Full Adaptive Learning Objectives Mastery POWERED BY KNEWTON 1 2 3 2 Learning Objective: 8.C Quantify mass and number of moles in solutions given their concentrations. Adaptive Assignment O See page 336 Question 1st attempt Jl See Periodic Table O See Hint A concentrated solution of HF has a molarity of 9.75 M. You add 31.00 mL to a flask and then dilute with water. The mass of the final solution is 125.0g. What is the mass percent of HF? < 12 > A SUBMIT ANSWER MacBook Air 1421 888 F4 FS F6 F7 FO 19 $10 F3

Full Adaptive Learning Objectives Mastery POWERED BY KNEWTON 1 2 3 2 Learning Objective: 8.C Quantify mass and number of moles in solutions given their concentrations. Adaptive Assignment O See page 336 Question 1st attempt Jl See Periodic Table O See Hint A concentrated solution of HF has a molarity of 9.75 M. You add 31.00 mL to a flask and then dilute with water. The mass of the final solution is 125.0g. What is the mass percent of HF? < 12 > A SUBMIT ANSWER MacBook Air 1421 888 F4 FS F6 F7 FO 19 $10 F3

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter8: Chemical Composition

Section: Chapter Questions

Problem 9ALQ: onsider separate 100.0-g samples of each of the following: NH3 , N2O , N2H4 , HCN , HNO3 . Arrange...

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onsider separate 100.0-g samples of each of the following: NH3 , N2O , N2H4 , HCN , HNO3 . Arrange these samples from largest mass of nitrogen to smallest mass of nitrogen and prove/ explain your order.
for part a) can someone show how we get from 35265405 moles to 564.24tonne/year
How many micrograms of KMnO4 (Formula Weight: 158.04 g/mole) are contained in50mL of 125mM KMnO4 (answer must be presented in scientific notation format)?
Preparation of 5% (mass/vol) NaCl Solution (Answer must be in the format of the 2nd picture, please provide the answer for number 2 as well)
Dapsone tablets, labelled 50 mg has an average tablet weight of 0.6509 g. 2.0g of powdered tablets reacted (see reaction below) with 26.05 mL of 0.0506N sodium nitrite (NaNO2) solution. Determine the amount of Dapsone as a percentage of the Label Strength (or Label Claim). Report your answer to 1 decimal place. Given: Dapsone molar mass, 248.302 g/mol Dapsone structure Reaction: Sodium nitrite (NaNO2) reacts with hydrochloric acid (HCl) to generate nitrous acid (HNO2). NaNO2 + HCl ® HNO2 + NaCl Nitrous acid (HNO2) then reacts with each amino group on Dapsone, and an indicator indicates the endpoint. R-NH2 (full structure shown above) + HNO2 + HCl ® R-N2Cl + 2H2O
Write the empirical formula for the hydrated KAl(SO4)2, based on moles of anhydrous KSI(SO4)2= 0.046 mol molar mass of H2O= 18g/ mol moles of H2O= 0.0444mol ratio pf moles H20 to moles of anhydrous KAI(SO4)2= 9.65/1 . Show all work including units. Hint: if the ratio of moles of H2O to moles of anhydrous KAl(SO4)2 was 4, then the empirical formula would be: KAl(SO4)2•4H2O.
The following problem is patterned after Examples 6-7. The information is based on the spreadsheet shown below. Suppose Ingredient I is made up of 60% micoden and 40% water, Ingredient II is made up of 40% micoden, 40% bixon, and 20% water, and these ingredients are mixed together. What is the percentage of bixon in mixture a? Please type answer note write by hend
How many g of Na2SO3 are in 350 mL of 1.10 M solution? ___ g (provide answer with the correct sig figs in the form of units of moles without scientific notation)
Mole Ratio Worksheet All the following chemical reactions are balanced, please write your mole ratios like this 1:2, and ½ both ways. This is important in the future. Here’s a video in case you need help, or missed the lecture notes, lecture, and practice problems. https://www.youtube.com/watch?v=c9beXPzJ-Fs Step 1) RTFQ- read the funny question, circle the known (what I know), and what you need (what I want to know). Step 2) Set up DA, your KNOWN in the top left box, then cancel the units till you get the unit you want. Step 3) Do the math= calculate __Zn + 2HCl __ZnCl2 + __H2 balanced equation.a. How many moles of hydrogen are produced from the reaction of three moles of zinc? 1.Mole to mole prob, therefore set up mole ratio 2.Set up DA______________= 3.math How many moles zinc are needed to produce 3.5 moles of zinc chloride? Mole to mole prob, therefore set up mole ratio 1.Mole to mole prob, therefore set up mole ratio 2.Set up DA______________= 3.math How…
please answer this question correctly. dont just give an answer, please include brackets, mutiplucation ( if neccessary), etc. 1. Find the number of moles in 3.7 x 10 ^-5 g of magnesium phosphate. hello i've got an answer, but would like for it to be on paper. this picture is an similar example of how i want this problem to be solved.
A local water retention pond was found to have elevated levels of mercury concentrated as 14 ng per liter. You would like to collect some mercury for your homemade perpetuum mobile machine. How many moles of mercury can you get you collect and process the entire volume of 1250 m3 of the water in the pond?
only need help with "e" 1. Use the following data table and steps a-d below to calculate the concentration of the zinc carbonate. The mass of the filter paper alone (no ZnCO3) was 1.3457 g. The Zn(NO3)2 solution (10.00 mL) was mixed with 15.00 mL of the 1.00 M Na2CO3. a. Calculate the mass of zinc carbonate formed. 0.8939 b. How many moles of zinc carbonate formed? 0.00715 c. Calculate the moles of zinc in the zinc nitrate solution used. 0.00175 d. Calculate the concentration of the zinc in the zinc nitrate solution. 0.715 M e. Confirm whether sodium carbonate was in excess. Using the concentration of the sodium carbonate solution used, determine how many moles were used and confirm it was the excess reagent