PHY 251 TEST 1 FA23 (1)

34. The mass of a sample of nickel is 11.74 g.  It contains   A. 4.287 x 1022 atoms   B. 1.205 x 1023 atoms   C. 1.174 x 1023 atoms   D. 1.869 x 1023 atoms   E. 3.256 x 1023 atoms

Problem 14. Must use formula from formula sheet. I’m not sure where to start

er B. Graphing Exercises: Construct a graph for each of the following sets of data. Using the graphs that you make, answer the questions below for each graph. 1. Students measured the mass and the volume of various samples of a metal and the results below were obtained. Mass (grams) Volume (cubic centimeters) or cm3 ()1.5 12.3 28.5 3.5 frie 42.0 5.0 59.5 7.3 (S) 78.2 9.6 12.0 99.0 What basis observation can be made concerning the mass-volume relationship? a. Page 9 of 12 Lab 2

For number 3 what are the experimental Cp, Literature Cp 1 and 2 and the percent yi

1 The accepted density of water at room temperature is approximately 1.0 g/mL. Melody and Margaret were told by their professor to measure 7.0 mL of water, which should theoretically weigh 7.0 grams. They first measured the volume of water in a graduated cylinder to be 7.0 mL and then the students weighed the water and they obtained a mass of 6.85 grams. First, calculate the density of their sample of water and then calculate their percent error for density. 2. A science teacher tells her class that their final project requires the students to measure a specific variable and determine the velocity of a car with no more than 2.5% error. Jennifer and Johnny work hard and decide the velocity of the car is 34.87 meters/second. The teacher informs them that the actual velocity is 34.15 meters/second. Will Jennifer and Johnny pass their final project.

Among the following the largest mass is O a. 75000 mg O b. 0.075 kg O . 7500 g O d. 750 ug

5. In a laboratory exercise on the use of an Analytical Balance, a group of students weighed one caplet for 3 times. The readings are 578.4 mg, 591.1 mg and 582.8 mg. The true weight of the caplet is 0.6140 g. What is the percentage error of the measurements?   a A. 4.874%   b B. 4.847%   c C. 4.870%

C. d. 554 mk/s 2.554 mg/mL K/s g/L µK/ms µg/mL

b. Determine values of L, ML, S, and Ms for a doublet P term.

0.3 Suppose the average daily metabolic rate for certain types of animals can be expressed as a function of mass by r= 120.9m where m is the mass of the animal (in kilograms) and r is the metabolic rate (in kcal per day). " dm dr dt a. If the mass of an animal is changing at a rate of find dt b. Determine for a 100-kg animal that is gaining mass at a rate of 3 kg per day. dr dt ... dr dt " dm a. If the mass of an animal is changing at a rate of dt " find dr 기 dt

Follow Significant Figures rules and Scientific Notation for all steps of the solution just for Question 1. Question 1 Gold, which has a mass density of 19.32 g/cm³, is the most ductile metal and can be pressed into a thin leaf. If a sample of gold, with a mass of 27.63 g, is pressed into a leaf of 1.000 μm thickness, what is the area of one side of the leaf? Note: Volume of the leaf is area of one side times the thickness.

A new drug is metabolized by healthy aduits at a rate of 25% each hour. After 2.5 hours, a patient had 100 mg of the drug in their body. How much of the drug were they given 2.5 hours ago? You can use the formula: R=Ix0.75 R= amount remaining 1- initial amount t- time Round your answer to one significant digit. Do not include the unit milligrams.

Number 1 answer should be 144 J. Number 5 answer should be 988 J. You must answer no. 1, 2, 4, 5 and 6 Thank you in advance. I hope you can answer those questions.

A cylindrical storage tank has a radius of 1.06 m. When filled to a height of 3.67 m, it holds 12600 kg of a liquid industrial solvent. What is the density of the solvent? Number i Units

1A. A cylindrical tube 9.5 cm high and 0.85 cm in diameter is used to collect blood samples. How many cubic decimeters (dm³) of blood can it hold? The volume of a cylinder is given by ar?h,r = radius and h = length. 1B. A cylindrical rod formed from silicon is 16.8 cm long and has a mass of 2.17 kg. The density of silicon is 2.33g/mL. What is the diameter of the cylinder? Hint: the volume of a cylinder is given by ar?h, r = radius and h = length.

A. First, what is the mass of a 26L of water? B. What is the diameter of an aluminum sphere with the mass you found in Part A. Answer in centimeters.

Ipecac syrup contains the equivalent of 32 grains of ipecac in each fluidounce of the syrup. How many milligrams of Ipecac is contained in 30 mL of the syrup? O a. 2080 mg O b.208 mg OC 2.08 mg O d.0.208 mg O e. 20800 mg

The average mass of a human liver is 1.5 KG.  convert this quantity to. A. Grams B. Ounces.

Problem 19. Must use formula from formula sheet. Not sure which one or where to start.

What kind of error does this pose and why? "A volumetric cylinder that is used to measure the volume of the liquid has a bump on the cylinder." a. Random error b. Minimal error c. Instrumental error d. Systematic error

HELP ASAP!! THANK YOU. How many bottles of a 1.5 liters coke will you need to fill an entire 5.0 gallons empty water jug? a. 10 b. 12.6 c. 13 d. 12

A batch of concrete consisted of 200lb fine aggregate, 350 lbs course aggregate, 94 lb cement and 5 gallon of water. Assuming SG of sand and gravel is 2.65 and that of cement is 3.10.   a. What is the total volume? b. How much by weight of cement is required to produce one cubic yard?

Q 2: a- If you had 0.2 kg of helium, how many helium atoms would you have? b- If you had 10 dozen helium atoms, what would be their mass? c- What is the mass of one helium atom? d- What is the mass of 2.0 moles of helium atoms?

An iron casting containing a number of cavities weighs 5.75E+3 N in air and 4.01E+3N in water. What is the total volume of all the cavities in the casting? The density of iron (that is, a sample with no cavities) is 7.87 g/cm3. Number i Units

What kind of error does this pose and why? "A volumetric cylinder that is used to measure the volume of the liquid has a bump on the cylinder." a. Random error b. Minimal error c. Instrumental error

One quart of a mixture contains equal parts of alcohol (sp.gr. 0.812) and glycerin (sp.gr. 1.25). what is the weight of glycerin in grams? O a. 384.08 g O b.501.25 g O. 075.33 g O d. 768.15 g O e. 1182.5 g

Diluting a solution A tank is filled with 100 L of a 40% alcoholsolution (by volume). You repeatedly perform the following operation:Remove 2 L of the solution from the tank and replace themwith 2 L of 10% alcohol solution.a. Let Cn be the concentration of the solution in the tank after thenth replacement, where C0 = 40%. Write the first five termsof the sequence {Cn}.b. After how many replacements does the alcohol concentrationreach 15%?c. Determine the limiting (steady-state) concentration of the solutionthat is approached after many replacements.

2. Given a solid rock found in an archeological dig. The volume of the rock is measured and found to be 100 cm^3. The rock is weighed and found to have a mass of 1000 grams. What is the density of the rock in units of grams/cm^3?   a. 10.0   b. 1000

The standard kilogram is a platinum iridium cylinder 39.0mm in height and 39.0mm in diameter what is the density of the material