A solution of salt and water contains 70 grams of water per 140 milliliters of the solution. If 1 mole of water weighs 16 grams, _____ moles of water would be present in 35 milliliters of the solution. [Round off your answer to two decimal places]

Question

anonymous · Answer

given:
70g/140ml
1mol/16g
35ml
need to find: moles
35ml*70g/140ml*1mol/16g

anonymous · Answer

wait so i have to divide the last part

anonymous · Answer

start with 35 ml. first multiply by 70g/140ml to convert to grams, then multiply by 1mol/16g to convert to moles

anonymous · Answer

is the answer 9,816

anonymous · Answer

what do i do after i multiplied them

anonymous · Answer

http://www.wolframalpha.com/input/?i=35ml*70g/140ml*1mol/16g

anonymous · Answer

the answer is 1.094 mol

anonymous · Answer

*1.09 moles [Round off your answer to two decimal places]

anonymous · Answer

oh your right wow thank you very much but can you help me with 1 more please

anonymous · Answer

sure; what's the question

anonymous · Answer

Alex needs to make $120 for a trip. He plans on selling 17 bags of snacks to raise money. The lowest acceptable price for him to sell these to make his goal is $______.

anonymous · Answer

total money = price per bag * number of bags
120 = x * 17

anonymous · Answer

solve for x

anonymous · Answer

i think is 7.0588235294

anonymous · Answer

looks good :)

anonymous · Answer

i think it is

anonymous · Answer

but i think is 7.06