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chubhunter [2.5K]
2 years ago
13

A barium atom attains a stable electron configuration when it bonds with?

Chemistry
1 answer:
adell [148]2 years ago
6 0
The answer is B. two chlorine atoms.
The chemical formula of the compound is BaCl2~

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Fill In The Blanks:
yawa3891 [41]

Answers : Fill in the blanks.


Answer 1) During a chemical reaction, the sum of the masses of the reactants and products remain unchanged.


In a reaction masses of the reactants and products always remains the same.


Answer 2) In a pure chemical compound, elements are always present in a definite proportion by mass.


It is observed that in a chemical reaction the elements are found in definite proportion by mass.


Answer 3) Clusters of atoms that act as an ion are called polyatomic ions.


Polyatomic ions are those ions which consits of atoms more than two in their molecule.


Answer 4) In ionic compounds, the charge on each ion is used to determine the chemical formula of the compound.


The charges on the molecule helps to determine the chemical formula of any compound.


Answer 5) The Avogadro constant 6.022 X 10^{23} is defined as the number of atoms in exactly 12 g of carbon-12


Avogadro used carbon-12 as the standard reference element fpr determining its molecules.


Answer 6) Mass of 1 mole of a substance is called its molar mass or molecular weight.


A molecular weight of an atom to define its number of moles.


Answer 7) The abbreviation used for length names of elements are termed as their Symbols.


The abbreviation used for the length of names of elements are called as symbols.


Answer 8) A chemical formula is also known as a true formula or molecular formula.


The term chemical formula determines the number of chemical components present in it.

Answer 9) Those ions which are formed from single atoms are called monoatomic ions.


The ions made up from single atoms are called as monoatomic ions.


Answer 10) Ionic compounds are formed by the combination between metal and nonmetal.


The ionic compounds are usually bonded by the ionic bonds in a compound.


Answer 11) The valency of an ion is equal to the charge on the ion.


Valency of any ion is always equal to the charge on that ion.


Answer 12) Mole is a link between the mass of a substance and number of formula units.


Usually the mole forms a link to define the mass of the substance and its formula.


Answer 13) The SI unit of amount of a substance is mole.


Mole is considered to be the SI unit for aount of substance of any chemical compound.

Answer : true or false.


Answer 1) Formula mass of Na_{2}O is 62 amu True


As we know there are 2 moles of Na and one mole of O so it will be (2 X 23) + 16 = 62 amu.


Answer 2) Those particles which have more or less electrons than the normal atoms are called ions True


We call ions to those atoms which hav more or less electrons in their normal atoms


Answer 3) Formula for sulphur dioxide is SO_{3}. False



The formula for sulphur dioxide  is SO_{2} as the name di suggests two molecules.


Answer 4) Molar mass of ethyne (C2H2) is 26 g/mol True.


As the ethyene molecule consists of 2 C atoms and 2 H atoms it will be (12 X 2) + (2 X 1) = 26


Answer 5) 22 gm of CO2 consists of 1 mole. False

 


The 1 mole of CO_{2} contains 1 C atom and 2  O atoms (12) + (16 X 2) = 44


Answer 6) Number of molecules in 32 gram of oxygen is 6.02 x 10^{23}. False


Only 1 moles of any substance will consist of 6.02 x 10^{23} molecules.


Answer 7) Water is an atom False.


Water is a molecule of 2 atoms namely hydrogen and oxygen.


Answer 8) Formula for sulphur dioxide is SO_{2} true.


As the name suggest sulphur along with two oxygen in it.


Answer 9) Clusters of atoms that act as an ion is called polyatomic ion. True


The clusters of ions from different atoms of the elements can be called as polyatomic ions.


Answer 10) Mass of 1 mole of a substance is called its formula mass. False.


As in formula mass we take the sum of the atomic weights of atoms in a molecule. And for 1 mole of a substance it is called as molar mass.


Answer 11) In a pure chemical compound, elements are always present in a definite proportion by mass. True


In any chemical reaction, the pure chemical compound is always found to have elements with definite proportion to their masses.


5 0
3 years ago
Air has a mass of 1.2g and a volume of 4,555ml. What is the density
coldgirl [10]

Answer:

<h2>Density = 0.00026 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

<h3>Density(\rho) =  \frac{mass}{volume}</h3>

From the question

mass of air = 1.2 g

volume = 4,555 mL

Substitute the values into the above formula and solve for the density

That's

<h3>Density =  \frac{1.2}{4555}</h3>

= 0.0002634

We have the final answer as

<h3>Density = 0.00026 g/mL</h3>

Hope this helps you

3 0
3 years ago
What is a half-life of an isotope? please help
N76 [4]

Answer:

Explanation:

Hello! Hope this helps!

One important measure of the rate at which a radioactive substance decays is called half-life, or t1/2. Half-life is the amount of time needed for one half of a given quantity of a substance to decay. Half-lives as short as 10–6 second and as long as 109 years are common.

3 0
3 years ago
PLEASE I NEED YOUR HELP, I WILL GIVE 10 POINTS PLEASEEEEE
Cerrena [4.2K]

Answer:

Erosion

Explanation:

3 0
2 years ago
Ways to manage non-biodegradable waste​
Lisa [10]

Answer:

The following are some ways of safely disposing of non-biodegradable waste.

1. Take them to a local recycling facility. Separate metal, plastic, glass, and other non-biodegradable waste and store them ready for recycling.

2. Combustion and energy recovery.

3. Disposal at sanitary facilities.

4. Reduce.

5. Landfills.

Explanation: Hope it helps! ^_^"

(G00gle)

7 0
2 years ago
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