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melomori [17]
3 years ago
10

Tanner adds 10 grams of dry sand to 100 milliliters of warm salt water. This mixture is stirred and placed on a table. When Tann

er checks five minutes later, what will he most likely find.
Chemistry
2 answers:
Ivenika [448]3 years ago
8 0
He will most likely find that  the sand has sunken to the bottom because the molecules in sand are to powerful to break apart and disslove.
Arisa [49]3 years ago
6 0
Tanner is going to see that the sand and salt have sunk to the bottom of the water and settled there and the rest of the water is clear.
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A compound contains 24.27% C, 4.07% H and 71.65% Cl. The molar mass is about 99g.
Schach [20]

Answer:

Molecular formula = C₂H₄Cl₂

Explanation:

Molecular formula:

Molecular formula consist of symbols of elements present in compound with numbers of atoms of each element in subscript.

Empirical formula:

It is the simplest formula gives the ratio of atoms of different elements in small whole number .

Given data:

Percentage of hydrogen = 4.07%

Percentage of Cl = 71.65%

Percentage of carbon = 24.27%

Molar mass = 99 g/mol

Molecular formula = ?

Solution:

Number of gram atoms of H = 4.07 / 1.01 = 4.0

Number of gram atoms of Cl = 71.65 / 35.5 = 2.0

Number of gram atoms of C = 24.27 / 12 = 2.0

Atomic ratio:

           H              :          C             :         Cl

          4/2            :        2/2            :       2/2

           2               :          1             :        1

C : H : Cl = 1 : 2 : 1

Empirical formula is CH₂Cl.

Molecular formula:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

Empirical formula mass  = 12+1×2+ 35.5 = 49.5

n =  99/49.5

n = 2

Molecular formula = n (empirical formula)

Molecular formula = 2 ( CH₂Cl)

Molecular formula = C₂H₄Cl₂

5 0
3 years ago
Which of the following is not involved in bringing materials into cells?
Ket [755]

Answer:

b

Explanation:

jskekekeoeodofkkdkwkwllelwwlww

8 0
3 years ago
Read 2 more answers
The combustion of propane may be described by the chemical equation C 3 H 8 ( g ) + 5 O 2 ( g ) ⟶ 3 CO 2 ( g ) + 4 H 2 O ( g ) C
Kipish [7]

Answer: 72 grams of O_2(g) are needed to completely burn 19.7 g C_3H_8(g)

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Putting in the values we get:

\text{Number of moles}=\frac{19.7g}{44g/mol}=0.45moles

C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(g)

According to stoichiometry:

1 mole of C_3H_8 requires 5 moles of oxygen

0.45 moles of C_3H_8 require= \frac{5}{1}\times 0.45=2.25 moles of oxygen

Mass of O_2=moles\times {\text {Molar mass}}=2.25\times 32=72g

72 grams of O_2(g) are needed to completely burn 19.7 g C_3H_8(g)

7 0
3 years ago
It is possible for a particular element to have various number of neutrons
luda_lava [24]
Yes, it <span>is possible for a particular element to have various number of neutrons, and that would make it have an isotope. </span>
4 0
4 years ago
1. Which type of reaction is the reverse of a decomposition reaction?
Serjik [45]

\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}

Actually Welcome to the Concept of the Chemistry.

The reaction that Is opposite of the decomposition is

==> Synthesis Reaction.

==> Catalyst always Speeds up any reaction, so that it quickly reaches to it's Equilibrium point and gets stabilize.

8 0
3 years ago
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