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vova2212 [387]
2 years ago
11

Who placed all the elements in the right place according to their properties

Chemistry
1 answer:
REY [17]2 years ago
8 0
Dmitri Mendeleev Was the name of the guy you where looking for
You might be interested in
*
Marta_Voda [28]

Answer:

proton. neutrons and electrons

5 0
2 years ago
A chemistry student is given 250.0 mL of clear aqueous solution at 42 C. He is told an unknown amount of a certain compound X is
lara [203]

Answer:

No

Explanation:

The solubility of a solid in water refers to the amount of that solid that dissolves in water.

It is not possible to calculate the solubility of the solid because the student threw away the first precipitate that formed. We already have the volume of water, but having lost some mass of precipitate, it has become impossible to accurately determine the solubility.

Hence the answer provided above.

7 0
3 years ago
Pick the correct products for the following reaction acid + metal reaction: 2 HNO3 + Co -->
MrMuchimi

Answer:

2. Co(NO3)2 + H2

Explanation:

Hello,

In this case, we are evidencing a simple displacement reaction wherein the cobalt is able displace the hydrogen to produce cobalt (II) nitrate and gaseous hydrogen as a result of cobalt's higher activity:

2 HNO_3 + Co\rightarrow Co(NO_3)_2+H_2

Therefore, answer is 2. Co(NO3)2 + H2.

Best regards.

3 0
2 years ago
Read 2 more answers
I can't find the answer for number 9/10 pleas help
kondaur [170]
(10)an object  will continue  to travel at a constant speed unless acted by an unbalanced  force  according to newtons second law every force acted on a body has a equal and opposite reaction so the speed and the direction of the object will change.

(9) balanced force (i think so )

hope this is what you needed the 10th one is for understanding you can shorten it after reading and i think what i have written is not wrong :P:P:P;p:P:):):):D=) for the ninth one i am not sure but i think so :P:)=)


8 0
3 years ago
Read 2 more answers
Distinguish between the law of conservation of mass and the law of constant proportion
Rasek [7]
Laws of conservation of mass - It states that mass can neither created nor destroyed. The total mass before and after a chemical reaction remains constant. Laws of constant proportion - It states that in a chemical substance the elements are always present in a fixed proportion by their mass.
5 0
2 years ago
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