Using the rules of electron configurations is this a valid orbital diagram?

Answer: 1 mole nitrogen produces 2 moles ammonia

How many moles you need for 155 mol ammonia?

155/2 moles

Explanation:

Answer:

2 FeCl2 + Cl2 -> 2 FeCl3

According to numbers in reaction

Amount of Cl2 is half of FeCl2

Explanation:

The statement  which is false about Bohr's model is option C, "an electron's path is not known exactly". Electron's path can be determined using the knowledge of different energy levels.

Energy levels in an atom is circular paths having fixed energy through which the electrons are revolving around the nucleus. This model of atom was proposed by Niels Bohr.

According to Bohr's atomic model, electrons are revolving through fixed energy levels around the nucleus, where the velocity and momentum of electron and the radius of the atom can be determined using the model.

Bohr's model of atom contributed well to the atomic structure and helped to determine the energy of electronic transitions.

Hence, the statement an electron's path is not known is false.

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Answer:

As KBr

is producing lesser moles of product so, KBr

is limiting reactant and produced potassium chloride=

187.74g

Answer: 2Cr + 3Br2 Yields 3CrBr3

Explanation:

We know that 4a is not balanced because there are 3 Nitrogen atoms on the reactants side and 2 on the products side.

We know that 4c is not balanced because there are 4 Chlorine atoms on the reactants side and 2 on the products side. (Remember there are 2 Cl2 atoms. Therefore, 2 times 2 means there are 4 Chlorine atoms on the reactants side)

Finally, we know the answer is not 4d because there is 1 Potassium on the reactants side and 2 potassiums on the products side.

Therefore, the answer must be 4b, which contains 2 Chromium atoms and 6 bromine atoms on each side

Answer: Acids have a pH of less than 7 and generally form [tex]H^+[/tex] when dissolved in solution. [tex]H_2SO_4[/tex] is an example of acid.

Bases  have a pH of more than 7 and generally form [tex]OH^-[/tex] when dissolved in solution. [tex]Ca(OH)_2[/tex] is an example of base.

Water is neutral and has a pH of  exactly 7. Therefore in chemical equations it can act as acid or a base.

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.  pH is calculated by taking negative logarithm of hydrogen ion concentration.

[tex]pH=-\log [H^+][/tex]

pH values range from 1 to 14. Acids have a pH range from 1 to 6.9, water is neutral with pH of 7 and bases have pH ranging from 7.1 to 14.

Acids form hydrogen ions when dissolved in water and bases form hydroxide ions when dissolved in water. Water [tex]H_2O)[/tex] is amphoteric and thus can behave as an acid or a base.

[tex]H_2SO_4\rightarrow 2H^++SO_4^{2-}[/tex]

[tex]Ca(OH)_2\rightarrow Ca^{2+}+2OH^[/tex]

Answer:

the mirror forms a virtual inlarged image

Explanation:

The addition or subtraction of thermal energy. For example if you heat up an ice cube, it will melt to become water. If you heat it even more, it will evaporate.

Answer:

https://download.cnet.com/1-Click-Answers/3000-2378_4-10060189.html

Explanation:

Answer:

6.022x10^23 atoms of Ca

Explanation:

Answer:

yes you do so you know how strong it is how maluble it's is so it can be customised to it's specific use

Answer:

alloy's properties are usually different from those of its component elements. Alloy constituents are usually measured by mass. Unlike pure metals, most alloys do not have a single melting point; rather, they have a melting range in which the substance is a mixture of solid and liquid.

Alloy steels have a wide range of special properties, such as hardness, toughness, corrosion resistance, magnetizability, and ductility. Nonferrous alloys, mainly copper–nickel, bronze, and aluminum alloys, are much used in coinage.

Pure metals are useful but their applications are often limited to each individual metal's properties. Alloys allow metal mixtures that have increased resistance to oxidation, increased strength, conductivity, and melting point; Essentially any property can be manipulated by adjusting alloy concentrations.

dnt learn all thr properties.

these are the main properties..u can learn thse only. hope it will help u

Answer:

The definition of chemistry is a branch of science that deals with the form and properties of matter and substances or the interaction between individuals.

Answer:

from plants and animals.

Answer:

I don't think there is any metal matches with this condition

Answer:

C

Explanation:

If I am not mistaken, due to the conservation of mass, whatever mass is on the side of the reactants should be the same for the product side.

This means

218.76g+53.96g = 272.72g

272.72g-266.66g = 6.06g

So the answer should be C

Answer:

A. A concept in geology that describes transitions and relationships among the tree main rock types.

D. A series of processes that create and transform the types of rocks in the Earth’s crust.

Explanation:

A and D are the best two answers from the choices below because they both correctly describe the rock cycle.

The rock cycle which according to Wikipedia is a basic concept in geology that describes transitions through geologic time among the three main types of rock;

1. Sedimentary,

2. Metamorphic and

3. Igneous rocks

A rock cycle can take very long time. It could be thousands or millions of years

Answer:

An example of a metal that rusts is Iron

Answer:

Iron

Explanation:

The metal that forms 2 types in moisture is iron.

Answer:

TTC-GGT-ACT-TGT I could be wrong because A could eather be considered a U or a T, but u could also use UUC-GGU-ACU-UGU

Answer:

Explanation:

Hygrometer, instrument used in meteorological science to measure the humidity, or amount of water vapour in the air. Several major types of hygrometers are used to measure humidity.

The expected mass of copper element after 24 hours as per graph is 288 grams.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.In every 10 minutes  2 mg of copper is produced thus after 24 hours that is 1440 minutes copper amount will be 1440×2/10=288 mg.

Thus, the expected mass of copper element after 24 hours as per graph is 288 grams.

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Answer:

Otherwise, positive charge means that the element lost an electron and negative charge means it gained an electron. (3) The atomic mass is equal to the sum of the number of protons and number of neutrons. An atom of the calcium-40 isotope has 20 neutrons in its nucleus.

Answer:

The pH scale 7 indicates neutral.

Explanation:

Answer:

I think its A-When the car is cruising straight down a highway

Answer:

Answer is C

Explanation:

the valency of sulphur is 2 ans sodium is 1

by crossing it forms NA2S

Answer:

The new temperature is 19.072 K.

Explanation:

Charles's Law consists of the relationship that exists between the volume and the temperature of a certain quantity of ideal gas, which is maintained at a constant pressure. This law says that as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases because the temperature is directly related to the energy of the movement of the gas molecules.

In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:

[tex]\frac{V}{T}=k[/tex]

Assuming that a certain volume of gas V1 that is at a temperature T1 at the beginning of the experiment varies up to a volume of gas V2, then the temperature will change to T2, and it will be true:

[tex]\frac{V1}{T1}=\frac{V2}{T2}[/tex]

In this case:

Replacing:

[tex]\frac{500 mL}{298 K}=\frac{32 mL}{T2}[/tex]

Solving:

[tex]T2=32 mL*\frac{298 K}{500 mL}[/tex]

T2= 19.072 K

The new temperature is 19.072 K.