chemistry

posted by .

How many grams of KCl are required to make .75 L of 0.29 M solution? Round to one decimal place.

i got .2907
is this correct
im not sure about the decimal places
thanks

  • chemistry -

    massingrams=molmassKCl*.75*.29

  • chemistry -

    Try to remember to include leading zeros as this are easily lost. So 0.75 rather than .75

    MM of KCl is 74.5513 g/mol

    so number of moles is

    74.5513 g/mol c 0.75 litre x 0.20 mol litre^-1

    =11.182 g

    which rounds to 11.2 g to 1 decimal place.

    You might find this site useful

    http://www.cimt.plymouth.ac.uk/projects/mepres/book7/bk7i2/bk7_2i2.htm

    for rounding.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    how do u mutiply decimals and how do u make a decimal into a fraction do you mean long-hand?
  2. math

    round result to two decimal places...the answer i have is: 7.023 so two decimal places would it be: 702.0 You're asked to round to two decimal places. 7.023 = 7.02. Your answer has only one decimal place. so i guess my answer is wrong …
  3. chemistry

    The price of a ream of paper is $3.30. There are 500 sheets of paper in a ream. If a sheet of paper weighs 0.500 oz, what is the price of a kg of paper (in dollars, do not include units, round to two decimal places)?
  4. Chemistry

    1. Calculate the pH of a buffer solution that contains 0.32 M benzoic acid (C6H5CO2H) and 0.17 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 10-5 for benzoic acid] Round your answer to two places past the decimal. 2. A solution is prepared …
  5. Chemistry

    1. Calculate the pH of a buffer solution that contains 0.32 M benzoic acid (C6H5CO2H) and 0.17 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 10-5 for benzoic acid] Round your answer to two places past the decimal. 2. A solution is prepared …
  6. college stats

    Sorry for all the questions, I really need help and an explanation so I can fully understand. I really appreciate everything. Thank you. In a random sample of 519 judges, it was found that 285 had an introvert personality type. Construct …
  7. Math Question

    This problem on my homework is asking me to write each fraction as a decimal, and round to three decimal places. The fraction was 17/16. I got 1.0625 for the decimal. What does it mean to round it to three decimal places, and how do …
  8. chemistry

    Sodium chloride is formed by the following reaction: NaOH + HCl --> NaCl + H2O How many grams of water are formed when 10 g of HCl is consumed?
  9. Biology Help Please!

    1) You are going to make 1800ml of a 25uM solution using a compound whose MW= 60.06 Daltons. How many grams do you need of this compound?
  10. Chemistry Help Please!

    1) You are going to make 1800ml of a 25uM solution using a compound whose MW= 60.06 Daltons. How many grams do you need of this compound?

More Similar Questions