Answer:
27.22dm³
Explanation:
Given parameters:
number of moles = 1 mole
temperature = 50°C, in K gives 50+273 =323K
Pressure = 98.6kpa in atm, gives 0.973atm
Unknown:
Volume of the gas = ?
Solution:
Since the unknown is the volume of gas, applying the ideal gas law will be appropriate in solving this problem.
The ideal gas law is mathematically expressed as;
Pv = nRT
where P is the pressure of the gas
V is the volume
n is the number of moles
R is the gas constant
T is the temperature
Input the parameters and solve for V;
0.973 x V = 1 x 0.082 x 323
V = 27.22dm³
Answer False
Explanation: Friction makes it stop at some point. For it to have an unlimited speed goes against beset is first law that states an object in motion with stay in motion unless acted upon by an external force, your force will be the friction of the wheels on the roller coaster
Answer:
0.056moles HF and 0.70M
Explanation:
When a strong acid is added to a buffer, the acid reacts with the conjugate base.
In the system, NaF and HF, weak acid is HF and conjugate base is NaF. The reaction of NaF with HCl (Strong acid) is:
NaF + HCl → HF + NaCl
Initial moles of NaF and HF in 60.0mL of solution are:
NaF:
0.0600L × (0.80mol / L)= 0.048 moles NaF
HF:
0.0600L × (0.80mol / L)= 0.048 moles HF
Then, the added moles of HCl are:
0.0200L × (0.40mol / L) = 0.008 moles HCl.
Thus, after the reaction, moles of HF produced are 0.008 moles + the initial 0.048moles of HF, moles of HF are:
<em>0.056moles HF</em>
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In 20.0mL + 60.0mL = 80.0mL = 0.0800L, molarity of HF is:
0.056mol HF / 0.0800L = <em>0.70M</em>
Answer: 6.022×1023
Explanation: Chemists generally use the mole as the unit for the number of atoms or molecules of a material. One mole is equal to 6.022×1023 molecular entities and each element has a different molar mass depending on the weight of 6.022×1023 of its atoms (1 mole)
Answer: Synthesis
0.84 moles of oxygen
25 moles of ![Fe_2O_3](https://tex.z-dn.net/?f=Fe_2O_3)
Explanation:
The balanced chemical equation is:
This is a synthesis reaction as one product is formed by combination of two reactants.
According to stoichiometry :
a. 2 moles of
require = 3 moles of
Thus 0.56 moles of
require=
of
b. 4 moles of
give = 2 moles of
Thus 50 moles of
give =
of