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Cloud [144]
3 years ago
6

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it helps scientists understand

the history of the earth. Be sure your explanation contains a minimum of two complete sentences.
Chemistry
1 answer:
Ahat [919]3 years ago
6 0

Answer:

Explanation:

Take a look at the balanced chemical equation that describes this reaction

Cu

(

s

)

+

2

AgNO

3

(

a

q

)

→

Cu

(

NO

3

)

2

(

a

q

)

+

2

Ag

(

s

)

Notice that the chemical equation provides you with information about how many moles of each chemical species takes part in this reaction.

More specifically, you know that

1

mole of solid copper will react with

2

moles of silver nitrate to produce

1

mole of aqueous copper(II) nitrate and

2

moles of solid silver.

So, assuming that you have enough silver nitrate available to allow for all the sample of copper to react, you can expect the reaction to produce twice as many moles of solid silver than you have moles of solid copper taking part in the reaction.

Use the molar mass of copper to calculate how many moles you have in your sample

1.00

g

⋅

1 mole Cu

63.546

g

=

0.01574 moles Cu

According to the aforementioned mole ratio, the reaction will produce

0.01574

moles Cu

⋅

2

a

moles Ag

1

mole Cu

=

0.03148 moles Ag

Finally, use the molar mass of silver to convert the number of moles to grams

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Answer:

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Explanation:

4 0
3 years ago
Someone answer this please.
Nataly_w [17]

Answer: The percent composition of oxygen is 54.5%

Explanation:

Below I have attached my work through, but essentially the percent composition relies on finding the mass of the oxygens and dividing it by the mass of the whole compound. The masses of the elements can be found on the periodic table and added together to get a mass of the whole compound- ascorbic acid. Then, you turn this proportion into a percent by multiplying by 100%.

6 0
3 years ago
Read 2 more answers
A liquid that occupies a volume of 0.820 L has a mass of 2.56 kg.
user100 [1]

Answer:

The density of this liquid is 0.320 kg/L

Explanation:

Given:

Volume of the Liquid =  0.820 L

Mass of the liquid  = 2.56 kg.

To Find:

The density of the liquid in  kg/L

Solution:

Density is the mass occupied by the substance in unit volume. This density is essential determining whether the substance floats or sinks. Greek letter(rho) is used to denote density

The equation of for density is

Density = \frac{mass}{volume}

\rho = \frac{m}{v}

where m is the mass

v is the volume

On substituting the given values

\rho = \frac{0.820 }{2.56}

\rho = 0.320 kg/L

7 0
3 years ago
Consider the following balanced equation: 3Ca(NO3)2 + 2AlCl3 --> 2Al(NO3)3 + 3CaCl2. If 610.5 g of calcium nitrate react, wha
____ [38]

Answer:

600g for st product 477.5g for nd product

7 0
3 years ago
Which notation represents the largest atomic radius?<br><br> Cl<br><br> F<br><br> F−<br><br> Cl−
hichkok12 [17]

Answer:

Cl⁻

Explanation:

Definition of atomic radii

The atomic radius is the distance between center of two bonded atoms.

Trend along period:

As we move from left to right across the periodic table the number of valance electrons in an atom increase.The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases.

Trend along group:

In group by addition of electron atomic radii increase from top to bottom due to increase in atomic number and addition of extra shell.

In this way Cl⁻ will have the largest atomic radii because one extra electron is added and its atomic number is already greater than fluorine.

5 0
3 years ago
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