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3 years ago

The statement “traits are passed from parents to offspring independently of one another” is ?

Chemistry

1 answer:

vampirchik [111]3 years ago

6 0

Heredity maybe? im not really sure, thats all i could think of

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How many milliliters of C5H8 can be made from 366 mL C5H12 ?

zlopas [31]

The number of Ml of C₅H₈ that can be made from 366 ml C₅H₁₂ is 314.7 ml of C₅H₈

<u><em>calculation</em></u>

step 1: write the equation for formation of C₅H₈

C₅H₁₂ → C₅H₈ + 2 H₂

Step 2: find the mass of C₅H₁₂

mass = density × volume

= 0.620 g/ml × 366 ml =226.92 g

Step 3: find moles Of C₅H₁₂

moles = mass÷ molar mass

from periodic table the molar mass of C₅H₁₂ = (12 x5) +( 1 x12) = 72 g/mol

moles = 226.92 g÷ 72 g/mol =3.152 moles

Step 4: use the mole ratio to determine the moles of C₅H₈

C₅H₁₂:C₅H₈ is 1:1 from equation above

Therefore the moles of C₅H₈ is also = 3.152 moles

Step 5: find the mass of C₅H₈

mass = moles x molar mass

from periodic table the molar mass of C₅H₈ = (12 x5) +( 1 x8) = 68 g/mol

= 3.152 moles x 68 g/mol = 214.34 g

Step 6: find Ml of C₅H₈

=mass / density

= 214.34 g/0.681 g/ml = 314.7 ml

8 0

2 years ago

The SI unit of pressure is the ______________.

steposvetlana [31]

The answer is Pascal

5 0

2 years ago

Read 2 more answers

1. A sample of polystyrene is found to have a number-average molar mass of 89,440 g mol−1 . Neglecting contributions from end gr

Snowcat [4.5K]

Answer:

The weight-average molar mass of polystyrene is 134,160 g/mol.

Explanation:

Molar mass of the monomer styrene , $C_8H_8$ , M=104 g/mol

Given , number average molar mass of the polymer , M'= 89,440 g/mol

Degree of polymerization = n

$n=\frac{M'}{M}=\frac{89,440 g/mol}{104 g/mol}=860$

The weight-average molar mass = $M_{avg}=?$

Molar mass dispersity is ratio of weight-average molar mass to the number average molar mass of the polymer.

$\text{Molar mass dispersity}=\frac{M_{avg}}{M'}$

$1.5=\frac{M_{avg}}{89,440 g/mol}$

$M_{avg}=89,440 g/mol\times 1.5 = 134,160 g/mol$

The weight-average molar mass of polystyrene is 134,160 g/mol.

8 0

2 years ago

How many grams of sodium chloride decompose to yield 15 grams of chlorine gas?

defon

Answer:

24.6g of NaCl

Explanation:

Expression of the reaction:

2NaCl → 2Na + Cl₂

Given parameters:

Mass of Cl₂ = 15g

Unknown:

Mass of NaCl = ?

Solution:

To solve this problem, we have to use mole relationships.

Find the number of moles of the mass of the given specie;

Number of moles = $\frac{mass}{molar mass}$

Molar mass of Cl₂ = 2(35.5) = 71g/mol

Number of moles = $\frac{15}{71}$ = 0.21mole

Now;

From the balanced reaction equation;

1 mole of Cl₂ is produced from 2 moles of NaCl;

0.21 mole of Cl₂ will be produced from 0.21 x 2 = 0.42mole of NaCl

So,

Mass of NaCl = number of moles x molar mass

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

Mass of NaCl = 0.42 x 58.5 = 24.6g of NaCl

8 0

2 years ago

Define the following terms: i) Rigidity ii) Compressibility and iii) Density

Nutka1998 [239]

Rigidity is the inability to bent or be force out of shape while compressibility is the ability to be flattened, pressed or squeezed into a smaller piece.
density is the degree of compactness of a substance.

3 0

2 years ago