Dominic made the table below to organize his notes about mixtures. A 1-column table. The first column labeled properties of mixtures has entries that have no set composition, must have more than one state of matter, must have more than one substance. What mistake did Dominic make? The title should read “Properties of Solutions” because some mixtures do not have all of the properties listed. There is a definite recipe to make each mixture, so the composition of a mixture is set. Although it is possible to have more than one state, it is also possible to have only one state. A single substance can be used to make a mixture if the substance is composed of more than one element.

Although it is possible to have more than one state, it is also possible to have only one state.

Explanation:

The mistake Dominic made was stating that "although it is possible to have more than one state, it is also possible to have only one state."

Mixtures are impure substances with the following properties:

They have an indefinite composition

Their constituents retains their identities.

Constituents react differently to changed conditions.

They can easily be separated into constituents by physical methods.

There are two types of mixtures based on the number of phases coexisting:

Homogeneous mixtures have their constituents existing in just one phase.

Heterogeneous mixtures exists in at least two different phases.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

i think it's letter a.