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- Use the data below to determine the mmoles of sodium oxalate to 2 decimal places. (MM sodium oxalate = 134 g/mol) %3D mass of sodium oxalate (g) 0.093 initial buret reading (mL) final buret reading (mL) 16.09How many mL of 0.799 molar magnesium chloride must a scientist pour into a beaker to have 16.1 g of magnesium chloride in the beaker? Put answer in box in regular non scientific notation with one past decimal.How many grams F in 650.1 g Br,F,? Put the answer in the box in regular (non-scientific) notation. Use one figure past the decimal.
- = MATH AND PHYSICS Power and quotient rules... Simplify. (3₁²) ² 3 (4₂²)³ Write your answer using only positive exponents. 0 S 0/3Use calculator to solve the problems. Write your answer in scientific notation with correct number of sig fig. Enter numbers only, no units. Enter scientific notation as (number)E(exponent) for example: enter 2 x 104 as 2E-4 (note there are no spaces) 9.4 x 10-6 mol 4.5 x 103 LWhat is the molar mass of alanine, C3H7NO2? • Write your answer using ONE decimal place, even if this is not the correct number of significant figures. • Do NOT include units.
- Atomic masses are measured in atomic mass units (amu). The amu, (1.66)(10-27) kilogram, is defined as 1/12 the mass of a common carbon atom. Find the mass of a carbon atom in kilograms. Express the result in scientific notation.Calculate the number of hydrogen atoms in a 100.0 g sample of ammonia (NH,). Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits. x101) State your interpretation of the meaning of the slope for the first graph you prepared of Volume of Steel Nuts (mL) versus Number of Steel Nuts. Hint: Understanding the meaning of a slope involves several factors: the units which are a ratio of the y axis units over the x axis units, the interpretation of the slope as “number of the y axis units for every one of the x axis units” and the concept that constructing the best line or curve that follows the trend in the data is a sort of averaging of the random error throughout the data.
- A chemist adds 250.0 mL of a 0.00378 mM calcium sulfate (Caso,) solution to a reaction flask. Calculate the mass in milligrams of calcium sulfate the chemist has added to the flask. Be sure your answer has the correct number of significant digits. mgA chemist makes 270. mL of barium chloride (BaCl,) working solution by adding distilled water to 210. ml. of a 46.3 mM stock solution of barium chloride in water. Calculate the concentration of the chemist's working solution. Be sure your answer has the correct number of significant digits. XSet the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols.