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kolbaska11 [484]
3 years ago
14

What is the mass of 16.3 l of helium gas?

Chemistry
1 answer:
erma4kov [3.2K]3 years ago
5 0
 4.003 is the mass of helium gas


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What temperature is represented by the image of the thermometer
Andrei [34K]

Answer:

980C

Explanation:

but it need a scale tell me the scale

5 0
3 years ago
Write and balance a complete chemical reaction equation for the combustion of butane. Butane has carbon atoms. Butane has hydrog
Lilit [14]

Answer:

The balanced reaction is this:

2 C₄H₁₀ (g)  +  13 O₂(g) →  8 CO₂(g) +  10 H₂O (g)

Explanation:

Combustion is a chemical reaction whose reagents are oxygen, usually in excess and a hydrocarbon to generate carbon dioxide and water in the form of steam, as products.

Butane is considered as a reactant and it is a sort of alkane, in this case with 4 C (prefix but).

O₂ is needed for the complete combustion of butane.

5 0
3 years ago
What does the monomer unit of Polyester look like? And what’s its chemical formula?
AlladinOne [14]

Answer:

             The monomers of polyesters are,

                                  (i) A Dicarboxylic Acid

                                  (ii) A Dialcohol

Explanation:

                     As depicted from name polyester is a macromolecule which contains numerous ester functional groups. Ester is formed by the condensation of Carboxylic acid and alcohol as shown,

                            R-COOH  +  R'OH  →  RCOOR'  +  H₂O

Therefore, in order to utilize this reaction for the formation of long chain of polyesters then one can use a dicarboxylic compounds and dialcohol compounds. This will allow to propagate the chain length depending upon the requirement. Hence, the general reaction for the formation of polyester is shown below. The circle and rectangle specifies different moieties which imparts different characters to the polyester.

6 0
3 years ago
In a bottle of coke which would you expect to be higher, the concentration of H+ or the concentration of OH+? Why?
motikmotik

Answer: I don’t really know

Explanation:

I don’t know sorry

3 0
3 years ago
What is the molecular formula of a compound that is 51.02 % carbon, 13.80 % hydrogen, and 35.18 %
elena-14-01-66 [18.8K]

Answer:

Molecular formula = C₄H₁₂O₂

Explanation:

Given data:

Percentage of hydrogen = 13.80%

Percentage of carbon = 51.02%

Percentage of oxygen = 35.18%

Molecular formula = ?

Solution:

Number of gram atoms of H = 13.80 / 1.01 = 13.6

Number of gram atoms of O = 35.18 / 16 = 2.2

Number of gram atoms of C = 51.02 / 12 = 4.25

Atomic ratio:

            C                      :      H             :         O

           4.25/2.2           :     13.6/2.2     :       2.2/2.2

            2                      :        6          :        1

C : H : O = 2 : 6 : 1

Empirical formula is C₂H₆O.

Molecular formula:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

Empirical formula mass = C₂H₆O = 46 g/mol

n = 88 / 46

n = 2

Molecular formula = n (empirical formula)

Molecular formula = 2 (C₂H₆O)

Molecular formula = C₄H₁₂O₂

5 0
3 years ago
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