Which evidence is an indication that a chemical reaction has occurred?
a.melting substance
b.boiling substance
c.frezzign of substance
d.formation of a gas

Answers

Answer 1

Answer is D formation of gas.

Explanation: I hope that helped/have a great day.


Related Questions

11/9/2020
Describe the types of possible
weathering that has occurred to
this boulder
Use vocab words to describe what
is happening

Answers

Rainy bc of erosion

What holds the two parts of a metal together?
S
E
A​

Answers

Answer: The metal is held together by the strong forces of attraction between the positive nuclei and the delocalized electrons (The Electron Sea Model.

Explanation: I hope that helped!

The metal is held together by the strong forces of attraction between the positive nuclei and the delocalized electrons (Figure 1). Figure 1: Metallic Bonding: The Electron Sea Model: Positive atomic nuclei (orange circles) surrounded by a sea of delocalized electrons (yellow circles).

Which two is it brainliest and 100points:)

Answers

Answer:

b c

Explanation:

Answer:C

Explanation:

Quinton answer me or I will never talk to u again pls

Answers

Answer:

huh

Explanation:

Is it OK for people to post fake vacation pics and other fake info on social media? Why or why not? Use facts and details from the Article to back up your answer.

Answers

Answer:

No, It is not okay to pretend on social media.

Explanation:

No, it is not okay for people to post fake vacation pics and other fake info on social media. This is very wrong, as -

This 'all time look good, feel good, have a happening life' approach of social media - implies showing only the positive side & not negative side of people's life. However, in real life is not a bed of roses. Faking things out implies that pretending to be cool has become more important than sharing deep meaningful relationships, & highlights  superficial desire of false popularity. It is also harmful to people being communicated this fake image, as they might indulge into any social involvement, on the basis of unreal image of the concerned person.

Answer:

it is not ok because there are other people that will look at those pictures and say aww i wish i were them but we all need to exept who we are

hope this helped

mark me brainliest please

Explanation:

Indicate the answer choice that best completes the statement or answers the question.
The crust and upper mantle make up Earth's
O a. lithosphere Ob. asthenosphere
O d. continents
Oc. core
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
Question 9
Question 10
Question 11
Question 12
Question 13
Question 14
Question 15
Question 16
Question 17
Question 18
Question 19
Question 20
LO

Answers

Answer: lithosphere

Explanation:

continents are a part of lithosphere.

core is a structure of earth

what is the name for C3Cl8 and is it a covalent or polar covalent bond?

Answers

Answer:

Propane, octachloro- | C3Cl8 - PubChem

The name of C3Cl8 is octachloropropane. It is a covalent bond.

What are covalent bonds ?

Covalent bonds are formed when two atoms share electrons. In the case of octachloropropane, the carbon atoms share electrons with the chlorine atoms. The electrons are shared unequally, so the bond is polar covalent.

The name octachloropropane is derived from the Greek words "octo" (eight) and "chloro" (chlorine). The prefix "octa" refers to the number of chlorine atoms in the molecule. The suffix "propane" refers to the three carbon atoms in the molecule.

Find out more on covalent bonds at https://brainly.com/question/3447218

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what is the total number of electrons found in the valence shell of noble gas in the ground state?

Answers

Answer:

eight

Because the noble gases are the least reactive of all elements, their eight valence electrons are used as the standard for nonreactivity and to explain how other elements interact.

Explanation:

which has a greater atomic size carbon or boron

Answers

Answer: Boron

Explanation:

hope this helps

Answer: Boron.

Explanation: The trend of atomic radius increases as we go from right to left on a periodic table, so since Boron is further left, Boron has a slightly larger radius.

compare the values of the spin quantum number for two electrons in the same orbital

Answers

If there are 2 electrons in the same orbital, the spin numbers would be different for both of these 2 electrons. One would have an up spin and the other a down spin.

Carbon dioxide consists of a central carbon atom with an oxygen atom on each side. Draw a model of the molecule formed by putting lines between the atoms to represent bonds so that each atom has the correct number of bonds.

Answers

Explanation:

Structure of Carbon dioxide is in the attachment.

Here,

Hybridization of Carbon is sp

Bond angle 180°

Structure = linear

Single bond consists of sigma bond. Double bond consists of one sigma and one pie bonds. Triple bond consists of one sigma and two pie bonds.

Answer:

O=C=O

Explanation:

this is all you need

A person aims for a target with a wooden bow and arrow. The image shows the path of the arrow to the target. How can the person increase the elastic potential energy in this situation? A) aim the bow higher, increasing the height of the arrows flight. B) sharpen the arrows tip, causing it to strike the target with more force. C) change the bow’s material, increasing the stiffness of the bow. D) pull the arrow farther back, increasing the stretch of the bows string.

Answers

Answer:

d

Explanation:

Convert 3.55 moles Nacl to formula units

Answers

Answer:

2.14 x 10²⁴ formula units

Explanation:

Given parameters:

Number of moles of NaCl  = 3.55moles

Unknown:

Formula units of NaCl  = ?

Solution:

A mole of substance contains the avogadro's number of particles. The number of particles could be protons, atoms, neutrons, formula units etc.

  1 mole of substance  = 6.02 x 10²³ formula units

   3.55 mole of NaCl  = 3.55 x 6.02 x 10²³

                                    = 2.14 x 10²⁴ formula units

What happens if you overmix muffins?

Answers

Answer: When you overmix the muffin batter, it crushes the air bubbles and ruins the fluffy texture.

Explanation: → Follow this tip: To ensure a batch of light, fluffy muffins, mix the dry ingredients with the wet ingredients until just barely combined, and no more dry flour is visible.

The batter is going to be tasting bad and gross

Any 1 know These Chemicals??

Answers

Answer:

A) 1 & 2 only

Explanation:

Seeing that the chemicals present are in question one I take it you are asking about that question.

Decreasing the concentration causes a decrease in reaction process and also the total amount of product you would get out of the given reaction

Decreasing the temperature causes the molecules in this reaction to become less excited or reactive, thus causing the reaction to slow down

Which statement describes the blood type of a person with the alleles IAi?

It is type AB because I and i are codominant.
It is type AB because A and i are codominant.
It is type A because i is dominant and A is recessive.
It is type A because A is dominant and i is recessive.

Answers

Answer:

I answer this question I think I said the second one

Answer:

yep its the second one

Explanation:

All mutations _____.

Answers

could u provide more like on what to answer this so confusing

What type of chemical reaction can be seen below?
C2H6 + O2 - CO2 + H2O

Answers

Carbon dioxide and water
Ethane combustion reaction 2C2H6 + 7O2 → 4CO2 + 6H2O

how many moles of carbon are in 3.0 moles of c6h12o6

Answers

Answer:

i.e. mass of 1 mole of glucose, C6H12O6 = (6 × 12.01 + 12 × 1.01 + 6 × 16.00) g = 180.18 g (using atomic weight data to 2 decimals) 1 mole of carbon atoms weighs 12.01 g and there are 6 moles of C atoms in 1 mole of glucose, so the mass of carbon in 1 mole of glucose = 6 × 12.01 g = 72.06 g.

is this anwser correct

Answers

Yes it is correct I think not for sure

Answer:

Yes. It is definitely correct

The photograph shows one way individuals work together in groups. What
kind of work is shown in the photograph?

Answers

I think you forgot to upload the picture so I don’t think we can help you... sorry

ROY G BIV arranges the colors of the rainbow *
In order of increasing energy
In order of increasing wavelength.
O In order of decreasing frequency.

Answers

Answer:

Wavelengths..

Explanation:

The colors we see always go from red, which is least refracted, through orange, yellow, green, blue, indigo and violet -- Roy G Biv. The blue, indigo and violet wavelengths are refracted the most as sunlight passes through raindrops.

awnser this they had no subject so i pick that for science for brainliest awnser

Answers

Answer:

B

Explanation:

will mark brainliest please help!!!

Answers

Answer:

1. C
2. E
3. F
4. D
5. A

which of the following is NOT a substance?

A. sodium
B. water
C. alcohol
D. air
E. table salt

can select more than one if needed​

Answers

I believe the answer is d Air

Answer:

c. alcohol

it has no substance

1. Raw egg to boiled egg.
2. Batter to idli.
3. Wet clothes to dry clothes.
4. Woollen yarn to knitted
sweater.
5. Grain to its flour.
6. Cold water to hot water.
7. Straight string to a coiled string.
8. Bud to flower.
9. Milk to Cheese.
10. Cowdung to biogas.
II. Ice cream to melted ice-cream.
12. Stretched rubber band to
its normal size.
13. Souring of milk.
14. Ripening of a mango.
15. Dissolving sugar in water.

these are reversible or Irreversible, chemical or physical, Natural or manmade, periodic or non periodic,desirable or undesirable?​

Answers

Answer:

1.Irreversible

2.Physical

3.

Which of the following is a chemical property?
A:
mass
B:
oxidizes in air
C:
boiling point
D:
solubility

Answers

The answer is B.oxidizes in air

which reaction is faster?why?

Answers

Answer:no answer

Explanation:

Temperature. Usually reactions speed up with increasing temperature. Physical state of reactants. Powders react faster than blocks - greater surface area and since the reaction occurs at the surface we get a faster rate.

answer correctly for a brainleist! :)

Answers

Answer:

summer

Explanation:

Why because the earth is around the sun the

What ion will be formed by the selenium atom shown below when it has a stable set of valence electrons?
Selenium atom
A. Se6+
B. Se2+
C. Se6-
D. Se2-

Answers

Answer:

Explanation:

D. Se2−

Selenium is in Group 16 of the periodic table, and it typically has 6 valence electrons. To achieve a stable set of valence electrons, it will either try to gain two more electrons to form Se²⁻or lose six electrons to form Se⁶⁺. Therefore, the correct option is option D.

An ion is an atom or a molecule that has gained or lost one or more electrons, resulting in an unequal number of protons and electrons. When an atom gains electrons, it becomes negatively charged and is called an anion. Conversely, when an atom loses electrons, it becomes positively charged and is called a cation.

Ions play a crucial role in chemical reactions and the formation of chemical compounds, as they are attracted to one another based on their opposite charges. This process helps stabilize the electron configuration and achieve a more stable, lower-energy state.

Thus, the ideal selection is option D.

Learn more about Ions, here:

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