For a chemistry class, a student's grades are weighted as follows: quizzes are 30%, exams are 40%, and the final exam is 30%.   If a student scored 90, 75, and 80 on the quizzes, exams, and final respectively, calculate the student's final grade. Express your answer to three significant figures

Q: 1.00 mL is taken from a stock solution of concentration 8.47 g/L and added to a 10.0 mL volumetric…

A: Given, Stock solution: Concentration of the stock solution (C1) = 8.47 g/L Volume of the stock…

Q: When answering this problem, report the answer with the appropriate number of significant figures.…

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Q: Define chemistry and explain how burning wood isrelated to chemistry.

A: Сhemistry is the   sсienсe  thаt  deаls  with  the соmроsitiоn, рrорerties,  &  struсture  оf…

Q: Electrical energy is usually measured in kilowatt-hours, kWh. A Watt is 1 joule per second. A…

A: Unit conversion refers to the process of changing a quantity expressed in one unit of measurement…

Q: You add 297 grams of NaCl to a container and then you add 898 grams of water to that same container.…

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Q: Questions: 1. Based from the given problem, What is the molecular weight  of the tartaric acid…

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Q: A sample of gold alloy has a mass of 9.3 kg. It is determined that 0.6 kg of the alloy is actually…

A: Answer:Mass percent of a substance can be calculated as:

Q: Add mathematical symbols (+, -, *, /, v, !, etc.) to make the following expressions true. For…

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Q: You can calculate cost effectiveness using the following formula: volume of HCI neutralized per…

A: Given Brand X antacid 2 tablets/500 mg dose 40 tablets/container cost:$3.75/container To find Cost…

Q: A chemistry student weighs out 0.141 g of acrylic acid (HCH,CHCO, into a 250. ml volumetric flask…

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Q: A chemist must dilute 0.09 L of 2.98 M aqueous sodium nitrate (NaNO3) solution until the…

A: Initial volume = 0.09 L  Initial Molarity = 2.98 M  Final Molarity = 2.00 M  Final volume = ?

Q: Express the corresponding readings, taking into account the figures that you can read with certainty…

A: In the given scale we have ten divisions between marked values. That mean we have ten divisions for…

Q: 5. Given your experience in mass determinations and with volumetric glassware, which factor used -…

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Q: Wt of precipitate (Silver chloride) MW of silver nitrate MW of silver chloride Meg silver nitrate…

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Q: Norepinephrine can be analyzed in human urine. A fixed amount of DHBA was added to each sample and…

A: The objective of the question is to understand the analytical function of adding DHBA in the…

Q: chemistry student weighs out 0.0266 g of phosphoric acid (H,PO), a triprotic acid, into a 250. mL…

A: Given- Mass of phosphoric acid= 0.0266g Volume of volume flask =250 mL  Concentration of NaOH…

Q: Describe the difference between accuracy and precision. How do we determine accuracy and precision?

A: Accuracy is the measure of closer agreement between true value or accepted value and  specific…

Q: number of significant figures. To avoid rounding errors, do not round your answers until the very…

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Q: A chemistry student weighs out 0.146 g of chloroacetic acid (HCH,CICO,) into a 250. mL volumetric…

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Q: In 1993 the Minnesota Department of Health set a health risk limit for BCME in groundwater of 2.00…

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Q: An electric current of 0.650 A flows for 50.0 seconds. Calculate the amount of electric charge…

A: Given that, Current i=0.650 A time t= 50.0 seconds charge q= ?

Q: In 2014 (the last year for which I can find data), Utah County had a carbon monoxide (CO) average…

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Q: Evaluate the manager’s calculations with regard to significant digits. If necessary, rewrite any…

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Q: The combustion of ammonia in the presence of excess oxygen yields NO2 and H20: 4 NH3 (g) + 7 02 (g)…

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Q: After creating her standard curve for absorption versus the concentration (M) of FD&C Red 40 and…

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Q: Calculate the volume of NaOH solution the student will need to add to reach the De

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Q: An electric current of 52.0 mA flows for 6,0 seconds. Calculate the amount of electric charge…

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Q: A chemist prepares a solution of sodium thiosulfate (Na, S,03) by measuring out 188. g of sodium…

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Q: A chemist makes 0.440 L of mercury(I) chloride (Hg,Cl,) working solution by adding distilled water…

A: M1V1( Stock solution)= M2V2(working solution) Given: Volume of Stock solution, V1 = 0.0800 L…

Q: In 2014 (the last year for which I can find data), Utah County had a carbon monoxide (CO) average…

A: Please find your solution below : Carbon monoxide is a poisonous, colourless, tasteless and…

Q: In 2014 (the last year for which I can find data), Utah County had a carbon monoxide (CO) average…

A: Please find your solution below : Carbon monoxide is a colourless, tasteless and odourless gas…

Q: Fact, Law, Hypothesis, or Theory? __ An object less dense than the air flies up on its own. __…

A: Factt: It is known or proved to be true. Law: A scientific law is the description of an observed…

Q: A manufacturer of paint claims that a gallon (3.78 L) of latex paint can cover 365 ft2 of the…

A: Volume of Paint = 3.78 L Surface Area of wall = 365 ft2 Thickness of painting = 3.40 mm   Volume of…

Q: 2. You purchase a rectangular piece of metal that has  dimensions 5.0 X 15.0 X 30.0 mm and mass…

A: A numerical problem based on measurement, which is to be accomplished.

Q: A sample of butane gas was completely combusted in oxygen to produce energy. If 1.35 x 1024…

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Q: In a standardization experiment, a student titrates a 0.250g sample of pure Na,CO, with her HCI…

A: Given Mass of pure Na2CO3 sample = 0.250 g Volume of HCl used to neutralize 0.250 g of Na2CO3 sample…

Q: A chardonnay wine is 13.5 percent by mass alcohol. If we consume 24 fluid oz of wine, and the…

A: Percent by mass alcohol = 13.5 % Volume of wine = 24 oz 1 oz = 29.57 mL 24 oz = 709.76 mL or 0.70976…

Q: A chemist prepares a solution of nickel(II) chloride (NiCl₂) by measuring out 2.1 × 10² μmol of…

A: Concentration - It is the amount of solute present in per unit volume of solution  Concentration =…

Q: CHEMISTRY Calculating Density Density is the compactness of matter. Density describes the quantity…

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Q: The speed of light is 2.998 × 108 m/s. How long does it take light to travel 100. cm? Set the math…

A: The speed of light= 2.998 × 108 m/s distance travelled= 100. cmTime =?

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.