2.7

=9.1 mL

So volume of the substance is 9.1 mL.

8 0
3 years ago
Na + CI2 =2NaC is It balanced
scoray [572]

Answer:

no, the correct answer is NaCI

Explanation:

you're welcome

3 0
3 years ago
Is gravity a matter??
algol13

Answer:

No, gravity isn't matter

Explanation:

Gravity is a <u>force</u> that attracts matter towards the center of a physical body with mass.

3 0
2 years ago
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