Chemistry, 05.10.2019 19:30, absoul1143

Calculate the mass if 1.00 x 10^24 (a septillion molecules of water. ! ? can some one me with this i just don't understand it ..

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Chemistry, 05.08.2019 01:00, 8hoofs

Why is ice less dense than water? a. the water molecules in ice have less mass than in liquid water b. the water molecules are more closely packed together in ice than in water. c. the water molecules form crystalline lattice structures in ice where they are more spread out d. the water molecules in ice have less volume than in liquid ice.

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Chemistry, 23.08.2019 18:30, weridness80

Ireally need with this chemestry project. i do not understand anything of this. can you guys plz me? problem: you and your team work at southern nevada water authority and have been given the job of managing fluoride levels for the municipal water system. today, you will need to measure the mass of the mineral sample fluorite (chemically, caf2). use this sample to determine how much water must be added to yield a 1 ppm fluoride solution. your supervisor is requesting tanker trucks to bring the excess water. he needs to know how many tanker trucks to request and the total cost. notes: 1 mol caf2 = 78.08 g caf2 = 6.02 x 1023 molecules of caf2 1 molecules of caf2 = 2 atoms of f 1 mol h2o = 18 g h2o density of water is 1 g/ml 1000 ml = 1 l and 3.78 l = 1 gallon mass of sample of caf2 = 287.185 g 1 part per million = 1 atom of fluorine per 999,999 water molecules. 1 truck can carry 12,800 litters of water at a cost of $2,852.42 dollars. before you begin mixing a solution of fluorite and water your team must first calculate the amount of water you will need. your team will create a presentation that will show all of the necessary calculations to ensure that the greater las vegas area will have cavity free teeth. the presentation should include the following information: - draw a diagram that points out the basic design of the water system and transport. - demonstrate the following calculations (a) calculate how many moles of mineral fluorite (caf2) are in you sample. (b) calculate the number of fluorine atoms in the sample of the mineral fluorite (caf2). (b) calculate how many molecules of water you will need. (c) calculate the number of gallons of water that are needed to dissolve a 287.185 gram sample of fluorite to yield 1ppm solution. (e) how many trucks will be needed? show your calculations! (f) what is will be the total cost? - bonus points for creativity or “wow” factor (i.e. pictures, color, neatness)!

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Chemistry, 13.10.2019 23:00, alayciaruffin076

Calculate the mass of 1.00×1024 (a septillion) molecules of water.

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