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Romashka [77]
2 years ago
7

15 points!

Chemistry
2 answers:
irina [24]2 years ago
7 0

Answer:

65

Explanation:

marshall27 [118]2 years ago
4 0

Answer:

C. To make it possible for others replicate experiment

Explanation:

I GOT IT CORRECT ON THE TEST :)

Have a good day

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How do you determine if an element is metal or non-metal?
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Answer: If the outermost shell has 1–4 electrons, it is a metal.

If the outermost shell has 5–7 electrons, it is a non-metal.

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3 years ago
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Jim and Jan were racing in a 400 meter event. Jim ran the race in 44.32 seconds. Jan ran the race in 42.21 seconds. Calculate th
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Answer:

2.11

Explanation:

44.32- 42.21=2.11

Hope this helps

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In the periodic table, a set of properties repeats from
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in the periodic table, a set of properties repeats from row to row

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Draw relative enthalpy diagrams showing the relationship between the enthalpy ofhydration, lattice enthalpy, and the solvation e
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Complete Question:

The complete question is on the first uploaded image

Answer:

The solution is on the second uploaded image

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4 0
3 years ago
Consider the balanced equation of K I KI reacting with P b ( N O 3 ) 2 Pb(NOX3)X2 to form a precipitate. 2 K I ( a q ) + P b ( N
professor190 [17]

Answer: 50.7 grams

Explanation:

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

a) moles of KI

\text{Number of moles}=molarity\times {\text {Volume in L]}=0.417M\times 0.528L=0.220moles

The balanced chemical equation is:

2KI(aq)+Pb(NO_3)_2(aq)\rightarrow PbI_2(s)+2KNO_3(aq)

KI is the limiting reagent as it limits the formation of product and Pb(NO_3)_2 is in excess.

According to stoichiometry :

2 moles of KI give =  1 mole of PbI_2

Thus 0.220 moles of KI give=\frac{1}{2}\times 0.220=0.110moles  of PbI_2

Mass of PbI_2=moles\times {\text {Molar mass}}=0.110moles\times 461.01g/mol=50.7g

Thus 50.7 g of PbI_2 will be formed.

6 0
3 years ago
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