A proton has _______ charge.

Answer:

Inorganic chemical reactions involve compounds without carbon atoms. Some of these chemical reactions emit light as the chemical compounds react. When light is emitted as a result of the chemical reaction, the reaction is said to be luminescent.

Explanation:

Answer:

Chemiluminescence is the production of light from a chemical reaction. Two chemicals react to form an excited (high-energy) intermediate, which breaks down releasing some of its energy as photons of light

Answer:

3

Explanation:

0's aren't one of the significant figures. so it would just be 3.

Hope this helps!!!

Answer:

3

Explanation:

In multiplication you count the least amount of significant figures. All digits other than leading 0's. If zeros are after, they count as significant.

Answer: Because it's a combination of chemicals, vodka doesn't freeze at the same temperature as either water or alcohol. Of course, vodka will freeze, but not at the temperature of an ordinary freezer. This is because vodka contains enough alcohol to lower the freezing point of water below the -17°C of your typical freezer.

Explanation: .......

Answer:

newtons 3rd law

Explanation:

if the engine is supplying propulsion, then the mass will be pushed by it.

Answer:

Explanation:

The first attached diagram shows the proposed phenol that is being treated with KOH to form Oxonine (CₐHₐO).

Reaction of Arylhalide after treatment with KOH lead to the displacement of Bromine atom with the hydrogen from the hydroxyl (OH) substituent , then  forming HBr  , leaving the oxy (-O) atom  alone to form an Oxonine compound.

Therefore the propose structure for the product (Oxonine) CₐHₐO is shown in the second diagram attached below.

Answer: the train was going 25 mph

Explanation: 100 divided by 4 is 25

Answer:

the train traveled 25 Miles per hour

Explanation:

100 divided by 4 is 25

Explanation:

Avogadro's number. What can be said about 1 mol Ag and 1 mol Au? ... They contain the same number of atoms.

1 mole of Ag and 1 mole of Au contain the same number of particle. Therefore, option B is correct.

The International System of Units uses the mole (symbol: mol) as the unit of material quantity. How many elementary entities of a particular substance are present in an object or sample is determined by the quantity of that material. It is specified that the mole contains exactly 6.022140761023 elementary entities.

A mole is defined as the mass of a substance that has the same number of elementary particles as there are atoms in precisely 12.000 g of 12C.

In the periodic chart, group 11 includes the chemical elements roentgenium (Rg), copper (Cu), silver (Ag), and gold (Au). However, no chemical tests have yet been done to demonstrate that roentgenium behaves similarly to the heavier homologue of gold.

Thus, option B is correct.

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Answer:

Cs > Ba > Bi > Hf > Ta

Explanation:

The atomic radius of a chemical element defined as the distance between nucleus and electron from the center.

The atomic number and atomic radius of given elements are:

Barium (Ba):

Atomic number - (56)

Atomic radius -  268 pm

Caesium (Cs)

Atomic number - 55

Atomic radius -  343 pm

Hafnium (Hf):

Atomic number - 72

Atomic radius -  225 pm

Bismuth (Bi):

Atomic number - 83

Atomic radius -  230

Tantalum (Ta):

Atomic number - 73

Atomic radius -  220 pm

According to the given atomic radius the decreasing order of atomic radius is Cs > Ba > Bi > Hf > Ta.

Caesium has highest atomic radius among all even though lowest atomic number because the force of attraction between the nucleus and the outermost electron is low and outermost electron are loosely held.

Barium (Ba) has lower atomic number than Bismuth (Bi) but still atomic radius of Barium is high because moving across the periodic table atomic radius decreases as force of attraction between nucleus and outer electrons is high.

Bismuth (Bi) has higher atomic number that Hafnium (Hf), atomic radius of Bi is more than Hf.

Tantalum (Ta) have higher atomic number than Hafnium (Hf) but still have lower atomic radius as as force of attraction between nucleus and outer electrons is high.

Hence, the decreasing atomic radius is Cs > Ba > Bi > Hf > Ta.

Answer: Yes we agree with the student's claim.

Explanation:

When the molecules are present in smaller size, more reactants can react as decreasing the size increases the surface area of the reactants which will enhance the contact of molecules.Hence, more products will form leading to increased rate of reaction.

On increasing the temperature will make more reactant molecules will have sufficient energies to cross the energy barrier and thus the number of effective collisions increases, thus leading to more products and increased rate of reaction.

When the solution is stirred , the molecule's kinetic energy and thus the rate of reaction increases.

Thus smaller size, stirring and increase of temperature will make the solution quickly.

Answer:

habitat change, climate change, invasive species, and pollution

Explanation:

Answer:

I’m looking for an answer aswell

Explanation:

Answer:

5 is the answer since I did this and got it rigt

Answer:

18 g...i think 90 percent sure its 18

Answer:

When an acid and a base react with each other, a neutralization reaction occurs, forming a salt and water. The water forms from the combination of the H + ions from the acid and the OH - ions from the base. Strong acids and strong bases completely dissociate, so the reaction yields a solution with a neutral pH (pH = 7).

Explanation:

Answer:

2J/g°C

Explanation:

Q = 5000J

Initial temperature (T1) = 20°C

Final temperature (T2) = 70°C

Specific heat capacity (c) = ?

Heat energy (Q) = mc∇T

Q = mc∇T

Q = mc(T2 - T1)

5000 = 50 × c × (70 - 20)

5000 = 50c × 50

5000 = 2500c

c = 5000 / 2500

c = 2J/g°C

The specific heat capacity of the substance is 2J/g°C

Iodine-131  is a radioactive element  which keeps on decaying over the time. Decay of radioactive element always comes under first order kinetics. Therefore 16.2mg mass would be available after 48 days if a hospital has a 750mg sample of it available.

Half life tells about the time at which the radioactive material decays to half of its initial concentration.

Mathematically, for first order reaction, the relationship between half life and rate constant can be given as

[tex]t_{1/2} = \frac{0.693}{K}[/tex]

where k = rate constant

[tex]t_{1/2} \\[/tex]= half life= 8 days

Substituting the given values

k=0.693÷8 =0.08days⁻¹

[tex]k=\frac{2.303}{t}log\frac{a}{a-x}[/tex]

a= initial concentration

a-x = final concentration after 48 days

[tex]0.08=\frac{2.303}{48 }log\frac{ 750}{a-x}[/tex]

solving this we get

a-x= 16.2mg

Therefore, 16.2mg mass would be available after 48 days if a hospital has a 750mg sample of it available.

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Answer:

Exothermic reaction

Explanation:

It is an exothermic reaction i.e. energy is released during the reaction.

Answer: 64

:))))))))))))

Answer:

Electrical

There are five types of kinetic energy: radiant, thermal, sound, electrical and mechanical.

When solid surfaces slide over each other, the kind of friction that occurs is called Sliding Friction.

Explanation:

Barium reacts readily with water to form barium hydroxide, Ba(OH)2 and hydrogen gas (H2).

Answer:

Paratroopers not hurt while landing because when they get to the ground, they keep their knees and feet together helping them to land properly.

hope it helps!

Answer:

they usually land on their knees and roll

Explanation:

Answer:

C. It is nonspontaneous and requires an electric current.

Explanation:

Electroplating refers to the process of coating a metal on the surface of another metal. Electroplating may be carried out to improve the properties of a metal or to preserve it from corrosion.

Electroplating involve the process of electrolysis. In electrolytic cells, electrical energy causes nonspontaneous reactions to occur in a process known as electrolysis. Electrolytes are decomposed during electrolysis by the passage of direct current to form ions.

The entire process of electrolysis is non spontaneous. It requires the input of electric electric current. This is achieved by connecting a battery to supply energy to drive the non spontaneous process.

Answer:A unit rate describes how many units of the first type of quantity corresponds to one unit of the second type of quantity. Some common unit rates are miles (or kilometers) per hour, cost per item, earnings per week, etc.

Explanation: hope this helps mark as brainiest

Answer:

3.46

Explanation:

-log(3.50*10^-4) = 3.46

Answer:

H2

Explanation:

Hydrogen gas isn't a compound but it is diatomic when found naturally hence the 2

Answer: It turns the blue litmus paper to red.

Explanation: A blue litmus paper deeped in a solution of HCl will turn to red, indicating the presence of H+ or H30+, and telling us the solution is an acid.

Answer:

C. It is nonspontaneous and requires an electric current.

Explanation:

An oxidation-reduction (redox) reaction is a type of chemical reaction in which electrons are transferred between chemical species. In redox reactions,  a reduced half and an oxidized half occur together. When an object is electroplated, the occurrence of a redox reaction is nonspontaneous and it requires an electric current.

Answer:

D. decreased biodiversity

Explanation:

Habitat loss due to the increasing human

population has caused decreased biodiversity

Answer:

400000

Explanation:

First, figure out what 10^5 is. It is 100000. Then multiply it by 4 and there is your answer!

Also if it is 4x10^-5, it is 0.00004!

Oh yeah! If you want it to be in scientific notation, it is: 4x10^5

Since that I didn't quite understand what you are trying to question, it is either 4x10^5 or 4x10^-5!