What mass of water has 6.70 x10^23 molecules? I keep getting 2.005e47 On my calculator but the answer key says 20 g . 6.70x10^23 molecuels *1 mol/6.02x10^23*18.02 g H2O /1 mol That's how I set it up.
June 21, 2015
From the fringe pattern of an empty Ir cell, the following wavenumbers were found for a seies of consecutive fringes: 3011.11 cm, 3058.12 cm, 3108.89 cm, and 3157.75cm, 3205.64cm, 3254.54 cm, 3303.26 cm. With a suitable graphical plot, calculate and express the answer to the ...
May 8, 2015
Elin estimates her probability of passing French 0.6, passing chemistry is 0.8, (a)determine the probability that elin will pass French but fail chemistry (b) pass chemistry but fail French (c) pass both classes (d)fail both classes
April 15, 2015
There are 20 bikes in spinning class, the bikes are arranged 4 rows, with 5 bikes in each row. They hope to be in the same row, but cannot request specific bike. Determine the probability that all 5 friends will be in same row with Jeff and dariya at either end.
March 26, 2015
Mark plays basketball and he scored 6 times in 8 shots. He says odds in favour of him scoring are 3:4 is he right? Explain. I said he is wrong because 6/8=3/4 which is the probability and the odds in favour for him scoring are 3:1. Am I right?
March 24, 2015
Sodium nitrate reacts with copper (II) hydroxide. I know how to write it down: NaNo3+CuOH2----> NO REACTION The problem is that I don't understand why it's no reaction I know it's double replacement and we have to look at activity series of metal to figure out ...
February 26, 2015
Ok, so the problem was about a person with 300 feet of fence to make a rectangle enclose. The person also wanted to use the fence to split the enclose to two parts with the fence paralel to two of the sides. Find the dimensions So I am confuse on how to solve this.
October 18, 2011
Im working on prepostional phrases and need help with these problems: What is the prep. or prep. phrase and indicate whether it is an adj. or an adv? 1. An aid car raced through 3 red lights. 2. Latecomers may enter the theater only between acts.
February 28, 2010
1.what was the Pickney treaty? 2.why did president jefferson want to buy new orleans from france? 3.why was napoleon willing to sell the entire louisiana purchase?(2reasons) 4.how much did the U.Spay for the Louisiana territory? 5.how much larger did the U.s get from this ...
November 9, 2009