1. What is the mass of zinc in your penny?

Answers

Answer 1

Answer:

97.5%

Explanation:

the US mint specifies pennies as 2.5% copper in 97.5% zinc


Related Questions

Why can single bonds rotate freely?

Answers

Carbon atoms in single bonds rotate freely. Rotation can occur because the heaviest electron density in the σ bond exists along an imaginary line between two carbon nuclei. Rotation does not change this electron distribution; the bond strength remains constant throughout rotation.

Approximately what percentage of a human's DNA is used for coding Information for the synthesis of proteins?
O 5%
O 25%
О 99%
O 95%

Answers

I’m pretty sure it is 25 % :))

One percent  of a human's DNA is used for coding Information for the synthesis of proteins.

What is DNA?

DNA  is a hereditary material which is present in human beings as well as all other living organisms.  Every cell which is present in an organism's body has DNA  which is the same. Most of the DNA is situated in the cell's nucleus  and small amount of it can be found in the cell's mitochondria as well.

Information which is stored in DNA is stored as codes made up of four chemical bases namely, adenine, thymine , cytosine and guanine.Human DNA consists of 3 billion bases .The order of the bases determines information which is required for building and maintaining an organism.

DNA bases are capable of pairing up with each other. Adenine pairs with thymine and guanine pairs up with cytosine .Each base is also attached to a sugar molecule  and a phosphate group. A base, phosphate  sugar are together called as nucleotides.

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Your question is incomplete, but most probably your full question was,approximately what percentage of a human's DNA is used for coding Information for the synthesis of proteins?

5%

25%

99%

95%

1%

which factor is abiotic A.)water B.) a plant c.) animal

Answers

Answer:

answer is A.) Water

Answer:

a) water

have a good day!

What is the smallest unit found in a bar of gold. A. atom. B. Cell. C. Element. .D Nucleus PLEASE HELP

Answers

Answer:

c. element

Explanation:

Because gold is its own element, a gold bar is only made of one element.

The smallest unit found in a bar of gold is the nucleus of its atom.  The core of an atom is called its nucleus which contains the nucleons protons and neutrons.

What is nucleus?

An atom is composed of  nucleons and electrons. The core of an atom is called its nucleus. Protons and neutrons are located inside the nucleus. They are called the nucleons.

The electrons are revolving around the nucleus through circular trajectories of fixed energies. Every elements are composed of their atoms. Atoms of different elements combine together to form compounds.

Gold is 79th element in periodic table. It is a transition metal in d-block. As every other elements the smallest unit are atoms where the atomic nuclei are even smaller units.

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SO IM DOING A SCIENCE FAIR PROJECTABT BATH BOMBS AND I NEED NAMES CAN YOU GUYS DROP NAME IDEAS FOR MY PROJECT PLEASEE
ITS ABOUT BATH BOMBS

Answers

BATH BOMB 1

BATH BOMB 2          WILLLLLLLLLLLL

                       HOPE I HELPED UWU

BATH BOMB 3

BATH BOMB 4                  

Enter the correct 4 digit code (no spaces)

Answers

3618 is the numbers for the graph

Please answer this question please brianlest

Answers

Answer:

ok, maybe draw like a few plants and dear, you know and draw them out of cells, like the shape. so like a bunch of cells together making the shape of a deer or plant and stuff. i hope this helps

Explanation:

There have been made 2 attempts of oxygen production by potassium permanganate.In the first attempt they have got 75ml oxygen in 3 minutes whearas there have been got 100ml in 5 minutes by the 2nd attempt.In what case the speed of the oxygen production is bigger???
Pls explain your answer

Answers

Answer:

The speed of oxygen production is bigger in the first attempt.

Explanation:

In the first attempt, since 75ml oxygen is produced in 3 minutes, the rate of oxygen production is r = volume of oxygen/time = 75 ml/3 min = 25 ml//min

In the second attempt, since 100ml oxygen is produced in 5 minutes, the rate of oxygen production is r' = volume of oxygen/time = 100 ml/5 min = 20 ml//min

Since r = 25 ml/min > r' = 20 ml/min, the speed of oxygen production is bigger in the first attempt.

why is digital better then analog music

Answers

Once a digital recording is made, the bandwidth is set in place. An analog recording is considered unlimited. Therefore, it can move to a higher and higher resolution without losing its original quality.

Calculate the average atomic mass for an imaginary element "E" that has the following isotope abundances:
56.67 % E-102.658 amu
43.33% E-104.770 amu

Answers

Answer:

Average atomic mass of E = 103.57 amu

Explanation:

Given data:

Average atomic mass of E = ?

Abundance of E-102.658 = 56.67%

Abundance of E-104.770 = 43.33%

Solution:

Average atomic mass of E = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass of E = (56.67×102.658)+(43.33×104.770) /100

Average atomic mass of E =  5817.63 + 4539.68 / 100

Average atomic mass of E = 10357.31 / 100

Average atomic mass of E = 103.57 amu.

Wastewater filtration

Pros and cons of secondary water filtration?

Answers

Pros:
• Water filtration is cost effective, and it does not require a lot of money to maintain
•It is very easy and straightforward to use

Cons:
•Thorough cleaning and care of the equipment is very vital so that they can carry out the water softening process without any hitch whatsoever


“Sewage"; used water from a community (homes, businesses and industries, stormwater runoff)



Type
Pros
Cons
Pitcher
Low upfront cost; no installation needed.
Does not remove all contaminants; filters must be changed every couple of months and will increase the yearly cost of the filter system; filtration is slow.
Faucet/On the Counter
Relatively inexpensive; can switch between filtered and unfiltered water; easy to install; ideal for drinking and cooking water.
Faucet mounted may not fit on all faucets; decreases flow rate; filters are changed every couple of months.



On the counter may require some installation and can take up space; can sometimes be expensive.
Under-sink
Filter system is out of sight; infrequent filter changes; ideal for drinking and cooking water.
Requires installation; can sometimes be expensive; takes up cabinet space.
Whole House
Whole house kept clean from one system; various processes available; if system uses filters they are changed every couple of years.
Professionally installed; very expensive.
Reverse Osmosis
Removes most unwanted contaminants.
5-step process; filters replaced frequently; very expensive; wastes a lot of water.
Distillation
Removes heavy metals, fluorides and bacteria.
Not energy efficient; takes up a lot of space; very expensive.
Ultraviolet (UV)
Does not use heat or chemicals to remove contaminants.
Any color in water will prevent UV from working; sometimes filtration is necessary prior to UV; has a low effectiveness for removing chemicals.

Hope all these helps

 Can anybody help it 8th grade science about the sun

Answers

Answer:

The sun is at the (edge) of our solar system

and is much (hotter) than anything else in the solar system (95%) of the entire mass of the solar system is contain in the sun

Does the size of the solute (sugar) affect the rate of dissolving?​

Answers

Answer:

Yes

Explanation:

The rate at which a solute dissolves depends upon the size of the solute particles. Dissolving is a surface phenomenon since it depends on solvent molecules colliding with the outer surface of the solute.

Brainliest?

I need help...................

Answers

With what? There’s no question or photo

PLZ I NEEEEEEEDDDDDD HELP

Answers

Answer:

2h+02=h20

Explanation:

2 in front of h on left side

2 in front of h on right side

Answer:

Explanation:

1. __1___ Fe + __1___ S → __1___ FeS. 2. __1___ H2 + __1___ Cl2 → __2___ HCl. 3. __2___ Mg + __1___ O2 → __2___ MgO. 4. __1___ O2 + __2___ H2

Please answer this question please brianlest

Answers

Answer:

Explanation:

non-living things do not posses any thoughts, ideas, feelings, or senses. they do not breathe, eat, grow, reproduce, or have any senses. they differ because a non-living things isn't alive and cannot function in this world.

Answer:

The term living thing refers to things that are now or once were alive. A non-living thing is anything that was never alive. In order for something to be classified as living, it must grow and develop, use energy, reproduce, be made of cells, respond to its environment, and adapt.

Explanation:

your welcome

Cells have a ______ ___________, a thin layer that controls what goes in and out of the cell.

Answers

Answer:

cell membrane

Explanation:

Pretty sure it’s cell membrane

How would a flood impact an ecosystem?


Loss of life


Displacing organisms' habitats


Polluting bodies of water as the floodwater recedes


All answers are correct

UPDATE: Just took the quiz the answer is D. All of them.

Answers

Answer:

all of them

Explanation:

took test

Floods can cause soil erosion and sedimentation. It will destroy all the properties of human beings. All the options are correct. Thus the correct option is D.

What is Flood?

Flood is defined as a natural disaster which results from the overflow of water on land. It is mainly generated by the heavy rainfall, sudden snow melt, etc. It affect the ecosystem adversely.

The floods are mostly affected to the coastal regions. It is even a threat to life of people. The habitat of aquatic organisms are destructed by the floods. The ground water is found to be contaminated with pathogenic microbes and causes water borne diseases.

As a result of floods the life of small insects which play a primary role in the ecosystem of food chain is also affected. All fields like education, communication, transport, etc. of our state is affected by the floods.

The floods can cause loss of people, low water quality, destruction of habitats. Some times the effect of flood in our life will be long lasting.

Thus the correct option is D.

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how many moles are in 4.38 of AgNO2

Answers

Answer: 0.02 moles

Explanation:

The number of moles in 4.38 g of AgNO₂ is equal to 0.028 mol.

What is a mole?

A mole can be described as a standard unit that can be utilized to calculate a given number of particles. The constituents counted are usually individually distinct but identical entities.

A mole of the substance can be used to calculate quantities of atoms, molecules, ions, or other particular particles. The quantity of matter can be described as measured by elementary entities.

The number of constituents present in one mole is equal to 6.023× 10 ²³ which is known as Avogadro’s constant.

Given, the mass of AgNO₂ = 4.38 g

The mass of one mole of AgNO₂ =  153.87 g

The number of moles of in 4.38 g of AgNO₂ = 4.38/153.87 = 0.028 mol

Therefore, the number of moles of  AgNO₂ is equal to 0.028 mol.

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is Jupiter's volume more than 1,000 times that of Earth

Answers

Answer:

cómo lo ahí no sé amigo blue the rous

Answer:

yes it is i did it on ixl

Which of the following are behaviors of a gas that can be explained by the kinetic-molecular theory?
a. Gases are compressible.
b. Gases exert pressure.
c. All particles of a gas sample move at the same speed.
d. Gas particles can exchange kinetic energy when they collide.
e. Gas particles move in a curved-line path.

Answers

Answer:

b,c,d

Explanation:

gasses exert pressure, all particles of a gas sample move at the same speed. gas particles can exchange kinetic energy when they collide.

Why is much of the ocean floor so difficult to see?


Answers

Answer:

because ocean currents deposit sediment on the ocean floor.

If the spring constant is 12.6N/m and a spring is stretched by 0.25m, how much force has been applied?

Answers

Answer:

3.15N

Explanation:

We use this equation:

F= k∆x

Where ∆x refers to the amount or stretch or compression and k is the spring constant.

F = force

k = spring constant

∆x = change in length of spring

To find the value of F:

F= k∆x

F= 12.6x0.25

F= 3.15N

can the element calcium be found in more than one state of matter?

Answers

Answer:

No

Explanation:

The element calcium be found in more than one state of matter ( Only in Solid state )

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What is the total amount of heat energy, in
joules, absorbed by 25.0 grams of water when the
temperature of the water increases from 24.0°C to
36.0°C?

Answers

Answer:

0.84

Explanation:

total heat energy =mass ×specific heat capacity (4.2kJ)×temp change

mass=25g convert to kg to get 0.025

specific heat capacity is 4.2

temp change=36.0-24.0=8.0

q = mC∆T

m=25.0

c=24.0

ΔT=36.0

25.0 * 24.0 * 36.0 = 21,600 jules

The equation q =   MC ∆ T, where m is the sample mass, c is the specific heat, and  ΔT is the temperature change, can be used to determine the amount of heat acquired or lost by a sample (q).

How can you figure out how much energy was consumed?

This is simple to perform; to calculate the amount of heat absorbed, multiply the substance's heat capacity by its mass and the temperature change.

The specific heat capacity of a substance is the amount of energy needed to raise the temperature of 1 gram of that substance by 1 degree Celsius. With a value of 4.18 J/g/°C, water has one of the highest heat capacities.

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If a 6N weight is hung on a spring, and it extends by 0.2m, what is the spring constant (k)? What do you think the units are?

Answers

Answer:

K = 30N/m

Explanation:

We use this equation:

F= k∆x

Where ∆x refers to the amount or stretch or compression and k is the spring constant.

F = force

k = spring constant

∆x = change in length of spring

We don't know the value of k, so we make k the subject:

k = F/∆x

k = 6N x 0.2m

k = 30N/m

What is the purpose of a catalyst?

Answers

Answer:

option c

Explanation:

as catalyst increases the reaction while activation energy is inversely proportional to rate of reaction, so option c is correct

The purpose of a catalyst to lower the activation energy of a reaction.

What is catalyst?

A type of chemical that, without becoming consumed by the process, speeding a chemical reaction or reduce the temperature as well as the pressure required to initiate one. The addition of a catalyst to speed up a reaction is known as catalysis.

What is activation energy?

The bare minimum additional energy needed by a reactive molecule to transform into a product is considered as activation energy.

The purpose of a catalyst is to lower the activation energy of a reaction.

Therefore, the correct answer will be an option (C).

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which of the following is the best description of an elment
A. A substance that cannot be broken down into simpler substance
B. A small particle made with a specific chemical composition
C. A naturally occurring mineral made of more than one substances
D. A collection of atoms that have different abilities when joined together

Answers

Answer:

d

Explanation:

atoms join together to produce elements

Answer:

An element is a substance whose atoms all have the same number of protons: another way of saying this is that all of a particular element's atoms have the same atomic number. Elements are chemically the simplest substances and hence cannot be broken down using chemical reactions.

Explanation:

1. Solid fossil fuel formed from _____________ remains. Produces energy when _____________.

Answers

Organisms and burned

HELP HELP HELP HELP HELP

Answers

In order to properly measure the displacement, the object must be completely submerged, however in the diagram the wood is floating. So the measured displacement will only be a fraction of what it actually is.

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