CHEMISTRY HIGH SCHOOL

When using the ideal gas constant value, R = 0.0821, in an ideal gas law calculation, the units of temperature may be expressed as degrees Celsius or Kelvin.TRUE

FALSE

Answers

Answer 1
Answer: The statement "When using the ideal gas constant value, R = 0.0821, in an ideal gas law calculation, the units of temperature may be expressed as degrees Celsius or Kelvin" is false. It must be Kelvin only not celsius
Answer 2
Answer:

Answer: False

False

Explanation:

False

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Energy + 6CO2 + 6H2O → 6O2 + C6H12O6 The purpose of photosynthesis is to produce usable chemical energy or glucose from solar energy. If the formula for glucose is C6H12O6, how many atoms of carbon are used to produce the glucose?A) 1B) 2 C) 6 D) 9
What type of bond is formed between cobalt and sulfur? (covalent or ionic?)
Based on intermolecular forces, which of these substances would have the highest boiling point?(1) He (3) CH4(2) O2 (4) NH3
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Is salt always soluble is water?

Answers

For example, salts of sodium, potassium and ammonium are usually soluble in water. Notable exceptions include ammonium hexachloroplatinate and potassium cobaltinitrite. Most nitrates and many sulfates are water-soluble

Answer:

Many ionic compounds exhibit significant solubility in water or other polar solvents. Unlike molecular compounds, salts dissociate in solution into anionic and cationic components. For example, salts of sodium, potassium and ammonium are usually soluble in water.

Explanation:

Hope this helps

The process of splitting an atom into two lighter atoms is called A. nuclear disintegration.
B. nuclear separation.
C. nuclear fission.
D. nuclear fusion.

Answers

Answer is: C. nuclear fission.

Nuclear fission is a nuclear reaction or a radioactive decay where nucleus of atom split into smaller ligher nuclei.

Nuclear fission is exothermic reaction which release large amounts of energy (electromagnetic radiation or as kinetic energy, which heat reactors where fission reaction take place).

Answer: The process of splitting of an atom into two lighter atoms is called is called nuclear fission.

Explanation:

There are two types of nuclear decay reactions:

  • Nuclear fission reactions: They are defined as the reaction in which, the heavier atoms splits into two or more lighter atoms. The number of atoms formed in this reaction increases from the given atoms.
  • Nuclear fusion reactions: They are defined as the reaction in which, two or more lighter atoms combine to form a heavier atom. The number of atoms formed in this reaction decreases from the given atoms.

Hence, the process of splitting of an atom into two lighter atoms is called is called nuclear fission.

A major function of your nose is cleaning the air you breathe.
True
False

Answers

Answer:

It's true I got it wrong.

Explanation:

Given the reaction:Mg(s) + 2 AgNO3(aq)--> Mg(NO3)2(aq) + 2 Ag(s)
Which type of reaction is represented?
(1) single replacement (3) synthesis
(2) double replacement (4) decomposition

Answers

Answer: (1) single replacement

Explanation:

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.Thus magnesium can easily lose electrons as compared to silver and result in the formation of magnesium nitrate and silver.

Mg(s)+2AgNO_3(aq)\rightarrow Mg(NO_3)_2(aq)+2Ag(s)

Double displacement is a chemical reaction in which ion exchange takes place.

Synthesis reaction is a chemical reaction in which two reactants combine to give a single product.

Decomposition is a chemical reaction in which one substance decompose to give two or more than two products.
reaction: Mg(s) + 2 AgNO3(aq) → Mg(NO3)2(aq) + 2 Ag(s)
Which type of reaction is represented?

double replacement



double replacement a bimolecular process involving the exchange of bonds between the two reacting chemical species, which
results in the creation of products with
similar or identical bonding affiliations.
To illustrate, consider two chemical species, AB and CD, which react to give AD and CB:

AB + CD → AD + CB

Select all that apply. Marie and Pierre Curie's discoveries included: X-rays uranium radium pitchblende polonium

Answers

Marie and Pierre Curie's discoveries included: Polonium and Radium. Marie Curie's death involved her long-term exposure to radiation. I hope this answer helps you on your assignment.

Answer;

  • Radium
  • Polonium

Explanation;

  • Pierre and Marie are known for their work in the study of radioactivity that led to the discoveries of new radioactive elements radium and polonium.
  • Radium element was named after the Latin word ray and Polonium was named after Marie's home country, Poland.
  • Element radium was discovered in the form of radium chloride, that was extracted from uraninite.

Rank cesium, chlorine, and chromium in order of increasing electron affinityA) Cs < Cr < Cl
B) Cl < Cr < Ce
C) Ce < Cl < Co
D) Ca < Cu < Cl

Answers

The correct answer is A. Cesium has the lowest electron affinity among the three while Chlorine has the highest. 
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