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Answer:

planet A: Saturn

planet B: Mars

planet C: Venus

planet D: Uranus

Explanation:

Answer:

A is Saturn

B is Mars

C is Venus

D is Neptune

Explanation: Saturn is known for its rings and it's the 6th planet on the Solar System. Mars is indeed quite red and it is in the inner comet belt

C is Venus because a day is longer than a year on Venus and D is Neptune because it's a blue and green gas giant.

Answer:

water

Explanation:

Answer:

The answer is d

Explanation:

Answer:

5.47 x 10^23 atoms in Ag (sliver)

Explanation:

0.909 mol of Ag x 6.02 x 10^23 atoms of Ag/ 1 mol of Ag

Answer:

3.36 dm³

Explanation:

STP: Means Standard temperature and pressure.

According to Avogadro's Law, it states that the molar volume of every gas is the volume occupied by one mole of that gas at stp and is equal to 22.4 dm³

From the question,

1 mole of Nitrogen gas (N₂)  occupies a volume of 22.4 dm³

But,

1 mole of nitrogen gas has a mass of 28 g

Therefore,

28 g of nitrogen gas occupies a volume of 22.4 dm³,

Then,

4.2 g will occupy a volume of X dm³

X = (22.4×4.2)/28

X = 3.36 dm³

Answer:

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Explanation:

i record it

Answer:

You can make 149.1g of KCl

Explanation:

1 mole of potassium chloride, KCl, contains 1 mole of potassium, K. That means, with 2.000 moles of K we can make 2.000 moles of KCl. To solve this question we must convert these moles of KCl to mass in grams using its molar mass (Molar mass KCl = 74.5513g/mol):

Mass KCl:

2.000 moles KCl * (74.5513g / mol) =

Answer:

• Abogado

• Administrador o conservacionista de campo

• Agrícola o agrónomo

• Apiculturísta

• Arquitecto

• Arquitecto ambiental

• Asistente de investigación

• Astrónomo

• Bioquímico

• Científico animal

• Científico avícola

• Científico de suelo

• Consejero vocacional

• Contador

• Criador animal

• Economista

• Entomólogo

• Epidemiólogo

• Farmacólogo

• Físico

• Fitogenetista

• Forestal

• Genetista

• Geoquímico

• Geofísico

• Horticultor

• Ingeniero

• Matemático (incluyendo estadístico)

• Meteorólogo

• Nutriólogo

• Profesor

• Químico

• Silviculturiasta (incluyendo forestalista)

• Terapeuta recreativo

• Topógrafo

• Trabajador social

• Urbanista (incluyendo geógrafo)

• Zoologísta

• Técnico científico de cualquiera de las siguientes disciplinas: ciencias agrícolas, astronomía, biología, química, ingeniería, silvicultura, geología, geofísica, meteorología o física

Explanation:

Answer: There are [tex]27.701 \times 10^{23}[/tex] molecules in 4.6 moles of ammonium nitrate [tex](NH_{4}NO_{3})[/tex].

Explanation:

According to the mole concept, there are [tex]6.022 \times 10^{23}[/tex] molecules present in 1 mole of every substance.

Hence, the number of molecules present in 4.6 moles of ammonium nitrate are calculated as follows.

[tex]4.6 \times 6.022 \times 10^{23}\\= 27.701 \times 10^{23} molecules[/tex]

Thus, we can conclude that there are [tex]27.701 \times 10^{23}[/tex] molecules in 4.6 moles of ammonium nitrate [tex](NH_{4}NO_{3})[/tex].

Answer:

WOT in the world is this?

Explanation:

Answer:

Moving from left to right across a period, the atomic radius decreases. The nucleus of the atom gains protons moving from left to right, increasing the positive charge of the nucleus and increasing the attractive force of the nucleus upon the electrons.

Answer:the atomic radius will decrease.The nucleus of the atom will gain protons moving from left to right

Explanation:

Answer:

bekelite is called thermosetting plastic because it irreversibly become ridge when heating..

hope it helps.

Explanation:

have a good day hope its helps you

Answer: 3.6

Explanation: You use the formula pH = -log([H+]) and plug in the 2.4E-4 with a negative log. After you convert H+ to the pH, you will change the final answer of 3.62 to the correct amount of significant figures which is 3.6.

Answer:

Here is the correct answer. 3.6

Ionic bonding in sodium chloride. An atom of sodium (Na) donates one of its electrons to an atom of chlorine (Cl) in a chemical reaction, and the resulting positive ion (Na+) and negative ion (Cl−) form a stable ionic compound (sodium chloride; common table salt) based on this ionic bond.

Hope it helps

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Answer:

7.97 moles

Explanation:

The number of moles (n) of iron (Fe) in this question can be calculated by dividing its number of atoms by Avogadro's number (6.02 × 10²³ atoms).

That is;

n = number of molecule ÷ Avogadro's number

According to this question, the number of atoms of Fe is given as 4.8 x 10²⁴ atoms.

Hence,

n = 4.8 x 10²⁴ ÷ 6.02 × 10²³

n = 4.8/6.02 × 10^(24-23)

n = 0.797 × 10¹

n = 7.97 moles

Answer:

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Answer:

Part A

pH ≈ 2.273

Part B

ΔpH ≈ -4.726

Part C

pH ≈ 1.973

Part D

ΔpH ≈ -0.301

Explanation:

Part A

The pH of a solution is given by the negative concentration of hydrogen ions in the solution

2.0 mL = 0.002 L

The number of moles of HCl in 2.0 mL of 4.0 M HCl is given as follows;

1 Liter of 4.0 M HCl contains 4.0 moles of HCl

2.0 mL = 0.002 L 4.0 M HCl contains 0.002 L/(1 L) × 4.0 M = 0.008 moles of HCl

The concentration of 0.008 moles in 1.50 L is given as follows;

Concentration = The number of moles/(The volume in liters)

∴ The concentration of 0.008 moles in 1.50 L, C = 0.008 moles/(1.5 L + 0.002 L)

∴ The concentration of 0.008 moles in 1.50 L, C ≈ 0.00533 moles/liter = 0.00533 M HCl

Given that HCl is a strong acid, we have that HCl dissociates completely to give equal number of H⁺ and Cl⁻ ions;

The number of moles of [H⁺] in the solution = 0.00533 moles

The pH of the solution = -log[H⁺]

∴ pH = -log[5.33 × 10⁻³] ≈ 2.273

The pH of the 1.5 L of pure water will be approximately 2.273

Part B

The pH of the pure water has changed from neutral (pH = 7) tp pH = 2.273

The change in pH is ΔpH = 2.274 - 7 = -4.726

ΔpH ≈ -4.726

Part C

When 2.0 mL of the 4.0 M HCl is added, the solution above, we have;

C = (0.008 + 0.008)/(1.5 + 0.002 + 0.002) ≈ 1.06383 × 10⁻²

The concentration of the solution becomes, C ≈ 1.06383 × 10⁻² mole/liter

The pH becomes, pH = -log(1.06383 × 10⁻²) ≈ 1.973

Part D

The amount by which the pH has changed, ΔpH ≈ 1.973 - 2.274 = -0.301.

Answer:

A

Explanation:

A catalyst speeds up a reaction by lowering the required activation energy, so it's not B. Like previously stated, the catalyst lowers the activation energy required, so it's not C either. This leaves us with A. Just to double check, does a catalyst speeds up a reaction? Yes! So like it says in A, a catalyst causes the equilibrium to be reached faster. Have a nice day! :)

Catalysts speed up a chemical reaction by causing equilibrium to reach quickly while maintaining the equilibrium's position. Thus, option A is true.

A catalyst increases the reaction rate by decreasing the activation energy of the reaction. As the minimum energy required by the reactants for the reaction is decreased the rate of the formation of products increases.

During the reaction, the catalyst remains unchanged and does not undergo any chemical change. It can increase the reaction rate of both irreversible and reversible reactions.

In an equilibrium reaction, the catalyst can increase the rate of both forward and reverse reaction by reaching the reaction equilibrium at a faster rate and can move the reaction toward the products as well as a reactant.

Therefore, the catalyst causes equilibrium to be reached faster.

Learn more about catalysts here:

https://brainly.com/question/22363846

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Answer:

Explanation:

Answer: D

STRONG ACIDS:

HBr

HCl

HI

HNO3

HClO4

H2SO4

Answer:

2

Explanation:

I did this alderman

Answer:

C. They are basic

Answer:

Is there a picture To go with this?

Explanation:

Answer:

number of protons is the correct answer. Brainliest please

Answer:

✔ octane

CH3CH2CH2CH2CH2CH2CH2CH3

✔ butane

CH3CH2CH2CH3

✔ methane

CH4

✔ decane

CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3

✔ ethane

CH3CH3

Explanation:

An alkane contains only carbon and hydrogen. The following are the accurate names of the compounds;

An alkane is a compound whose only functional group is the carbon - carbon single bond. This compounds contain only carbon and hydrogen.

The correct names of the compounds are;

CH3CH2CH2CH2CH2CH2CH2CH3 - octane

CH3CH2CH2CH3 - butane

CH4 - methane

CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3 - decane

CH3CH3 - ethane

Learn more about alkane: https://brainly.com/question/11256472

Answer:

Family is defined as a specific group of people that may be made up of partners, children, parents, aunts, uncles, cousins and grandparents. An example of a family is a set of parents living with their children. The definition of family is the group of people who share common ancestors.

Family is very important part of our everyday life. It helps us in improving our personality. It also helps us in shaping our life. It teaches us the value of love, affection, care, truthfulness and self-confidence and provides us tools and suggestions which are necessary to get success in life.  Family is a place where you can be yourself. It is a place where you are accepted for what you are. This is where you are completely tension free and everyone is there to help you. Family encourages you when you are surrounded by problems. It helps you survive through tough times and bring joy and happiness into life.

Answer:

100 degree celcius, because it is the melting point of ice ob

Answer: The correct answer is 100 °C, because it is the boiling point of water.

Explanation: A heating curve has two flat lines(Or plateaus). The first one is the melting point, the second one is the boiling point. In your problem, C is the second flat line, so it is boiling point.

Answer:

1 and 2

Explanation:

1. The moon blocks the sun's light from hitting the Earth. (It casts a shadow on the earth by doing so)

2. The moon moves between the Earth and the Sun. (So it blocks the sun's light)

Answer:

b

Explanation:

Answer:

it is j.

Explanation: