(87.5−22.541)÷ 0.0058    Express your answer to the appropriate number of significant figures.

A tablet of Mylanta antacid contains 0.300 g Mg(OH)2 and 0.200 g Al(OH)3. For the blanks in this question: Report here only your numerical answers (without units), if the value is less than zero as a decimal (not in scientific notation), to the correct number of significant figures. Mg(OH)2 (molar mass:  58.32 g/mole) Al(OH)3 (molar mass:  78.00 g/mole) How many moles Mg(OH)2 are present in the tablet?  How many moles of Al(OH)3 are present in the tablet?  How many moles of HCl are required to neutralize the Mg(OH)2 in the tablet?    Start this question by using your rounded answer from #1. How many moles of HCl are required to neutralize the Al(OH)3 in the tablet?    Start this question by using your rounded answer from #2. How many moles of HCl acid will be required to neutralize both the Mg(OH)2 and the Al(OH)3 in the tablet?    Use your rounded answers from #3 and #4 to answer this question. How many milliliters of 0.200 M HCl can be neutralized by one tablet?    Use your rounded…

(Incorrect) An impure sample of hydrocarbon having a total mass of 41.0 g undergoes combustion analysis to generate 82.6 g CO₂(g) and 16.9 g H₂O(g). Assuming that the impurities do not contain carbon or hydrogen, what percentage of the initial sample is the pure hydrocarbon? Provide the numerical value of your response in decimal notation rounded to 3 significant figures. You answered: 4.58 The correct answer is: 59.5%

Two students were tasked to weigh 100 mg of sodium chloride (NaCI). Student A pressed the tare button after weighing the weighing paper and obtained the following data. What is the mass (g) of NaCl from Student A? Mass of weighing paper (g) 0.0011 Mass of weighing paper + NaCl (g) 0.1050 Mass of the NaCI (g) Your answer While Student B did not press the tare button after weighing the weighing paper and obtained the following data. What is the mass (g) of NaCl from Student B? * Mass of weighing paper (g) 0.0011 Mass of weighing paper + NaCI (g) 0.1010 Mass of the NaCI (g) Your answer

An electric current of 24.70 A transports 410. µC of charge: Calculate the time this took. Be sure your answer has the correct. unit symbol and 3 significant digits. 0 x10 ロ・ロ H Ś

A chemist prepares a solution of silver(I) nitrate AgNO3 by measuring out 6.4102 x 10^2 μmol of silver(I) nitrate into a 450.mL volumetric flask and filling the flask to the mark with water.  Calculate the concentration in mol/L of the chemist's silver(I) nitrate solution. Round your answer to 2 significant digits.

In the opening scene of the movie Raiders of the Lost Ark, Indiana Jones tries to remove a gold idol from a booby-trapped pedestal. He replaces a gold (D = 19.32 g/cm²³) idol of dimensions 5.0 inches by 5.0 inches by 5.0 inches with a bag of sand of approximately double the volume with sand (D = 3.65 g/cm³). Is the bag of sand really equal to the gold idol or will Dr. Jones set off the trap? Explain your answer and include a mathematical explanation. ML Cm3

What is the answer for the following calculation: (1.249 - 0.0234) × 139.37 ? A) 170.812 B) 170.8 C) 170.81 How many grams of iron are in 350. mg of iron? A) 0.350 g B) 3.50 g C) 35.0 g Express 1.40 x 10-3 L in decimal notation. A) 0.00140 L B) 0.0014 L C) 0.014 L A statement about mass always being conserved in a chemical reaction is an example of a B) hypothesis A) theory C) law

A chardonnay wine is 13.5 percent by mass alcohol. If we consume 24 fluid oz of wine, and the density of the wine is 0.982 mg/mL, how much alcohol was consumed? 09.6 x 103 g alcohol O 301 g alcohol O 94 g alcohol O 106 g alcohol O 13.3 g alcohol

Take the mass measurement with nitrogen (28 dalton or atomic mass units per molecule) and the mass measurement with helium (4 daltons per atom) and use the difference between the measured masses to find the mass of 1 dalton (one atomic mass unit) in grams. The standard value of the dalton is 1.66053906660×10−27 kg with an uncertainty of ±50 in the last two figures. Can you identify the sources of error in your measurement?