Which molecule, when added to a solution, would give the solution the highest pH?HCl
H2SO4
KOH
H2O

Answer: The correct answer is

Explanation:

Synthesis reaction is defined as the reaction in which two smaller substances combine together to form a large single compound.

From the given options:

Option A:  

This is a synthesis reaction and only one product is forming.

Option B:  

This is a decomposition reaction.

Option C:  

This is a decomposition reaction.

Option D:  

This is a single displacement reaction.

Thus, the correct answer is

Final answer:

A synthesis reaction is a chemical reaction in which two or more substances combine to form a single, more complex substance. The correct synthesis reaction from the given options is 2H2 + O2 → 2H2O.

Explanation:

A synthesis reaction is a chemical reaction in which two or more substances combine to form a single, more complex substance.

In the given options:

• 2H2 + O2 → 2H2O is a combination reaction (synthesis) as hydrogen and oxygen combine to form water.
• 2H2O2 → 2H2O + O2 is a decomposition reaction as hydrogen peroxide breaks down into water and oxygen.
• CaCO3 → CaO + CO2 is a decomposition reaction as calcium carbonate decomposes into calcium oxide and carbon dioxide.
• 2AgNO3 + Zn → 2Ag + Zn(NO3)2 is a single displacement reaction as silver nitrate reacts with zinc to form silver and zinc nitrate.

Therefore, the correct answer is

2H2 + O2 → 2H2O

.

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(4) the same quantity of charge and the opposite sign

Further Explanation

Protons, neutrons, and electrons are generally called subatomic particles. They are important components for building atoms. Each atom has a different number of protons, neutrons, and electrons. And ask how the atom maintains its identity and uniqueness. They have different charges and different masses. Also, the role of each subatomic particle is very different from each other. The main difference between Protons, Neutrons, and Electrons can be found in the charge. Protons are positively charged and neutrons are neutral while electrons are negatively charged.

Protons are positively charged. The charge, in this case, is determined by the number of coulombic charges an electron has. The charge of a proton is the same as loading an electron and, approved, can be expressed as 1e. (1e = 1,602 * 10 ^ (- 19) C).

Protons, along with neutrons, are called "nucleons." There are one or more protons in each atom. The number of protons is different in each atom and makes the identity of the atom. When elements are grouped together in a periodic table, the number of protons is used as the atomic number of the element.

Electrons are the third type of subatomic particles, and they are found to orbit around the nucleus in discrete energy levels with discrete. Just like the number of protons, the number of electrons in an atom which carries the identity of each element. The way electrons are published in each element is expressed by their electronic configuration. The number of electrons is similar to the number of protons found in an element. The electron is symbolized as 'e.' Electrons are the only subatomic particles that take part in chemical reactions. They also take part in certain reproductive reactions.

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Details

Grade:  high school

Subject:  chemistry

keywords: proton, electron.

Answer: The correct option is (3).

Explanation:

An equilibrium in a reversible chemical reaction is a state in which concentration of reactants and products do not change with time. At equilibrium the rate of forward reaction is equal to the rate of backward reaction.

So, from the given statements the correct statement describing the given system at equilibrium is statement numbered '3'

A chemist places a flask containing the reactant in an ice bath. This will decrease the rate of reaction.

Answer:

give them brainliest

Explanation:

Answer : The correct option is, (C)

Explanation :

A.

This is synthesis reaction in which the two or more reactant react to give a single product.

B.

This is combination reaction in which the two reactants combine to form a single product.

C.

This is a neutralization reaction in which an acid react with a base to give a salt and water as a product.

D.

This is a double displacement reaction in which the positive cation and negative anion of two reactants exchange their places to give two new products.

Hence, the reaction (C) is a neutralization reaction.

Answer:

                   Rubidium (Rb)

Explanation:

                           Ionization Energy is defined as, "the minimum energy required to knock out or remove the valence electron from valence shell of an atom".

Trends in Periodic table:

               Along Periods:

                                        Ionization Energy increases from left to right along the periods because moving from left to right in the same period the number of protons (atomic number) increases but the number of shells remain constant hence, resulting in strong nuclear interactions and electrons are more attracted to nucleus hence, requires more energy to knock them out.

              Along Groups:

                                        Ionization energy decreases from top to bottom along the groups because the number of shells increases and the distance between nucleus and valence electrons also increases along with increase in shielding effect provided by core electrons. Therefore, the valence electrons experience less nuclear attraction and are easily removed.

Conclusion:

                   Given elements belong to same group hence, Rubidium present at the bottom of remaining elements will have least ionization energy due to facts explained in trends of groups above.