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Svetlanka [38]
3 years ago
12

Matter that has a uniform and defined composition is called a​

Chemistry
1 answer:
Fittoniya [83]3 years ago
6 0
Answer - A substance is matter that has a uniform and definite composition. All samples of substances, sometimes called pure substances, have identical properties.
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Many people think that summer is warmer because the earth is closer to the sun at that time of year. explain why
Marysya12 [62]
Summer days are warmer because the path of the sun is longer and we have more direct sunlight during that time
5 0
3 years ago
Balance the 2 chemical equation below: 1) _____H2 + _____02 ---> _____H20 2) _____CH4 + _____Cl2 ---> _____CCl4 + _____HCl
sergij07 [2.7K]

Answer:

1.)    2H2  +  O2  --->  2H2O

2.)   CH4  +  4Cl2 --->  CCl4  +  4HCl

Explanation:

In order to balance the equation, you have to make sure there are the same amount of each element on both sides.

Ex (#1).  By adding the coefficients infront of H2 and H20, You now have 4 hydrogen's and 2 oxygens on the left side as well as 4 hydrogens and 2 oxygens on the right side.

Sorry if that's confusing, but hope this helps! :)

6 0
3 years ago
23. The cell has a
andrew11 [14]
Then that would be 100% all together I believe
5 0
1 year ago
Match the element with its description. Match Term Definition Sodium A) Has properties of both metals and nonmetals Silicon B) H
Novosadov [1.4K]

Answer:

Sodium - malleable, soft, and shiny

Silicon - has properties of both metals and nonmetals

Bromine - highly reactive gas

Argon - non-reactive gas

Explanation:

Sodium is an alkaline metal. Just like other alkaline metals, it's malleable, soft, and shiny.

Silicon is a metalloid. Metalloids are elements that have properties of both metals and nonmetals.

Bromine a highly reactive chemical element. It is a fuming red-brown liquid at room temperature that evaporates to form a similarly coloured gas.

Argon is a noble gas. Just like other noble gases, it's non-reactive.

8 0
3 years ago
Why does ice get colder when you melt it?
galina1969 [7]
It doesn't?

Heat transfers from hot objects to cold objects and for ice to melt it has to increase the temperature.
8 0
3 years ago
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