Answer: 109.5g
Explanation:
Mg + 2HCl —> MgCl2 + H2
From the equation,
1mole of Mg required 2moles of HCl
Therefore 1.5moles of Mg will require = 1.5 x 2 = 3 moles of HCl.
Molar Mass of HCl = 1+35.5 =36.5g/mol
Mass conc. Of HCl = 3 x 36.5 = 109.5g
Use stoich
3.01 x 10^23 Au* 1m / 6.022 x 10^23
= .499m Au
Reaction of combustion of butane is a as follows:
2 C₄H₁₀ + 13 O₂ --> 8 CO₂ + 10 H₂O:
As it can be seen from the equation that 2 mole of butane produce= 8 mole of butane produce
1 mole of butane produce= 4 mole of butane produce
1.60 g of butane=
= 0.027 mole of butane
0.027 mole of butane =
= 0.108 mole of CO₂.
Using ideal gas equation,
Here,
P denotes pressure
V denotes volume
n denotes number of moles of gas
R denotes gas constant
T denotes temperature
The values at STP will be:
P=1 atm
T=23+273 K = 296 K
R=0.0821 atm L mol ⁻¹
Number of moles of gas, n= 0.018
Putting all the values in the above equation,
V= 2.62 L
So the volume will be 2.62 L
Answer:
We need to add 900 mL of water.
Explanation:
To know the amount of water to add first we need to calculate the concentration of KOH when the pH is 12 and when is 11:
When pH = 12 (initial):
When pH = 11 (final):
Now, by using the following equation we can find the volume of the solution to achieve a pH = 11:
Finally, to bring 100 mL of the initial solution to 1000 mL we need to add the following amount of water:
Therefore, we need to add 900 mL of water.
I hope it helps you!
Answer:
Paper has been changed chemically when it is torn into pieces.
Particles of matter move more quickly when their temperature gets cooler.
(this two are correct)
Explanation: