Answer:
The first ionization energy is defined as
- Energy which is required to pull out one mole of the outermost shell's electrons in a neutral atom from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+.
- , where A is any neutral atom.
- In the periodic table, Its value decreases from top to bottom in groups and increases from left to right across a particular period.
- Helium has the largest first ionization energy.
- Francium has one of the lowest.
Answer:
V ∝ abc
Explanation:
This task is a joint variation task involving only direct proportionality:
Direct variation is one in which two variables are in direct proportionality to each other. This means that as one increases, the other variable also increases and vice - versa.
Joint variation is one in which one variable is dependent on two or more variables and varies directly as each of them.
In this exercise:
If a ∝ b and a ∝ c, then a ∝ bc
Taking the above three proportionalities,
V ∝ a ∝ b ∝ c
V ∝ a ∝ bc
V ∝ abc
Answer:
b, c, e
Explanation:
Inorganic compounds usually lack carbon.
Inorganic compounds are not associated with or made from living things.
Inorganic compounds include salt and water.
Number of moles of a substance can be calculated from mass of the substance and its molar mass as follows:
Here, n is number of moles, m is mass and M is molar mass.
For aspirin: 324 mg
Molecular formula is and molar mass of aspirin is 180.157 g/mol, thus, number of moles will be:
For sodium hydrogen carbonate: 1904 mg
Molecular formula is and molar mass is 84.007 g/mol, thus, number of moles will be:
For citric acid: 1000 mg
Molecular formula is and molar mass is 192.124 g/mol, thus, number of moles will be:
Therefore, number of moles of aspirin, and citric acid in the tablet is 0.0018 mol, 0.0226 mol and 0.0052 mol respectively.
Answer:
Pareto diagram or bar graph
Explanation: