Iron has a known density of 7.87 g/cm3. What would be the mass of a 2.5
cm3 piece of iron?

Answers

Answer 1
if i am not mistaken ,

density = mass / volume

density = 7.87 g/cm3
volume = 2.5 cm3

thus ,
mass = density x volume

7.87 g/cm3 x 2.5 cm3 = 19.675 g

Related Questions

HELPPPP ASAPPPPPP WILL MARK BRAINLIST

brainstorm 5 ways you can settle an argument more effectively then restoring to a dual

Answers

here it wasnt letting my upload my answer so i screenshotted

The elements mercury and bromine are both liquids at room temperature, but mercury is considered a metal, and bromine is considered a non-metal. How can that be? Explain using properties you know of.

Answers

Answer:

At room temperature, mercury and bromine are of fluid consistency, it is because their melting or melting temperature is very low, so low that it reaches room temperature.

Compared to mercury and other metals, the more traditional metals have much higher melting temperatures.

On the other hand, bromine is not a metal, since it does not have the ability to oxidize with the presence of oxygen and also does not give up electrons.

Explanation:

Mercury in the periodic table is Hg, and bromine is Br

I GIVE BRAINLIEST IF YOU ANSWER!

Which of these is a characteristic of warm air? (5 points)

a It transfers energy through radiation.

b Its molecules are far apart.

c It sinks due to convection.

d It cools the land below i

Answers

Answer:

B.

Explanation:

The air molecules of warm air has higher energy. It causes them to move away from each other

Please help help ASAP Please help It’s do in a 1 hour What conclusion can you draw about the relationship between physical activity and a
person's pulse rate?

Answers

Answer:

During exercise, heart rate can rise dramatically, from a resting rate of 60–80 beats per minute to a maximum rate of about 200 for a young adult. While you are running, blood flow is diverted toward tissues that need it most. For example, muscles in the arteries in your legs relax to allow more blood flow.

Explanation:

Answer:

the more physical activity you do the higher your heart rate rises

Explanation:

me every time I walk more then two steps honestly

What causes an earthquake to happen?
A. O Rocks deform slowly as a result of physical stress.
B. O Rocks along a fault move suddenly and release energy.
C. Large amounts of rock suddenly shift downward when large holes form
underground
D. O Energy is transferred to rock layers from convection currents in the oceans
and the atmosphere.

Answers

The answer is is is is is d

GIVING BRAINIEST FIVE STARS AND HEART!
Please define the following term in your own words!


law of conservation of matter

Answers

Answer:

Matter cannot be created destroyed

Explanation

Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.

Question 16 (6 points)
Match the following elements with the correct answers.
Column A
Column B
a Francium
1.
Which element has the largest electronegativity?
2
Which element has the biggest atomic radius?
b. Nonmetals
3.
C Fluorine
4
From which types of elements is it more difficult
to pull away a valence electron?
Which type of elements has lower ionization
energy?
What element has an oxidation number of +3?
d. Helium
5.
e. Metals
6.
What element has 2 valence electrons?
f. Aluminum

Answers

Answer:

1.) Fluorine

2.) Francium

3.) Nonmetals

4.) Metals

5.) Aluminum

6.) Helium

Explanation:

Where is the Oort cloud located?
in the innermost region of the solar system, closest to the Sun
in the outermost region of the solar system, beyond Neptune
in the region between the Kuiper belt and the scattered disk
in the region beyond Neptune, but closer to the Sun than the Kuiper belt

Answers

Answer:

Option B - in the outermost region of the solar system, beyond Neptune.

Explanation:

The Oort Cloud is an extended shell of icy objects that exist in the outermost reaches of the solar system.

Answer:

b

Explanation:

i took the test

An ion is when an atom or molecule has an electric change True or False

Answers

Answer:True

Explanation:

The maximum allowable concentration of Pb2+ ions in water in a local community is 1.51 x 10-8 M. Could a chemist use 2.00 mL of 0.12 M KBr solution on a 5.00 mL sample of tap water to prove through a precipitation reaction that the water supply is safe? Show all work and reasoning

Answers

Answer:

The water supply is not safe.

Explanation:

Ionically, the reaction is;

Pb^2+(aq) + 2Br^-(aq) -------> PbBr2(s)

Amount of Br^- reacted = 2/1000 * 0.12 = 2.4 * 10^-4 moles

From the reaction equation;

1 mole of Pb^2+ requires 2 moles of Br^- for complete precipitation

x moles of Pb^2+ requires 2.4 * 10^-4 moles of Br^-

x = 1 * 2.4 * 10^-4 /2

x = 1.2 * 10^-4 moles of Pb^2+

Concentration of Pb^2+ precipitated from 5ml of tap water =  1.2 * 10^-4 * 1000/5

Concentration = 2.4 * 10^-2 M

The amount of  Pb^2+ found in the water is greater than the maximum allowable concentration of Pb2+ ions in water in a local community which is 1.51 x 10-8 M. Therefore, the water supply is not safe.

Dissolved: Will give brainliest

Answers

Answer:

im 99% sure it's 175.

Explanation:

keep trucking, i know school is hard but you're doing amazing

This should be 175. Because it's not at 100, it's below 200 and it also passes 150

In what way does the shape of a molecule affect how the molecule is
involved with living systems?
OA. It determines the weight of the molecule.
OB. It determines how the molecule functions.
O C. It determines oxidation states present in the molecule.
OD. It determines what elements are in the molecule.

Answers

Answer:

B

Explanation:

I'm not 100% sure, but B seems like the most likely answer because the shape of a molecule usually is a major factor in how molecules interact with each other.

I hope that helps.

Which of the following shows the correct order of the levels of classification form Largest to smallest

Answers

could you put the answee choicesv

Combine the following ions to create neutral compounds Y3+ and OH-

Answers

Answer:

Y(OH)₃

Explanation:

Given ions:

                  Y³⁺      OH⁻

To find a neutral compound that conforms with the formation of the given ions;

We us the exchange of valency approach to solve this problem. The valency will form the combining power of the ions for the combination.

                                    Y³⁺      OH⁻

Combining power        3           1

Exchange of valency    1            3

 Now the compound is        Y(OH)₃

Please help! Its for chem

Answers

Answer:

can you give me more info

Explanation:

i think it d or c

i got charts to help

Can someone answer this pleasee it’s free 15 points

Answers

the answer is C

have a great day :)

I don’t know

but thank u for the points

I need points hehe

Did you know?

Hawaii is the Widest State in America!!!!!!!

can someone help with with some answers?! :-) please! i need this done in a hour :-( help!!

Answers

What’s the question?

what is C2H8 ? please hurry
(CH4=methane)
(C2H2=acetylene)

Answers

Answer:

Carbon carbon | C2H8 - PubChem.

Explanation:

Brainliest plz :)

Answer:

Carbon carbon | C2H8

Explanation:

happy to help

PLS HELP

What is the correct order for this food chain?
A) grass, lion, bacteria
B) antelope, lion, grass
С) antelope, bacteria, grass
D) grass, antelope, lion

Answers

Answer:

Creo que es  D) grass, antelope, lion

Explanation:

El antílope se alimenta de hierba y el león del antílope.

In an ecosystem, the correct order for the food chain is grass, antelope, lion.

What is an ecosystem?

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.There are different types of ecosystems present.

Learn more about ecosystem,here:

https://brainly.com/question/1673533

#SPJ6

How do you know if a compound is covalent

Answers

If a compound is made from two non-metals it’s bonding will be covalent

Answer:

Compounds containing two elements (binary compounds) can either have ionic or covalent bonding. If a compound is made from a metal and a non-metal, its bonding will be ionic. If a compound is made from two non-metals, its bonding will be covalent.

Which statement best describes the position of a coastal area during a low
tide?
A. It is on a side of Earth that is perpendicular to the Moon.
B. It is on the part of Earth that is experiencing nighttime.
C. It is on the part of Earth that is experiencing daylight.
D. It is on a side of Earth that faces the Moon directly.

Answers

Answer:

A is the correct answer

Explanation:

Moon pulls the ocean upwards causing tides

The position of a coastal area during a low tide is: it is on a side of Earth that is perpendicular to the Moon.

What happens during low tide?

Whenever the absolute bottom, or the box, arrives at a coast, the coast encounters a low tide. Envision the sea is molded like a ball pointing at the moon. The football's sharp closures address the pieces of the Earth encountering elevated tide and the ball's level sides are the pieces of the earth encountering low tide.

Thus, option A is correct.

Find more information about Low tide here:

brainly.com/question/1133278

How many bonds does silicon tetrachloride, SiCl4 have?

Answers

It’s has 4 bonds I believe! I hope this helped :)

?
How many protons, neutrons, and electrons does the following isotope have:
10 protons, 2 neutrons, 4 electrons
4 protons, 6 neutrons, 10 electrons
O
6
protons, 4 neutrons, 0 electrons
4 protons, 2 neutrons, 4 electrons

Answers

Answer:

D. 4 protons 2 neutrons and 4 electrons

Which of the following factors would reduce the yield of a reaction?
A. The reaction occurs very quickly.
B. The reactants form additional unexpected products.
C. The reaction requires a large quantity of heat.
D. The reaction produces a large quantity of heat.

Answers

Answer:

B. The reactants form additional unexpected products.

Explanation:

Hurry up as fast as possible Ill mark you brainlist

Answers

It took 380,000 years for electrons to be trapped in orbits around nuclei, forming the first atoms.

These were mainly helium and hydrogen, which are still by far the most abundant elements in the universe. Present observations suggest that the first stars formed from clouds of gas around 150–200 million years after the Big Bang. Heavier atoms such as carbon, oxygen and iron, have since been continuously produced in the hearts of stars and catapulted throughout the universe in spectacular stellar explosions called supernovae.

What is the process called when a solid becomes a liquid?
melting
freezing
condensing
boiling

Answers

the answer is melting

Answer: melting :)

Explanation:

07-PS1-6 In a laboratory experiment that measures heat energy changes in 1 point
a chemical reaction, what is the most essential piece of equipment?*
Triple Beam Balance
Calculator
Hot Plate
Thermometer
Need answer now!

Answers

Thermometer
Probably a digital thermocouple with high resolution

Which energy transformation produces electricity and is least likely to negatively impact the environment?

A) Generating electricity from a natural gas-fired power plant
B) Generating electricity from a coal-fired power plant
C) Generating electricity from a nuclear power plant
D) Generating electricity from a solar panel system

Answers

Hello!

The answer to this question is: D) Generating electricity from a solar panel system.

Thank you for asking this question!

It would be greatly appreciated if you thanked me and marked me as the brainliest!

Have an amazing day.

The energy transformation which produces electricity and is least likely to

negatively impact the environment is generating electricity from a solar

panel system.

Generating electricity from solar panel involves the use of solar energy from

the sun to generate electricity . This type of energy doesn't emit any type of

harmful radiation or release toxic compounds into the atmosphere which

makes it the least likely to negatively impact the environment.

Other options emit any type of harmful radiation or release toxic compounds

into the atmosphere which makes option D the most appropriate.

Read more on https://brainly.com/question/11867576

Which metal pan should the chef choose because it undergoes the largest temperature change for a given input of energy?
The chef should choose the copper pan.

The chef should choose the iron pan.

The chef should choose the aluminum pan.

The chef can choose any of the three pans, because all three pans will undergo the same amount of temperature change.

Answers

Answer:

If the chef is in a hurry we would assume he would want the pan to heat up so copper

Explanation:

Answer:

A. The chef should choose the copper pan.

Explanation:

Copper conducts heat well because its atoms contain only one free valence electrons in the outer shell. Elements with a low number of valence electrons transfer heat the best, and copper has only one. Valence electrons move about freely.

Good luck on your test (Or whatever it is) !!

ANSWER ASAP
Which reacts with carbonates?
A. Bases only
B. Acids and bases
C. Neutral solutions
D. Acids only

Answers

Answer:

D. Acids only

Explanation:

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