Answer: (1). There are 0.0165 moles of gaseous arsine (AsH3) occupy 0.372 L at STP.
(2). The density of gaseous arsine is 3.45 g/L.
Explanation:
1). At STP the pressure is 1 atm and temperature is 273.15 K. So, using the ideal gas equation number of moles are calculated as follows.
PV = nRT
where,
P = pressure
V = volume
n = number of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the values into above formula as follows.
2). As number of moles are also equal to mass of a substance divided by its molar mass.
So, number of moles of Arsine (molar mass = 77.95 g/mol) is as follows.
Density is the mass of substance divided by its volume. Hence, density of arsine is calculated as follows.
Thus, we can conclude that 0.0165 moles of gaseous arsine (AsH3) occupy 0.372 L at STP and the density of gaseous arsine is 3.45 g/L.
Molar mass of CaCl2 = 40+ ( 35.5 ×2)=110
Mr of Ca(OH)2 = 40+ (16+1)×2 =74
%of Ca = (40÷ 74)×10=...
1 m = 100cm...
1cm = (1÷100) m
So 45.5 cm = 45.5 ×(1÷100) =....
1km = 1000m
1m = 100 cm
1cm =10mm
So 1km = 1000×100×10 mm
Now convert
Answer:
Explanation:
Hello,
This types of reactions are likely to be carried out in gaseous phase as it is easier to induce reactions, therefore, for us to compute the change in the enthalpy of this reaction we should write the formation enthalpy of gaseous methanol, hydrogen chloride, methyl chloride and water as -205.1, -92.3, -83.68 and -241.8 kJ/mol respectively. Then, the reaction enthalpy for this reaction is:
Which accounts for an exothermic chemical reaction.
Regards.
Answer:
Explanation:
Hello there!
In this case, according to the given balanced chemical reaction by which ZnS reacts with O2, it is possible to calculate the moles of the latter that are consumed, not produced, according the 2:3 mole ratio between them and the following stoichiometric set up:
But also, we can compute the moles of SO2 that are produced via the the 2:2 mole ratio of ZnS to SO2:
Regards!
<h3>
Answer:</h3>
769.122 cm³
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Explanation:</h3>
What is volume?
Volume refers to the amount of space of that is occupied by an object.
What are units of measuring volume?
Volume is measured in cubic units. For example cubic meters, cubic centimeters, cubic inches, etc.
How is volume calculated?
Volume is calculated depending on the shape of a solid.
For example,
Volume of a cuboid is length × width × height
Volume of a sphere is 4/3πr³, etc.
In this case;
We are required to calculate the volume of a box whose dimensions are;
16.0 cm × 10.3 cm × 4.667 cm
But;
Volume = l × w × h
Therefore;
Volume of the box = 16.0 cm × 10.3 cm × 4.667 cm
= 769.122 cm³
Thus, the volume of the box is 769.122 cm³