Answer:
.15 grams of MgO / 40.3 = .0285 moles of MgO. For every mole of Magnesium Oxide, you have one mole of magnesium and one mole of oxygen, therefore,.0285 moles of MgO * (1 mole of magnesium/1 mole of magnesium oxide) = .0285 magnesium.0285 magnesium * (6.022 *10^23 atoms magnesium/1 mole of magnesium) = 1.718*10^22 atoms of magnesium
Explanation:
Answer: Option (a) is the correct answer.
Explanation:
The given data is as follows.
= 4.19
= 1.9
Heat of vaporization () at 1 atm and is 2259 kJ/kg
= 0
Therefore, calculate the enthalpy of water vapor at 1 atm and as follows.
= +
= 0 + 2259 kJ/kg
= 2259 kJ/kg
As the desired temperature is given and effect of pressure is not considered. Hence, enthalpy of liquid water at 10 bar and is calculated as follows.
=
= 334.781 kJ/kg
Hence, enthalpy of water vapor at 10 bar and is calculated as follows.
=
= 2410.81 kJ/kg
Therefore, calculate the latent heat of vaporization at 10 bar and as follows.
=
= 2410.81 kJ/kg - 334.781 kJ/kg
= 2076.029 kJ/kg
or, = 2076 kJ/kg
Thus, we can conclude that at 10 bar and latent heat of vaporization is 2076 kJ/kg.
Classify each material as an alloy or ceramic
alloy- Bronze,brass, steel and glass
Ceramic- brick and tile
<u><em> Explanation</em></u>
<u><em>Alloy</em></u> is a metal made up by combining two or more metallic elements.
for example, bronze is made up by alloying tin with copper.
<u><em>Ceramic </em></u>materials is an inorganic,non metallic which is often crystalline oxide,nitride or carbide material.
For example, Tiles are made up of natural clay sand and water.
During convection, hot material then moves to the side and create a void which must be filled with new less hot material, this creates a circular pattern. <span>This circular patter is called convection current. That is the description of the mechanism of transfer of matter and heat by convection. That is how the heat transfer in fluids (liquid and gases) and is also the force behind the motion of plates (continents) as per geologists.</span>