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Blizzard [7]
2 years ago
5

Please answer quickly!!

Chemistry
1 answer:
FromTheMoon [43]2 years ago
5 0

Answer:

i do not no but i do no .nb dncvejx euvcir

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Objects that vibrate make energy. Which
kap26 [50]

Answer:

A sound

Explanation:

7 0
3 years ago
Read 2 more answers
A 5.00 g sample of a pure substance powder is heated, and the powder leaves 4.63g of a shiny, metallic liquid. Is the powder an
ElenaW [278]

Answer:

compound

Explanation:

We already know that the original substance was pure. If this substance was pure and it was powdery in nature then we have a footing to start from.

Secondly, a 4.93 g of shinny metallic liquid was left behind. This shinny metallic liquid must be an element.

Since there was a loss in mass during heating, it follows that there were other components of the pure powder.

If the reasoning stated above is correct, then the substance is a compound.

8 0
3 years ago
A sample of an unknown compound has a percent composition of 52.14% carbon, 13.13% hydrogen, and 34.73% oxygen. Which compounds
Artemon [7]
<h3>Answer:</h3>

                The two possible compounds are;

                            1) Dimethyl Ether H₃C--O--CH₃

                           2) Ethanol  H₃C--CH₂--OH

<h3>Solution:</h3>

Step 1: Calculate Moles of each Element;

                      Moles of C  =  %C ÷ At.Mass of C

                      Moles of C  =  52.14 ÷ 12.01

                      Moles of C  =  4.341 mol


                      Moles of H  =  %H ÷ At.Mass of H

                      Moles of H  =  13.13 ÷ 1.01

                      Moles of H  =  13.00 mol


                      Moles of O  =  %O ÷ At.Mass of O

                      Moles of O  =  34.73 ÷ 16.0

                      Moles of O  =  2.170 mol

Step 2: Find out mole ratio and simplify it;

                C                                        H                                     O

            4.341                                 13.00                              2.170

     4.341/2.170                      13.00/2.170                    2.170/2.170

               2                                      5.99                                    1

               2                                        6                                       1

Hence,  Empirical Formula  =  C₂H₆O

<h3>Result:</h3>

         As the molecular mass of compound is not given therefore, we can assume and guess the empirical formula to be the molecular formula. Hence, possible compounds are,

                            1) Dimethyl Ether H₃C--O--CH₃

                           2) Ethanol  H₃C--CH₂--OH

3 0
3 years ago
Which of the following best describes what happens when hydrogen and oxygen to form water?
Sever21 [200]

Atoms are combining to form molecules

6 0
3 years ago
11) An alkene x undergoes on ozonglysis and
steposvetlana [31]

Answer:

1)mix them

2)monomers and they function correctly that's why

3)chemical reaction

4)it slowly makes simple and useful substances and wait for it to sell that way we can know whether it is saturated or not.

3 0
3 years ago
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