Which statement correctly describes a physical change?
a) involves breaking and creatin...
Chemistry, 29.12.2019 08:31, yazmine912
Which statement correctly describes a physical change?
a) involves breaking and creating chemical bonds but not changing a phase
b) may involve a change in phase but does not involve a change in the molecular structure
c) may involve converting two or more substances into new substances
d) involves changes at the molecular level
e) involves energy transfer and change in color
Answers: 2
Chemistry, 22.06.2019 06:00, VamPL
Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3coβ2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4β6co2+2mno2+2kcl +4h2o enter the elemental symbol. view available hint(s) is reduced
Answers: 1
Chemistry, 22.06.2019 23:00, ceejay8005
The data below were determined for the reaction shown below. s2o82β + 3i β (aq) β 2so42β + i3β expt. # [s2o82β] (m) [i β] (m) initial rate 1 0.038 0.060 1.4 Γ 10 β 5 m/s 2 0.076 0.060 2.8 Γ 10 β 5 m/s 3 0.076 0.030 1.4 Γ 10 β 5 m/s the rate law for this reaction must be:
Answers: 1
Chemistry, 23.06.2019 04:00, hailey200127
What is the volume of 2.5 moles of nitrogen gas (n2)at standard temperature and pressure (stp)?
Answers: 1
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