CHEMISTRY HIGH SCHOOL

The bonds in BaO are best described ascovalent, because valence electrons are shared
covalent, because valence electrons are transferred
ionic, because valence electrons are shared
ionic, because valence electrons are transferred

Answers

Answer 1
Answer: In order to determine whether a bond is ionic or covalent, you need to know whether or not it is completely composed of nonmetal atoms or both metal and nonmetal ions.

Barium is a metal and Oxygen is a nonmetal, therefore there is no possible way they could bond unless they were attracted to opposite charges. Specifically, only if Barium becomes a cation and Oxygen becomes an anion then could they bond.

Now cation and anion both have the word "ion" in them, so therefore it must be an ionic bond.

Now we need to know the definition of a bond. A bond is formed when two elements are joined together by sharing their valence electrons.

Therefore, your answer should be:

Ionic, because valence electrons are shared.

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If 6.49 mol of ethane (C2H6) undergo combustion according to the unbalanced equationC2H6 + O2 −→ CO2 + H2O ,how many moles of O2 is required?1. 27.792. 7.633. 8.44. 25.485. 12.6356. 21.0357. 23.88. 19.049. 22.71510. 26.775Answer in units of mol.
Compared with saturated hydrocarbons, an unsaturated carbon has _____ ratio of hydrogen atoms to carbon atoms.
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Based on the law of Conservation of Mass, what happens to the mass of a substance in a chemical change? A: the mass is always conserved B: The mass is either created or destroyed C: the reactant always has more mass D: the product always has more mass

Answers

Answer:

A.

Explanation:

The amount of mass always stays the same, matter cannot be created nor destroyed, it can only change forms. Thus, the answer is A.  

In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. Also, the number of atoms in a reaction remains the same. Mass cannot be created or destroyed in a chemical reaction.

I hope this helps..

What is the gram molecular mass of a compound if 5 moles of the compound has a mass of 100 grams?

Answers

Answer:

1 gram molecular mass of this compound = 20

Explanation:

Gram Molecular Mass is the mass of a chemical that is obtained by the number of grams in the chemical determined by the masses obtained from the periodic table and the number of mols determined from the Chemical formula.

That's quite a mouthful. Here's what it means in plain language.

Find the Gram molecular mass of C2H6

The periodic table tells us that 1 mol of C2H6 has

2 mols of Carbon which is 2*C or 2 * 12 = 24 and

6 mols of Hydrogen which is 6*H or 6*1 =  6

The gram molecular mass is 6 + 24 = 30

Your question doesn't require all that background.

5 gram molecular masses = 100 grams       Given

1 gram molecular mass   = x

5/1 = 100/x          Cross multiply

5x = 100             Divide by 5

x = 100 / 5

x = 20

                 

The gram molecular mass of a compound whose 5 moles has a mass of 100 grams would be 20 grams per mole.

The gram molecular mass of a substance is simply the mass (in gram) of 1 mole of the same substance. In other words, the gram molecular mass of a substance is also the same as the molar mass of the substance.

In this case, 5 moles of the substance weigh 100 grams

Therefore, 1 mole of the same substance would weigh:

                     1 x 100/5 = 20 grams

More on the gram molecular mass can be found here: brainly.com/question/11865839

What is the mass, in grams, of 6.82 L of nitrogen monoxide at STP? R = 0.0821 L atm / mol K

Answers

Answer: 9.13g NO

Explanation:

First, I list what I know, which is the values of STP, the volume, the constant R, and the molar mass of NO; I also include what I'm looking for, which is n, the number of moles of NO.

STP = 273.15K, 1 atm

P = 1 atm

V = 6.82L

R = 0.0821 L*atm/mol*K

T = 273.15K

n = ?

NO mass: 30.01 g/mol

Then, I use the ideal gas law, PV = nRT, to find the number of moles of NO:

(1 atm)(6.82 L) = n((0.0821 L*atm)/(mol*K))(273.15K)
(1 atm)(6.82 L) = n((22.43 L*atm)/(mol))
(1 atm)(6.82 L) / ((22.43 L*atm)/(mol)) = n       => divided both sides by 22.4L*atm/mol
n = 0.304 mol NO

Then, I use the molar mass of NO, 30.01 g/mol, to convert from mol NO to g NO:

g NO = 0.304 mol NO((30.01g NO)/(mol NO))
         = 9.13 g NO

I hope this helps! :)

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

During fission, _____. protons collide to create uranium-235 new elements are created when uranium breaks apart hydrogen atoms are fused together to create helium helium atoms are fused together to create hydrogen

Answers

The correct answer is the second option. During fission, new elements are created when uranium breaks apart. This takes place in any of the heavy nuclei after capture of a neutron. This is the opposite of nuclear fusion. In this case, nuclei are broken down into two.

Answer:

B. new elements are created when uranium breaks apart

Explanation:

Match the following definition to the type of solution it describes. unsaturated solution
saturated solution
supersaturated solution

A.
The amount of solute dissolved is less that the maximum amount the solution can hold.
B.
The amount of solute dissolved is the maximum amount the solution can hold.
C.
The amount of solute dissolved is more than the usual maximum amount.

Answers

The following definition to the type of solution it describes are

unsaturated solution: A. The amount of solute dissolved is less that the maximum amount the solution can hold.
saturated solution: B. The amount of solute dissolved is the maximum amount the solution can hold.

supersaturated solution: C. The amount of solute dissolved is more than the usual maximum amount.
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