Chemistry High School

Two or more atoms that have been chemically combined are
called a

Answers

Answer 1

Answer:

compound

Explanation:

Related Questions

What is the importance of protons ?

Answers

Protons are important because they help keep the nucleus together, they also attract negatively charged electrons and keep them in orbit around the nucleus.

The protons inside a atoms nucleus help to bind the nucleus together. They attract the negative charged electrons and keep them in orbit around the nucleus. The number of protons in an atoms nucleus determine which chemical element it is

in your own words describe the process of a physical change​

Answers

Answer:

A physical change is when the form of an object changes, but the substance stays the same.

Example: Ice melting into water.

What is a scale and why do you use it?

Answers

To calculate the weight of something. It is used to find the weight of an object

Answer:

Scale is defined as a system or series of marks used for measuring or registering. An example of scale is what someone would use to figure out the length of something. An example of scale is what someone would use to find out how much they weigh.

Explanation:

Is the equation C2H4 —> 2C + 2H2 + 52.3 exothermic or endothermic?

Answers

Answer:

Exothermic

Explanation:

A black hole is a
a. an object of zero volume and infinite density
b. an object from which nothing, not even light, can escape
c. an object that emits x rays as matter falls into it
d. an object that disappears from our universe
e. all of the above

Answers

Answer:

B. an object from which nothing, not even light, can escape

Explanation:

Question 1
Why can't wee see atoms?

Answers

Answer:

They're too small

Explanation:

Atoms are smaller than the wavelength of visible light

Answer:

too small

Explanation:

What is the process called when the moon bagins to fade from full moon to new moon

Answers

Waining there’s not much to explain here it’s simple moon phases

All covalent compounds donot exist as giant aggregates. Why?​

Answers

This is because of the attractive forces between the molecules with the absence of overall electric charge. Covalent compounds are usually gaseous molecules at room temperature and pressure.

Is sulfur dioxide a element?

Answers

yes it is a element.

What do you think is the difference between an "open" system & a "closed" system?

Answers

Answer:

Hope it help you

Stayhomestaysafe

Plz mark my answer brainliest✍️✍️

Explanation:

There are three types of systems in thermodynamics: open, closed, and isolated. An open system can exchange both energy and matter with its surroundings. ... A closed system, on the other hand, can exchange only energy with its surroundings, not matter.

REAL NAME - SHRESTH DUBEY

the amount of space an object occupies is called its

Answers

Volume is the amount of space occupied in a object

which element has an atom with the following composition? 24 protons, 28 neutrons and 24 electrons.

Answers

Chromium - 28

The amount of protons is equal to the atomic number and this can always be used to identify the element


Which of the following neutral atom configurations satisfies the octet rule?
1s2 2s2 2p6 3s2 3p6
1s2 2s1
1s2 2s2 3s2 3p4
1s2 2s2 3s2 3p6 4s1

Answers

Answer:

2

Explanation:i did the test

The equation, reactants
product + thermal energy, describes a(n)_____
reaction.

Answers

Answer: Here you go

Explanation:

The general equation for an exothermic reaction is: Reactants → Products + Energy.

Given the standard heats of reaction

Reaction ∆H 0

M(s) + 2 X2(g) → MX4(g) −98.7 kJ/mol

X2(g) → 2 X(g) +327.3 kJ/mol

M(g) → M(s) −20.1 kJ/mol


calculate the average bond energy for a single

M-X bond.

Answer in units of kJ/mol.

Answers

Answer:

Explanation:

M(s) → M (g ) + 20.1 kJ --- ( 1 )

X₂ ( g ) → 2X (g ) + 327.3 kJ ---- ( 2 )

M( s) + 2 X₂(g) → M X₄ (g ) - 98.7 kJ ----- ( 3 )

( 3 ) - 2 x ( 2 ) - ( 1 )

M( s) + 2 X₂(g) - 2 X₂ ( g ) - M(s)  → M X₄ (g ) - 98.7 kJ -  2 [ 2X (g ) + 327.3 kJ ] - M (g ) - 20.1 kJ

0 = M X₄ (g ) - 4 X (g ) - M (g ) - 773.4 kJ

4 X (g ) +  M (g ) =  M X₄ (g ) - 773.4kJ

heat of formation of M X₄ (g ) is - 773.4 kJ

Bond energy of one M - X bond =  773.4 / 4 =  193.4 kJ / mole

What is the term used to describe a change in motion?

Answers

Answer:

it should be momentum if im not mistaken

PLEASE HELP WILL GIVE BRAINLIEST​

Answers

It’s the atomic number.

A force is always a push. true or false ?

Answers

True because ur using the force to push

PLEASE HELP ME!!
Water (H2O) is composed of the same elements as hydrogen peroxide (H2O2).

Why do these substances have different properties?


The molecules are the same.


Water has more atoms than hydrogen peroxide.


The atoms are arranged differently in each molecule.


The atoms are the same.

Answers

Answer:

The molecules are the same.

Explanation:

All 6 sides of a cube measure 65mm. Calculate the volume of the cube in cm32

Answers

Same I need help also

calculate the oxidation number of s in S2O8^2-​

Answers

Given problem:

    S₂O₈²⁻

Find the oxidation number of S;

Oxidation number presents the extent of oxidation of each atom of elements a molecular formular or formula unit or an ionic radical.

  For radicals:

          "the algebraic sum of all the oxidation numbers of all atoms in an ion containing more than one kind of atom is equal to the charge on the ion  "

 S₂O₈²⁻;   oxidation number of O is usually -2

             2(S) + 8(-2) = -2

               2S - 16  = -2

               2S = -2 + 16

                2S  = 14

                   S  = +7

The oxidation state of S in the radical is +7

How is iodine 131 similar to a normal atom of iodine?

Answers

Answer: Iodine 131 is a radioisotope with a very short half-life of 8.02 days, making it highly radioactive.

Explanation:

Flowering plants are the most successful group of land plants. This is due, in part, to the trait that could be the label for point C. in the cladogram. Consider the organization of the cladogram. What trait, besides flowers, is unique to this group of plants?

Answers

Answer:

seeds are protected in fruits in such kind of plants.

Explanation:

The flowering plants are also known as Angiospermae, or Magnoliophyta. Flowering plants are plants that grow flowers. Such plants use seeds to reproduce, or make more plants like them.

Seeds are protected in fruits in such kinds of plants.

Examples of flowering plants are daisies, tulips, oaks, apples.

Answer:

Seeds are protected by a fruit

Explanation:

During which process of the water cycle does water change from gas to liquid

Answers

Answer is condensation hope this help you

HELP!!!! PLEASE, it would be much appreciated.

Answers

It is made of cells, D.

d it is made of cells

Explanation:

because it is the one that makes most sense

which substance is a mixture? A. table salt B. gasoline C. aluminium D. carbon dioxide​

Answers

B.) Gasoline. Gasoline is a complex blend of compounds made from petroleum. There are various grades of gasoline. Thus it is a mixture

Where does the heat that is needed to warm the surface of the ocean come from? A. the Sun B. the Earth's interior C. animals D. the Earth's surface

Answers

Answer:

A. The Sun

Explanation:

Answer:

A

Explanation:

Most of our heat source on Earth comes from the Sun.

Heat rising in a hot-air balloon is an example of __________. conduction convection radiation solar

Answers

Answer:Condensation

Explanation:

it

Answer:

convection

Explanation:

I took test I got 100%

This chart shows characteristics of three different types of atoms.

A 3-column table with one row titled valence electrons in three types of atoms. The first column labeled Atom X has entry 6 valence electrons. The second column labeled Atom Y has entry 2 valence electrons. The third column labeled Atom Z has entry 8 valence electrons.
Which statement is best supported by the information in the chart?

Atom X will donate electrons to Atom Y.
Atom X will accept electrons from Atom Y.
Atom Y will accept electrons from Atom Z.
Atom Z will donate electrons to Atom X.

Answers

Atom X will accept electrons from Atom Y.

Answer:

B) Atom X will accept electrons from Atom Y.

Explanation:

because X has 6 electrons and Y has 2 it would make sense for Y to give to X

A plant's growth response to water is called _____.

hydrotropism
geotropism
gravitropism
thigmotropism

Answers

Answer:

A or Hydrotropism

Explanation:

Answer:

hydrotropism Explanation:

because hydro= water and topism= the turning part of an organism hope this helps!! <3

Other Questions
select all expressions equivalent For a rotation r ( x , P ), which of the following is not true? For a pre-image point P, mPAP=x degrees. For the a preimage point A, PA=PA The expression A=B r ( x , P ) A = Br ( x , P ) A = Br ( x , P ) A = Br ( x , P ) A = B means that when point A is rotated x around point P its image is located at point B The transformation rotates every point in the preimage x about a point P Describe the journey to Mecca to perform Hajj in your own words. Keisha has a worksheet with a range of cells using the following columns: Name, Score, Group, Study Group, and Date. Keisha needs to sort the worksheet on the Date field. Which option should she use to most efficiently complete this task?A: Use the Cut and Paste option to reorganize the data to fit that order. B: Use the Filter function to organize the data based on the date. C: Use the Order function to organize the data based on the date.D: Use the Sort function to organize the data based on date order. Who ever answers this I will mark as brainliest The paraboloid z = 3 x x2 2y2 intersects the plane x = 1 in a parabola. Find parametric equations in terms of t for the tangent line to this parabola at the point (1, 3, 17). (Enter your answer as a comma-separated list of equations. Let x, y, and z be in terms of t. What is the range of the function f(x) = 2x+3 If I have a Siberian Husky, then I have a dog." Identify the hypothesis NEED HELP LOTS OF POINTSRead the passage. Which statement best describes how Belle changes over the course of the story?Riding a BicycleIt was a bright Sunday morning when Belle woke up with the biggest smile on her face. She had been looking forward to this day for a long time. Her father was going to teach her to ride a bicycle. She dressed quickly and gulped down her breakfast.After breakfast, Belles father showed her the different parts of a bike. Then he said he would hold onto the back of the bike while she peddled. But Belles excitement got the better of her. She said she wanted to try riding by herself. Her father let go. Belle quickly lost her balance and crashed to the ground. The fall dazed her. She grumpily agreed to let her father keep holding the bike while she rode.Every once in a while, he would let go. The moment he did, Belle would lose her balance and topple over. Her father explained that this was perfectly normal. He said that all first-time riders fall. Even so, Belles mood darkened with each fall. After a while, she wanted to give up and return home.Belles father tried to talk her out of quitting. He pointed toward some other children biking nearby. He showed her how happy they looked as they rode their bicycles. He told her she needed to keep trying. With a little more effort, she would soon enjoy riding just like the other children. His words gave Belle the determination to keep going.After several more failed tries, Belle finally got the hang of it. She began gently peddling by herself, beaming with pride. She had finally done it! That night, she went to bed with a couple of bruises and cuts. But she had an even bigger smile on her face than shed had in the morning. She would forever remember this day and the lesson she learned about never quitting.A. Belle starts showing more trust in her father as he teaches her how to ride a bike.B. Belle becomes less excited as the story goes on, until her excitement for bike riding disappears.C. Belle learns both how to ride a bike and how important it is not to give up.D. Belle gets hurt from falling off her bike, which scares her away from bike riding for good. 5 + x - 14 = -15. Solve for X Help please before its taken:) Find the missing side. Round to the nearest tenth. To what extent does the U.S. Constitution address the ideals of the Declaration of Independence? Fill in the blank: Spanish. Is the answer A or B. Explain why. Thanks. Algo______, Sofia? A. Algo te duelen Sofia?(Tu) B. Algo te duele Sofia?(Tu) In general, research and development costs for projects other than software development should be: A. None of the answer choices are correct. B. Expensed if unsuccessful; capitalized if successful. C. Expensed in the period they are determined to be unsuccessful. D. Expensed in the period they are determined to be successful. E. Deferred pending determination of success. An ice cube is placed in a glass of water. Which of the following best explains theheat transfer?A: The thermal is movingfrom the water to from the ice cube into the water into the watercausing thetemperature ofthe water toincrease.B: the thermal energy is moving from the water to the ice cube causing the temperature of the water to decreaseC: the thermal energy is moving from the ice cube into the water causing the temperature of the water to increaseD: the thermal energy is moving from the ice cube into the water causing the temperature of the water to decrease. a warm cloth wrap around the head usually worn while sleeping. a.babydoll b . nightcap c.nightgown d.nightshirt pls help before 11:59 Which equation shows the ASSOCIATIVE property?Question 3 options:6 - 9 + 5 = 6 - (-9) + 5(6 + (-9) + 5) = (6 + 5) + (-9)-9 + (6 + 5) = -9 - 6 - 5(6 + (-9)) + 5 = 6 + (-9 + 5) Which one of these statements is a myth associated with physical activity? A. Regular exercise can improve strength and endurance. B. Resistance training can help build healthy bones. C. You can focus on losing fat from certain body parts. D. Over-training can decrease performance.