You are tasked with identifying the four rock samples seen here. You and your lab partner disagree about the rocks that are labeled Q and R. You are sure the rocks are marble and limestone. Your partner disagrees and thinks that they are igneous rocks
and not sedimentary rocks.
There is one key mineral you could identify to support your rock identifications. What is the test and why would you use it?
es)
A)
B)
Limestone and marble are both sedimentary rocks. You could use a hand
lens and check to see if there are layers.
Limestone and marble are always light in color. You could use the streak
test and scratch the rocks over the streak plate.
Limestone and marble contain calcite. You could use the hydrochloric acid
test to see if there is a reaction for that mineral
Limestone and marble contain calcite. You could use Moh's scale of
hardness to see if the rocks contained that mineral by trying to scratch
them with a penny.
o
D)

just here for the other one bc they put up with u

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.