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Marianna [84]
3 years ago
15

While looking at calcium (Ca) on the periodic table, a student needs to find an element with a greater atomic mass in the same p

eriod. Where should the student look? directly up directly down directly to the left directly to the right
Chemistry
2 answers:
Dmitry_Shevchenko [17]3 years ago
8 0

Answer:directly to the right

Explanation:

Atomic size increases from left to right

choli [55]3 years ago
6 0

Answer:

Directly to the right.

Explanation:

Atomic size increases from left to right

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Determine what type of compound is shown below:
34kurt

Answer:

Polar

Explanation:

Methanol is not electrostatic

It's not metallic as it has no metals in it

It's not ionic as coordinate bonding is made.

It's polar as a lone pair is present over OH-

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2 years ago
Is acetylene a homogeneous or heterogeneous mixture
kow [346]
<span>Acetylene is a pure substance so it is homogeneous.</span>
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Consider the reaction below. C2H4(g) + H2(g) to C2H6(g) Which change would likely cause the greatest increase in the rate of the
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D. Increase temperature and increase pressure
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What is meant by the biodegradability of soap molecules
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The biodegradability of soap moleculea means the soap molecules are degradable in nature it doesn't causes water pollution as comparing as detergent.....

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3 years ago
Consider two acids: (ch3)3cco2h (pivalic acid, pka = 5.0) and hco2h (formic acid, pka = 3.8). Which acid is the stronger acid? S
Phoenix [80]
<h3>Answer:</h3>

            Formic acid is the stronger acid.

<h3>Explanation:</h3>

                   The strength of an acid is determined by the power of it to dissociate and produce H⁺ ions. Greater the dissociation of an acid, the stronger that acid is. Also, extent of dissociation for particular acid is given by its dissociation constant i.e. Ka.

The greater the Ka value, the stronger an acid is and vice versa.

Calculating Ka value of Pivalic acid:

As,

                                                 pKa  =  -log [Ka]

So,

                                                 Ka  =  10^-pKa

Putting value of pKa,

                                                 Ka  =  10⁻⁵

                                                Ka  =  1.0 × 10⁻⁵

Calculating Ka value of Formic acid:

As,

                                                 pKa  =  -log [Ka]

So,

                                                 Ka  =  10^-pKa

Putting value of pKa,

                                                 Ka  =  10⁻³'⁸

                                                 Ka  =  1.58 × 10⁻⁴

<h3>Conclusion:</h3>

                  As the Ka value of Formic acid is greater than Pivalic acid therefore, it is stronger acid than Pivalic acid.

<h2>TIP:</h2>

     When comparing strength of acids, the acid with the lowest pKa value is considered the strongest acid and <em>vice versa</em>.

8 0
3 years ago
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