A chemistry student needs 40.0mL of pentane for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of pentane is ·0.626gcm−3 . Calculate the mass of pentane the student should weigh out. Be sure your answer has the correct number of significant digits.

Aqueous hydrobromic acid (HBr) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium bromide (NaBr) and liquid water (H₂O). Suppose 0.81 g of hydrobromic acid is mixed with 0.124 g of sodium hydroxide. Calculate the maximum mass of sodium bromide that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits. g x10 X E

A chemist prepares a solution of sodium hyposulfate (Na₂S₂O3) by measuring out 256. µmol of sodium hyposulfate into a 500. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in µmol/L of the chemist's sodium hyposulfate solution. Be sure your answer has the correct number of significant digits.

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v1 2 v 3 7. 08 v 10 11 v 12 v 13 10 The radius of a copper (Cu)atom is roughly 1.3 x 10 m. How many times can you divide evenly a 893.4 cm long piece of copper wire until it is reduced to two separate copper atoms? (Assume there are appropriate tools for this procedure and that copper atoms are lined up in a straight line, in contact with each other. Round your final answer to the nearest integer.) times Save For Later Submit Assign Check 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Acce 79 F 99+ P Type here to search 41AWEI

A chemist adds 375.0 mL of a 0.012 mM iron(II) bromide (FeBr₂) solution to a reaction flask. Calculate the mass in milligrams of iron(II) bromide the chemist has added to the flask. Be sure your answer has the correct number of significant digits. mg x10

A chemistry student needs  85.0mL  of acetone for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of acetone is  ·0.790gcm−3 . Calculate the mass of acetone the student should weigh out. Be sure your answer has the correct number of significant digits.

A chemist adds 430.0 mL of a 2.89 mol/L calcium bromide (CaBr₂) solution to a reaction flask. Calculate the mass in kilograms of calcium bromide the chemist has added to the flask. Be sure your answer has the correct number of significant digits. kg X10 X S

The chemical formula for sodium bromide is NaBr. A chemist measured the amount of sodium bromide produced during an experiment. She finds that 182. g of sodium bromide is produced. Calculate the number of moles of sodium bromide produced. Be sure your answer has the correct number of significant digits.

A chemist prepares a solution of aluminum chloride (AlCl,) by weighing out 7.327 g of aluminum chloride into a 250. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in g/dL of the chemist's aluminum chloride solution. Be sure your answer has the correct number of significant digits.