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Annette [7]
2 years ago
7

You give a sample containing .90 moles of a substance

Chemistry
1 answer:
vampirchik [111]2 years ago
3 0
1 mole Cu ------------------ 6.02x10²³ atoms
0.90 moles Cu ------------ ??

0.90 x ( 6.02x10²³ ) / 1 =

= 5.41x10²³ atoms


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3 years ago
How much heat is lost when 575 g of molten iron at 1825 K becomes solid at 1181 K and cools to 293 K?
meriva
Answer is: -963,8 kJ.
Q₁ = m(Fe) · C · ΔT₁.
C - specific heat capacity of liquid iron, C(Fe) = 0,82 J/g°<span>C.
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7 0
3 years ago
Read 2 more answers
What is the molarity of a solution containing 501mL with 35g NaCl
Vesna [10]

Answer:

Data:

mass of solute: 35g of NaCl

m.mass of solute: 58g/mol

volume of solution: 501mL

Molarity=?

Explanation:

501ml = 0.5dm3

M= g of solute/m.mass of solute*vol of solution

M= 35/58*0.5

M=1.20

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3 years ago
What are the 3 types of evidence of Pangaea? *
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Explanation:

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