Chemistry, 10.03.2020 09:05 antonypaz6583
You have a series of four chemical reactions (1→2→3→4).
How do you calculate the ΔH2 if you know the other ΔH values?
ΔH2=ΔH1+ΔH3 + ΔH4
ΔH2=(ΔH1)(ΔH3)/ (ΔH4)
ΔH2=ΔH4−(ΔH1 + ΔH3)
ΔH2=ΔH1+ΔH3 − ΔH4
Answers: 1
Chemistry, 22.06.2019 11:40
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
Chemistry, 22.06.2019 17:40
Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.
Answers: 1
Chemistry, 22.06.2019 21:30
An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.
Answers: 1
Chemistry, 23.06.2019 05:30
For the reaction i2(g)+br2(g)←−→2ibr(g), kc=280 at 150 ∘c. suppose that 0.450 mol ibr in a 2.00-l flask is allowed to reach equilibrium at 150 ∘c. what is the equilibrium concentration of 2ibr, i2, br2
Answers: 1
You have a series of four chemical reactions (1→2→3→4).
How do you calculate the ΔH2 if you k...
How do you calculate the ΔH2 if you k...
Mathematics, 18.07.2019 09:00
Mathematics, 18.07.2019 09:00
Mathematics, 18.07.2019 09:00
English, 18.07.2019 09:00
Mathematics, 18.07.2019 09:00
Mathematics, 18.07.2019 09:00
Mathematics, 18.07.2019 09:00
History, 18.07.2019 09:00
Advanced Placement (AP), 18.07.2019 09:00