Gloria’s science teacher has given her a sample of an unknown metal along with this table. Gloria finds that her sample has a mass of 53.5 grams and a volume of 2.5 cubic centimeters. The sample can be identified as copper. iron. lead. platinum.

Answers

Answer 1

Answer: The answer is: [D]: platinum .
__________________________________________________________
Explanation: Given the information provided, we need to find the "density" of the unknown metal; in: "mass per UNIT volume". Then we need to look up the "density" values of EACH of the 4 answer choices (or at least until we get the corresponding density). To be thorough, we still should look up the density of EACH of the metals listed in the answer choices given. We look up these "densities" online, or in a specialty reference guide in university library, for instance.
__________________________________
First, let us calculate the density of the unknown volume:
______________________________________________
Density, "D", = m / V ; in which: D = density; m = mass; V = volume;
___________________________
We are given: mass, "m" = 53.5 g ; and:
Volume, "V" = 2.5 cubic centimeters = 2.5 cm³
_______________________________________________
D = 53.5 g / 2.5 cm³ = (53.5 / 2.5) g / cm³ = 21.4 cm³ ;
→ Round to "2 significant figures";
= 21 g/cm³
_______________________________________________________
We are given 4 (four) answer choices). Let us list EACH of the 4 (four) answer choices and their densities (researched).
____________________
Choice "A" : copper; (Cu) ; density = 8.96 g / cm³ ;
______________________________________
Choice "B" : iron ; (Fe) ; density = 7.874 g / cm³ ;
______________________________________
Choice "C": lead; (Pb) ; density = 11.34 g / cm³ ;
______________________________________
Choice "D": platinum; density = 21.45 g / cm³ ;
________________________________________
Clearly, Answer choice: [D]: "platinum" is the correct answer; with a density of "21.45 g / cm³ " ;
____________________________________________________
Since this value is the closest to our calculated value of
" 21 g/ cm³ "; or even "21.4 g/ cm³ " [our value before rounding down to 2 (two) significant figures].

The densities of the metals in all the other answer choices given are far from this value.
________________________________________________
I hope this explanation has been of some help.

Answer 2

Answer:

Answer:

Yeah, its platnium.

Explanation:

Related Questions

Scientists discovered that small-footed and large-footed lizards shared a common ancestor. Today they are no longer able to interbreed together. What is this an example of? A. speciation B. succession C. spontaneous generation D. natural selection
How did Christianity affect the Kingdom of Aksum?It gave it a more traditionally African culture.It decreased trade.O It made it different from other North African cultures.o It made it vulnerable to Muslim conquests.
How many hawksbill turtles are left in the world?
The members of these kindoms all have cell walls. Which kingdoms are they?
Why do you think doctors try to use autografts rather than allografts on burn patients?

Why are petri dishes being used?

Answers

Answer:

Petri dishes are widely used in biology to cultivate microorganisms such as bacteria, yeasts, and molds.

Explanation:

It is most suited for organisms that thrive on a solid or semisolid surface.

Daren has sickle-cell disease. Because of the disease, some of Daren's blood cells are long and thin instead of being disk-shaped. Daren's father also suffers from sickle-cell disease, but his mother and two sisters do not. This is an example how A. a person can choose which genes he or she will inherit. B. cells can be influenced by genetic factors. C. cells always repair damaged genes immediately. D. a person cannot survive if even one cell becomes damaged.

Answers

Answer: B cells can be influenced by genetic factors

Explanation: Daren has sickle cell disease. Sickle cell disorder is a kind of disease that affects the hemoglobin in the red blood cells. Hemoglobin, is a molecule in red blood cells that delivers oxygen to cells throughout the body. People with Sickle cell disorder have hemoglobin molecules called hemoglobin S, which distort the shape of the red blood cells. A normal red blood cell has a disc shape but people with sickle cell like Daren have their red blood cells and distorted into a sickle, or crescent, shape

What is an extremophile? Give an example

Answers

Its a microorganism a little tiny animal that lives in very extreme temperatures. Like antarctic krill.

a microorganism, especially an archaean, that lives in conditions of extreme temperature, acidity, alkalinity, or chemical concentration. hope this helps as an answer :)

In pea plants, purple flowers are dominant over white flowers. The phenotype ratio of purple to white flowers in a population of five plants is 4:1. How many plants have white flowers?1
2
4
5
----------

In some lizard species, a short tail is recessive and a long tail is dominant. According to the principle of dominance:
a lizard with a TT genotype will have a short tail
a lizard with a tt genotype will have a long tail
a lizard with a Tt genotype will have a short tail
a lizard with a tt genotype will have a short tail

Answers

1. 1
Since the ratio is purple flowers to white flowers, and the ratio is 4:1 out of 5 plants, there is 1 white flower. Remember that, in a ratio, the first number is the first one mentioned, and the second number is the second one mentioned.

2. A lizard with a tt genotype with have a short tail
Since the short tail is recessive, it can be represented with a lowercase letter (t), and since the long tail is dominant, it can be represented with a capital letter (T). Because the long tail gene is dominant, if even one capital T is present in a genotype, the lizard will have a long tail. You can label the different kinds of genotypes if it helps.

TT - long tail, since both genes are for a long tail
Tt - long tail, since one gene is for a long tail, and the long tail is dominant
tt - short tail, since both genes are for a short tail

Hope this helps!

Who is Charles hulfnagel

Answers

He was a surgeon back in the 1950s

A pack of wolves kill and eat a deer. What kind of interaction takes place between the wolves and the deer?

Answers

This is predation. A predator-prey relationship. The predator catches the prey, kills and eats it for food.

Answer:

predator/pray

Explanation:

i did it on study island

Other Questions

The four types of nitrogen bases of DNA nucleotides are 1________,2______, guanine, and cytosine.1.chlorineadenineerminetidine2.fluorinepurinethymine thalamine

Who won the battle of somme? explain

What is the meaning of speed?

Who wrote systemnaturae