Answer:
True
Explanation:
Both work because an element would be pure and compounds can be split into elements. This will work unless the substance isnt chemcially pure, but in this case it is so the answer would be true.
The Law of Conservation says that matter cannot be created or destroyed, all matter is re-used. Going into mass here, which does relate, the product's mass will always equal the mass of the reactants.
Answer:
0.631 grams is the theoretical yield of solid copper (Cu) that can be recovered at the end of the experiment
Explanation:
The concentration of the solution is given by :
![[C]=\frac{\text{Moles of compound}}{\text{Volume of solution in Liters}}](https://tex.z-dn.net/?f=%5BC%5D%3D%5Cfrac%7B%5Ctext%7BMoles%20of%20compound%7D%7D%7B%5Ctext%7BVolume%20of%20solution%20in%20Liters%7D%7D)
We have:
Concentration of copper (II) nitrate solution = ![[Cu(NO_3)_2]=2.41 M](https://tex.z-dn.net/?f=%5BCu%28NO_3%29_2%5D%3D2.41%20M)
The volume of solution = 4.12 mL
1 mL= 0.001 L
Moles of copper (II) nitrate in solution = n
Moles of copper (II) nitrate in solution = 0.0099292 mol
1 Mole of copper(II) nitrate has 1 mole of copper then 0.0099292 moles of copper(II) nitrate will have :
Mass of 0.0099292 moles of copper:
This mass of copper present in the solution is the theoretical mass of copper present in the given copper(II) nitrate solution.
0.631 grams is the theoretical yield of solid copper (Cu) that can be recovered at the end of the experiment
Answer:
The mole ratio from D to A is 3:1:1:2.
Explanation:
Chemical reaction:
A + B → C + D
Balanced chemical equation
2A + B → C + 3D
This general reaction shows that two mole of reactant A and one mole of reactant B react to form one mole of product C and three mole of product D.
Coefficient with reactants and products:
A 2
B 1
C 1
D 3
thus the mole ratio from D to A is 3:1:1:2.
Answer:
stars are born in vast clouds of gas and dust. stars spend most of their lives on the main sequence fusing hydrogen gas to helium gas. stars eventually swell up to form a red giant star. stars like the Sun end their lives as planetary nebulae and white dwarfs.
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