2 years ago

Define the term Symmetry? and explain its types

1 answer:

5 0

Answer:

Mathematically, symmetry means that one shape becomes exactly like another when you move it in some way: turn, flip or slide. ... There are three basic types of symmetry: rotational symmetry, reflection symmetry, and point symmetry.

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How would the moon appear from earth if the moon did not rotate?

ivolga24 [154]

If the moon did not rotate we would see all hemispheres of the moon as it revolves around the Earth and not just the phases.

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2 years ago

An acid with the general formula RCOOH is used to make a 0.10 M solution in water. The pH of this acid solution is measured as 3

Sati [7]

Answer:

0.159 \%

Explanation:

The acid will dissociate according to the reaction shown below:-

$RCOOH + H_2O\rightleftharpoons RCOO^- + H_3O^+$

Given that, pH=3.8

The concentration of can be determined from the expression fo pH as:-

pH = - log $[H^+]$

3.8 = - log $[H^+]$

$[H^+]$ = $1.59\times 10^{-4}\ M$

The initial concentration of RCOOH was 0.10 M, then the percent dissociation was- calculated as shown below:-

$\% \ dissociation=\frac{1.59\times 10^{-4}}{0.10}\times 100=0.159\ \%$

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2 years ago

Which of the following is a physical property? A. Flammability B. Heat of combustion C. Solubility D.Toxicity

Rasek [7]

I think it would be solubility but I’m not sure

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2 years ago

Read 2 more answers

A buffer contains the weak acid HA and its conjugate base A-. the weak acid has a p Ka of 4.82 and the buffer has a pH of 4.25.

klasskru [66]

<span>I think the correct answer is A. A buffer is a substance that resists small change in the acidity of a solution when an acid or base is added to the solution. Usually, a buffer involves a weak acid or a weak alkali and one of its salt.</span>

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2 years ago

How many moles are there in 2.75L of a 2.0M solution

gtnhenbr [62]

5.5 moles
2.0=x/2.75
2.0*2.75= x/2.75 (2.75)
5.5=x

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2 years ago