measurement report

I am stuck on question 4, I found everything else and I am stuck on the last part

Please help with column E

Round 0.221 to one sig. Fig

Complete the table and answer the following questions.

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View History Bookmarks Develop Window Help A east.cengagenow.com [References) 1 pt EXERCISE Unit Conversion 1 pt Drag conversion units onto the boxes in the equation to make conversions. Some boxes can be left empty. Click on a unit to remove it from its position. 1 pt 1 cm³ Cu 9 g Cu 9.5 x 1021 atoms Cu 1 g Cu 1 pt 1 kg 1000 g 1 cm = 1 mL 1 pt 1 L 1000 cm3 1 pt 1 pt 520 L x 1 pt 1 pt 1 pt A piece of copper has a volume 520 L. What is the mass of the sample, in units of grams? In the boxes above, enter the correct setup that would be used to solve this problem. 1 pt 1 pt Check Next (2 of 3) 1 pt 1 pt Submit Answer Try Another Version 2 item attempts remaining 1 pt

The law of constant composition applies to __________. Group of answer choices heterogeneous mixtures compounds homogeneous mixtures solutions solids

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What is the average ratio in this chart? Please show me the calculation too!    Sample 1 2 3 Calculations for sample 1 Mass of aluminum dish   1.24g 1.26g 1.24g - Mass of aluminum dish + Epsom salt   1.70g 1.94g 1.80g -   Epsom salt, original (hydrated) mass 0.46g 0.68g 0.56g 1.70g – 1.24g = 0.46g Mass of aluminum dish + Epsom salt after heating 1.42g 1.62g 1.61g   Epsom salt, heated (dehydrated) mass 0.18g 0.36g 0.37g 1.42g- 1.24g = 0.18g Mass of water 0.28g 0.32g 0.19g 0.46g – 0.18g = 0.28g Moles of magnesium sulfate 0.0015mol 0.0030mol 0.0031mol 0.18g x (1mol/120.37g)= 0.0015mol Moles of water 0.016mol 0.018mol 0.011mol 0.28g x (1mol/18.02g) = 0.016mol Ratio of moles water: moles of magnesium sulfate 32:3 18:3 11:3.1 0.016 : 0.0015= 32:3 Average Ratio

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NAME________________________________________________DATE: 112020 Devise a system of chemical symbols that is easy to use by answering the questions below. Look up the symbols for the following elements: hydrogen . . . . . . . . . . . . . . . . . _______________ oxygen . . . . . . . . . . . . . . . . . . . _______________ nitrogen . . . . . . . . . . . . . . . . . . _______________ carbon . . . . . . . . . . . . . . . . . . . _______________ sulfur . . . . . . . . . . . . . . . . . . . . _______________ fluorine . . . . . . . . . . . . . . . . . . _______________ iodine . . . . . . . . . . . . . . . . . . . _______________ phosphorus ............... _______________ What rule was used to come up with these symbols?   Look up the symbols for the following elements: calcium . . . . . . . . . . . . . . . . . . _______________ cadmium . . . . . . . . . . . . . . . . . _______________ cesium ................... _______________ cerium . . . . . . . . . . . . . . . . . . . _______________…

Which scale is most useful for reporting data from the spectrometer? Why?

ome some City University o... Works - Kingsbo... both - Blackboard... tion-CLEARED4 Scientific Method? 7... # 2 6.02 QUESTION 7 One mole of particles of any substance contains how many particles? 3 × 10-10 particles 3 x 1010 particles 106 particles 6.02 x 10-23 particles 6.02 x 1023 particles Click Save and Submit to save and submit. Click Save All Answers to save all ans 3 16 MAR 23 245 átv 7 2

tributi X Normal Distributi X ample Work rmat Tools Extensions Help locument/d/1KWoB0hrXolu7UEKbq4f8LBMHfpjHBRVU3qUzVI7K80U/edit Saved to Drive Normal text I 2022-2023 Mr. R X - I ▼ | Calibri 1 16 11. Which quantity is used to define 1 atomic mass unit? 3 100 Copy of Chern B x I UA 4 5 hp 4/27 - Unit 5.mp4 X particles. 12. How many molecules are there in 2 g of water (H₂O)? HINT: Molar mass of water is 18 g/mol Pathway: mass → moles → molecules E Did You Know? The word mole represents a specific number of objects, 6.022 × 10²¹ , just as the word dozen represents a specific number of objects, 12. The molar mass is the mass of a substance that contains 6.022 × 10²¹ DC Normal DE VE E 127 64°F Mos

A _____ change involves atoms being rearranged into new combinations, resulting in new compounds.     Chemical     Physical     Hypothesis     Mixture

OWLV2 | Assign x * MindTap - Cen X MindTap - Cen X G amu of ca - Go X b My Questions /ui/evo/index.html?elSBN=9781337790840&id3D299783426&snapshotld%=785765& + x GAGE MINDTAP 8: Chemical Composition Ę AA e. strontium chloride Answer + 31. Calculate the number of moles of the indicated substance present in each of the following samples. a. 21.4 mg of nitrogen dioxide b. 1.56 g of copper(II) nitrate c. 2.47 g of carbon disulfide d. 5.04 g of aluminum sulfate e. 2.99 g of lead(II) chloride f. 62.4 g of calcium carbonate 32. Calculate the number of moles of the indicated substance present in each of the following samples. a. 47.2 g of aluminum oxide 53 F insert pua F12 prt sc home F10 F11 F7 F4 F5

The astronaut then measures the abundance of silicon on the new planet, obtaining the following results: Abundance Mass Isotope (%) (amu) 28 Si 73.71 27.98 29 Si 14.93 28.98 30 Si 11.36 29.97 What is the atomic mass of silicon for this planet? Express your answer to two decimal places, and include the appropriate units. • View Available Hint(s) HẢ ? Value Units Submit

can someone help me with this? questions 1-5 I need it before midnight... please help me. thank you so much