What is the oxidation number of manganese (Mn) in potassium permanganate (KMnO4) ?

+3

+5

+6

+7

Why do we increase the surface area of a solid when dissolving? a) to decrease the rate of dissolution b) to decrease the temperature c) to increase the rate of dissolution d) to decrease the need for agitation

What is the mass of an atom that has 10 protons, 13 neutrons, and 10 electrons?

The mass of the electron is about equal to the neutron. almost the same as the proton. very small compared to the proton. very large compared to the neutron. light 2:21 Tools

A mixture of 0.220 moles co, 0.350 moles n2 and 0.640 moles ne has a total pressure of 2.95 atm. what is the pressure of co? a. 1.86 atm b. 0.649 atm c. 0.536 atm d. 1.54 atm e. 0.955 atm

How is electron movement related to covalent bonding in ammonia, NH3? A) Electrostatic sharing in a sea of electrons around the atoms allows bonds to form. B) The atomic orbitals overlap and electrons are shared between the atoms forming bonds.

What is an ion (1 mark) what is the charge on a chloride ion (1 mark) what is an ionic bond (1 mark)

Why do northern lights appear in different colors? Because charged particles of solar wind ignite different gases in Earth's atmosphere Because electrons and protons of solar wind ignite the plasma present in the corona Because electrons and protons

Which organ system consists of the following levels of organization? kidney cells - - > kidney tissues - - > kidney A. excretory B. circulatory C. respiratory D. integumentary

Identify the product of radioactive decay and classify the given nuclear reactions accordingly.

If a 860. ml of linseed oil has a mass of 680 g, what is the density of the oil