Answer: 122 moles
Procedure:
1) Convert all the units to the same unit
2) mass of a penny = 2.50 g
3) mass of the Moon = 7.35 * 10^22 kg (I had to arrage your numbers because it was wrong).
=> 7.35 * 10^22 kg * 1000 g / kg = 7.35 * 10^ 25 g.
4) find how many times the mass of a penny is contained in the mass of the Moon.
You have to divide the mass of the Moon by the mass of a penny
7.35 * 10^ 25 g / 2.50 g = 2.94 * 10^25 pennies
That means that 2.94 * 10^ 25 pennies have the mass of the Moon, which you can check by mulitiplying the mass of one penny times the number ob pennies: 2.50 g * 2.94 * 10^25 = 7.35 * 10^25.
5) Convert the number of pennies into mole unit. That is using Avogadros's number: 6.022 * 10^ 23
7.35 * 10^ 25 penny * 1 mol / (6.022 * 10^ 23 penny) = 1.22* 10^ 2 mole = 122 mol.
Answer: 122 mol
see bahubali picture and pushpa this is your answer Visit your school library, read newspapers and discuss with your elders in your family to get information related to various activities, campaigns and news items about animal welfare. You can also do web search using keywords like endangered animals, animal rights, animal welfare, etc. Write a note of about 300-400 words describing the facts on the animal. Draw/paste picture as suitable. Note the following points: 1. animal in concern 2. year of origin of the project/activities/campaign, etc. 3. information regarding the animal 4. human-animal relationship
Answer:
The answer is
<h2>190.32 g</h2>
Explanation:
The mass of a substance when given the density and volume can be found by using the formula
<h3>mass = Density × volume</h3>
From the question
volume of ethanol = 146.4 mL
Density = 1.3 g/mL
The mass is
mass = 1.3 × 146.4
We have the final answer as
<h3>190.32 g</h3>
Hope this helps you
A substance where almost all have the same atomic number of protons