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kirill [66]
3 years ago
7

Particle quantity/number of Cu(NO3)2

Chemistry
1 answer:
Murrr4er [49]3 years ago
8 0

Answer:

Cupid nitrate is what I'm going for

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What is the molality of a solution of water and kcl if the freezing point of the solution is –3mc030-1.jpgc?
Natasha_Volkova [10]
We will use the expression for freezing point depression ∆Tf
     ∆Tf = i Kf m
Since we know that the freezing point of water is 0 degree Celsius, temperature change ∆Tf is 
     ∆Tf = 0C - (-3°C) = 3°C 
and the van't Hoff Factor i is approximately equal to 2 since one molecule of KCl in aqueous solution will produce one K+ ion and  one Cl- ion:
     KCl → K+ + Cl- 
Therefore, the molality m of the solution can be calculated as 
     3 = 2 * 1.86 * m
     m = 3 / (2 * 1.86)
     m = 0.80 molal
4 0
3 years ago
When a lithium ion and nitrate ion combine, the result is:
maxonik [38]
LiNO3; nitrate has a charge of -1, and lithium has a charge of +1
7 0
3 years ago
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What mass of natural gas (ch4) must you burn to emit 272 kj of heat?
balandron [24]
CH4 + 2 O2 ---> CO2 + 2 H2O Q = 891,6 kJ / mol CH4

1 mol CH4 = 16 g

16 g ---- 891,6 kJ
x g ----- 272 kJ

x = 272 kJ × 16 g / 891,6 kJ = 4,88 g

You must burn 4,88 g of CH4.

:-) ;-)
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__________ is designed to protect you from injuries to your head, face, eyes, ears, hands, feet, respiratory tract, and body. A.
Nadusha1986 [10]
_________ is designed to protect you from injuries to your head, face, eyes, ears, hands, feet, respiratory tract, and body
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hope this helps :D
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How many kilojoules are released when 12.0 g of propane, C3H8, reacts?
NeTakaya

Answer:

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