Chemistry, 15.11.2019 08:31 kevinvalencia01
Which statement describes how chemical formula such as h20 represent compounds check all that apply
they show the types of molecules that make up an atom
they show the elements of make up a compound
they show the 3 dimensional shape of a molecule
they show the types of atoms that make up a molecule
they should the number of each type of atom in a molecule
Answers: 3
Chemistry, 22.06.2019 03:30
In saturated organic compounds, all the bonds between carbon atoms are called?
Answers: 1
Chemistry, 22.06.2019 08:00
Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next
Answers: 2
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 21:50
What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car
Answers: 2
Which statement describes how chemical formula such as h20 represent compounds check all that apply<...
Mathematics, 12.11.2020 07:00
Chemistry, 12.11.2020 07:00
Mathematics, 12.11.2020 07:00
Mathematics, 12.11.2020 07:00
Physics, 12.11.2020 07:00
Mathematics, 12.11.2020 07:00
Biology, 12.11.2020 07:00
Social Studies, 12.11.2020 07:00
History, 12.11.2020 07:00
English, 12.11.2020 07:00
History, 12.11.2020 07:00
Biology, 12.11.2020 07:00
Mathematics, 12.11.2020 07:00