CHEMISTRY HIGH SCHOOL

Using the following phase diagram, the area labeled A is in what phase?Solid

Liquid

Gas

Answers

Answer 1
Answer: Using the following phase diagram, the area labeled A is in what phase?Using the following phase diagram, the area labeled A is in the liquid phase.

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2Na + 2H2O mc012-1.jpg 2NaOH+H2, what mass of Na is required to yield 22.4 L of H2 at STP? (The atomic mass of Na is 22.99 u.)

A 1. 00 L volume of HCl reacted completely with 2. 00 L of 1. 50 M Ca(OH)2 according to the balanced chemical equation below. 2HCl Ca(OH)2 Right arrow. CaCl2 2H2O What was the molarity of the HCl solution? 0. 375 M 1. 50 M 3. 00 M 6. 00 M.

Answers

Answer:

The first step is to find the number of moles of OH⁻ that reacted with the HCl.  To do this multiply 2.00L by 1.50M to get 3 moles of Ca(OH)₂.  Then you multiply 3 by 2 (there are 2 moles of OH⁻ per every 1 mole of Ca(OH)₂) to get 6 moles of OH⁻.  That means that you needed 6 moles of HCl since 1 mole of HCl contains 1 mole of H⁺ and equal amounts H⁺ and OH⁻ reacted with each other.  To find the molarity of the HCl solution you need to divide 6mol by 1L to get 6M.  Tat means that the concentration of the acid was 6M.

I hope this helps.  Let me know if anything was unclear.

Explanation:

What are the effects of baking powder solution on dilute hydrochloric acid solution

Answers

Combining an acid with a base typically results in water and salt. In some cases, these reactions release gas and heat as well. Mixing baking soda, or NaHCO3, with hydrochloric acid, or HCl, results in table salt, NaCl, as well as water, H2O, and carbon dioxide, CO2.
:)

Chemistry Questions 3. What is true of a strong acid? A. It ionizes close to 100% in water B. It is a weak electrolyte C. It does not conduct electricity in solution D. It always has a high concentration 4. What substance is acting as the Bronsted-Lowry base in the forward reaction below? H2O + HCl --> H3O+ + Cl- A. H3O+ B. Cl- C. H2O D. HCl 5. Which of the following is NOT an acid-base neutralization reaction? A. NH3 + HCl --> NH4Cl B. NaOH + CH3COOH --> Na CH3COO + H2O C. 2 HNO3 + Ca(OH)2 --> Ca(NO3)2 + 2 H2O D. H2SO4 + 2 NaCl --> 2 HCl + Na2SO4

Answers

Answer:

For 3: The correct answer is Option A.

For 4: The correct answer is Option C.

For 5: The correct answer is Option D.

Explanation:

  • For 3:

There are 2 types of solutions on the basis of pH.

An acid is defined as the chemical substance which looses hydrogen ions in a solution.

A weak acid does not completely dissociates into its ions but a strong acid completely dissociates into its ions when dissolved in water.

A base is defined as the chemical substance which looses hydroxide ions in a solution.

A weak base does not completely dissociates into its ions but a strong base completely dissociates into its ions when dissolved in water.

Hence, the correct answer is Option A.

  • For 4:

According to the Bronsted Lowry conjugate acid-base theory, an acid is defined as a substance which donates protons and a base is defined as a substance which accepts protons.

For the given chemical equation:

H_2O+HCl\rightarrow H_3O^++Cl^-

H_2O is considered as a bronsted-lowry base because it is accepting hydrogen ion to form hydronium ion

HCl is considered as a bronsted-lowry acid because it is donating hydrogen ion to form chloride ion.

Hence, the correct answer is Option C.

  • For 5:

Neutralization reaction is defined as the chemical reaction in which an acid reacts with a base to produce a salt and water molecule.

HX+BOH\rightarrow BX+H_2O

For the given options:

Option A:

The chemical equation follows:

NH_3+HCl\rightarrow NH_4Cl

This is an example of neutralization reaction because ammonia is considered as a base and when it reacts with HCl, it leads to the production of salt.

Option B:

The chemical equation follows:

NaOH+CH_3COOH\rightarrow CH_3COONa+H_2O

This is an example of neutralization reaction.

Option C:

The chemical equation follows:

2HNO_3+Ca(OH)_2\rightarrow Ca(NO_3)_2+2H_2O

This is an example of neutralization reaction.

Option D:

The chemical equation follows:

H_2SO_4+2NaCl\rightarrow 2HCl+Na_2SO_4

This is an example of double displacement reaction.

Hence, the correct answer is Option D.

Strong acid does not conduct electricity. Question 4} A. H30  Question 5 } B. NaOH + CH3COOH

What is the KE of a 4kg mass, moving at 3m/sec?

Answers

Answer:

The kinetic energy of a 4 kg mass moving at 3 m/s is 18 joules.

Explanation:

The kinetic energy (KE) of an object is calculated using the following formula: (image inserted)

Where:

KE: is the kinetic energy

m: is the mass of the object

v: is the velocity of the object

In your case, the mass (m) is 4 kg, and the velocity (v) is 3 m/s. Plugging these values into the formula.

The unit of kinetic energy is the joule (J), which is equivalent to a kg m^2/s^2. So:

KE = 18 J

Helppp meee plzzz plzzzz
Helppp

Answers

Answer:F =MAX

Explanation:I did that

Answer:

F=MAX

Explanation:

I DID THAT TODAY AT 9:05AM FRIDAY 1/22/2021    

The four tastes are:
bitter
sour
fishy
salty
fruity
sweet

Answers

bitter, sour, salty, sweet.
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