True or False: If you find the percent by mass of all of the elements in a compound, it will always add up to exactly 100.00%

Answers

Answer 1

Answer: true

Explanation: because Mass percentage composition is found by calculating a fraction of the total mass by each element present in a compound. The whole compound itself would equal one or 100% in all the elements that make it up would only be a fraction, so it will always have to add up to 100%


Related Questions

You observe an unknown substance under a microscope. You notice that the molecules are tightly packed together and not moving. Based on this observation, what phase of matter is this substance likely in?

Your answer:

a. Solid

b. Liquid

c. Gas

d. Plasma

Answers

Answer:

The answer would be A because they are tightly packed.

What is the first stroke of a 4 stroke cycle?
A. intake
B. exhaust
C. compression
D. power

Answers

Answer:

Intake

Explanation:

It is the very first thing you do.

Figure 4: Four-Stroke Cycle In the first stroke, also known as the Intake Stroke or Induction, the piston travels from the top dead centre (TDC) to the bottom dead centre (BDC) with the intake valve open and exhaust valve closed. This creates a vacuum due to the increase in volume in the combustion chamber.

The stroke cycle is used in the operating cycle of gasoline or petroleum engines. The first stroke in the 4 stroke cycle is intake. Hence, option A is correct.

What is stroke cycle ?

An internal combustion (IC) engine is referred to as having four strokes  when the piston is rotating the crankshaft. A stroke refers to the whole journey of the piston along the cylinder, in either direction.

In gasoline/petrol engines, a four-stroke cycle is used. The four strokes are intake (1), compression (2), power (3), and exhaust (4). The intake port is on the right's blue side, and the exhaust port is on the left's brown side.

The piston head is surrounded by a thin sleeve called the cylinder wall, which provides a space for the combustion of fuel and the production of mechanical energy. Therefore, the first stroke of a 4 stroke cycle is intake.

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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!!!!!!!

Is a tooth made out of matter or not matter?

Answers

Human teeth are made up of four different types of tissues.

Assignment Summary For this assignment, you will construct a scientific model of the water cycle to show how water is recycled through an ecosystem. Once you have drawn your model on a poster board, you will write one to two paragraphs explaining how water is transferred within and between organisms and the environment. Background Information Water is a very important compound. Organisms need water to carry out life-maintaining processes such as growth and development. Without water, living things will not survive. Water continually flows among the atmosphere, land, water, and living organisms. This process, called the water cycle, allows water to be recycled as it moves through Earth’s spheres. Materials Assignment Instructions Step 1: For this project, you are expected to submit the following: 1. Your model of the water cycle 2. One to two typewritten paragraphs describing the water cycle Step 2: Prepare for the project. a) Read through the guide before you begin so you know the expectations of this project. Pay particular attention to the instructions you need to follow to create a model on your poster board. b) If anything is not clear to you, be sure to ask your teacher. Step 3: Gather materials for the model. a) Start with a blank poster board. Be sure to put your name on it. b) You may either draw the parts of the water cycle or print images to construct a model on your poster board. Gather any drawing tools that you will need, or print any images you want to use. Step 4: Create a model of the water cycle. a) Your model should include bodies of water such as lakes and oceans, organisms, air, and land. b) Draw arrows indicating how water moves within an ecosystem and between organisms and their environment. Be sure to include the Sun and gravity in your model. c) Include short phrases on your poster that summarize what occurs at each stage of the water cycle Step 5: Write a paragraph describing the water cycle. a) Type one to two paragraphs describing the full water cycle. Be sure to use full sentences and proper grammar.

Answers

Answer:

Explanation:

Earth's water is always in movement, and the natural water cycle, also known as the hydrologic cycle, describes the continuous movement of water on, above, and below the surface of the Earth. Water is always changing states between liquid, vapor, and ice, with these processes happening in the blink of an eye and over millions of years.

edge 22

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.

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A bike rider approaches a hill with a speed of 8.5 m/s. The total mass of the bike and the rider is 85 kg. Find the kinetic energy of the bike and the rider. If the rider coasts up the hill calculate the height at which the bike will come to a stop. (h=PE/mgh)

Please help me!! this is due in like 20 minutes!!

Answers

KE=3070.625 J

Height = 3.686 m

Further explanation

mass of bike+rider=85 kg

velocity = 8.5 m/s

[tex]\tt KE=\dfrac{1}{2}mv^2\\\\KE=\dfrac{1}{2}\times 85\times 8.5^2\\\\KE=3070.625~J[/tex]

Conservation of energy :

(KE+PE)₁ (downhill) = (KE+PE)₂ (up the hill)

PE₁=0⇒h=0

KE₂=0⇒v=0(stop), so equation becomes :

KE₁=PE₂

[tex]\tt KE_1=3070.625\\\\KE_1=mgh_2\\\\3070.625=85\times 9.8\times h\Rightarrow h=3.686~m[/tex]

What is magnetic force ? How is the this force
4 Sી ભIndSCO​

Answers

Answer:

Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion. ... The magnetic force between two moving charges may be described as the effect exerted upon either charge by a magnetic field created by the other.

Explanation:

brainlest pls

[tex] \huge \boxed{\mathbb{QUESTION} \downarrow}[/tex]

What's magnetic force ?

[tex] \huge \boxed{\mathfrak{Answer} \downarrow}[/tex]

Magnetic force is referred to as the force/phenomenon which is exerted by a magnet when they attract or repel each other through the poles. It's produced by an electric charge.There are 2 poles ⇨ i) North Pole & ii) South Pole.The like pole repel each other while the different poles attract each other. Magnetism is also known as magnetism or magnetic attraction.

PLEASE ASAP
A substance that is corrosive ___.
A. Changes Color
B. is slippery
C. Eats away at other materials
D. Tastes bitter

Answers

Choice c - eats away other materials

:(
Write out the equation for combustion of solid calcium and balance the equation

Answers

use Socratic for the answer hope it hlo elf

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

A plant would not be able to complete photosynthesis without
OA. glucose.
ОВ.
oxygen.
OC.
food.
OD.
water.

Answers

Answer:

Glucose

Explanation:

It's the food plants need to complete photosynthesis.

Water is the answer

7.62 x 10^23 molecules of CO2 are contained in a tire. How large is the tire (in liters)?​

Answers

Answer: 7.62e+23

Explanation:

please help this is due today

Answers

A. Solid Liquid Gas

Mechanical waves travel through a ________________________ and
Electromagnetic waves can travel through _____________________.

Answers

Answer:

Mechanical waves travel through a medium and

Electromagnetic waves can travel through air and solid materials, but also through the vacuum of space.

Explanation:

The model represents how electromagnetic radiation transmits energy.
What does the model show?
A. Many light waves traveling away from a source
O B. Two light waves traveling perpendicularly to a source
C. Several light waves circling a source
D. A single light wave traveling away from a source.

Answers

The model represents where electromagnetic radiation transmits energy should be option d. A single light wave traveling away from a source.

What is electromagnetic radiation?

It is the energy that should be transmitted at the fixed velocity via the sinusoidally that varied from the electric and magnetic fields.

Here the frequency of variation of the energy should be presented by the Greek letter ν.

Hence, the option d is correct.

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The model depicts the transmission of energy by electromagnetic radiation. The model depicts a single light wave departing from a source.

What describes the light as electromagnetic waves?Light as a wave: Light is a type of electromagnetic wave that can be represented mathematically (described). A shifting magnetic field is produced by a shifting electric field, according to this paradigm. Light is produced when the electric field changes as a result of the changing magnetic field.Light can be thought of as a wave. Light is a type of electromagnetic wave. A fluctuating electric field, according to this hypothesis, generates a fluctuating magnetic field. The interaction of a changing magnetic field with a changing electric field produces light. When charged particles, such as electrons and protons, move, they generate electromagnetic fields, which transport the type of energy known as electromagnetic radiation, or light.

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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

Which term refers to the ability to do work?
energy
power
force
motion

Answers

Answer:

Energy

Explanation:

Answer: energy

Explanation:just learned it last month

What is the name of this compound Fe₃N₂?

Answers

Answer:

it is (Ferric Nitride)

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) !!

The ionization energies for removing successive electrons from sodium are 496 kJ/mol, 4562 kJ/mol, 6912 kJ/mol, and 9544 kJ/mol. The great jump in ionization energy after the first electron is removed indicates that

Answers

Answer:

The great jump in ionization energy indicates that the most stable form of the sodium atom- the noble gas configuration, was reached after the removal of the first electron.

Explanation:

Sodium atom has an electronic configuration of 2,8,1. After the first electron has been removed from a sodium atom, the ion formed now has a noble gas configuration which assigns stability to it.

Noble gases have very high ionization energy due to the stability conferred on the by virtue of their completely filled outermost shells. They do not have need to lose electrons to attain stability. Also, because they have the most protons of their period, their atomic radius is reduced as electrons are pulled into the nucleus.

So, the great jump in ionization energy indicates that the most stable form of the sodium atom- the noble gas configuration, was reached after the removal of the first electron.

The great jump in ionization energy after the first electron is removed indicates that the next electron is removed from an inner shell and not from the valence shell.

The ionization energy is defined as the energy required to remove an electron from an atom. There are ionization energies in an atom as there are electrons in the atom.

For sodium atom, five ionization energies are shown which are; 496 kJ/mol, 4562 kJ/mol, 6912 kJ/mol, and 9544 kJ/mol. The great jump in ionization energy after the first electron is removed indicates that the next electron is removed from an inner shell and not from the valence shell.

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

Answers

What’s the question?

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

Where is nature can you find isomers?

11 points!!!

Answers

Answer:

Isomers are defined as the molecules or polyatomic ions which have similar molecular formula but different in arrangements of atoms.

Isomers can be found  in food items carrying glucose (C6H12O6), galactose or fructose,  they all have the same chemical formula but differ structurally and chemically.

Glucose is found in vegetables and milk, galactose found in dairy products, and Fructose is found in fruit juices.

Which of the following are evidences of continental drift?

A similar fossils found in several continents
B similar rocks existed in different continents
C puzzle fit of several continents
D All of the above

Answers

The answer would be A

7. A gas ______.
A. has a definite shape but no definite volume
B. has a definite volume but no definite shape
C. has no definite shape or volume
D. has definite shape and volume

Answers

Answer:

C

Explanation:

A gas is a state of matter that has no fixed shape and no fixed volume gases have lower density than other states of matter such as solids and liquids.

Which phrase best describes speed?

A. Rate of change in velocity.

B. Rate of change in position to motion.

C. Total change in position as described by distance and direction.

D. Rate of motion.

Answers

Answer:

D

Explanation:

Rate of motion

The answer is D :) hope this helps

Lattice energy is an estimate of the bond
conductivity
group
length
strength

Answers

Answer:

Lattice energy is an estimate of the bond strength.

Lattice is an estimate of strength

will the mass stay the same everywhere that an object goes?​

Answers

Answer:

The mass of a given object is the same everywhere, but its weight can change. We use balances to measure weights and masses.

Answer:

yes its weight that changes.

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:

Other Questions
The periodic table is an arrangment of the chemical elements, ordered by atomic number, into families, and by doing so illustrates the periodic properties of the elements. If we review the elements found in the second column of the periodic table, the alkali earth metals, we know one characteristic common to all elements in this family, besides being metals, is that they are Could u all check this if am correct before i turn it in. . Beth is making gingerbread men. She uses 2 raisins for eyes and 3 raisins for buttons for each gingerbread man. She buys 4 boxes of raisins, each with 120 raisins in it. How many dozens of gingerbread men can she make This is an excerpt from a law passed in 1883. First, for open, competitive examinations for testing the fitness of applicants for the public servicesuch examinations shall be practical in their character, and so far as shall relate to those matters which will fairly test the relative capacity and fitness of the person examined to discharge the duties of the service into which they seek to be appointed. What is the name of this law? Dawes Severalty Act Dawes Severalty Act Pendleton Act Pendleton Act Pure Food and Drug Act Pure Food and Drug Act Sherman Antitrust Act Sherman Antitrust Act Humanists believed that scholars shouldstudy only classical texts.O focus on religious pursuits.O study a variety of subjects.play musical instruments. Object A has a mass of 500g and object B has a mass of 300g. Which object is more dense? Select all the common nouns Ravens are a familiar sight from the Arctic Ocean to the meditation sea What is desertification, and what causes it?FREE AWNSERS!!! WITH PROOF!! What is the y-intercept of the quadratic functionf(x)= (- 8)(x +3)? Solve this inequality for x: -46 - 8x > 22A. X -8.5D. X > 8.5 Read this sentence from paragraph 2 of the story. It seemed almost mystical, like turning straw into gold, and Mr. Pollock was a master. How does the authors allusion to turning straw into gold from the folktale Rumpelstiltskin contribute to your understand of Bens feelings about abstract art and artists?a .It expresses his beliefs that modern painting techniques produce bright, colorful art.b .It stresses Bens desire to turn himself into a famous abstract artist when he gets older .c.It emphasizes Bens sense of the magical nature of the artistic process. d. It reveals his admiration for Mr. Pollocks ability to create valuable art from simple paints. Which of the following scenarios is representative of how agricultural practices can attect the environmentA) Increased oxygen levels in a pond due to fertilizer rundtB) sediment accumsation in a decly cater near a farmC) soil compaction caused by tllageD) Increased plant groenh caused by the application of herbicidesEl Improved quality of life due to abundance of food for the populationPlease select the best ansver from the chaices provided 4(a+3) - 7 = 6a -21 aaaaaaaaaaaaaaaaaa how many ATP are made from cellular respiration a questiom for the big carb himself no cap Select all ratios equivalent to 5:10 Select all that apply. *4:68:167:14 PLEASE HELP ASAP x^2-5x The primary purpose of __________________________ is to facilitate diagnosis, treatment and patient care what is 699.03 to the nearest penny?need this ASAP thanks What information does setting provide the reader? Why is that information important?