the average mass of all of that type of atom compared to 1/12 mass of C12
100
are really into stoichiometry and want to know...... how much water there would be if they have 1000 moles (in decimeters)
1000 moles = 1000 x 18g =18000 g density = 1g/ml
18000 ml = 18 dm3
200
If i had a mole of marshmallows and covered the whole of the US, how deep would the marshmallows be?
600 miles
200
What is the RMM of glucose
c6 H12 o 6 72+12+96 = 180
200
A student eats 500 french fries a day. How long would it take her, heart failure and other poor diet problems permitting, to eat 0.1 moles of french fries
3.02 x 10^21 days
200
how do we 'weigh' atoms
mass spectrometer
200
want to know the shape of a p orbital
yes like i have that on my keyboard
300
If I have one mole of Carbon 14 how many protons do I have ?
6 x 6.022 x 10^23 = 3.6 x 10^24
300
Why is the RAM or RMM not a whole number
Average of all of the isotopes
300
copper atoms would it take to measure 1 cm
each atom measures..........x
1 cm / x =
300
What is an isotope?
same number of protons/ atomic number diff mass/number of protons
300
want to know 2 elements that have the same atomic mass
..........
400
Which will contain the most particles..... one mole of Hydrogen gas or one mole of hydrogen atoms
both the same
400
100g of water = how many moles
100/18 = 5.56
400
moles of seconds will you live for if you live to 100 yrs old, ignoring leap years and leap seconds and presidential decrees to move time back or forwards
365 x 100 x 24 x 60 x 60 = / 6.02 x 10^23 = 3.6 x 10^-9
400
What is a half life?
Time taken for a radiaoctive substance to lose half its mass/radiactivity
400
how the visible line spectrum of hydrogen is created
excited electron returning to n=2, emitting light energy
500
5 moles of water is how many water molecules
5 x 6.022 x 10^23 = 3.0x10^24
500
I fill my swimming pool with alcohol (the playboy lifestyle us STT teachers are know for) C2H5OH.
Alcohol has a density of 789 Kg/m^3.
My pool is 100m by 10m by 5m.
How many moles of alcohol is this ?
85 761
500
A 10g bar of gold costs 454$, how much is that per mole
10/197 = 0.05 moles, so one mole would be 454 x 20 = 9080$
500
How does C dating work.......
....... and why is it not advertised on TV like christian mingle or farmers dating?
500
the stages in the operation of a mass spectrometer
atomisation, ionisation, acceleration, deflection and detection