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3 years ago

43 Which element reacts spontaneously with 1.0M HCl (aq) at room temperature?

1 answer:

4 0

The correct answer is (4) zinc~

According to the reactivity series of metals, only zinc react with HCl (aq) at room temperature.

Hope this helps~

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Many food chains together create a______

Amanda [17]

Many food chains together create a food web.

hope this helps,, have a nice day :))

3 0

3 years ago

How many mols are present in the a sample of silver nitrate which has 5.3x10^24 molecules.

Westkost [7]

Answer: 5.3 x 10^24 formula units of silver nitrate is equivalent to 8.8 moles of silver nitrate. Silver nitrate is an ionic compound, therefore, its representative particle is called a "formula unit" instead of molecule. For every mole of a substance, we know that there are 6.022 x 10^23 representative units of that substance. The amount of particles in one mole of substance is called Avogadro's number.

Further Explanation:

We can convert from number of representative particles to moles using the formula:

$\boxed {no. \ of \ moles \ = \ ( given \ no. \ of \ particles) \ (\frac{1 \ mole}{\ 6.022 \ x 10^{23} particles})}$

For this problem, we can calculate the number of moles by plugging in the given values to the equation above,

$no. \ of \ moles \ = (5.3 \ x \ 10^{24} \ formula \ units \ AgNO_{3}) \ (\frac{1 \ mole \ AgNO_{3}}{6.022 \ x 10^{23} \ formula \ units AgNO_{3}}) \\\\\boxed {no. \ of moles \ AgNO_{3} \ = \ 8.8 \ moles}$

Learn More

Learn more about representative particles brainly.com/question/8969313
Learn more about Avogadro's number brainly.com/question/229300
Learn more about mole conversions brainly.com/question/1370888

Keywords: moles conversion, Avogadro's number

5 0

3 years ago

We do we mean when we say a substance is pure

tiny-mole [99]

Answer:

ot means that contains only one kind of matter.

6 0

3 years ago

Both hydrogen sulfide (H2S) and ammonia (NH3) have strong, unpleasant odors. Which gas has the higher effusion rate? If you open

Artist 52 [7]

Answer:

yooooo D kardi

Explanation:

3 0

3 years ago

How long must $542 be invested at a rate of 7% to earn $303.52 in interest

yulyashka [42]

The number of years that must be invested at a rate of 7 % to earn$ 303.52 in interest is

8 years

calculation

by use of the formula A = P (1+ rt)
where : A is the final amount = 542 + 303.52 =$ 845.52

P is the principal money to be invested = $ 542

r= rate= 7/100=0.07

t= time required

=$ 845.52=$ 542( 1+ 0.07 t)

open the bracket
= $845.53= $542 + $37.94 t

like terms together

=$ 845.53 -$542 = $37.94 t

=$303.52 =$37.94 t

divide both side by $37.94

= $303.52/ $ 37.94 = $37.94t/$37.94

t= 8 years

7 0

3 years ago