general chemistry , please solve question 3 and 4 1. A car is moving with a velocity of 65 km/hr. How many miles would it travel in 35 sec. (1 mile = 1.61 km)(c) 2.5(a) 0.39(b) 1.1(d) 0.18(e) 0.562. Naturally occurring rubidium consists of two isotopes; 84.912 amu and 86.901 amu. What is the average atomicweight (amu) of rubidium if the fractional abundance of the heavier isotope is 0.2800?(a) 85.907(b) 85.469(c) 86.021(d) 85.005(e) 86.1533. If a sample of N;Os decomposes to produce 1.381 g O2, how many grams of NO2 are formed? (Molar mass of NO2 =2N;Oso > 4NO:(g) + O2(g)(c) 5.52046.01 g/mol, Oz= 32.00 g/mol).(b) 3.967(a)4.625(d) 7.942(e) 1.4384. What is the net ionic equation for the reaction that occurs when nitric acid is added to copper(II) hydroxide?2HNO,(aq) +Cu(OH):(s) → Cu(NO3):(aq) + 2H;0()(a) H"(aq) + OH (aq) HO()(b) 2H (aq)+ Cu(OH):(s) Cu (aq) + 2H:0()(c) 2HNO:(aq) +Cu(OH)2(s) Cu(NO:)(aq) + 2H;0()(d) 2H"(aq) +2N0, (aq) + Cu"(aq)+20H(aq)Cu(NO,)2(aq)+ 2H;0(1)(e) 2H (aq) + 2NO, (aq)+ Cu (aq) + 20H(aq) Cu"(aq) + 2NO, (aq) + 2H;0(1)5. If 0.0870 g of a gas occupies 33.6 ml at STP, calculate the molecular mass of the gas(R= 0.0821 L.atm/K.mol, PV = nRT).(a) 29.0(b) 41.2(c) 58.0(d) 66.4(e) 87.06. Calculate the standard heat of formation, 4H, for FeS2(s), given the following information:2FES2(s) + 50:(g)2FEO(s) +4SO2(g)AH°n = -1370 kJAH for FeO(s) = -268 kJ/molAH for SO(g) = -297 kJ/mol;(a) -177 kJ(b) -1550 kJ(c) -774 kJ(d) -686 kJ(e) +808 kJ7. Calculate the change in the internal energy (4U) for the reaction of Ni with CO, if 158 kJ heat was evolved and 8.68kJ work was done on the system.(a) -158 kJNi(s) + 4 CO (g) Ni(CO)«(g)(c) 167 kJ(b) 149 kJ(d) -167 kJ(e) -149 kJ8. State which of the following sets of quantum numbers would be impossible:(a) n =1, 1=0, m = 0, m,= +1/2(d) n=2, 1=1, m = 0, m, = -1/2(c) n=3,1=2, m = +2, m, = -1/2(b) n =2, 1= 2, m = +2, m=+1/2(e) n=2, 1=1, m =-1, m, = -1/29. Which element has the highest first ionization energy?(a) Be(b) В(c) C(d) N(e) O10. The atom having the valence-shell configuration 4s 4p' would be in:(a) Group 6A and Period 5(d) Group 7A and Period 4(b) Group 4B and Period 4(e) Group 7B and Period 4(c) Group 6B and Period 711. Which of the following electron configurations is wrong:(a) Mg (Z= 12): Is'2s 2p 3s?(c) Cu (Z 29): 1s²2s 2p 3s²3p 3d104s'(e) S (Z = 16): 1s'2s²2p°3s?3p*(b) Br (Z= 35): [Ar] 3d04s24p(d) V (Z= 23): [Ar] 3d1

Since you have asked multiple question, we will solve the first question for you as per our…

3. If a sample of N;Os decomposes to produce 1.381 g O2, how many grams of NO: are formed? (Molar mass of NO 46.01 g/mol, O2= 32.00 g/mol). (a) 2N;Oso → 4NO:(g) + O(g) (c) 5.520 4.625 (b) 3.967 (d) 7.942 (e) 1.438

3. If a sample of N;Os decomposes to produce 1.381 g O2, how many grams of NO: are formed? (Molar mass of NO 46.01 g/mol, O2= 32.00 g/mol). (a) 2N;Oso → 4NO:(g) + O(g) (c) 5.520 4.625 (b) 3.967 (d) 7.942 (e) 1.438

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

1. Several students performed this experiment without paying adequate attention to the details of the procedure. Briefly explain what effect each of the following procedural hanges would have on the size of the volume- to- temperature ratio calculated by the students. (a) One student failed to replenish the boiling water in the boiling- water bath as the flask was being heated. At the end of the 6 min of heating, the boiling water in the bath was only in contact with the lower portion of the flask. (b) Following the proper heating of the flask in the boiling water, a student removed the flask from the boiling- water bath but only partially immersed the flask in the ice-water bath during the cooling period. (c) A student neglected to close the pinch clamp before removing the flask from the boiling water bath and immersing it in the ice-water bath. (d) One student neglected to measure the volume of the flask before leaving the laboratory. Because the procedure called for a 125-mL…
Is distillation a good method for separating a mixture of water and hexane? Why or why not?
When calcium oxalate monohydrate is heated, anhydrous calcium oxalate and water are formed. Further decomposition of the calcium oxalate produces calcium carbonate and carbon monoxide. If the heating temperature is increased to well above 600 degrees celsius, calcium carbonate will decompose to calcium oxide and carbon dioxide. Write three reactions to depict the decomposition processess described here.
please put the right number of significant figures
If a water sample has 0.07 mol of calcium ions in 15 L solution, what is the water hardness level in mg/L? Pay attention to the unit. Hint: For the calcium mass , convert mol to g to mg. (1 mol calcium ion= 40.08 g/mol and 1 g = 1000 mg) Round and report your answer to an integer without decimal place. Report numeric value only, no unit. • Water hardness levels according to EPA Soft: 0-60 milligrams per liter (mg/L) as calcium carbonate Moderately hard: 61-120 mg/L as calcium carbonate • Hard: 121-180 mg/L as calcium carbonate Very hard: more than 180 mg/L as calcium carbonate
To what volume (in mL) should 0.67 mL of an 5.21 M acetic acid solution be diluted in order to obtain a final solution that is 1.77 M? Calculate 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 or scientific notation as accepted by blackboard e.g. 0.001 or 1E-3, not 1 x 10^-3
24 25 26 A chemistry student weighs out 0.0202 g of acrylic acid (HCH,CHCO,) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1800M NAOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits. mL x10 Continue Submit Assignment 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center | Accessibility C 80 000 000 F1 F2 DII DD F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 @ 2$4 % &
com/alekscgi/x/Isl.exe/1o_u-IgNslkr/J8P3JH-IBEWe Maps O MEASUREMENT Lindsay Adding or subtracting and multiplying or dividing measurements chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. The concentration of a solution equals the mass what's dissolved divided by the total volume of the solution. re's how the student prepared the solution: • The label on the graduated cylinder says: empty weight: 6.050 g dlo - She put some solid sodium hydroxide into the graduated cylinder and weighed it. With the sodium hydroxide added, the cylinder weighed 96.4 g. - She added water to the graduated cylinder and dissolved the sodium hydroxide completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 151.66 mL. Ar at concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. -1 gmL
A. Match the WORDS on the LEFT with the correct definitions on the RIGHT 1. Dilution is a measure of the amount of solute that is dissolved in a given quantity of solvent. 2. Pure Substances is one that contains a small amount of solute. 3. Unsaturated solution contains a large amount of solute. 4. Heterogeneous is the amount of solute per liters of solution. 5. Concentration is the process of reducing the concentration of
The maximum level of lead allowed in drinking water is 15 mg/kg. What is this concentration in units of parts per million?
Differentiate volumetric solution and test solution