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Kay [80]
3 years ago
13

What properties you can determine for carbon and calcium based on their respective locations on the periodic table​

Chemistry
1 answer:
Gennadij [26K]3 years ago
3 0

Answer:

Carbon is non metal because it is found in the right side of the periodic table while calcium is metal because it is found in the left side of the periodic table.

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Binary compounds of alkali metals and hydrogen react with water to liberate hydrogen gas. The hydrogen gas from the reaction of
DanielleElmas [232]

Answer: The mass of H_{2} liberated is 0.0383 g and the mass of NaH that reacted 0.455 g.

Explanation:

The given data is as follows.

       Volume = 0.501 L,

 Temperature of gas = 35^{o}C = (35 + 273) K = 308 K,

 Total pressure = 760 mm Hg

  Vapor pressure of water at 35^{o}C = 422 mm Hg

  Partial pressure of H_{2} = (760 - 422) mm Hg

                                     = 717.8 mm Hg

The chemical equation is as follows.

       NaH + H_{2}O \rightarrow NaOH + H_{2}

Using ideal gas equation, we will find the moles of hydrogen gas as follows.

             PV = nRT

         n = \frac{PV}{RT}

As we know,

               1 atm = 760 mm Hg

      717.8 mm Hg = 717.8 \times \frac{1 atm}{760 mm Hg}    

                             = 0.944 atm

Putting the given values into the above formula we will calculate the number of moles as follows.

                    n = \frac{PV}{RT}

                       = \frac{0.944 atm \times 0.510 L}{0.08206 Latm/mol K \times 308 K}

                       = 0.0190 moles

Now, we will find the mass of H_{2} as follows.

       Mass = Moles × Molar mass

                 = 0.0190 moles × 2.01588 g/mol

                 = 0.0383 g

Therefore, mass of hydrogen is 0.0383 g.

As the ratio between H_{2} and NaH is 1:1. So, we will calculate the moles of NaH as follows.

             Mass = Moles × Molar mass

                       = 0.0190 moles × 23.99771 g/mol

                       = 0.455 g

Therefore, mass of NaH is 0.455 g.

6 0
2 years ago
Filtration, devastation, and evaporation are examples of
Mariana [72]
The answer is B :33333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333
4 0
2 years ago
Which of the following species cannot act as a Lewis base?
gayaneshka [121]

Answer:

NH4+

Explanation:

A Lewis base is a substance with the ability to share or give pairs of electrons.

The NH4 + ammonium ion donates a proton, therefore the ammonium ion is a Lewis acid.

6 0
3 years ago
Melamine is used for making
vodomira [7]

Answer:

Melamine is used for making tableware,cooking utensils, plates, plastic products etc.

Explanation:

Melamine is used to manufacture many products. How? Well melamine-formaldehyde resin, as it's full name, forms molecular structures that are molded, with heat, to take the shape of the items such as tableware.

After this chemical reaction takes place, the "left over" remains as plastic.

_________________________________________________

And so, it is used in products such as cooking utensils, plates, plastic products etc.

3 0
3 years ago
How many moles of Ar gas are<br> present in a container with a<br> volume of 78.4 L at STP?
rusak2 [61]
<h3><u>Answer:</u></h3>

<u>1 mole of a gas at STP occupies 22.4 L volume </u>

<u>Now the volume is given =78.4 therefore,</u>

<u>No. of moles of gas = 78.4 ÷ 22.4 = 3.5 moles</u>

<u>I hope it helps you~</u>

7 0
1 year ago
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