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3 years ago

Which of the following depicts a molecule of DNA? A, B, C, D?

Chemistry

1 answer:

Ghella [55]3 years ago

7 0

Answer:

D. I've watched Jurassic park uwu

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The equilibrium 2NO(g)+Cl2(g)⇌2NOCl(g) is established at 500 K. An equilibrium mixture of the three gases has partial pressures

Galina-37 [17]

Answer:

Kp = 41.53

Kc = 1.01

Explanation:

To calculate the equilibrium constant in terms of pressure, what we simply do is to use the equilibrium pressure raised to the power of the number of moles. What we are saying in essence is this:

Kp = [NOCl]^2/[NO]^2[Cl]

Kp= [0.25]^2/[0.174][0.093]^2 = 41.53

Kp = Kc (RT)^Dn

Hence, Kc = Kp/[RT]^(delta n )^-1

n = sum of the number of moles of products minus the sum of the number of moles of reactants= 2-3 = -1 in this case

Kc = 41.53/(0.0821 * 500)^1

Kc = 1.01

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3 years ago

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What is the purpose of a buffer?

docker41 [41]

buffers resist changes in pH levels, they are used to regulate biological functions that only occur at certain pH levels.

8 0

3 years ago

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Structure of 2,3-dimethylheptane

olga55 [171]

Answer:

Please find the structure of the hydrocarbon in the attachment section and details on how to draw it in the explanation section.

Explanation:

Heptane is a member of the alkane group, which has a general formula of CnH2n+2. If n in heptane is 7, this means that the chemical formula for heptane will be C7H16 i.e.

= C7H2(7) + 2

= C7H14+2

= C7H16

C7H16 is the chemical formula for heptane, which is a linear hydrocarbon with 7 carbon atoms and 16 hydrogen atoms. However, in the name of the hydrocarbon compound given in the question: 2,3-dimethylheptane;

- Two methyl groups (CH3) has a substituted two hydrogen atoms specifically at carbon 2 and 3 respectively. Therefore, the new chemical formula of 2,3-dimethylheptane will be: C7H14(CH3)2

Please find the structural formula of the compound; 2,3-dimethylheptane as an attachment.

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3 years ago

Balancing chemistry equations

kaheart [24]

Because you've added coefficients to the molecules on the right side of the equation, the number of oxygen atoms has changed. ...Add a coefficient of 5 to the oxygen molecule on the left side of the equation. ...C3H8 + 5O2 --> 4H2O + 3CO2.The carbon, hydrogen, and oxygen atoms are balanced

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3 years ago

A sample of sulfur has a mass of 232 grams. How many moles of sulfur are in the sample?

Anna007 [38]

Sulfur has a molar mass of 32.1 g/mole. So 232 g S / 32.1 g S = 7.22 moles

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4 years ago

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