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3 years ago

Which statements describe functions of DNA? Select three options.

Chemistry

2 answers:

scZoUnD [109]3 years ago

8 0

Answer:

A.) DNA gives instructions on how to make keratin, the protein that makes up human hair and skin.

B.) DNA contains information about eye and fur color that is passed on from parents to kittens.

C.) DNA helps create substances that fight the bacteria that enter the body.

Explanation:

Took the test. Hope it helps! :)

Gekata [30.6K]3 years ago

3 0

Answer: A, B, D

Explanation:

IT IS THE ANSWER NO QUESTION

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Calculate the molarity of 1.60 L of a solution containing 8.53 g of dissolved KBr.

ozzi

0.044 M is the molarity of 1.60 L of a solution containing 8.53 g of dissolved KBr.

Explanation:

Data given:

volume of the solution = 1.60 litres

mass of KBr = 8.53 grams

atomic mass of KBr = 119.002 gram/moles (K = 39.09 g/mole + 79.9 g/mole)

number of moles =?

molarity of KBr solution =?

First the number of moles will be calculated by using the formula:

number of moles = $\frac{mass}{atomic mass of 1 mole}$

putting the values in the equation:

number of moles = $\frac{8.53}{119.002}$

number of moles = 0.071 moles of KBr

now molarity is calculated using the formula:

molarity = $\frac{number of moles}{volume in litres}$

putting the values in the equation:

molarity = $\frac{0.071}{1.6}$

= 0.044 M

molarity of KBr solution is 0.044 M

3 0

3 years ago

2 points) Now they feel it is best to have you identify an unknown gas based on its properties. Suppose 0.508 g of a gas occupie

Usimov [2.4K]

Answer: chlorine gas

Explanation:

mass = 0.508 g volume = 0.175 L

From ideal gas equation.

PV = nRT

(1.0 atm) × (0.175 L) = n × [0.0821 atm L / (mol K)] × [(273.2 + 25.0) K]

n = 1.0 × 0.175 / (0.0821 × 298.2) mol

n = 0.00715 mol

Molarmass= mass/mole

Molar mass of the gas = (0.508 g) / (0.00715 mol) = 71.0 g/mol

The molar mass of Cl₂ (chorine) = 35.5 × 2 g/mol = 71.0 g/mol

Hence, the gas is chlorine.

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3 years ago

How many grams of oxygen can be obtained from 5.00 g of KCIO3

zepelin [54]

${{{\sf{\green{1 \: g \: of \: \: kclo3 \: would \: \: yield \: .78335373 \: g \: of \: o2 \: thus \: 5 g \: \: of \: \: kclo3 \: \: would \: yield \: \: 5 \ \times 0.783353733 g \: \: of \: o2 \: \: or \: 4.0 g \: \: o2}}}}}$

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3 years ago

Which of the following statements is true of water in a solid state? Choose all that apply.

olganol [36]

B. Solid water conforms to the shape of its container.

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3 years ago

O que é transferência de Calor?

irinina [24]

Answer:

I speak English can someone translate

Explanation:

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3 years ago