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2 years ago

A control in an experiment

Chemistry

1 answer:

ser-zykov [4K]2 years ago

4 0

<h3>Changes with the independent variable...</h3>

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Determine the number of atoms of O in 92.3 moles of Cr3(PO4)2

Irina18 [472]

739 is the number of atoms of O in 92.3 moles of Cr3(PO4)2.

Explanation:

Molecular formula given is = Cr3(PO4)2

number of moles of the compound is 92.3 moles

number of 0 atoms in 92.3 moles =?

From the chemical formula 1 mole of the compound has 8 atoms of oxygen

So, it can be written as

1 mole Cr3(PO4)2 has 8 atoms of oxygen

92.3 moles of Cr3(PO4)2 has x atoms of oxygen

$\frac{8}{1}$ = $\frac{x}{92.3}$

x = 8 x 92.3

x = 738.4 atoms

There will be 739 oxygen atoms in the 92.3 moles of Cr3(PO4)2.

4 0

3 years ago

Lucy wants to attach a goal cost to each of her life goals. Why might she do this?

Natasha2012 [34]

Answer:

So she can have something to reach or look forward to.

Explanation:

none

8 0

3 years ago

What is the balanced chemical equation for potassium and chlorine which form potassium chloride

ArbitrLikvidat [17]

Potassium metal + Chlorine Gas --------> Potassium Chloride
The chemical equation using symbols and formula is
K (s) + Cl2 (g) ---------> 2KCl (s)

3 0

2 years ago

Read 2 more answers

Match the part of the wave to its description.

Alex17521 [72]

Answer:

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2 years ago

Read 2 more answers

State what would be observed when the following pairs of reagents are mixed in a test tube.

Mandarinka [93]

Answer:

(i). C6H2COOH and Na2CO3(aq)

observation: Bubbles of a colourless gas (carbon dioxide gas)

(ii) CH3CH2CH2OH and KMnO4 /H

observation: The orange solution turns green.

[This is because oxidation of propanol to propanoic acid occurs]

(iii) CH3CH2OH and CH3COOH + conc. H2SO4

observation: A sweet fruity smell is formed.

[This is because an ester, diethylether is formed]

(iv) CH3CH = CHCH3 and Br2 /H2O

observation: a brown solution is formed.

4 0

2 years ago