What is the medium of the wave shown in the paragraph?

Answer:

Explanation:

A chemical formula can be defined as a notation that is used to show which element and how many is contained in a chemical compound.

Also, in chemistry, the sum of charges of the anion and the cation of any ionic compound is always equal to zero.

A chemical equation is considered to be balanced when the amount of reactants on the left is equal to the amount of products on the right.

Therefore;

[2]FeBr3 + [3]Na2S → [1]Fe2S3 + [6]NaBr

In the above chemical equation, we will balance the reactants in the chemical equation with the smallest coefficients possible;

[tex] 2FeBr_{3} + 3Na_{3}S ----> Fe_{2}S{3} + 6NaBr [/tex]

Two (2) moles of Iron (III) Bromide reacts with two (2) moles of Sodium Sulfide to form Iron (III) Sulfide and Sodium Bromide.

Answer:

 Number of molecules = 1.25 x 10 30 molecules

 Avogadro’s number = 6.022 x 10 23

 Number of moles = ?

 Formula

 Number of moles = 1.25 x 10 30

6.022 x 10 23

= 2.07 x 106 moles

Explanation:

Answer:

Maybe is D....

Explanation:

When the hydrogen peroxide decomposed,it graph such as A so maybe the formation of hydrogen peroxide is opposite direction as the A....Hope can help you.....

Answer:

bal2 is the correct answer hope this hlps have a great rest of your day.

Explanation:

That is true he was known as the hair buyer

Answer:

its true.

i did it on edg 2020

Answer:

I'm pretty sure you'll be fine

Explanation:

I've swallowed more than a small amount and I'm ok sort of

Answer:

Beaker

Explanation:

In the laboratory, we often need to transfer liquids from a large stock container to a graduated cylinder in order to measure a specific volume of liquid.

This is done using a beaker. A beaker is a lipped cylindrical glass container for laboratory use (Oxford dictionary).

Hence, when transferring liquids from the large stock container to a smaller container such as a graduated cylinder, we use a beaker.

Answer: [Xe] 6s^2 6p^3

Explanation: The noble gases are on the last column of the periodic table and Xenon (Xe) is the noble gas before Bismuth (Bi). Then you go down to the next row which is 6s^2 and 6p^3.

Answer:

The correct answer is {Xe] 4f14 5d10 6s2 6p3

Explanation:

Answer:

B 18.4L

Explanation:

Answer:

The answer is 18.4 mL

The liquid is between 19 and 17

so the answer will be 18.4 mL

:

Option (c) is the correct answer.

Explanation:

It is known that when we move down a group then there is increase in size of atom. This is because there occurs increase in number of shells in the atom.

Also, when an atom loses electrons then it acquires a positive charge and size of the atom decreases. On the other hand, when an atom gain electrons then it acquires a negative charge and size of the atom increases.

Since, both Rb and K are same group elements and Rb has larger atomic size than K.

Hence, we can conclude that out of the given options K^{+}

+ has the smallest size.

Answer:

K+

Explanation:

Just took the quiz :)

c) 12.0 L He would have the largest number of representative particles at STP

Given

The gas samples

Required

The largest number of particles

Solution

The largest number of particles = the largest amount of moles

At STP 1 mole = 22.4 L and 1 mole = 6.02 x 10²³ particles

Quickly we will be able to determine that option C has the largest number of particles because it has the largest number of volumes

or we can find the mole of each gas sample

Let's find each mole of the gas sample

a. 0.10 L Xe

[tex]\tt \dfrac{0.1}{22.4}=0.0045[/tex]

b. 0.007 L SO3

[tex]\tt \dfrac{0.007}{22.4}=0.00031[/tex]

c. 12.0 L He

[tex]\tt \dfrac{12}{22.4}=0.536[/tex]

d. 7 L O2

[tex]\tt \dfrac{7}{22.4}=0.313[/tex]

Answer:

It will look like a v starting the at point (0,0) with a slope of 2

Explanation:

Answer:

look at the graph

Explanation:

hope this helps, pls mark brainliest :D

Answer:

SULFUR: S²-

ALUMINIUM: Al³†

NITROGEN: N³-

CALCIUM: Ca²†

Answer:

B)10.0 dm3

Explanation:

Now we have to apply Gay-Lussac's law which states that gases combine in simple volumes provided the temperature and pressure remain constant.

                                               2NO(g) + O2(g) ------>2NO

combining volumes                2            :   1               :  2

Volumes before reaction       8.0            6.0               0.0

Reacting volumes                   8.0            4.0                8.0

Volumes after reaction           -                 2.0              8.0

Therefore;

Total volume after reaction = 2.0 + 8.0 = 10.0 dm^3

The volume of the mixture after the reaction is  10 dm³

The correct answer to the question is Option B. 10 dm³

The above is simply a demonstration of Gay-Lussac' law. The volume of the mixture after the reaction can be obtained as follow:

                            2NO(g) + O₂ —> 2NO(g)

Combining Vol:   2 dm³  :  1 dm³   :  2 dm³

Before reaction:  8 dm³  :  6 dm³  :  0

During reaction:  8 dm³  :  4 dm³  :  8 dm³

After reaction:    0 dm³  :  2 dm³ :  8 dm³

The Volume after the reaction = 2 + 8 = 10 dm³

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Answer:

That's because the glass walls of the greenhouse trap the Sun's heat. The greenhouse effect works much the same way on Earth.

Explanation:

Gases in the atmosphere, such as carbon dioxide, trap heat just like the glass roof of a greenhouse. These heat-trapping gases are called greenhouse gases.

The rate law for the reaction : r=k.[A]²

Given

Reaction

A ⟶ B + C

Required

The rate law

Solution

The rate law is a chemical equation that shows the relationship between reaction rate and the concentration / pressure of the reactants

For the second-order reaction it can be:

1. the square of the concentration of one reactant.

[tex]\tt r=k[A]^2[/tex]

2. the product of the concentrations of two reactants.

[tex]\tt r=k[A][B][/tex]

And the reaction should be(for second order) :

2A ⟶ B + C

Thus, for reaction above (reactant consumption rate) :

[tex]\tt r=-\dfrac{\Delta A}{2\Delta t}=k[A]^2[/tex]

The parts of a forest ecosystem could not become a fossil are; deer footprints in the soil and a puddle.

A fossil is formed from the remains of plants and animals that have died. Anything that is not plant or animal material can never be turned into fossil. Fossil is rich in carbon.

A puddle just refers to a percolation of water. A puddle and deer footprints in the soil are not of plant or animal origin.

As such, deer footprints in the soil and a puddle could not become a fossil.

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Answer:

Option A - nucleus

Explanation:

A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds.

Two atoms combine to form a molecule.

What is a molecule?

What is a nucleus?

What is a proton?

What is an electron?

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Answer:

c...............

Explanation:.............................yuuuuuuuuuuuuuuuuuuuuuwoopuuuuuuuu

Answer:

c)vibrating and in a regular arrangement

Explanation:

Copper is a chemical element represented by the symbol Cu and having atomic number 29. Copper is a transition metal which means its subshells are not completely filled and that is why they are vibrating in the room temperature. But copper is a solid at room temperature with regular arrangement of atoms.

Hence, the correct answer is "c)vibrating and in a regular arrangement".

Answer:

[tex]\boxed {\boxed {\sf About \ 2.8 \ grams \ of \ nitrogen}}[/tex]

Explanation:

To convert from moles to grams, we must use the molar mass.

1. Molar Mass

The molar mass of an element can be found on the Periodic Table. We are looking for nitrogen or N.

2. Convert from moles to grams

Use the molar mass as a ratio or fraction.

[tex]\frac{14.007 \ g \ N}{1 \ mol \ N}[/tex]

Multiply the given number of moles (0.20) by the fraction we just made.

[tex]0.20 \ mol \ N *\frac{14.007 \ g \ N}{1 \ mol \ N}[/tex]

When multiplied, the moles of nitrogen will cancel each other out.

[tex]0.20*\frac{14.007 \ g \ N}{1}[/tex]

The denominator of 1 can be ignored to create a simple multiplication problem.

[tex]0.20 *14.007 \ g \ N[/tex]

[tex]2.8014 \ g \ N[/tex]

3. Round

The original measurement of moles (0.20) gives 2 significant figures, the last 2 and 0.

Therefore, we must round our answer to 2 sig figs. This is the tenths place for this number of grams we found.

[tex]2.8014 \ g \ N[/tex]

The 0 in the hundredth place tells us to leave the 8 in the tenth place.

[tex]\approx 2.8 \ g\ N[/tex]

There are about 2.8 grams of nitrogen in 0.20 moles of nitrogen.

Answer:

hope it helps you a little

Answer:

93.33 g of Fe

Explanation:

The balanced equation for the reaction is given below:

4Fe + 3O₂ —> 2Fe₂O₃

Next, we shall determine the masses of Fe and O₂ that reacted from the balanced equation. This can be obtained as follow:

Molar mass of Fe = 56 g/mol

Mass of Fe from the balanced equation = 4 × 56 = 224 g

Molar mass of O₂ = 2 × 16 = 32 g/mol

Mass of O₂ from the balanced equation = 3 × 32 = 96 g

SUMMARY:

From the balanced equation above,

224 g of Fe reacted with 96 g of O₂.

Finally, we shall determine the mass of Fe required to react with 40 g of O₂. This can be obtained as follow:

From the balanced equation above,

224 g of Fe reacted with 96 g of O₂.

Therefore, Xg of Fe will react with 40 g of O₂ i.e

Xg of Fe = (224 × 40)/96

Xg of Fe = 93.33 g

Therefore, 93.33 g of Fe is required to react with 40 g of O₂.

Answer:

A option

Explanation:

Because recatants are in solid form having less enetropy and products are liquid form having more entropy

While other options reactants and products are in same phase gas phase having same entropy

The reaction that would result in increased entropy is the combustion reaction;

KNO3(s)--->K+(aq)+NO3-(aq). Option A

This is further explained below

Generally, a combustion reaction is simply a combustion process that occurs when a material combines with oxygen gas, producing energy as light and heat.

In conclusion, the chemical reaction KNO3(s)--->K+(aq)+NO3-(aq) is has all properties of a combustion reaction as the solid reactants gives an aq solution.

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Answer:

The reaction will be endothermic represented by a positive (+) sign

Answer: When an electric current is passed through a substance to effect a chemical change.

The change in temperature (ΔT) : 56.14 ° C

Given

Cereal energy = 235,000 J

mass of water = 1000 g

Required

the change in temperature (ΔT)

Solution

Heat can be formulated :

Q = m . c . ΔT

c = specific heat for water =  4.186 J / gram ° C

235000 = 1000 . 4.186 . ΔT

[tex]\tt \Delta T=\dfrac{235000}{1000\times 4.186}=56.14^oC[/tex]

Answer: All living things move in some way. This may be obvious, such as animals that are able to walk, or less obvious, such as plants that have parts that move to track the movement of the sun. All living things grow. Earthworms hatch from eggs and can grow up to a metre or more in length! Some earthworms are also able to regrow small parts of their body that have been lost or injured.  Chromists are a diverse group of plant-like organisms and range from very small to very large. They are found in almost all environments.                                            

Explanation: I hope that helped yall!