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3 years ago

As you move from _ to __ on the periodic table, the atomic radius of the atoms increase.

2 answers:

7 0

Therefore, moving left to right across a period the nucleus has a greater pull on the outer electrons and the atomic radii decreases. Moving down a group in the periodic table, the number of filled electron shells increases

swat323 years ago

4 0

Explanation:

In a group, when we move down from top to bottom then there occurs an increase in atomic size due to addition of electrons into the new shells of elements.

For example, lithium and cesium are same group elements. Atomic radius of lithium is 182 pm and atomic radius of cesium is 343 pm.

Whereas when we move across a period then there occurs a decrease in atomic radius of the atoms due to addition of electrons into the same shell.

Therefore, we can conclude that as you move from top to bottom on the periodic table, the atomic radius of the atoms increase.

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To preserve natural resources, which of the following should be recycled?

Shkiper50 [21]

<span> I suppose carbon dioxide produced from burning coal and oil can be recycled and converted to methanol. i hope this answers your question</span>

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4 years ago

5. In a general chemistry laboratory experiment, a student produces 2.73 g of a compound. She calculates the

OLEGan [10]

The percent yield is given by the actual and the theoretical yield. The percent yield of the 2.73 gm compound is 80.3%. Thus, option b is correct.

<h3>What is the percent yield?</h3>

The percent yield is the ratio of the actual yield to the theoretical yield. It is calculated as:

% Yield = Actual yield ÷ Theoretical yield × 100%

= 2.73 ÷ 3.84 × 100%

= 71.09 %

As the closest number to 71.09 is 80.3% the percent yield will be 80.3%.

There is no limiting reagent in the reaction between the copper iodide and mercury iodide as the moles of the reactants and the products are in equal quantity.

Hence, option b. there is no limiting reagent in this reaction.

Learn more about percent yield here:

brainly.com/question/17042787

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8 0

2 years ago

What is the enthalpy for reaction 1 reversed? reaction 1 reversed: 2co2 + 3h2o→c2h5oh + 3o2 express your answer numerically in k

Rama09 [41]

Answer: The enthalpy of the given reaction is 1234.8kJ/mol.

Explanation: Enthalpy change of the reaction is the amount of heat released or absorbed in a given chemical reaction.

Mathematically,

$\Delta H_{rxn}=\Delta H_f_{(products)}-\Delta H_f_{(reactants)}$

For the given reaction:

$2CO_2(g)+3H_2O(g)\rightarrow C_2H_5OH(l)+3O_2(g)$

$H_f_{(CO_2)}=-393.5kJ/mol$

$H_f_{(H_2O)}=-241.8kJ/mol$

$H_f_{(C_2H_5OH)}=-277.6kJ/mol$

$H_f_{(O_2)}=0kJ/mol$

$\Delta H_{rxn}=\Delta H_f_{(C_2H_5OH)}+3\Delta H_f_{(O_2)}-[2\Delta H_f_{(CO_2)}+3\Delta H_f_{(H_2O)}]$

Putting values in above equation, we get:

$\Delta H_{rxn}=[-277.6+3(0)]-[2(-393.5)+3(-241.8)]kJ/mol$

$\Delta H_{rxn}=1234.8kJ/mol$

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3 years ago

The oh concentration in a 1.0 x10 3 m ba oh 2 solution is

Lisa [10]

Ba(OH)2 dissociates according to the equation below to yield Barium ions and hydroxide ions.
Ba(OH)2 = Ba²⁺ + 2 OH⁻
The concentration of Ba²⁺ is 1.0 ×10^-3 M
Thus that of OH⁻ ions will be 2× 1.0 ×10^-3 = 2.0 × 10^-3 M
Thus; the answer is 2.0 × 10^-3 M

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3 years ago

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Why critical thinking and skepticism are important to scientific inquiry

Ludmilka [50]

Inquiry; wanting to know. Thinking critically to figure out, understand. However being skeptic to not fall on one simple answer. For possibly, it could be incorrect.

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4 years ago

As you move from ___________ to ____________ on the periodic table, the atomic radius of the atoms increase.

As you move from _ to __ on the periodic table, the atomic radius of the atoms increase.