Someone can you help me Please urgent

Answer:

A 6.0

Explanation:

Answer:

saturated solution

Explanation:

Nya has a cup of hot tea that she lets cool down for several minutes so effect of cooling on the tea is that its particles have less kinetic energy.

Relation between the kinetic enegy and temperature of any substance will be represented as:

K.E ∝ 3/2kT

From the above realation it is clear that kinetic energy is directly proportional to the temperature of the substance. So when a cup of tea cool down its temperature decreases as a result of which kinetic energy of particles present in cup of tea also decreases.

Specific heat dependence on temperature is very weak as compared to K.E. so it will be negligible.

Hence particles of tea have less kinetic energy.

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Answer:

Its particles have less kinetic energy.

Explanation:

Answer:

im not 100% sure but i think it is :A

Explanation:

Isotopes show similarity in chemical properties, and in exothermic reaction heat is released and in endothermic reaction heat is absorbed.

Chemical reactions are those reactions in which reactants combine with each other for the formation of products.

Hence correct explanations are given above.

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Answer:

1. Top (Chemical)

2. Top (Chemical)

3. Middle (Nuclear)

4. Middle (nuclear)

5. Bottom (Both)

Explanation:

Answer:

See below

Explanation:

.045 liter / 22.4  l / mole   * 6.022 x 10^23 molecules/mole   * 2 atoms/molecule  =

( * 2 becuase nitrogen gas is diatomic)

Based on the periodic table and due to their nonmetallic nature, carbon (C) and oxygen (O) form covalent bonds.

A covalent bond is a type of chemical bond in which elements share electrons. It is formed between nonmetals.

Based on the periodic table, which pair of elements would most likely form a covalent bond?

Based on the periodic table and due to their nonmetallic nature, carbon (C) and oxygen (O) form covalent bonds.

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Answer:

1.4 l

Explanation:

Assuming they are the same temperature

  5/4 = O/1.12

  1.12 * 5/4 = L of O2 = 1.4 l

Answer:

The answer is C and E

Explanation:

I just had that question

Answer:

c and e

Explanation:

Answer:

3.24

Explanation:

It is known that nitric acid is a strong acid, so it will dissociate completely, resulting in [tex]H^+[/tex] and [tex]NO_3^-[/tex] ions being present in solution. We also know that pure water has a neutral pH due to the chemical equilibrium of [tex]H_2O(l)[/tex] ⇄ [tex]H^+(aq) + OH^-(aq)[/tex] signifying equal parts of hydrogen and hydroxide ions.

Now, we must convert from 4.5 moles of nitric acid to moles of hydrogen. This can be accomplished using unit conversions and the chemical dissociation equation [tex]HNO_3(s) - > H^+(aq) + NO_3^-(aq)[/tex]

[tex]4.5molHNO_3 * \frac{1 mol H}{1 mol HNO_3} = 4.5molH+[/tex]

Then, using the pH equation [tex]-log[H+] = pH[/tex] and the formula for molarity [tex]M = \frac{g}{L}[/tex], we can find the value of [tex][H^+][/tex] and in turn the pH of the resulting solution. Keep in mind that both answers for grams of the hydrogen ion and molarity of the hydrogenion should have two significant figures.

[tex]4.5mol H^+ * \frac{1.01gH^+}{1 mol H^+} = 4.6g H^+\\\frac{4.6gH^+}{8000L sol} = 5.8*10^{-4} M H^+[/tex]

Now the pH equation may be used.

[tex]-log(5.8*10^{-4}) = 3.24[/tex]

Note that logarithmic significant figures dictate that the logarithm of a number with x significant figures will result in a value with x digits after the decimal point, meaning that this answer will have two digits after the decimal point and three significant figures.

Answer:

Our differences make us special.

Explanation:

During change of phase, the molecules of a substance acquire enough kinetic energy to overcome the forces of attraction between its molecules.

Change of phase occurs when a substance acquires enough energy to overcome the forces of attraction between its molecules to transition from one state of matter to another.

During a change of phase, kinetic energy of the molecules of the substance increases due to the application of heat, and the freedom of movement of the molecules increases.

Change of phase can occur as follows;

Therefore, during change of phase, the molecules of a substance acquires enough kinetic energy to overcome the forces of attraction between its molecules leading to increased freedom of movement of the molecules.

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Answer:During change of phase, the molecules of a substance acquire enough kinetic energy to overcome the forces of attraction between its molecules.

What is change of phase?

Change of phase occurs when a substance acquires enough energy to overcome the forces of attraction between its molecules to transition from one state of matter to another.

During a change of phase, kinetic energy of the molecules of the substance increases due to the application of heat, and the freedom of movement of the molecules increases.

Change of phase can occur as follows;

from solid to liquid and vice versa

from solid to gas and vice versa

from liquid to gas and vice versa

Therefore, during change of phase, the molecules of a substance acquires enough kinetic energy to overcome the forces of attraction between its molecules leading to increased freedom of movement of the molecules.

Explanation:

A volatile liquid is one that reacts quickly so it transitions easily into the ground energy state phase.

Ground energy state refers to the state in which is achieved by something burning all of it's potential energy, so that it is in equilibrium. As an example, an apple falling to the ground from a tree . this is because until it hits the ground, it has potential or otherwise some form of energy to burn, disturbing it's equilibrium.

Answer:

561 [gr.].

Explanation:

try the option suggested in the attached picture. The answer is underlined with orange colour.

Answer:

The equilibrium concentrations are [N₂O] = 1.00 mol/L; [O₂] = 0.50 mol/L; [NO] = 1.00 mol/L. Kc = 2.0.

Explanation:

First, write the balanced chemical equation with an ICE table.2N₂O + O₂ ⇌ 4NOI/mol·L⁻¹: 0; 0; 3.00C/mol·L⁻¹: +2x; +x; -4xE/mol·L⁻¹: 2x; x; 3.00 - 4xAt equilibrium, [N₂O] = 2x mol/L= 1.00 mol/L.So x = 0.50Then [O₂] = x mol/L = 0.50 mol/Land [NO] = (3.00 - 4x) mol/L = (3.00 – 4×0.50) mol/L = 1.00 mol/LKc=[NO]4[N2O]2[O₂]=1.0041.002×0.50 = 2.0

Answer:

a. a part of ionic bond with Cl

there is no answer to your question because all of the options ARE blood types so there is no telling.

Answer:

Gamma radiation. Explanation: Gamma radiation produces not only the least change in mass and atomic numbers, but produces no change in mass number, atomic number, or electric charge. Both alpha and beta radiation do produce these changes.

Answer:

3.04 atm

Explanation:

First note r is in l*atm/mole*K

PV=nRT

P = nRT/V = 14.3(.0821)(485)/187 = 3.04 atm

Answer:

When too much carbon monoxide is in the air, your body replaces the oxygen in your red blood cells with carbon monoxide.

Explanation:

This can lead to serious tissue damage or even death. As you mentioned.

Answer:

321 g

Explanation

All you need to know here is that the molarity of a solution tells you the number of moles of solute present in exactly

1 L

of the solution.

In your case, a

2.20-M

sodium chloride solution will contain

2.20

moles of sodium chloride, the solute, for every

1 L

of the solution.

So if every

1 L

of this solution must contain

2.20

moles of sodium chloride in order for the solution to have a molarity of

2.20 M

, it means that

2.50 L

of this solution must contain

2.50

L solution

⋅

2.20 moles NaCl

1

L solution

=

5.50 moles NaCl

To convert the number of moles of sodium chloride to grams, use the molar mass of the compound.

5.50

moles NaCl

⋅

58.4 g

1

mole NaCl

=

321 g

−−−−−

The answer is rounded to three sig figs.

Mass defect is define as the difference between nuclear mass and the mass of its components.

As the name suggested that defect in mass of any substance given idea about the mass defect and it will be define as the difference between the atomic mass of an atom and sum of the masses of all constitute particles present inside the nucleus.

Hence it is the difference between nuclear mass and the mass of its

components.

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Answer:

bent; two; two.

Explanation:

Based on the chemical formula, the water molecule is consists of 2 Hydrogen atoms and one Oxygen atom.

The water molecule has a bent geometry because it's central atom has two bonds and two lone pairs of electrons.

Answer:

The main difference between trans fat and saturated fat is that trans fat raises low-density lipoprotein (LDL) levels and drops high-density lipoprotein (HDL) levels in the blood whereas saturated fat raises both LDL and HDL levels in the blood.

Explanation:

Stay safe fam :)

Answer:

law of conservation of mass

Explanation:

The law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products.

Answer: (D) Relative Distance

Explanation:

.