Which is the best example and explanation that a physical change has occurred?

Answers

Answer 1
Rip King von like to send love to their family 63-63= von

Related Questions

Classify each organic compound based on the functional group it contains.
ether
carboxylic acid
ester
alcohol
Molecular Structure
Type of Compound
I-O-I
Η Ο
1 10
C-C-0-H
1
H
H
-I
H
II
H
1
H-C
1
H
H
1
-C
1
H
1
H
1
H
1
H
H
I
H-C
1
H
H H
I
C-0-C-H
1
1
H H
1
H-CC-O-H
1
H H

Answers

Answer:

H2C2O1

Explanation:

Answer:

Carboxylic Acid

Ester

Ether

Alcohol

Explanation:

The emission spectrum of iodine is shown below. A line spectra with 2 purple lines, 6 blue lines, 3 light blue lines, 3 green-blue lines, 6 green lines, 8 yellow lines, 6 orange lines and 8 red lines. Which is the absorption spectrum? A line spectra with 4 purple lines, 6 blue lines, 3 light blue lines, 5 green-blue lines, 6 green lines, 7 yellow lines, 3 orange lines and 14 red lines. A line spectra with 6 purple lines, 9 blue lines, 6 light blue lines, 3 green-blue lines, 6 green lines, 2 yellow lines, 5 orange lines and 10 red lines. A line spectra with 2 black lines in purple, 6 black lines in blue, 3 black lines in light blue, 1 black line in green-blue, 10 black lines in green, 8 black lines in yellow, 6 black lines in orange and 8 black lines in red. A line spectra with 4 black lines in purple, 8 black lines in blue, 6 black lines in light blue, 3 black line in green-blue, 10 black lines in green, 4 black lines in yellow, 4 black lines in orange and 12 black lines in red.

Answers

Answer:

it's b

Explanation:

The emission spectrum which is a line spectrum of iodine consists of 6 blue lines as it absorbs yellow light.

What is  emission spectrum?

Emission spectrum is defined as a spectrum of a chemical compound or substance composed of frequencies of electromagnetic radiation. Radiations which are emitted while electron make transition from higher to lower energy level.

Energy of photon is equal to the difference between the two energy states . There are many possible electronic transitions in an atom and every transition has a specific wavelength.

Collection of different transitions with respect to different wavelengths makes up an emission spectrum.Emission spectrum of each element is unique and therefore spectroscopy is used to identify elements which are present in different substances.

Learn more about emission spectrum,here:

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#SPJ5

When energy is changed from one form to another, _____.

all of the energy is changed to a useful form

a physical change occurs

all of the energy can be accounted for

some of the energy is lost entirely

Answers

Answer:

some of the energy is lost entirely

Explanation:

A substance X reacts with ammonium nitrate to produce a gas that turns damp red litmus paper blue. X must therefore be:
a) A salt
b) A catalyst
c) An alkali
d) An acid

Answers

Answer:

option C is correct

Explanation:

litmus paper turns red in acidic solution and turns blue in alkaline solution and turns purple in neutral solution

How do you separate a mixture?

Answers

Answer:

We can seperate a mixture by various methods

Explanation:

Distillation, Evaporation, filtration and chromatography

Which one of the following statements about orbitals is INCORRECT?

1) orbitals are regions in space where one is likely to find an electron

2) orbitals can hold up to two electrons

3) orbitals can hold two electrons provided they are spinning in the same direction

4) s, p, d and f orbitals are possible

Answers

3) is the incorrect statement. Electrons must pair with opposite spins since they are both negatively charged and would therefore repel each other.

3) orbitals can hold two electrons provided they are spinning in the same direction

We define an orbital in chemistry as a region in space where there is a high probability of finding an electron.

Each orbital holds a maximum of two electrons which spin in opposite direction according to Pauli exclusion principle.

According to this principle no two electrons can have the same set of quantum numbers. As a result, the spin quantum numbers of two electrons in the same orbital must differ hence they spin in opposite directions.

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What’s the best answer?

Answers

The answer would be more heat

what are most of the needed formulas to find the molar volume and the molar concentration (Cm) 11th grade chemistry​

Answers

Answer:

Explanation:

molar volume=moles*given volume

for molar concentration we use two formulas molarity and molality

molarity=no of moles/volume

molality=no of moles/kilogram

what are the 3 types of bonds in chemistry? and how can you tell when a chemical has that bond?

Answers

Answer:

Ionic bonding, Covalent bonding, Metallic bonding.

» My memory

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds. » Wikipedia

I SWEAR THIS IS WAY TOO EASY, WHY AM I THAT STUPID, HELP ME AND ILL MARK U BRAINLIEST

Answers

Answer:

i think the first one is gravity and second one is rotation

Explanation:

Astatine-210 has a half-life of 8.08 days. What fraction of a sample of astatine-210 is left unchanged after 16.16 days?

Answers

Answer:

0

Explanation:

Given parameters:

Half-life  = 8.08days

Unknown:

What fraction is left unchanged after 16.16days = ?

Solution:

The half - life of a substance is the time taken for the half of a radioactive material to decay to half.

 

  Day 0           Day 8.08         Day 16.16

   100%                 50%                 0%        Parent

    0%                     50%                100%     Daughter

After 16.16 days, non of the original sample will remain unchanged.

Which receptors are responsible for the production of saliva?

Answers

Answer:

taste receptor

Explanation:

Good luck :)

what happens to molecules when the temperature drops or lowers

A the molecules stop moving

B the molecules get closer together

C the molecules start moving faster

D the molecules become smaller

Answers

The answer for this one is A.

Which number is the same as 4.8 x104
a. 0.00048
b. 480000
C. 48000
d. 480

Answers

Answer:

I'm Pretty Sure It Would Be C

Answer:

C it is yeah...°∆°

Explanation:

......

CAN SOMEONE PLEASE HELP ME WITH THIS PLZ

Answers

Answer:

the pressure increases

What does chemical weathering do to the original minerals (THIS IS SCIENCE BUT I COULDN'T FIND SCIENCE CATAGOREY)

Answers

Answer:

Chemical weathering changes the composition of the original minerals.

Explanation:

Consider the balanced equation below.

Upper P Upper C l Subscript 3 Baseline + Upper C l Subscript 2 Baseline right arrow Upper P Upper C l Subscript 5.
What is the mole ratio of PCl3 to PCl5?

Answers

Answer: The mole ratio of [tex]PCl_3[/tex] to [tex]PCl_5[/tex] is 1: 1

Explanation:

According to the balanced chemical equation ,the number of atoms of each element has to be same on reactant and product side. The stoichiometric coefficients of the species represent their number of moles.

[tex]PCl_3+Cl_2\rightarrow PCl_5[/tex]

Thus in the reactants, there is 1 mole of [tex]PCl_3[/tex] and 1 mole of [tex]Cl_2[/tex] molecule. And thus there is 1 mole of [tex]PCl_5[/tex] in the product as well.

Thus the mole ratio of [tex]PCl_3[/tex] to [tex]PCl_5[/tex] is 1: 1

a gas tank is under 1 atm pressure at room temperature. if the temperature halved,what will happen to the pressure ​

Answers

Answer:

The pressure will also be halved.

Explanation:

Gay-Lussac's law states that the relationship between temperature and pressure is directly proportional to each other. If the temperature goes up, so will the pressure.

What does the chemical formula show?
a) The number of elements in each molecule
b) The number of atoms in each molecule
c) How heavy the molecule is.
d) The elements in the molecule and the number of atoms of each one .​

Answers

Answer:

A

Explanation:

You can eliminate C because you need to consult a periodic table to determine the mass (not the weight).

There are other answers you could use. The wording is awfully sloppy.  D is an example of that. The elements part is true, the atoms part is not really true in all cases.  For example NaCl is table salt and both the elements are ions, not atoms. Na is plus ion and Cl is minus one. B is wrong for the same reason.

I think in the end I would choose A.  I think this is a very sly question. It is not really testing chemistry. It is testing how well you know your definitions.

this is a lot of points and I will give brainlets for the correct answer

Answers

Answer:13132

Explanation:123123

I'm a bit stupid, that's why I'm going to ask for help, can you be nice and help me? Thank you

Answers

1. Ion
2. Valence electron
3. Isotopes
4.Covalent
5. ionic

Explanation:

ion

valence electrons

isotope

covalence

ionic

Choose the balanced chemical equation below that best represents the following reaction:

When baking soda (NaHCO3) reacts with hydrochloric acid (HCl), carbon dioxide bubbles (CO2) are created, along with water (H2O) and sodium chloride (NaCl).




NaCl + H2O → NaHCO3 +CO2 + HCl


CO2 +H2O + NaCl → NaHCO3 + HCl


NaHCO3 + HCl → CO2 + H2O + NaCl


HCl + NaCl + H2O → NaHCO3 +CO2

Answers

The balanced chemical equation :

NaHCO₃ + HCl → CO₂ + H₂O + NaCl

Further explanation

A balanced chemical reaction shows that the number of atoms of the reactant and the number of atoms of the product is the same

When baking soda (NaHCO3) reacts with hydrochloric acid (HCl), carbon dioxide bubbles (CO2) are created, along with water (H2O) and sodium chloride (NaCl) .

This statement shows that

Reactants (located to the left of the reaction)

Baking soda (NaHCO₃) and Hydrochloric acid (HCl)

product (located to the right of the reaction)

Carbon dioxide(CO₂),water  (H₂O) and Sodium chloride (NaCl).

So the reaction :

NaHCO₃ + HCl → CO₂ + H₂O + NaCl

The diagram below shows the distance traveled by two light waves in 1 second.

Based on the diagram, which of these conclusions is correct?

The frequency of Wave 1 is double the frequency of Wave 2.
The frequency of Wave 2 is double the frequency of Wave 1.
The wavelength of Wave 1 is four times the wavelength of Wave 2.
The wavelength of Wave 2 is four times the wavelength of Wave 1.
Please help

Answers

Answer:

The frequency of Wave 2 is double the frequency of Wave 1.

Explanation:

Waves with higher frequencies have shorter wavelengths, and lower frequencies have longer wavelengths.

Atoms of two different elements must have different

Answers

Atomic number The atomic number of each element is different than other Elements.

Answer:

Atoms of two different elements must have different atomic numbers.

Explanation:

Which electron notation is incorrect?
1s 2s 2p 3s 3p 10
1s 2s 2p 3s 3p3
1s2 282 2p 3s 3p6

Answers

The first one is wrong
The first one my guy is wrong

what is always true of a week acid??????
A) It only partially dissociates in solution.
B) It does not dissolve in water.
C) It contributes only one proton.
D) It has been diluted with water.

Answers

Answer:

I'm pretty sure it's A

Explanation:

Answer:

for the  a p e x  quiz:

it dissociates completely in solution.

Explanation:

a p e x

Calculate the number of moles in 7g of nitrogen gas​

Answers

Answer:

0.2498mol[tex]N_{2}[/tex]

Explanation:

7gN2 x [tex]\frac{1 mol}{2(14.01) g}[/tex]

=0.2498mol N2

Nitrogen gas has the formula [tex]N_{2}[/tex] so therefore that means you would have to multiply the mass in the molar by 2. To solve for the number of moles you need to cancel out the grams, you do this by using the molar mass of nitrgoen gas. You get the value on in the denominator from the periodic table (atomic mass of element). The grams will cancel out, leaving you with the number of moles when you divide 7/2(14.01).

who ran the control room chernobyl part 1

Answers

Is this about among Us if so I have no idea

The specific heat of a substance which absorbs 7.5 x 10^3 J of
heat when a sample with a mass of 1.0 x 10^5g of the
substance increases in temperature from 10°C to 90° C will
be:

Answers

Answer:

9.4 x 10^-4 J/g°C

Pleaseeesseeeeesssseredseeeesss

Answers

Answer:

B. Electrons travel through the sol

Explanation:

thats your answer :)

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