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2 years ago

Which of the following statements is true?

Chemistry

2 answers:

Rom4ik [11]2 years ago

6 0

I think that its D.

Vikentia [17]2 years ago

5 0

That would be d you can tell by reading the answer very closely

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2 attempts left select the single best answer. The radii of the lithium and magnesium ions are 76 pm and 72 pm, respectively. Wh

Lina20 [59]

The ionic character of any compound depend on the lattice energy as well as the electronegativity of element present in that compound.

More would be the lattice energy more would be ionic nature of that compound.

The lattice energy of any compound is inversely proportional to the ionic radii cation and anion.

In given case the ionic radii of oxide in both oxides would be equal therefore the lattice energy only depend on the ionic radii of cation.

$Lattice energy (U) = \frac{1}{Ionic radii}$

As the radii of Magnesium less then radii of lithium therefore lattice energy of Magnesium oxide would be more than lithium oxide.

Hence, MgO would be more ionic in nature than $Li_{2}O$

8 0

1 year ago

A metal oxide with the formula mo contains 15.44% oxygen. in the box below, type the symbol for the element represented by m.

lana66690 [7]

Answer: The element represented by M is Strontium.

Explanation:

Let us consider the molar mass of metal be 'x'.

The molar mass of MO will be = Molar mass of oxygen + Molar mass of metal = (16 + x)g/mol

It is given in the question that 15.44% of oxygen is present in metal oxide. So, the equation becomes:

$\frac{15.44}{100}\times (x+16)=16g/mol\\\\(x+16)=\frac{16g/mol\times 100}{15.44}\\\\x=(103.626-16)g/mol\\\\x=87.62g/mol$

The metal atom having molar mass as 87.62/mol is Strontium.

Hence, the element represented by M is Strontium.

8 0

1 year ago

Read 2 more answers

In this lab, you will do experiments to identify types of changes. Using the question format you learned (shown above), write an

Vlad1618 [11]

Answer:

How can you distinguish a physical change from a chemical change?

Explanation:

4 0

1 year ago

Which statement describes a chemical reaction?

ELEN [110]

The statement that describes a chemical reaction is the statement c. reactants form products when atoms are rearranged. The atoms of the reactants are arranged is a specific position and number forming a determined compound. In a chemical reaction, the products are different compounds than the reactants, so the atoms have to rearrange to form these new compounds (the products).

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2 years ago

Read 2 more answers

Classify the following as qualitative or quantitative statements, giving your reasons. (a) The sun is approximately 93 million m

omeli [17]

Answer:

a) quantitative

b) qualitative

c) quantitative

d) qualitative

e) quantitative

Explanation:

a) it is a quantitative statement, since it uses the concepts of limits and aproxximation in the calculation to give its estimate.

b) it's a qualitative statement, beacause its an appreciation of someone who thinks that one's work ist better than another's.

c) it is a quantitative statement, since it is an expression that is mathematically demonstrated,

d) it's a qualitative, beacuse it'a a simple opinion of someone.

e) it is a quantitative statement, since this expression is demonstrated in real life and helps to save

8 0

2 years ago