2 b For each question, apporreasonable work according to your discretiolare heeded to release 49 000 | of heat? (3 marks- 2 marks for work, 1 mark foranswer)) If burning 100g.of sugar (glucose) releases 1560 kl of heat, how manymail4x41945- 16736JToog G Releases = 1560 kj147BLJ heat Releie Ig sugar49006 -2.92gT67302) A light-year is a non-SI unit with a length of the distance that light travels in one yeara vacuum. The speed of light is 300 000 000 meters per second. (5 marks total)a) What is the distance of a light-year in metres? (3 marks)以Booddobo0distance < spees xtrmeTHac)se3x10*m/s x 3.2X107s =9.6x lo'mA b) What is the distance of a light-year in kilometres? (2 marks 1 mark for work, 1mark for correct answer)According to our best astronomy, the observable universe is about 91 billion light yearsin diameter. What is the diameter of the observable universe in gigametres? (3 marks-2 marks for work, 1 mark for correct answer)

We have to find out how many kilometer are in 1 light year

Answered: 2 b | bartleby

Science

Chemistry

2 b

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

8. L0s t213.15= 318.18K 2. A woman is 5 ft 5 in tall and weighs 140 lb. Express these values in the SI system (m, kg)
An analyst conducted suction filtration for a certain 3.0 gram of solid. After filtration, the weight of the collected powder was 2.8 grams. Calculate the recovery efficiency of the sample.
2. Quantitative analysis student Analytical analyzed an ore sample for its lead content and obtained a mean of 4.75% Pb for five measurements. If the certified true value is 4.50%, what is the (a) percent error? (b) percent accuracy?
Cl₂(g) + 2e Cr₂0 (aq) + 14 H(aq) + 6€¯ O2(g) +4 H(aq) + 4e¯ MnO2(s) + 4H(aq) + 2e¯ 10, (aq) +6H(aq) +5e¯ VO₂+ (aq) + 2H(aq) + e¯ Br₂(1) + 2e NO, (aq) +4 H(aq) + 3e¯ ClO2(g) + e 2 Cl(aq) Ag* (aq) + e Fe3+(aq) + e 2 Cr³+ (aq) + 7 H₂O(1) 1.36 1.33 2 H₂O(1) 1.23 Mn2+(aq) + 2 H₂O(1) 1.21 12(aq) + 3H2O(l) 1.20 VO²+(aq) + H₂O(1) 1.00 2 Br (aq) 1.09 NO(s) + 2 H2O(1) 0.96 CIO₂ (aq) 0.95 Ag(s) 0.80 Fe2+(aq) 0.77 What is the E° cell for the reaction Cr₂O²² + CIO₂ → Cr³+ + CIO₂? a. 2.28 V. b. -2.28 V. c. 0.38 V. d. -0.38 V.
1- 55 + 6KNO3 + 2CACO33K2SO4 + 2CaSO4 + CO2 + 3N2 In the given chemical reaction, the oxidizing agent is .
Express (5.25*10^4) megameters to meters
a W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn 30.9 183.9 186.2 190.2 190.2 195.1 197.0 200.5 204.4 207.2 209.0 (210) (210) (222) 05 106 107 108 109 110 111 112 114 116 118 Ob Sg Bh Hs Mt Ds Uuu Uub 260) (263) (262) (265) (266) (271) (272) (277) (296) (298) (7) 60 61 62 63 64 65 66 67 68 69 70 71 Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu 44.2 (147) 150.4 152.0 157.3 158.9 162.5 164.9 92 93 94 95 96 97 98 99 100 101 167.3 168.9 173.0 175.0 102 103 U Np Pu Am Cm Bk Cf F Es Fm Md No Lr 238) (237) (242) (243) (247) (247) (249) (254) (253) (256) (254) (257) sogna pee ou cacau pe busca o cus £(H၁)၁၀- шогеш аз моц моцѕ 01 смоле рәліп əsənу sәне иo pǝseq pod еш әсхә пол t be a part by a padd a test so be a
1. Certified Reference Material (CRM), GSS-5, is certified to contain 40.67 ± 3.33 mg/kg of Ni in soil. An analysis of the CRM gives values of 40.39, 41.98, 43.64, 44.38, and 45.96 mg/kg. Determine the tcalc. value and determine if your results differ from the expected results at the 90 % confidence level?
for forensic chemistry : If a vehicle with four wheels is traveling in a linear path through soft dirt, how many and which tires would you expect to leave tire track impressions?
Br DH NaCN
Refer to the pictures:
The world population is estimated to be 7.4 x 109. Nauru is the smallest island nation and comprises 1.5 x 10-4% of the world population. If the percentage of left-handed people is approximately 12%, estimate the number of left-handers on the island of Nauru.