Answer:
1. 3.83 L
2. 0.368 mole
Explanation:
1. Determination of the volume
Pressure (P) = 3.21 atm
Temperature (T) = 202 K
Number of mole (n) = 0.741 mole
Gas constant (R) = 0.0821 L.atm/molK
Volume (V) =?
The volume can be obtained by using the ideal gas equation as illustrated below:
PV = nRT
3.21 × V = 0.741 × 0.0821 × 202
3.21 × V = 12.3497283
Divide both side by 3.21
V = 12.2888922 / 3.21
V = 3.83 L
Thus, the volume of the gas is 3.83 L
2. Determination of the number of mole.
Pressure (P) = 2.50 atm
Temperature (T) = 215 K
Volume (V) = 2.60 L
Gas constant (R) = 0.0821 L.atm/molK
Number of mole (n) =?
The number of mole can be obtained by using the ideal gas equation as illustrated below:
PV = nRT
2.50 × 2.60 = n × 0.0821 × 215
6.5 = n × 17.6515
Divide both side by 17.6515
n = 6.5 / 17.6515
n = 0.368 mole
Thus, the number of mole of the gas is 0.368 mole.
Hence they got seven electrons in ground state
The best answer here is B , i.e. the components of a homogenous mixture are evenly distributed
This means the constituents are mixed uniformly.
In a heterogeneous mixture, the constituents are not mixed uniformly.
Some good examples of a homogeneous mixture are:
1. Sugar solution
2. Soda
3. Water
5. soft drinks
6. Air
7. Vinegar
8. Brine
Some examples of a heterogeneous mixture are:
1. Blood
2. Milk
3.Water and oil
4. Water and sand
5. Soil
6. Hollandaise sauce
8. smog
Answer:
22.22 g
Explanation:
The balanced reaction equation is;
Ca(s) + 2HCl(aq) → CaCl2(aq) + H2(g)
Number of moles of calcium reacted = 8.02g/40.1g/mol = 0.2 moles of Calcium
From the reaction equation;
1 mole of Ca yields 1 mole of CaCl2
Hence 0.2 moles of Ca also yields 0.2 moles of CaCl2
Mass of calcium chloride produced = number of moles * molar mass
Mass of calcium chloride = 0.2 moles of CaCl2 * 111.1g/mol = 22.22 g
