HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP

A. Chlorine
B. Sulfur
C. Oxygen
D. None of the above

Answer:

D. 5.0

Explanation:

Step 1: Write the balanced equation at equilibrium

2 NO₂(g) ⇄ N₂O₄(g)

Step 2: Calculate the concentration equilibrium constant

The concentration equilibrium constant (Kc) is equal to the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients.

Kc = [N₂O₄]/[NO₂]² = 0.2 / 0.2² = 5

Answer:

c. completely dissolved

Answer:

1. (put in simpler words so no one knows you got it off of brainly)

The electricity that flows to our homes is generated in power stations. From here, it flows through large transmission lines, which carry it to substations. Finally, distribution lines carry electricity from substations to houses, businesses, and schools.

2.  (put in simpler words so no one knows you got it off of brainly)

The transmission over long distances creates power losses. The major part of the energy losses comes from Joule effect in transformers and power lines. The energy is lost as heat in the conductors. This can be minimized by

answer choice 1: reducing technical losses including: replacing incorrectly sized transformers, improving the connection quality of conductors (power lines), and increasing the availability of reactive power by installing capacitor banks along transmission lines.

answer choice 2: (just in case answer choice 1 isn't what you're looking for)

You can reduce losses in your home by spreading out your electricity use evenly throughout the day, instead of running all your appliances at once.

Explanation:

hope this helped <3

1.42x10^24 molecules

40.0 grams NH3 (6.02x10^23/17.0 grams NH3)= 1.42x10^24 molecules

Answer:

yes this is true

Explanation:

Answer:

A) Los alquimistas.

Explanation:

¡Hola!

En este caso, es necesario recordar que en la historia de la ciencia, la alquimia se define como una vieja práctica protocientífica con tintes filosóficas que se enfocaba en la combinación de elementos de la química, metalurgia, física, medicina, astrología, semiótica, misticismo, espiritualismo y el arte; por tal razón, se sabe que esta era la que buscaba el elixir de la vida eterna. Por lo tanto, la respuesta es A) Los alquimistas.

¡Saludos!

Answer:

Heterogeneous mixture.

(The composition is not uniform.)

Answer:

Thats the periodic table of elements

Explanation:

Answer:

1. KCLO3------>KCL + 3/2O2(g)

2. 122.5g/mol

3. 0.2mol

4. 18.5g

Answer:B is right

Explanation: Al loses electrons and is oxidised, Au gains electron. And is reduced

To solve such this we must know the concept of half cell reaction. Therefore, the correct option is option B that is  Al(s) → A1³⁺(aq) + 3e and  Au(aq) + e [tex]\rightarrow[/tex]Au(s)

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

Oxidation is loss of electrons and reduction is gain of electrons. The electron transfer from oxidant to reductant. Al loses electrons and is oxidized, Au gains electron. And is reduced.

Therefore, the correct option is option B that is  Al(s) → A1³⁺(aq) + 3e and Au(aq) + e [tex]\rightarrow[/tex]Au(s)

Learn more about the chemical reactions, here:

brainly.com/question/3461108

#SPJ2

Explanation:

acid, HNO3

base, KOH

salt ,KNO3

Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles KNO3, or 101.1032 grams.

Answer:

D. Paper D, paper C, paper A, paper B

Explanation:

Please check the attached image for a diagram showing clearly the pH colour chart

pH measures how acidic or alkaline a solution is. The pH scale ranges from 1 - 14

Solutions with a pH less than 7 are acidic

Solutions with a pH equal to 7 are neutral

In the image, test papers D and C occur on the left, thus, they are acidic

Solutions with a pH greater than 7 are alkaline

pH test papers are used to test to test how acidic or alkaline a solution is

Answer:

C I'm pretty sure

Explanation:

uhhhhhhhhh yes

Answer:

Ammonium lauryl sulfate, like any other surfactant, makes a good base for cleansers because of the way it disrupts the hydrogen bonding in water. Hydrogen bonding is the primary contributor to the high surface tension of water. In hydrogen bonding with the water surrounding them.

Answer:

The sun is yellowish in color

Explanation:

The Sun is the closest star to the Earth.

The Sun is more than a couple million miles from other stars.

The Sun is not a white dwarf, but will become one in the future.

The Sun IS a yellowish color so.....

Answer:

A. Oxygen is an element because its most basic unit is a single type of atom.

Explanation:

Oxygen is the chemical element with the symbol O and atomic number 8.

Answer:

. Comets go around the Sun in a highly elliptical orbit.

Explanation:

Answer:

Comet's orbit around the sun at a rapidly high speed witch considers the comets orbit a cycle.

Answer:

Option D

Explanation:

Molarity (M) of any solution is equal to the number of moles (n)of solute in it divided by total volume of solution (V)

Mathematically, it can be represented as

[tex]M = \frac{n}{V}[/tex]

Substituting the given values, we get-

[tex]M = \frac{10}{5} = 2[/tex]

Hence, option D is correct

Answer:

we can conclude that there are 0.55 moles in 22 grams of argon.

Answer:

it is used for testing the presence of starch in plants

Explanation:

it is the important element

Answer:

2Mg +O2 -----》 2MgO

the balanced equation

if you start with 2g of Mg let's calculate moles

one mole of mg id 24.30 g

so number of moles =0.08

hence 2 moles of Mg reacts with 1 mole of O2 molecule

so Moles of O2 molecule is 0.04

and mass of O2 in gm is = 16 ×0.04

which is equal to 0.64 gm

so the conclusion is if you start with 2g Mg, you need 0.64 grams of

O2 molecules for this reaction to go to

completion!!

i d k it's right or wrong but i tried my best :)

Explanation:

Since, the boulder is at rest. This means that there is an equilibrium of forces acting on the boulder.

According to principle of equilibrium of forces a body can be in position of rest only when net force acting on body is zero for translation equilibrium and net moment acting on the body must also be zero for rotational equilibrium.

Therefore, net forces and net moment acting on the boulder is zero.

Answer:

15.5g

Explanation:

your welcome

Hello. Although it is not possible to see the video to which the question refers, we can see, in the question, that water is removed from the cylinder as a gas is added to the same cylinder. So we can see that a gas was produced in the reaction, through the displacement of water, that is, if the water starts to be removed from the cylinder, it is because the reaction is producing a gas. If the gas is not produced, water will not come out of the cylinder.

Explanation:

a. The melting point is at 20C and the boiling point is at 80C. The melting point is when a solid is going through a phase change to become a liquid, that is the 1st plateau in the graph. The boiling point is when the liquid is going through vaporization to become a gas. That is the second plateau.

b. At 30C, it is a liquid, since our melting point is at 20C.

c. The substance before 20C is a solid, as we add energy, it will melt and become a liquid.

The graph is different for each substance but in this same configuration where a change in the graph is a different phase or a phase change.

Where that first incline = solid

1st plateau= melting or freezing

2nd incline= liquid

2nd plateau= vaporization or condensation

3rd incline= gas