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3 years ago

Which of these pairs would form an ionic bond? K and Br

Chemistry

2 answers:

weeeeeb [17]3 years ago

8 0

Answer:

K and Br

Explanation:

I got it right duhhh

ZanzabumX [31]3 years ago

5 0

is there any other pairs

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The proposed mechanism for a reaction is: Step 1: A + B X (fast) Step 2: X + C Y (slow) Step 3: Y D (fast) What is the overall r

PolarNik [594]

Answer:

(slow)xy2+z→xy2z (fast) c step1:step2:xy2+z2→xy2z2

Explanation:

Step1: xy2+z2→xy2z2 (slow)

Step2: xy2z2→xy2z+z (fast)

2XY 2 + Z 2 → 2XY 2 Z

Rate= k[xy2][z2]

When the two elementary steps are summed up, the result is equivalent to the stoichiometric equation. Hence, this mechanism is acceptable. The order of both elementary steps is 2, which is ‘≤3’; this also makes this mechanism acceptable. Furthermore, the rate equation aligns with the experimentally determined rate equation, and this also makes this mechanism acceptable. Therefore, since all the three rules have been observed, this mechanism is possible.

5 0

3 years ago

How many ions are present in 9.4g of pottasium oxide K2O? (K=39 ,O=16) (Avogadros constant=6.0*10^23/mol)

elena-14-01-66 [18.8K]

1) k2O = 2K(1+) + O(2-)

This is, every molecule of K2O consists of three ions (2 of K 1+, and one of O 2-)

2) Caluclate the number of moles of K2O

- molar mass of K2O = 2*39 + 16 = 94 g/mol
- n = mass / molar-mass = 9.4g / 94 g/mol = 0.1 mol

3) Multiply by 3 to have the number of moles of ions: 3 *0.1 mol = 0.3 mol of ions.

4) Multiply by Avogadro's number to obtain the number of ions"

0.3 mol * 6.0*10^23 =1.8 * 10^23 ions.

Answer: 1.8*10^23 ions

6 0

4 years ago

The bonds S-S, O-H and Ca-Cl are, respectively, a) nonpolar covalent, polar covalent, ionic polar covalent, b)nonpolar covalent,

Brums [2.3K]

Answer:

nonpolar covalent, polar covalent, ionic

Explanation:

From the question ,

S - S Bond -

Both the atom are same , hence , making a non polar bond , because of no difference between the electronegativity of the atom ,

Hence , the S-S Bond is non polar covalent bond .

O-H bond -

The Oxygen atom is more electronegative than the hydrogen atom , so the bond is polar in nature .

And as the bond is formed by sharing ,

Therefore ,

O-H bond is polar covalent bond .

Ca-Cl bond -

Calcium is a metal , whereas , Chlorine is a non - metal , the bond is ionic in nature ,

Hence , Ca-Cl bond is ionic in nature .

7 0

3 years ago

MAXImum [283]

Answer:

Sulfuric acid + Zinc = reactant

Zinc sulfate + hydrogen = product

Lead oxide + carbon = reactant

lead + carbondioxide = product

Explanation:

Chemical equation:

Sulfuric acid + Zinc → Zinc sulfate + hydrogen

H₂SO₄ + Zn → ZnSO₄ + H₂

In this reaction sulfuric acid and zinc react to produce the zinc sulfate and hydrogen. That's why sulfuric acid and zinc are reactant. While zinc sulfate and hydrogen are products.

2nd reaction:

Lead oxide + carbon → lead + carbondioxide

2PbO + C → 2Pb + CO₂

In this reaction Lead oxide and carbon react to produce the lead and carbondioxide. That's why Lead oxide and carbon are reactant. While lead and carbondioxide are products.

3 0

3 years ago

Difference between isopropyl alcohol and ethyl alcohol

Tanzania [10]

Answer:

Both alcohols are flammable, and both are used as disinfectants. There are varying grades of both in terms of purity, ethanol is more widely used in wet laboratories whereas isopropyl alcohol is preferentially used to disinfect electronic devices.

3 0

2 years ago