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Vanyuwa [196]
3 years ago
9

If an object has a volume of 2 millimeters and a mass of 10 grams, calculate the density of the object. (4 points)

Chemistry
1 answer:
kow [346]3 years ago
3 0
Density = g/mL

10 g / 2 mL = 5 g/mL


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What is the molarity of 200. mL of solution containing 4.50 moles of ZnCl2?
MariettaO [177]

Answer:

Molarity of solution = 0.9 M

Explanation:

Given data:

Moles of ZnCl₂ = 4.50 mol

Volume of solution = 200 mL

Molarity of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Now we will convert the volume in L.

200 mL×1 L/1000 mL = 0.2L

M = 4.50 mol / 0.2 L

M = 0.9 M

4 0
3 years ago
Determine the value of the equilibrium constant, Kgoal, for the reactionN2(g)+H2O(g)⇌NO(g)+12N2H4(g), Kgoal=?by making use of th
Black_prince [1.1K]

Answer:

K_{goal}=1.793*10^{-33}

Explanation:

N2(g)+O2(g)⇌2NO(g), K_1 = 4.10*10^{-31}

N2(g)+2H2(g)⇌N2H4(g), K_2 = 7.40*10^{-26}

2H2O(g)⇌2H2(g)+O2(g), K_3 = 1.06*10^{-10}

If we add above reaction we will get:

2N2(g)+2H2O(g)⇌2NO(g)+N2H4(g)                     Eq (1)

Equilibrium constant for Eq (1) is K_1*K_3*K_3

Divide Eq (1) by 2, it will become:

N2(g)+H2O(g)⇌NO(g)+1/2N2H4(g)                       Eq (2)  

Equilibrium constant for Eq (2) is (K_1*K_3*K_3)^{1/2}

Equilibrium constant =K_{goal}= (K_1*K_2*K_3)^{1/2}\\K_{goal}= (4.10*10^{-31} *7.40*10^{-26}*1.06*10^{-10})^{1/2}\\K_{goal}=1.793*10^{-33}

7 0
3 years ago
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Answer:

GG= Green Gg= Green Gg=yellow

Explanation:

Whenever there is a dominant allele it will ALWAYS show, the recessive alleles or lowercase letters show when they are paired together

3 0
3 years ago
In scientific notation the radius of the sun is ......times 10..... kilometers
Alborosie

Answer:

The radius of the sun is 7x10^5 kilometers, and that of the Earth is about 6.4x10^3 kilometers. Use scientific notation to show that the Sun's radius is about 100 times the Earth's radius. The Sun's radius is 10^10 the Earth's radius.

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Would you expect trna or mrna to be more extensively hydrogen bonded? Why?
AveGali [126]

Answer:

tRNA

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Messenger RNA is formed by a single chain of nucleotides, in contrasting to DNA, that has a double helix connoting several hydrogen bonds between chains.  In this case mRNA doesn't compete with DNA hydrogen bonds, because it appears in a single chain.

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