An aluminum plant produces 98 million kg of aluminum per year. Part A How much aluminum oxide is required? Express your answer to two significant figures and include the appropriate units. 1.9x10 kg ✓ Correct Correct answer is shown. Your answer 1.85-10 kg was either rounded differently or used a different number of significant figures than required for this part Part B Previous Answers How much bauxite is required? (It takes 2.1 kg of crude bauxite to produce 10 kg of aluminum oxide) Express your answer to two significant figures and include the appropriate units. Submit μA Value Units Pequest Answer

An aluminum plant produces 98 million kg of aluminum per year. Part A How much aluminum oxide is required? Express your answer to two significant figures and include the appropriate units. 1.9x10 kg ✓ Correct Correct answer is shown. Your answer 1.85-10 kg was either rounded differently or used a different number of significant figures than required for this part Part B Previous Answers How much bauxite is required? (It takes 2.1 kg of crude bauxite to produce 10 kg of aluminum oxide) Express your answer to two significant figures and include the appropriate units. Submit μA Value Units Pequest Answer

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter2: Measurements And Calculations

Section: Chapter Questions

Problem 3QAP: When a large or small number is written in standard scientific notation, the number is expressed as...

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You go to a convenience store to buy candy and find the owner to be rather odd. He allows you to buy pieces only in multiples of tour, and to buy four, you need $0.23. He allows you only to use 3 pennies and 2 dimes. You have a bunch of pennies and dimes, and instead of counting them, you decide to weigh them. You have 636.3 g of pennies, and each penny weighs an average of 3.03 g. Each dime weighs an average of 2.29 g. Each piece of candy weighs an average of 10.23 g. How many pennies do you have? How many dimes do you need to buy as much candy as possible? How much would all of your dimes weigh? How many pieces of candy could you buy (based on the number of dimes from part b)? How much would this candy weigh? How many pieces of candy could you buy with twice as many dimes?
The density of a certain metal is (6.60x10^0) g/cm3. What is the mass in grams of a sample of this metal that has a volume of (8.460x10^-2) m3? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer:
A sample of gold alloy has a mass of 9.3 kg. It is determined that 0.6 kg of the alloy is actually made up of copper and zinc, with the remainder being gold. Calculate the percentage of this gold in the alloy? Express your answer to the nearest percentage (nearest ones place). Hint: calculate the mass in grams of the gold in the alloy, divide by the whole mass of the alloy, and multiply by 100%. Round your answer to two significant figures. (I had to alter the wording of this question since it wasn't calculating significant figures properly, so if you got it wrong because of significant figures you can assume you probably actually got it correct.)
A density bottle test on a sample of dry soil gave the following results:Mass of 50ml density bottle empty (g) = 25.07Mass of 50ml density bottle+20g of dry soil particles (g) = 45.07Mass of 50ml density bottle+20g of dry soil particles, with remainder of space in bottle filled with water (g) = 87.55Mass of 50ml density bottle filled with water only (g) = 75.10Calculate the relative density (specific gravity) of the soil particles. Round your answer to 2 decimal places.
The mass of preheated crucible with cover was 12.1125 g. After the hydrate sample was added, the weight increased to 13.1533 g. After heating the crucible for three times in order to remove hydrate water and bring it to the constant weight the lowest of the three mass measurements was 12.9971 g. 1)What is the mass percent of water in the hydrate? Please report your answer with the correct number of significant figures but without "%" (Canvas will not let you to enter units in this problem). 2) What is the theoretical mass % of water in the hydrate if the salt is BaCl2 x 2H2O? Make sure you use enough significant figures for the atomic weights of the elements and round your answer to 3 decimals. 3) What is the mass of the hydrate placed in the crucible? 4) What is the mass of the anhydrous salt?
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having so much trouble understaning how to convert quantites from one metric unit to another how do you know what formula to use and what the conversion rate is ? can you explain 0.01mmol= 100 ? mol ik the anwswer is 100umol not sure how to get to answer
1.The literature for a pharmaceutical product states that 26 patients of the 2, 103 enrolled in the clinical study reported headache after taking the product which can be an adverse reaction. Calculating (a) the decimal fraction and (b) the percentage of patients reporting this adverse response? 2.Edward prepare a non-medicated plaster that was 1 3/4 inches long. If he stretched it out to 5 times its current length how long would it be? 3.The remains of Maalox® are to be combined to fill Mrs. Ramos’s prescription. They are 1/10 of a pint, 2/5 of a pint and ½ of a pint. How many pints will be in the combined product?
What is the volume (in mL) of (6.23x10^0) kg of a liquid that has a density of (1.1000x10^0) g/mL? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer:
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When you perform the following operations, how many significant figures should your answer have? 39.20 dm + 10.000 m = hint: units must match. Change small unit (dm) to match larger unit (m). Do calculation and count the sig figs