Answer:
Q = 1760 cal or 7356.8 J
Explanation:
The general expression to use to calculate heat is the following:
Q = m*Cp*ΔT (1)
Where:
Q = heat in cal or joules
m = mass of the compound.
Cp = specific heat of the compound
T: change in temperature (K) or T2 - T1
Now, the reported Cp for water is 1 cal/g °C and 4.18 J / g °C, we will use both to calculate the heat in calories and joules:
Using calories we have:
Q = 32 * 1 * (80 - 25)
Q = 1760 cal
This is the heat in calories.
Using joules we have:
Q = 32 * 4.18 * (80 - 25)
Q = 7356.8 J
This is the heat expressed in Joules.
In order to calculate for the mole fraction of benzene, you will need to convert all mass into moles. This can be done through dividing the mass with the elements’ molar mass. Since the molar mass of HCl is 36, the number of moles of HCl in the solution is 2 moles. Meanwhile Benzene has a molar mass of 78 thus having 6 moles in the solution. Dividing 6 moles with the total number of moles which is 8 moles, you would get 0.75 mole fraction of Benzene.
Answer:
a) Let's balance the chemical equation for the reaction between HCl and HNO3 to form NOCl, Cl2, and H2O:
First, write the unbalanced equation:
HCl + HNO3 → NOCl + Cl2 + H2O
Now, balance it step by step:
1. Balance the atoms other than hydrogen and oxygen:
HCl + HNO3 → NOCl + Cl2 + H2O
1 1 1
2. Balance the oxygen atoms by adding water (H2O):
HCl + HNO3 → NOCl + Cl2 + H2O
1 1 1 +1
3. Balance the hydrogen atoms by adding HCl on the left side:
HCl + HNO3 → NOCl + Cl2 + H2O
1 1 +1 1 +1
4. Balance the chlorine atoms by adding Cl2 on the left side:
HCl + HNO3 → NOCl + Cl2 + H2O
1 1 +1 1 +1
Now, the equation is balanced.
b) Let's balance the chemical equation for the reaction between CO and I2O5 to form CO2 and I2:
First, write the unbalanced equation:
CO + I2O5 → CO2 + I2
Now, balance it step by step:
1. Balance the atoms other than carbon and oxygen:
CO + I2O5 → CO2 + I2
1 1
2. Balance the oxygen atoms by adding CO2 on the left side:
CO + I2O5 → CO2 + I2
1 1 +2
3. Balance the carbon atoms by adding CO on the left side:
CO + I2O5 → CO2 + I2
1 +1 +2
4. Balance the iodine atoms by adding I2 on the left side:
CO + I2O5 → CO2 + I2
1 +1 +2 +5
Now, the equation is balanced.
Do you switch charges for ionic or covalent bonds when naming them?
Answer:
ionic
Explanation:
when the substances are chemically reacted the physical properties remain the same
each substance has a unique set of physical properties
no two substances have any of the same properties
The following statements apply:
1. At any given location, the physical properties of a substance do not change.
2. Each substance has a unique set of physical properties.
Each substance usually has some characteristics that are peculiar to it and these characteristics can be used to identify them and separate them from other materials. Change of location does not affect the properties of substances, thus, the properties of oxygen that is found in America is the same as the one that is found in Nigeria.