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galben [10]
3 years ago
11

Covert 645g of CuCl2 to mole

Chemistry
1 answer:
shepuryov [24]3 years ago
8 0

Answer:

kombinasi kuda-kuda belakang

Explanation:

maaf kalau salahnya

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In chemical reaction atoms are what?
user100 [1]

Answer:

<h3>In chemical reaction atoms are reactants </h3>
5 0
3 years ago
A sample of Xe gas is observed to effuse through a pourous barrier in 4.83 minutes. Under the same conditions, the same number o
Solnce55 [7]

Answer:

28.93 g/mol

Explanation:

This is an extension of Graham's Law of Effusion where \frac{R1}{R2} = \sqrt{\frac{M2}{M1} } = \frac{t2}{t1}

We're only talking about molar mass and time (t) here so we'll just concentrate on \sqrt{\frac{M2}{M1} } = \frac{t2}{t1}. Notice how the molar mass and time are on the same position, recall effusion is when gas escapes from a container through a small hole. The time it takes it to leave depends on the molar mass. If the gas is heavy, like Xe, it would take a longer time (4.83 minutes). If it was light it would leave in less time, that gives us somewhat an idea what our element could be, we know that it's atleast an element before Xenon.

Let's plug everything in and solve for M2. I chose M2 to be the unknown here because it's easier to have it basically as a whole number already.

\sqrt{\frac{M2}{131} } = \frac{2.29}{4.83}

The square root is easier to deal with if you take it out in the first step, so let's remove it by squaring each side by 2, the opposite of square root essentially.

(\sqrt{\frac{M2}{131} } )^2= (\frac{2.29}{4.83})^2

{\frac{M2}{131} } = (0.47)^2

{\frac{M2}{131} } = 0.22

M2= 0.22 x 131

M2= 28.93 g/mol

8 0
2 years ago
Proposing an explanation for the changing colors of the sky is an example of a(n)
lara [203]

Answer : Hypothesis.

Explanation : Hypothesis is defined as the supposition or proposed explanation which can be made on the basis of limited available evidence as a starting point for further investigation. Here, in this question the proposed explanation for the changing colors of the sky is an example of a hypothesis.

A hypothesis has to be supported with scientific experiments which are reproducible by several experiments and test results have to be valid to be called as a scientific theory.

8 0
3 years ago
Read 2 more answers
What is the number of protons of oxygen
Deffense [45]

Answer: I believe it's 8

Explanation: The oxygen atom has therefore 8 neutrons, 8 protons and 8 electrons.

8 0
3 years ago
Read 2 more answers
1.Which is the lowest level of organization for the system in a human
elena55 [62]

Answer:

brain cell

Explanation:

hope this helps :)

5 0
3 years ago
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