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tamaranim1 [39]
3 years ago
14

2. Convert 6.578 x 1023 atoms of magnesium to moles. 6.578 x 1023 atoms x mol atoms

Chemistry
1 answer:
Stells [14]3 years ago
6 0

Answer:

1.092 moles of Mg

Explanation:

Avogadro's number is a constant that define the number of particles (Such as atoms, molecules, electrons, ions) that you have in 1 mole. That means in 1 mole you have 6.022x10²³ of the particle in question.

If you have 6.578x10²³ atoms of Mg -and 1 mole of Mg contains 6.022x10²³ atoms of Mg-:

6.578x10²³ atoms of Mg × (1 mole Mg / 6.022x10²³ atoms of Mg) =

<h3>1.092 moles of Mg</h3>
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In the reaction BaCO3 + 2HNO3 + Ba(NO3)2 + CO2 + H2O, what mass of Ba(NO3)2 can be formed by combining 55 g BaCO3 and 26 g HNO3
Nataliya [291]

From the stoichiometry of the reaction, the mass of barium nitrate produced is 54.9 g.

<h3>Stoichiometry</h3>

The term stoichiometry refers to mass - volume relationships. Stoichiometry can be used to calculate the amount, mass or volume of reactants and products from the balanced reaction equation.

The equation of the reaction is written as follows;

BaCO3 + 2HNO3 ------>  Ba(NO3)2 + CO2 + H2O

Number of moles of BaCO3  = 55 g/197.34 g/mol = 0.28 moles

Number of moles of HNO3 = 26 g/63.01 g/mol = 0.41 moles

From the reaction equation;

1 mole of BaCO3 reacts with 2 moles of HNO3

0.28 moles of BaCO3 reacts with 0.28 moles ×  2 moles/1 mole = 0.56 moles

There is not enough HNO3 hence it is the limiting reactant.

Number of moles of Ba(NO3)2 produced  is obtained from;

2 moles of HNO3  yields 1 mole of Ba(NO3)2

0.41 moles of HNO3  yields 0.41 moles × 1 mole/2 moles

= 0.21 moles of Ba(NO3)2

Mass of  Ba(NO3)2  = 0.21 moles  × 261.337 g/mol = 54.9 g

Learn more about stoichiometry: brainly.com/question/9743981

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3 years ago
Any molecule within a cell that has a uracil group will also contain
Iteru [2.4K]

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Nearest noble gas to this element is Krypton which has an atomic number 36.

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Sn=[Kr]4d^{10}5s^25p^2

As seen from above, Noble gas Krypton having symbol 'Kr' is coming in the electronic configuration for Tin.

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Which solution below would turn litmus paper red?
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Litmus paper turns red in acidic conditions whether its blue or red litmus ,its not NH3 (ammonia)  , neither is it barium hydroxide (A)  , sodium hydroxide (B) will make it blue or remain blue (depemding on type of paper used ) so it has to be D which is the chemjcal formula for acetic acid , hope this helps ! 
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Which of the following statements is true?
ioda

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C. A technological society has both a positive and negative impact on the environment

Explanation:

It is correct to suggest and to acclaim that a technological society has both a positive and negative impact on the environment.

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We see that technology has both negative and positive effects on the environment.

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