3.04 Conservation of Mass Questions

please answer this question on paper correctly with the correct answer, and math written in the correct dimensional analysis format.   Question: What is the molar mass of Sucrose (C12H22O11)?

Determine the standard enthalpy change for each of the following reactions. Report your answers to the nearest 0.1 kJ. Appendix D Part 1 2NH3(g)+302(g)+2CH4(g) 2HCN(g)+6H2O(g) kJ eTextbook and Media Hint Part 2 2AI(s)+3CI2(g) 2AICI3(s) kJ

An analytical chemist measures the amount of Elements E₁ and E₂ in four samples of an unknown Substance. sample of E1 1 2 3 mass mass of E2 4 16.0 g 9.1 g 17.1 g 9.8 g 18.5 g 10.6 g 12.0 g 6.9 g It's known that X contains no elements other than E₁ and E₂. Using this information, answer the questions in the table below. Is X a pure substance or a mixture? If you don't have enough information to decide, choose can't decide. If you said X is a pure substance, calculate the mass of Element E₁ the analytical chemist would find in a new 10.0 g sample of X. Round your answer to 2 significant digits. O pure substance O mixture O (can't decide) g

Performing the same experiment described on your lab manual, a student used a 0.400 g sample of Alka-Seltzer and the mass of CO2 was found to be 0.114 g. Based on this result, answer the following questions: Determine the mass of NaHCO3 that produced the CO2 in the experiment. (enter your answer to 3 significant digits)

student found a bottle of unknown origin in the basement of an "CAUTION—contains С₁H₁O.” No other A old house. The bottle was labelled information was given, but inside the bottle were some white crystals. The student took the bottle to a chemistry laboratory, where she analyzed the crystals with the help of the laboratory staff. C₁2H₁6O reacted with Br₂ in CCl4 adding one mole of Br, and forming C₁₂H₁OB2₂. When a sample of C₁₂H₂O was reacted with O3 followed by Zn/H₂O, two different samples, J and K, were obtained. Compound J had a molecular formula of C.HgO₂, and its NMR is shown below. Compound K had a molecular formula of C₂H₂O, and it could be oxidized to compound L, with a molecular formula of C₂H₂O₂. The IR spectrum of L showed a very wide, strong band centred around 3000 cm*¹. The NMR spectrum of L showed only two different absorptions: a doublet (6H) at 0.9 ppm and a septet (1H) at 3.6 ppm. There was also a singlet (1H) off the scale at 11.8 ppm. students, deduce possible…

A cup of granulated sugar also known as sucrose(12H22O11) weighs 180 grams. How many atoms are in the sugar in this cup? Help please

Performing the same experiment described on your lab manual, a student used a 0.400 g sample of Alka-Seltzer and the mass of CO2 was found to be 0.114 g. Based on this result, answer the following questions: Determine the % mass of NaHCO3 in the sample. (enter your answer to 3 significant digits) Determine the mass of NaHCO3 in the tablet assuming the mass of the tablet is 3.50 g. (enter your answer to 3 significant digits)

In the figure shown, is a chemical reaction occurring? Yes, because the atoms have rearranged to form a new substance. Yes, because the reactants are gases, but the product is a solid. No, because both the reactants and products are colorless gases. No, because there are oxygen atoms and carbon atoms in both images. No, because there are the same number of atoms in both images. 00000

Consider these compounds: A. Zn3(PO4)2 B. Ag₂CO3 C. Ca3(PO4)2 D. Ag₂SO4 Complete the following statements by entering the letter(s) corresponding to the correct compound(s). (If more than one compound fits the description, include all the relevant compounds by writing your answer as a string of characters without punctuation, e.g, ABC.) Without doing any calculations it is possible to determine that barium fluoride is more soluble than and barium fluoride is less soluble than. It is not possible to determine whether barium fluoride is more or less soluble than values. by simply comparing Ksp

How many molecules of C2H6 are there in 21.4 g of C2H6? (Please write your answer on a piece of paper. No need to type anything here). Edit View Insert Format Tools Table 12pt v Paragraph v BIU T² v O words I| Proctorio is sharing your screen. Stop sharing Hide Question 20

Calculate the moles of anhydrous (dry) KAl(SO4)2 that were present in the sample. Show all work to answer this question by uploading an image of your calculations into Photo 2. Calculate the ratio of moles of H2O to moles of anhydrous KAl(SO4)2. Show all work to answer this question by uploading an image of your calculations into Photo 3. Note: Report the ratio to the closest whole number. Write the empirical formula for the hydrated KAl(SO4)2, based on your experimental results and answer to Question 2. Show all work to answer this question by uploading an image of your calculations into Photo 4. Describe any visual differences between the hydrated sample and the dried, anhydrous form. How would the following errors affect the empirical formula for the compound?  a. The student ran out of time and did not do the second heating. Explain how this error will affect the calculation for the number of moles of water in the hydrate? Will the final answer be artificially high or low? How do…

Calculate the moles of anhydrous (dry) KAl(SO4)2 that were present in the sample. Show all work to answer this question by uploading an image of your calculations into Photo 2. Calculate the ratio of moles of H2O to moles of anhydrous KAl(SO4)2. Show all work to answer this question by uploading an image of your calculations into Photo 3. Note: Report the ratio to the closest whole number. Write the empirical formula for the hydrated KAl(SO4)2, based on your experimental results and answer to Question 2. Show all work to answer this question by uploading an image of your calculations into Photo 4. Describe any visual differences between the hydrated sample and the dried, anhydrous form. How would the following errors affect the empirical formula for the compound?  a. The student ran out of time and did not do the second heating. Explain how this error will affect the calculation for the number of moles of water in the hydrate? Will the final answer be artificially high or low? How do…

A sample of iron weighing 15.0 g was heated with potassium chlorate (KCIO3) in an evacuated container. The oxygen generated from the decomposition of KCIO3 converted some of the Fe to Fe2Oe. If the combined mass of Fe and Fe203 was 17.9 g, calculate the mass of Fe203 formed and the mass of KCIO3 decomposed. Please show your work for credit and comment on another students such as asking a question or pointing the student in the right direction.

3. A Chemistry 11 student tries to explain that based on the ratio of the reactants in the reaction below, 1.0 g of calcium reacts with 1.0 g fluorine gas (F,). Using math and logic, explain to this student why he is wrong. Ca+ F2e CAF2(s)

2. In a Mars Direct mission, the astronauts would return home in an Earth Return Vehicle (ERV) fueled by     methane and oxygen produced from terrestrial hydrogen and Martian CO2     helium-3 extracted from the lunar surface     finely-ground Martian rocks accelerated by an electromagnetic mass driver     cheap, traditional kerosene fuel brought from Earth   We might go back to the Moon someday to mine the lunar surface for an energy resource called     methane     antimatter     hydrazene     helium-3

Can somebody help?

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Which equation below violates the law of conservation of mass? a. 2H2+ O2 → 2H2O b. KCl + Br → KBr + Cl2 c. 2FE2O3 + 3C → 4Fe + 3CO2 d. Na2CO3 + 2HC1 → 2NaCl+ H2O + CO2 A O D

How many moles Ca(Mno4)2 are present in 360,000,000,000,000,000,000,000 formula units of Ca(Mno4)2? Show work on your paper using dimensional analysis and units. In the box below, enter your numeric answer only.

afari File Edit View History Bookmarks Window Help www-awn.aleks.com alex Yahoo Search Results Yahoo Search Results ALEKS O STOICHIOMETRY Using the Avogad ro Number -23 g and a small airplane has a mass of 5000. kg. An aluminum atom has a mass of 4.48 x 10 Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of aluminum atoms? x10 ? X How many moles of aluminum atoms have a mass equal to the mass of a small airplane? Expation Check 2019 McGraw- 80 AUG 19 II