Home Work 8

what is the mass of baker? What is the mass of sodium acetate?

I need help from questions A-C

4. Brass is an alloy of copper and zinc. Varying the mass percentages of the two metals produces brasses with different properties. A brass called yellow zinc has high ductility and strength and is 34-37% zinc by mass. Find the mass range (in g) of copper in 135 g of yellow zinc. 1. 85.1g - 89.1g 2. 117g - 122g 3. 45.9g - 50.0g 4. 62.9g - 68.5g

4. A student conducted an experiment by heating BaCl₂ 2H₂O and reported the percent of water as 15.25%. Calculate the percent error (Hint: Use the calculated theoretical value).

The following prompt will be used to answer the first six questions. An experiment was performed to separate the components of a binary mixture composed of sucrose (sugar) and sand. The following data was collected in lab during the experiment. Mass of original binary mixture: 20.100 ± 0.001 g Mass of initial filter paper: 21.206 ± 0.001 g Mass of filter paper and isolated sand: 25.226 ± 0.001 g q1 Given the data and information in the prompt, what percent of sand is in the original mixture with absolute error? You will submit your answer in three parts. For this question, what value do you get for the percent of sand? You only need to submit the value here since the sig figs and error will be entered in the next two questions. You do not need to include the % symbol with your answer.

The following prompt will be used to answer the first six questions. An experiment was performed to separate the components of a binary mixture composed of sucrose (sugar) and sand. The following data was collected in lab during the experiment. Mass of original binary mixture: 20.100 ± 0.001 g Mass of initial filter paper: 21.206 ± 0.001 g Mass of filter paper and isolated sand: 25.226 ± 0.001 g q2 Given the data and information in the prompt, how many sig figs is the percent of sand in the mixture reported with? Your answer should just be an integer value, such as "1."

A student working on this lab found the mass of their sample after the first heating to be 30.6057 g. The student heated the sample again for 5 minutes, cooled it, and then found the mass of the sample to be 30.5757 g. Is the sample at constant mass? Show the calculation you used to answer this question.

True or false: When forming conclusions from an experiment, the researcher should compare the results to the initial hypothesis. * True False True or false: Atomic theory doesn't need to be taken seriously because "it's just a theory" False O True mixture has 24 grams of salt and 36 grams of sugar. What is the percentage of

Question 16 Which one of the following is a physical change? A. CH4(g) + 2O2(g) → 2H₂O(g) + CO2(g) C. H₂O(s)→ H₂O(1) B. Combustion of hydrogen Decomposition of NaN3 D. OA OBOC OD Which pair of elements would you expect to show the greatest similarity in their physical and chemical properties? A. O, S C. K, Ca B. C, N D. H, He OA OBOCOD Question 17

A sample of a compound has a mass of 41.13 g. The sample is found to contain 37.28 g of carbon and 3.85 g of hydrogen. What is the percentage composition of the compound? A 90 69% carbon and 4 7% hydrogen

You collect a sample of seawater containing salt. The original sample weighs 15.67 g. You dry the sample until there is no remaining water. You weigh it again. 0.78 g of salt remains. What was the percent of salt in the sample? Round to the nearest percent.

O Chemical Reactions Calculating molarity using solute mass D0/5 Bi- A chemist prepares a solution of sodium chloride (NaCl) by measuring out 120. g of sodium chloride into a 500. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's sodium chloride solution. Round your answer to 3 significant digits. mol/L X

Please answer question number 1 correctly with the correct answer. there is a picture of an example of a ''Dimensional analysis Format' below. please write out all work showing the math in dimensional analysis format.    Question 3: Calculate the molar mass of each of the following ionic Compounds:   A. KMnO4 B. Ca3(PO4)2

5.) Correctly match the terms listed on the left with the substances listed on the right. More than one term may be used for each substance. A. element B. compound C. heterogeneous Mg Fe mixed with sand saltwater D. mixture water E. homogeneous F. pure substance G. Solution M9SO. 41 8 3. 5 CO

Do

TNT EM L O I118% D 7:56 Common Laboratory Apparatus Questions Question 1/1 Is a beaker a common laboratory apparatus? Choose an answer Hint Yes No Answer

Determine the mass of the product from the following data.    Mass Aluminum Foil (g)      2.5415 Mass Filter Paper (g)      0.2777 Mass Filter Paper + Product (g)      35.6484 Mass Product (g)       Group of answer choices 35.3708 g  35.3705 g  35.3707 g  35.3709 g  35.3706 g

I don’t know where to start. I thought about doing 100-44.98 but that wouldn’t tell me as much.

A student is measuring a sample of sodium bicarbonate on an electronic balance that measures to the thousandth of a gram. The balance displays 23.050 g for the mass of the sample. Which choices will be an appropriate way to record this mass on a laboratory report? 23.050 g 23.0500 g 23.05 g 23 g 23.1 g

The following prompt will be used to answer the first six questions. An experiment was performed to separate the components of a binary mixture composed of sucrose (sugar) and sand. The following data was collected in lab during the experiment. Mass of original binary mixture: 20.100 ± 0.001 g Mass of initial filter paper: 21.206 ± 0.001 g Mass of filter paper and isolated sand: 25.226 ± 0.001 g q5 Given the data and information in the prompt, how many sig figs is the percent of sugar in the mixture reported with? Your answer should just be an integer value, such as "1."

A 480-pound alloy (which is just a mixture of metals ) containing 30% silver was mixed with an alloy containing 55% silver to get an alloy containing 40% silver. How many pounds of the 55% alloy were used?

Please do both.

You are to give ampicillin 25 mg/kg to a child with a mass of 66 lb. If stock on hand is 250 mg/capsule, how many capsules should be given? Use appropriate sig figs for your final answer. Your Answer: Answer units 18 Group 1A Group 8A 2. 13 14 15 16 Group Group Group Group Group He SA 17 2 1. н Group 2A 3A 4A 6A 7A 1.008 4.003 10 6. 6. 2. Li Be C Ne Transition elements 6.941 11 9.012 10.81 13 12.01 14 Si 19.00 17 CI 20.18 18 Ar 14.01 12 16.00 16 3. 4. 5. 15 Na Mg 6. 6B 10 9. 8B- 11 1B 12 2B 3 Al 3B 4B 5B 7B 22.99 19 K 24.31 20 Ca Sc 26.98 31 Cu Zn Ga Ge As 28.00 32 30.97 33 32.07 34 Se 35.45 39.95 21 22 Ti 23 24 25 26 27 28 29 30 35 36 4. Cr Mn Fe Co Ni Br Kr 39.10 40 06 52.00 42 4496 4747 40 50 94 41 54.94 43 Tc 55.85 44 58.93 45 Rh 58.49 46 63.55 47 65.41 48 72.64 50 79.90 53 69.72 49 78.96 52 Te 83.80 54 Xe Rb Sr Zr Nb Mo Ru Pd Ag Cd In Sn Sb 85.47 55 Cs 9122 72 Hf 9291 87.62 56 Ba 88.91 9594 74 106.4 107.9 79 Au Hg 1124 1143 81 TI 118.7 82 Pb 1218 83 127.6 64 Po 1269 85 131.3 86 6…

The given statements are from a description of the element lead in a reference handbook. Classify each statement as a qualitative or quantitative description of lead. Its elemental symbol is Pb. Qualitative It has a density of 11.3 g . cm-³. Its molecular mass is 207.2 amu. Answer Bank It has a melting point of 327.462 °C and a boiling point of 1749 °C. Quantitative It is a bluish-white metal of bright luster. It is very soft, highly malleable, ductile, and a poor conductor of electricity.

Your 50 mL beaker has a mass of 5.85 g. You add 10.00 mL to the 50 mL beaker and now the total mass is 16.05 g. You originally used 5.29 g of NaCl to make the solution. What is the percent composition of your solution?

What is the mass of 1.91 x 10^23 atoms of nitrogen? ____ grams What is the mass of 3.91 x 10^23 molecules of nitrogen? ____ grams What is the mass of 1.10 x 10^24 atoms of oxygen? ____ grams What is the mass of 9.26 x 10^23 molecules of oxygen?  _____grams     PLEASE ANSWER ALL THE QUESTIONS ITS ACTUALLY ALL IN ONE SINGLE QUESTION, THANK YOU!

Read the descriptions below of two substances and an experiment on each. Decide whether the result of the experiment tells you the substance is a pure substance or a mixture, if you can. • Sample A is 100. g of a coarse grey powder with a faint unpleasant smell. 15. g of the powder is put into a funnel lined with a sheet of thick paper. Distilled water is poured slowly over the powder. All of the powder disappears, and the water under the funnel turns a deep purple. • Sample B is a solid yellow cube with a total mass of 50.0 g. The cube is ground to a fine orange powder and added to a 500 mL beaker full of water. The beaker is stirred vigorously. Some of orange powder settles to the bottom of the beaker, and some rises to the top and floats on the water. When the powder at both the bottom and the top of the beaker is filtered out, dried, and weighed, the total mass is measured to be 50.1 g. pure substance Is sample A made from a pure substance or a mixture? If the description of the…

Someone invents a new unit of measurement called a musk and defines that 5 musk is equal to exactly 107g. How many musk are in 53.95 g? 5.395x108 musk O 5.395x107 musk 1.079x107 musk O 1.079x10-6 musk O 9.270x10-9 musk