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3 years ago

13

the tip of a match contains chemical energy. Kevin's father lit a match and blew out the flame. then he tried to light the same

match again . Kevin observed that nothing happened. what can you infer from this observation?

1 answer:

Ostrovityanka [42]3 years ago

8 0

The chemicals were used so it did not light again

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Match: Substance ....... Definition Lewis acid A. Provides H+ in water Bronsted-Lowry base B. Provides OH - in water Arrhenius b

Igoryamba

Answer: F. Electron pair acceptor

Explanation:

A Lewis acid can be properly defined as any substance such as H+ (hygrogen ion) that can accept a pair of electron.

While a Lewis base is any substance such as (OH-) that can donate a pair of electron.

In the neutralization reaction between an acid ( H+ ) and a base (OH-). Hydrogen ion (H+ ) is the Lewis acid because it accepts an electron pair from (OH-).

Other examples of Lewis acid are; Mg2+, K+

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3 years ago

What makes a strong acid different from a weak acid?

timama [110]

Answer:

Strong acids react faster where as weak acids take time to react with any base.

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3 years ago

Read 2 more answers

How many km are in 5.6mm? 5.6x103 5.6x10-6 5.6x10-3 5.6x106

il63 [147K]

Hey there :)

<em>Q</em><em>u</em><em>e</em><em>s</em><em>t</em><em>i</em><em>o</em><em>n</em><em>:</em><em> </em><em>How many km are in 5.6mm? </em>

<em>=</em><em>></em><em>5.6x10</em><em>^</em><em>3 </em>

<em>=</em><em>></em><em>5.6x10</em><em>^</em><em>-6 </em>

<em>=</em><em>></em><em>5.6x10</em><em>^</em><em>-3 </em>

<em>=</em><em>></em><em> </em><em>5.6x10</em><em>^</em><em>6</em>

<em>A</em><em>n</em><em>s</em><em>w</em><em>e</em><em>r</em><em>:</em><em>-</em>

$5.6 \times 10^{ - 6}$

<em>E</em><em>x</em><em>p</em><em>l</em><em>a</em><em>n</em><em>a</em><em>t</em><em>i</em><em>o</em><em>n</em><em>:</em><em>-</em>

By using the formula-

$1millimeter = \frac{1}{1000000}$

As 1 with 6 zeros, we convert it into exponential form.

$= > \frac{1}{10^{6} }$

As this above value is fraction type, we can do the reciprocal, thus, the exponent gets a negative value.

$= > 10^{ - 6}$

Now combine with given question.

$= > 5.6 \times 10^{ - 6}$

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2 years ago

Why are Carbon-14 and carbon-12 considered to be isotopes?

zhannawk [14.2K]

Answer: I think it's a don't blame me if it's wrong though

Explanation:

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3 years ago

What STARTING element undergoes alpha decay to yield uranium-234 (U) as a PRODUCT?

nadezda [96]

Uranium-238 is the element that undergoes decay to yield uranium-234

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3 years ago