Which test uses color change to reveal oil-based paints?

mass spectometry
gas chromatography
potassium hydroxide test
ethanol test

Answer:

nitrogen dioxide

Explanation:

this was on my chemistry test

Mercury is in a liquid state

Mercury's melting point is somewhere around -34 Degrees Celcius. Thus it should be assumed it will be a liquid at this temperature. Not a gas however as mercury's boiling point is somewhere in the 600 Degree range

Answer:

The phase transition that represent the the cooling of gaseous water to form liquid outside a bottle left outside which is a process known as is represented by the arrow 2

Explanation:

The different phase transitions that occur in mater are;

1) A phase transition from the solid phase to the liquid phase which occur by heating, represented by the arrow 2 and the process is known as melting

2)  A phase transition from the liquid phase to the gaseous phase which occur by further heating the liquid, represented by the arrow 1 and the process is known as evaporation

3) A phase transition from the gaseous phase to the liquid phase which occur by cooling the hot gas, represented by the arrow 2 and is known as condensation

4) A phase transition from the liquid phase to the solid phase which occur by further cooling the liquid, represented by the arrow 5 and the process is known as freezing

5) A phase transition from the solid phase to the gaseous phase which occur by heating the cold solid, represented by the arrow 3 and the process is known as sublimation

6) A phase transition from the gaseous phase to the solid phase which occur by cooling the gas, represented by the arrow 6

Therefore, the phase transition that represent the the cooling of gaseous water to form liquid outside a bottle left outside is represented by the arrow 2

Answer:

3.75mole

Explanation:

Given parameters:

Mass of the carbon(C) = 45g

Unknown:

Number of moles of carbon  = ?

Solution:

The number of moles of a substance can be found using;

      Number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

Molar mass of carbon  = 12g/mol

    Number of moles  = [tex]\frac{45}{12}[/tex]   = 3.75mole

Answer:

h B i f M r

Explanation:

that was just my estimated guess but it seems right to me

Answer:

number 3 i think

Explanation: im sorry if im wrong

Answer:

Option A. 3.3

Explanation:

The following data were obtained from the question:

Input force = 150 N

Output force = 500 N

Mechanical advantage (MA) =.?

Mechanical advantage can be defined as force output divided by force input i.e

Mechanical advantage (MA) = force output / force input

With the above formula, we can obtain the mechanical advantage of the pulley as shown below:

Input force = 150 N

Output force = 500 N

Mechanical advantage (MA) =.?

MA = force output / force input

MA= 500/150

MA = 3.3

Thus, the mechanical advantage of the system is 3.3

Answer:

No.

Explanation:

No, one mole of peas do not fit inside a house because one mole is equals to 6.022 × 10²³ units which is a very large value. mole only use for atoms, ions and molecules etc due to very small size but mole is not used for big sized materials such as peas and other vegetables etc. So that's why we can conclude that one mole of peas did not fit inside a house.

Answer:

it contains 2.56 x 10^15.

Explanation:

given no. of moles = 4.26 x 10^-9 atoms

one mole has 6.022 x 10^23 atoms

so it contains 4.26 x 10^-9 x 6.022 x 10^23 atoms

(If we suppose silver's atomic weight as 108.)

domain, kingdom, phylum, class, order, family, genus, and species

domain

Archaea, Bacteria, and Eukarya

kingdom

animal, plant, fungi, protist and monera.

phylum

Porifera, Coelenterata, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata, Chordata.]

Answer:

C

Explanation:

the answer is Brittleness

The characteristic that is not present in metals that can be attributed to the bonding and arrangement of atoms is brittleness. The correct option is A.

Metals are the chemical elements present in the periodic table. They are classified as metals because of their properties of reacting, softness and malleability, etc.

Some metals are iron, oxygen, magnesium, aluminum, etc. They are both solid, liquid, or gas. They are highly electrical or thermally conductive, ductile, and reflective.

On the other hand, non-metals are less reactive, very hard, and non-malleable. Brittleness is the quality of non-metals, not metals. Due to the brittleness of non-metals, they are not easy to the bonding and arrangement of atoms.

Thus, the correct option is A. brittleness.

To learn more about metals, refer to the link:

https://brainly.com/question/1854312

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Answer:

Both have a definite mass and volume, but only the frozen Ice cube has definite shape

Explanation:

Water(Liquid) Takes on the forms of other things, Such as cups

Answer:

viruses can kill you vaccines can save your life.

Explanation:

Answer:

The effect of leaky vaccines on how disease spreads is explained by the “imperfect-vaccine hypothesis”. It holds that, without vaccination, a very virulent virus can get into a population and kill infected hosts (people or animals) very quickly – before they have a chance to spread it. This means that the virus will die out very quickly too, as all potential hosts will be dead or immune to it.

Explanation:

Ernest Rutherford gave the atomic model based on the centrally located mass of the atom. The α particles passed through the foil as an atom has empty spaces.

Rutherford gave the atomic model by bombarding the gold foil with an alpha particle from radioactive material. It gave the atomic structure constituting the sub-atomic particles.

Most of the alpha particles passed straight through the foil which concluded that most of the space in the atom was empty and the major mass was accumulated at the center.

Therefore, the α particles passed straight as most of the atom has empty spaces.

Learn more about Rutherford's atomic theory, here:

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Answer:

Gylcerol Back Bone

Carbons and Hydrogens

Explanation:

Answer:

Hydrogen or hydroxonium ions in the solution

Hydroxyl ions in the solution

Explanation:

A pH of 1 shows there is a lot of hydroxonium ions in the solution and a pH of 14 shows there is a lot of hydroxyl ions in the solution.

Number of molecules NH₃ = 4.45 x 10²²

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

mol of NH₃ = n = 0.074

So the number of molecules :

[tex]\tt N=n\times No\\\\N=0.0740\times 6.02\times 10^{23}\\\\N=4.45\times 10^{22}[/tex]

Answer:

electromagnet

Explanation:

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of wire wound into a coil. A current through the wire creates a magnetic field which is concentrated in the hole, denoting the center of the coil.

Answer:

if it is hydroxide

Explanation:

when metal. and non-metal most the time reacts and the none metal is hydroxide u can easily say it Is base

Answer:

Mass = 80.6 g

Explanation:

Given data:

Mass of N₂ consumed = ?

Mass of CaCN₂ formed = 265 g

Solution:

Chemical equation:

CaC₂ + N₂      →       CaCN₂ + C

Number of moles of CaCN₂:

Number of moles = mass/molar mass

Number of moles = 265 g/ 92.11 g/mol

Number of moles = 2.88 mol

Now we will compare the moles of CaCN₂ and N₂.

                               CaCN₂            :            N₂

                                   1                   :              1

                                  2.88              :            2.88

Mass of N₂:

Mass = number of moles × molar mass

Mass = 2.88 mol × 28 g/mol

Mass = 80.6 g

Answer:

Wavelength increases, and frequency decreases.

for my lazy friends its letter C

Explanation:

e2021

The statement 'wavelength increases and frequency decreases' best describes electromagnetic waves moving from gamma rays to radio waves (option C).

The term wavelength makes reference to the distance between the picks of the waves in the electromagnetic spectrum.

In conclusion, the statement 'wavelength increases and frequency decreases' best describes electromagnetic waves moving from gamma rays to radio waves (option C).

Learn more about electromagnetic waves here:

https://brainly.com/question/14015797

Answer:

D +405.0kJ mol-¹

Explanation:

Since bond energy is the energy required to break a bond, the energy of dissociation of X₂H₆ = +2775 kJmol⁻¹.

Since there is one X-X bond and six X-H bonds,

Bond energy of one X-X bond + Bond energy of six X-H bonds = energy of dissociation of X₂H₆.

Since bond energy of one X-H bond = 395 kJ mol⁻¹, then

Bond energy of one X-X bond + Bond energy of six X-H bonds = energy of dissociation of X₂H₆

Bond energy of one X-X bond + 6 × one X-H bond = +2775 kJmol⁻¹.

Bond energy of one X-X bond + 6 × 395 kJ mol⁻¹ = +2775 kJmol⁻¹.

Bond energy of one X-X bond + 2370 kJ mol⁻¹ = 2775 kJmol⁻¹

Bond energy of one X-X bond = 2775 kJmol⁻¹ - 2370 kJ mol⁻¹

Bond energy of one X-X bond = +405 kJmol⁻¹

Answer:up

Explanation:

I LOVE balancing chemical equations!

Answer:

2 Zn + 2 HCl -> 2 ZnCl + 1 H₂

Explanation:

These coefficients correct balance this equation.

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Answer:

Unicellular organisms do not have levels of organization. Unicellular organisms need fewer resources and some can live in harsh conditions. They are very small and are easily eaten by other organisms

Explanation:

Answer:

New Hampshire is the most in proverty.

Explanation:

I learned this before.

Answer:

Oklahoma state

Explanation:

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Answer:

aristotle din not beileve in anything. he looked at the world describe what happend