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3 years ago

The balanced chemical equation for the reaction of copper (Cu) and silver nitrate (AgNO3) is shown below.

2 answers:

8 0

Remark
The balance numbers in front of Ag and AgNO3 are both 2. That number is in moles.

Rule: if the moles are the same in the equation, then whatever you are given for one, will be the same for the other. So you have 0.854 moles of Ag. You will also have 0.854 moles of AgNO3

Answer: 0.854 <<<<<

Snezhnost [94]3 years ago

4 0

<u>Answer:</u> Moles of $AgNO_3$ that must be reacted are 0.854 moles.

<u>Explanation:</u>

For the given chemical reaction, the equation follows:

$Cu+2AgNO_3\rightarrow 2Ag+Cu(NO_3)_2$

By Stoichiometry of the reaction:

2 moles of silver are produced when 2 moles of silver nitrate is reacted.

So, 0.854 moles of silver is formed when = $\frac{2}{2}\times 0.854=0.854moles$ of silver nitrate is reacted.

Thus, moles of $AgNO_3$ that must be reacted are 0.854 moles.

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A radio station broadcasts at a frequency of 590,000 Hz. What is the wavelength of the radio waves?

34kurt

Answer:

f = frequency = 590,000 Hz ===> 59×10^4 Hz

λ = Wavelength = ?

c = Speed of light in a vacuum = 3 × 10^8 m/s

** Hz = 1/sec

___o___o___

$f = \frac{c}{λ} \\ \\ λ = \frac{c}{f} \\ \\ λ = \frac{3 \times {10}^{8} }{590000} \\ \\ λ = \frac{3 \times {10}^{8} }{59 \times {10}^{4} } \\ \\ λ =0.0508 \times {10}^{4} \: m \\ \\ λ = 508 \times {10}^{ - 4} \times {10}^{4} \: m \\ \\ λ = 508 \: m$

I hope I helped you^_^

8 0

3 years ago

Will iron fillings and lead oxide powder react

Andru [333]

Answer:

Yes they woll react.

Explanation:

Ferous oxide and zinc will be product.

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4 years ago

Potential energy due to the position of an object above earth surface is called

KengaRu [80]

ANSWER:

Potential energy due to the position of an object above Earth's surface is called gravitational potential energy.

EXPLANATION:

Gravitational energy is the potential energy compared with gravitational force, as work is needed to further things against Earth’s gravity. The potential energy due to high positions is called gravitational potential energy, and is evidenced by water in an elevated storage or kept behind a dam. If an article falls from one point to different point inside a gravitational field, the force of gravitation will do actual work on the object, and the gravitational potential energy will decrease by the same amount.

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3 years ago

25cm3 of gas at 1 atm has a temperature of 20 degree celsis .

Andreas93 [3]

Answer:

1.28 atm

Explanation:

To solve this problem, you need to use the gas laws, more specifically the Combined Gas Law. It is P1V1/T1 = P2V2/T2. Simply plug your values in. But be careful! Make sure you convert your 20 degree C and 28 deg C to Kelvin, as that it the only temperature scale the Gas Laws work with. Upon plugging in your values, you get approximately 1.28 atm.

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3 years ago

How many atoms are there in 3.559*10^-6 mol of krypton?

algol [13]

Answer:

The answer is

<h2> $2.143 \times {10}^{18} \: \: atoms$ </h2>

Explanation:

To find the number of atoms given the number of moles we use the formula

N = n × L

where

N is the number of entities

n is the number of moles

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

$n = 3.559 \times {10}^{ - 6} \: mol$

Substitute the values into the above formula and solve

That's

<h3> $N = 3.559 \times {10}^{ - 6} \times 6.02 \times {10}^{23} \\ = 2.1425 \times {10}^{18}$ </h3>

We have the final answer as

<h3> $N = 2.143 \times {10}^{18} \: \: atoms$ </h3>

Hope this helps you

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4 years ago