1. How many molecules of fertilizer are there in 55,000 g of fertilizer?
2. How many molecules of ammonia Are there in 987 g of ammonia?
3. How many molecules of gasoline are in 719 g of gasoline
4. How many grams of copper are in 7.97 x 10 26th power atoms of copper II hydroxide?
Are these serious?
a. What's the molar mass of fertilizer? mols = grams/molar mass.
b. mols MH3 = grams NH3/molar mass NH3. Then remember there are 6.02E23 molecules in 1 mole.
c. What's the molar mass of gasoline? mols = grams/molar mass
d. 1 mol Cu contains 6.02E23 molecules; therefore, mols Cu = 7.97E26/6.02E23 = ?
Then g = mols x atomci mass.
My teacher didn't teach me how to do the problems i asked befor but he show me how to do a problem w/ an actual element ... The one problem he taught me was ...
How many atoms of iron are there in 735g of iron?
We rounded fe to the whole number 56
Grams to mole to atoms= map of wht to solve
I use a grapghing calculator
So 735g Fe ( 1 mole Fe/ 56g Fe)= 13.125 then round it to 2nd decimal place and we get 13.13 mole Fe
So now 13.13 mole Fe( 6.02 x 10 23power atoms Fe/ 1 mole Fe) ... We cross out moles and have to multiply 13.13x 6.02 button2nd button ee 23 = 7.904 e 24 = rounded to 2nd decimal place = answer 7.90 x 10 24th power atoms Fe
I need help w/ the questions above cause i know how many grams are in iron but i don't know wht fertilizer, ammoniat etc... in grams would be
As far as I know no one knows the molar mass of fertilizer or gasoline.
You can do 2 by following my instructions. I think #4 has a typo, either in the original problem in in the post. There are molecules of copper II hydroxide but not atoms of copper II hydroxide. Assuming molecules was meant there, the problem is worked as I posted.
To find the number of molecules in a given mass of a substance, you need to follow these steps:
Step 1: Determine the molar mass of the substance. This represents the mass of one mole of molecules or atoms of that substance.
Step 2: Use the molar mass to convert the given mass to moles by dividing the given mass by the molar mass.
Step 3: Utilize Avogadro's number, which tells us the number of particles (molecules, atoms) in one mole of a substance. Avogadro's number is approximately 6.022 x 10^23 particles per mole.
Step 4: Multiply the number of moles by Avogadro's number to find the number of molecules or atoms present.
Now, let's apply these steps to each of the questions:
1. To find the number of molecules of fertilizer in 55,000 g:
Step 1: Determine the molar mass of fertilizer (if not given).
Step 2: Convert the given mass (55,000 g) to moles.
Step 3: Multiply the number of moles by Avogadro's number to find the number of molecules.
2. To find the number of molecules of ammonia in 987 g:
Step 1: Determine the molar mass of ammonia (if not given).
Step 2: Convert the given mass (987 g) to moles.
Step 3: Multiply the number of moles by Avogadro's number to find the number of molecules.
3. To find the number of molecules of gasoline in 719 g:
Step 1: Determine the molar mass of gasoline (if not given).
Step 2: Convert the given mass (719 g) to moles.
Step 3: Multiply the number of moles by Avogadro's number to find the number of molecules.
4. To find the number of grams of copper in 7.97 x 10^26 atoms of copper II hydroxide:
Step 1: Determine the molar mass of copper II hydroxide (if not given).
Step 2: Convert the given number of atoms to moles.
Step 3: Multiply the number of moles by the molar mass to find the mass in grams.
Remember to use a periodic table to obtain atomic masses for elements and the given chemical formulas for compounds.