If 1.4555 g of phenyl bromide are involved in the Grignard reaction, how many millimoles of phenyl bromide are present?  Round your answer to the correct number of significant figures. Do not include the units in your answer

A chemist needs to add 3.5 moles NaClNaClto a reaction. How much NaCl should she measure out in grams (g)? Round to two decimal places if necessary.      140.21g NaCl   204.54g NaCl   58.44g NaCl   0.60g NaCl

If 5.45 g of potassium chlorate are decomposed to form potassium chloride, 1.75 g of oxygen gas are also given off. Find the percent yields. - 2 KCIO3 → 2 KCI + 3 02 Please remember significant figures in your answer! Units not required.

A student sets up the following equation to solve a problem in solution stoichiometry. (The ? stands for a number the student is going to calculate.) Enter the units of the student's answer. (0.19 L) 1 mL 10-³ 146.86 g mol 1.04 mL = ☐ x10 ロ･ロ X I 00

[Tutorial: Limiting reactant stoichiometry] This question will walk you through the steps of calculating the mass of products produced based on your determination of the limiting reactant.   b) Step 2a: Use dimensional analysis to determine the theoretical yield of the product. Calculate the theoretical yield in grams Al₂O₃ from the complete reaction of 64.7 grams Al according to the following balanced chemical equation: 2 Al(s) + Fe₂O₃(s) → Al₂O₃(s) + 2 Fe(s) c) Calculate the theoretical yield in grams Al₂O₃ from the complete reaction of 201 grams Fe₂O₃ according to the following balanced chemical equation: 2 Al(s) + Fe₂O₃(s) → Al₂O₃(s) + 2 Fe(s) d) Which of the following substances is the limiting reactant? e) What is the mass in grams of the excess Fe₂O₃ remaining after the partial reaction of 201 g Fe₂O₃ with 64.7 g Al? Give your answer to three significant figures.

Is H₂O₂ being created or destroyed by the chemical reaction? If H₂O2 is being created or destroyed, what is the rate at which it is being created or destroyed 1000 seconds after the reaction starts? Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol. If H₂O₂ is being created or destroyed, what is the average rate at which it is being created or destroyed during the first 1000 seconds of the reaction? Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol. ооо created destroyed neither created nor destroyed 0 x10 00 X Ś 0

Two solutions are combined: 611 mL of 139 mM MgSO4 and 566 mL of 174.5 mM NH4OH. How many moles of Mg(OH)2 are formed during the reaction? Report your answer in scientific notation (1.23e4). Remember to identify the limiting reactant.

Consider the general chemical equation 3A+B→2C. Part A. If 1.45 g of A reacts with 1.75 g of B, what is the mass of C? Express your answer with the appropriate units. Part B. If 4.70 g of A reacts to produce 8.95 g of C, what is the mass of B? Express your answer with the appropriate units.

In an experiment to determine the empirical formula of magnesium chloride, 0.50 g of magnesium ribbon was taken in a beaker and a few drops of HCl was added until all the Mg reacted with the acid liberating the hydrogen gas. The reaction completion was noted by observing that the bubbling stopped and no solid Mg was seen in the beaker. The beaker was heated to remove water and the dried magnesium chloride was weighed and found to be 1.99 g. What is the empirical formula for magnesium chloride based on this experiment?

Consider the following data gathered in the "Molar Mass of a Gas" experiment.   * Mass of the empty reaction test tube: _____27.54_____ g * Mass of the test tube and MnO2 used in the reaction: ____28.04___ g * Mass of the test tube, KClO3 (MM = 122.55 g/mol) and MnO2 used in the reaction: ____29.31___ g * Mass of the test tube and its contents after the reaction: ____ (2.87x10^1) _____ g * Volume of the bubble of oxygen generated in the experiment: ___356___ mL * Atmospheric pressure in the lab: ______766.06______ mm Hg * Vapor pressure at reaction temperature: _____18.6_____ m Hg   Calculate the mass of oxygen generated in the reaction