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lianna [129]
3 years ago
11

As the earth rotates on its axis, the constellations and stars in them appear to

Chemistry
1 answer:
wlad13 [49]3 years ago
6 0
Move or rotate as well since they stay in place and we move.
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What is made out of one atom
mestny [16]
Well i know water is made out of 2 but gold is made of 1 type of atom if that helps
3 0
4 years ago
What would the rate law be for the following reaction:
lana [24]

Answer:

C. Rate = k[H2]^2[O2]

Explanation:

Rate law only cares about REACTANTS. Since, rate law can only be determined experimentally, I am assuming the given reaction mechanism is elementary reaction from which we can write the rate law.

Only H2 and O2 are part of rate law since they are reactants and also the coefficient in front of H2 goes as exponent on rate law to indicate the order of H2 in the reaction.

Rate= k [H2]^2 [O2]

6 0
3 years ago
Astronomers send probes to other planets to take pictures of their surfaces. An astronomer thinks that briny water flows on Mars
aalyn [17]

Answer: the answer is B

Explanation:

3 0
3 years ago
Is the relationship between volume and pressure direct or indirect? Explain your<br> answer
Brilliant_brown [7]

Answer:

Boyle's Law is a relationship between pressure and volume. In this relationship, pressure and volume have an inverse relationship when temperature is held constant. If there is a decrease in the volume there is less space for molecules to move and therefore they collide more often, increasing the pressure.

Explanation:

6 0
3 years ago
A calorimeter contains 20.0 mL of water at 15.0 ∘C . When 1.50 g of X (a substance with a molar mass of 76.0 g/mol ) is added, i
dmitriy555 [2]

Answer:

ΔH(mix'g)= 42.3Kj/mole

Explanation:

ΔH = (mcΔT)water/moles X

m = mass(g) = 20ml x 1.00g/ml = 20 g

c = 4.184 j/g⁰C

ΔT = 25°C- 15°C = 10°C

moles X = (1.5g)/(76g/mole) = 0.0197 mole X

ΔH = (20g)(4.184j/g°C)(10°C)/(0.0197 mole X) = 42,300J/mole = 42.3Kj/mole (3 sig.figs.)  

8 0
4 years ago
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