Chemistry, 14.04.2021 17:30 Hockeypro1127
Which method of measurement can assess the speed of an electric motor?
A. number of rotations completed by the coil in a minute
B. direction of the magnetic field lines around the coil
C. brightness of the light bulb attached to the same circuit
D. number of paper clips that attach to the battery
Answers: 3
Chemistry, 22.06.2019 09:40
In the lab, ammonia was mixed with water to form ammonium hydroxide. what is/are the reactant(s)? o water and ammonia o ammonia o ammonium hydroxide need
Answers: 2
Chemistry, 22.06.2019 23:00
The data below were determined for the reaction shown below. s2o82ā + 3i ā (aq) ā 2so42ā + i3ā expt. # [s2o82ā] (m) [i ā] (m) initial rate 1 0.038 0.060 1.4 Ć 10 ā 5 m/s 2 0.076 0.060 2.8 Ć 10 ā 5 m/s 3 0.076 0.030 1.4 Ć 10 ā 5 m/s the rate law for this reaction must be:
Answers: 1
Chemistry, 23.06.2019 06:40
The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?
Answers: 1
Which method of measurement can assess the speed of an electric motor?
A. number of rotations compl...
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