Q7 You have a stock solution that contains 78 mM calcium carbonate. You need to make 98 mL of a solution that contains 10 mM calcium carbonate. How many mL of the stock solution do you need to use? Answer to 2 decimal places Read about significant figures and rounding in the Helpful Resources page! Do not include units when reporting your answer Use standard notation as accepted by Canvas e.g. 0.01

Q: How do I solve this question? The answer has to be in scientific notation and rounded to the…

A: The scientific notation is a way to express the numbers that are either very large or small in a…

Q: Give the volume indicated. Be sure to include all significant figur 3.5 3 2.5

A: Voulme is defined as amount of space that something conatins

Q: A chemist needs to know the mass of a sample of Na, SO, to 4 significant digits. She puts the sample…

A: The significant figures (also known as the significant digits or precision) of a number written in…

Q: A chemist prepares a solution of barium acetate BaCH3CO22 by measuring out 230. μmol of barium…

A: Volume of solution = 500 ml = 0.500 L Number of moles = 230 μmol = 0.230 mmol Here we have to find…

Q: A chemist makes 390. mL of silver(II) oxide (Ago) working solution by adding distilled water to 90.0…

A: Volume of solution (V1) = 390 ml Concentration (C1) = to find Volume (V2) = 90.0 ml Concentration…

Q: Which piece of laboratory equipment can make the most precise measurements? Top-loading balance (in…

A: In chemistry laboratory we always prefer an instrument which is having more no. Of measuring units .

Q: A chemist must prepare 825. mL of 2.00 M aqueous aluminum chloride (AlCI,) working solution. He'll…

A: Dilution of the solution: When we dilute a concentrated solution with pure water, the mole of solute…

Q: A mixture of ethanol and water is prepared in the lab. Ethanol has a density of 0.789 g/mL. 47.3 mL…

A:

Q: mL. What is t

A: To find the density of the substance whose mass of the substance is 50g  volume is 85.0ml

Q: A chemistry student must write down in her lab notebook the concentration of a solution of potassium…

A:

Q: 1. Describe how to use conversion factors correctly using an example. 2. Write a number between…

A: Describe how to use conversion factors correctly using an example.Conversion factors are used to…

Q: A major component of gasoline is octane (C,H,). When octane is burned in air, it chemically reacts…

A: We will first write balanced stoichiometric equation, then using it calculate mass of oxygen…

Q: A chemist prepares a solution of iron(III) bromide (FeBr,) by measuring out 79. umol of iron(III)…

A: Molarity of solution is defined as, moles of solute present per liter of solution.

Q: A Calculate the mass of water needed to make a 10.0% solution using 5.25 grams of sodium hydroxide.…

A: This questions are based the concentration term mass percentage. Mass percentage is simply the grams…

Q: Calculate the volume in milliliters of a 2.4M sodium chloride solution that contains 75.0 g of…

A: According to the question, The molarity of the NaCl is = 2.4 M = 2.4 mol/L The mass of the NaCl =…

Q: A student sets up the following equation to convert a measurement. (The ? stands for a number the…

A: In the given question we have to do the following conversion from mole/kg to mole/g .

Q: A chemist prepares a solution of sodium chloride (NaCl) by measuring out 55.4 μmol of sodium…

A:

Q: What is the percent by mass NaCl of a solution that contains 59.9 grams of NaCl and 87.6 grams of…

A: Solution: Here we have a solution contain 59.9 g NaCl and 87.6 g of water. To calculate: percent by…

Q: Liquid hexane (CH3(CH2)CH3) will react with gaseous oxygen (O2) to produce gaseous carbon dioxide…

A: The number of moles of oxygen and hexane are calculated as,

Q: 2. Evaluate each of the following expressions. State the answer to the proper number of significant…

A: Rules for writing significant figures in addition subtraction multiplication and division; In case…

Q: Rewrite this number in nonscientific notation, to the correct number of significant figures. 5.15 x…

A: The nonscientific notation of the above number is given below

Q: Enter an equality for the following medication in stock: 1.0 g of Cefuroxime per 1 mL of Cefuroxime…

A:

Q: What is the volume of an object of mass 20.00 g and density 2.0 g/mL? 1._______ / 2._______ =…

A: Given the mass of the object, m = 20.00 g  density of the object, d = 2.0 g/mL

Q: Write each of the following numbers to 3 significant figures in exponential or scientific notation.…

A: Significant figure on a number in positional notation are the digits in that number which are…

Q: Solve the following problems. Make sure to express your answers in scientific notation and end with…

A:

Q: How many grams of AlCl3 are required to make 55.5 mL of a 3.6 M AlCl3 solution? Give your answer…

A: The volume of AlCl3 solution is 55.5 mL.The molarity of AlCl3 solution is 3.6 M.To find the grams of…

Q: Calculate the volume in milliliters of a 2.4M sodium nitrate solution that contains 125. g of sodium…

A: Given data, Molarity of NaNO3 = 2.4 M                                  = 2.4 mol/ L Mass of NaNO3 =…

Q: What is the density of an object of mass 200.00 g and volume 25.0 mL? 1._______ / 2._______ =…

A: Given: Mass of object = 200.00 g And volume of object = 25.0 mL.

Q: Convert the following measurement. mol mol 9.3 x 10 2 2 kg m g•cm

A: 1 kilogram (kg) is equal to 1000 gram (g). And 1 m is equal to 100 cm.

Q: A scientific theory is a tentative explanation for an observation.   Question 1 options:   True…

A: Significant numbers rule -  During addition or subtraction, the answer is rounded to least number of…

Q: The density of your soda mixture after removing all carbon dioxide was found to be 0.91 g / m * L…

A: In the given question we have to calculate the volume of soda mixture. We have to use the formula of…

Q: 1) Convert 73.5 F to Celsius. Report your answer with the correct number of significant figures.…

A: 1) Given : Temperature in oF = 73.5 oF

Q: A student measured 10.5 mL of a stock caffeine solution with a concentration of 52.3 mg/mL and…

A: Initial volume V1 = 10.5 mLInitial concentration M1 = 52.3 mg/mLFinal volume V2 = 29.5 mLFinal…

Q: A chemist prepares a solution of silver perchlorate (AgCIOA) by measuring out 0.869 kg of silver…

A:

Q: convert 7.569 kg/mL to units of of microgram/ L

A: 1 Kg = 109 microgram   and  1 mL = 10-3 L  7.569Kg/mL = 7.569 ×1012 microgram/ L

Q: Gaseous ethane (CH,CH,) will react with gaseous oxygen (O,) to produce gaseous carbon dioxide (CO,)…

A: Recall the equation that will occur here     2C2H6 g+ 7O2g→4CO2 g+ 6H2Og Find moles of 2.10 g of…

Q: O CHEMICAL REACTIONS Using molarity to find solute mass and solution volume A chemist adds 390.0 mL…

A:

Q: Calculate the volume in liters of a 6.9 x 10 mol/L silver(II) oxide solution that contains 25.0 g of…

A: Given: Molarity of AgO solution is 6.9×10-5 mol/L. Mass of AgO is 25.0 g.

Q: Convert 2.00mm to meter A) 0.00200m B) 0.0200m C) 0.200m D) 0.000200m E) none

A:

Q: Write each of the following numbers to 3 significant figures in exponential or scientific notation.…

A: A question based on tools in analytical chemistry that is to be accomplished.

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.