How many molecules does 36.0 grams of water represent?

6g h2o x (1 mole h2o / 18.0 g h2o) x (6.022x10^23 molecules / mole) = 1.20x10^24 molecules h2o 

11 g co2 x (1 mole co2 / 44.0 g co2) x (6.022x10^23 molecules / mole) = 1.51x10^23 molecules co2 

3.0 g co2 x (1 mole c / 12.0 g c) x (6.022x10^23 molecules / mole) = 1.5x10^23 atoms c 

caco3 has formula mass = 100 g/mole 
200 g caco3 x (1 mole / 100g) x (6.022x10^23 molecules / mole) = 1.20x10^24 formula units 

 
molar mass h2o = 2x1.0 + 1x16.0 = 18.0 g/mole 
molar mass f2 = 2x 19.0 = 38.0 g/mole 
molar mass cai2 = 40.1+ 2x126.9 = 294 g/mole 
molar mass pb(no3)2 = 207.2 + 2x(14.0 + 3x16.0) = 331 g/mole 

 
80.0 g h2o x (1 mole / 18.0 g) = 4.44 moles h2o 
45.0 g c6h12o6 x ( 1 mole / 180 g) = 0.25 moles c6h12o6 
22.0 g co2 x (1 mole / 44.0 g) = 0.500 moles co2 
56.0 g n2 x (1 mole / 28.0 g) = 2.00 moles n2 

 
2.0 moles lioh x (24.0 g/mole) = 48 g lioh 
5.0 moles ba(cn)2 x (189.3 g/mole) = 950 g ba(cn)2 
3.5 moles h2o x (18.0 g/mole) = 63 g h2o 
0.75 moles cuso4 x (159.6 g / mole) = 120 g cuso4 

 
2.0 moles he x (6.022x10^23 atoms / mole) = 1.2x10^24 he atoms 

3.0 moles nacl x (6.022x10^23 units nacl / mole) x (1 na+ / 1 unit) = 1.8x10^24 na+ ions 

0.25 moles ch4 x (6.022x10^23 molecules / mole) = 1.5x10^23 molecules ch4 

there are 3 atoms / 1 molecule of h2o 
1 mole x (6.022x10^23 molecules h2o / mole h2o) x (3 atoms / 1 mole h2o) = 1.8x10^24 atoms 

 
6.02x10^23 molecules h2o x (1 mole / 6.022x10^23 molecules) = 1.00 mole h2o 

3.01x10^23 molecules c2h6 x (1 mole / 6.022x10^23 molecules) = 0.500 moles c2h6 

1.2x10^24 molecules glucose x (1 mole / 6.022x10^23 molecules) = 2.0 moles glucose 

2.41x10^24 units cacl2 x (1 mole / 6.022x10^23 units) = 4.00 moles cac2 

 
1.20x10^24 molecules x (1 mole / 6.022x10^23 molecules) x (18.0 g / mole) = 36.0 g h2o 

2.41x10^24 units x (1 mole / 6.022x10^23 molecules) x (171.3 g / mole) = 342 g ba(oh)2 

1.51x10^22 atoms x (1 mole / 6.022x10^23 atoms) x (20.18 g/mole) = 0.503 g ne 

7.53x10^22 molecules x (1 mole / 6.022x10^23 molecules) x (16.04 g/mole) = 2.00 g ch4

2positives of biotechnology: 1. plants have become more resistant to viruses and other communicable pests.2. with the of biotechnology, we have been able to produce better tasting fruits as well as vegetables.2 negatives of biotechnology: 1. biotechnology poses a number of environmental threats. genetically modifies crops often infect monarch butterflies and other insect species.2. viruses could combine with crops.

It would be (at) + cu (s)