Question

students were investigating mixtures. during the investigation, they were asked to mix four different types of substances.
result 1: after mixing, salt was not able to be seen in the water.
result 2: after mixing, food coloring was found uniformly throughout the liquid.
result 3: after mixing, chocolate chips could be seen in the batter.
result 4: after mixing, oil and water remained separated.
which experiment result would show that a heterogeneous mixture was created?
a results 1 and 2
b results 2 and 3
c results 1 and 3
d results 3 and 4
a student tested the properties of an unknown element. the results of the test are shown in the table below.
properties results
conductivity yes no
shiny luster √
magnetic √
based on the information, which element did the student likely test?
a chlorine - cl
b iron - fe
c neon - ne
d hydrogen - h
which of the following tables correctly identifies the elements and compounds?
a
substance classification
zn element
nacl element
c6h12o6 compound
c
substance classification
zn element
nacl compound

Explanation:

Q8

A heterogeneous mixture has visibly different parts. In Result 3, chocolate - chips can be seen in the batter and in Result 4, oil and water remain separated. These show non - uniform mixtures. Results 1 and 2 show uniform mixtures (salt dissolving in water and food coloring uniformly distributed).

Chlorine, neon, and hydrogen are non - metals. Non - metals generally do not have conductivity, shiny luster, and are not magnetic. Iron is a metal which has conductivity, a shiny luster, and can be magnetic.

An element is a pure substance made of only one type of atom. A compound is made of two or more different types of atoms chemically combined. Zinc (Zn) is an element. Sodium chloride (NaCl) is a compound made of sodium and chlorine atoms, and glucose ($C_6H_{12}O_6$) is a compound made of carbon, hydrogen, and oxygen atoms.

Answer:

D. Results 3 and 4

Q9