Chemistry

Chemistry, 02.10.2019 02:00, dbanks701

How many atoms of oxygen are in 2.50 moles of co2? is it 1.93 x10^23?

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Mathematics, 01.07.2019 02:30, titalili0204

The ratio of hydrogen to oxygen atoms in water molecules is 2 to 1. if the beaker of water contained 4.1 moles of oxygen atoms, how many moles of hydrogen atoms did it contain? (note: a mole is a unit commonly used in chemistry. you don't need to know this to solve the problem, but in case you are interested, 1 mole=6.02 times 10^23 atoms) plz !

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Chemistry, 03.07.2019 14:50, taylorruiz16

Mole-atom conversions 1. how many moles are 1.55 x 1027 atoms of zinc (zn)? 2. how many atoms are in 25.0 moles of calcium (ca)? 3. how many atoms are in 0.35 moles of carbon (c)? 4. how many moles are 7.6 x 1024 atoms of helium? mole-mass conversions how many moles in 28.o grams of oxygen? what is the mass of 5.0 moles of iron? find the number of moles of argon in 452 g of argon. find the grams in 16.5 mol of hydrogen.

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Chemistry, 17.09.2019 02:50, gwoodbyrne

Pentane, c5h12, will react as shown below: (l) ++ h2o h20(g) 1. balance the equation above by putting coefficients into each blank space. 1c5h12+ 5co2+ 6 h2o (this is what i got) 2. how many atoms of oxygen are in 144 grams of pentane? step 1: 144g of c5h12*(1mole/72.17)= 1.995moles of c5h12 step 2: 1.995moles of c5h12*(8moles of o2/1mole of c5h12)= 15.962 moles of o2 step 3: 15.962 moles of o2*(6.02*10^23 atoms of o2/1mole of o2)= 9.609*10^24 atoms of o2 (i don't know if i did this right) 3. how many atoms of oxygen are in 192 grams of carbon dioxide gas? step 1: 192 grams of co2 *(1mole of co2/44.01grams of co2)= 4.363 moles of co2 step two: 4.36moles of co2* ( 1 mole of o2/1mole of co2)= step 3: 4.363* (6.02*10^23) = 2.627*10^24 atoms of o2 (i don't know if this is correct. 4. a) circle one: true or false: reactant you begin with fewer grams of is your limiting reactant. b) if 32 g of oxygen gas and 32 g of pentane are combined, how much water will be produced, in moles? (use your reaction from the top of the first page) need asap !

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Chemistry, 28.09.2019 09:30, jeanbeansmith2p2ofty

Me in the balanced equation in the question above, how many moles of oxygen atoms react? a) 1 point b) 1 mole c) 2 moles d) 3 moles 4 moles cannot be determined

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