Answer:
The answer to your question is 471.2 g
Explanation:
Data
moles of Cu(HCO₃)₂ = 2.54
mass of Cu(HCO₃)₂ = ?
Process
1.- Calculate the molar mass of Copper (II) bicarbonate
Cu(HCO₃)₂ = (1 x 63.5) + (2 x 1) + (2 x 12) + (6 x 16)
= 63.5 + 2 + 24 + 96
= 185.5 g
2.- Use proportions and cross multiplication to find the mass
185.5 g of Cu(HCO₃)₂ ------------- 1 mol
x ------------- 2.54 mol
x = (2.54 x 185.5) / 1
x = 471.2 g
Answer: C
Here is how I used Process of Elimination:
An hypothesis is your guess before you conduct the experiment.
An inquiry is when you ask for information.
A law is a statement based on repeated experiments.
The answer had to be conclusion.
Hope it helps!
25.71/(2.3*4.01*1.82) = 1.5316gcm^-3
Answer
a) : = +ve
b) : = -ve
c) : = +ve
d) : = +ve
Explanation:
Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.
a)
As solid is moving to ions form , randomness increases and thus sign of is positive.
b)
As gaseous reactants are converted to solid products , randomness decreases and thus sign of is negative.
c)
As liquid is changing to gas randomness increases and thus sign of is positive.
d)
As 8 moles of gaseous reactants are converted to 11 moles of gaseous products , randomness increases and thus sign of is positive.