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boyakko [2]
3 years ago
12

Which of the following formulas is used to determine the pH of a solution?

Chemistry
1 answer:
hjlf3 years ago
3 0

Answer:

pH = -log[H+]

Explanation:

The pH of a solution is simply the negative logarithm of the hydrogen ion concentration. It can thus be written mathematically as:

pH = -log[H+]

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Anna stated that ionic compounds have high melting points and low boiling points. She said that this demonstrates that ionic com
Ainat [17]

Answer:

The answer to your question is: letter A

Explanation:

a.Strong electrical forces will make ionic compounds have high boiling points.  This option is correct because ionic bonds are strong which makes substances have high boiling points.

b.Strong electrical forces will make ionic compounds have weak bonds.  This option is false, ionic compounds have strong bonds.

c.A low amount of energy is needed to break the bonds in ionic compounds.  The high amount of energy is needed to break ionic bonds.

d.Gravitational forces hold the bonds together in ionic compounds. Gravitational forces do not affect the ionic compounds.

8 0
3 years ago
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Does a falcon eat a lizard
crimeas [40]

Answer:

yes

Explanation:

The most common prey item is pigeons. Peregrine falcons will also eat small reptiles and mammals.

5 0
3 years ago
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Why Ammonia is nut dried by passing through concentrated H2SO4.​
STALIN [3.7K]

Answer:

Because it is absorbed by conc . H . SO , to form ammonium sulphate.

6 0
3 years ago
The reaction of 2-chloropropane with sodium hydroxide can occur via both SN1 and SN2 mechanisms.
strojnjashka [21]

Answer:

Explanation:

(a) Part 1: S_N1 reaction. This is a nucleophilic substitution reaction in which we have two steps. Firstly, chlorine, a good leaving group, leaves the carbon skeleton to form a relatively stable secondary carbocation. This carbocation is then attacked by the hydroxide anion, our nucleophile, to form the final product.

To summarize, this mechanism takes places in two separate steps. The mechanism is attached below.

Part 2: S_N2 reaction. This is a nucleophilic substitution reaction in which we have one step. Our nucleophile, hydroxide, attacks the carbon and then chlorine leaves simultaneously without an intermediate carbocation being formed.

The mechanism is attached as well.

(b) The rate determining step is the slow step. Formation of the carbocation has the greatest activation energy, so this is our rate determining step for S_N1. For S_N2, we only have one step, so the rate determining step is the attack of the nucleophile and the loss of the leaving group.

3 0
3 years ago
How many grams of H2O are produced when 35.0 g of NaOH reacts with 17.5 g of CO,?
zhenek [66]

Answer:

2NaOH + CO2 -> Na2CO3 + H2O

1) Find the moles of each substance

\eq n(NaOH)=\frac{35.0}{22.99+16.00+1.008\\}\  =\frac{35.0}{39.998} \ = 0.8750437522 moles\\n(CO_{2} ) = \frac{17.5}{12.01+32.00} = \frac{17.5}{44.01} = 0.3976369007 moles\\

2) Determine the limitting reagent

\\NaOH = \frac{0.8750437522}{2} = 0.4375218761\\\\

∴ Carbon dioxide is limitting as it has a smaller value.

3) multiply the limiting reagent by the mole ratio of unknown over known

n(H2O ) = 0.3976369007 × 1/2

             = 0.1988184504 moles

4) Multiply the number of moles by the molar mass of the substance.

m = 0.1988184504 × (1.008 × 2 + 16.00)

   = 0.1988184504 × 18.016

   = 3.581913202 g

Explanation:

6 0
3 years ago
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