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Anvisha [2.4K]
3 years ago
15

13. Describe briefly how you figured out what the name of the element is:

Chemistry
1 answer:
zloy xaker [14]3 years ago
7 0
Answer:
13) between the nucleus, there is a proton and electron number given, (looking at the periodic table, it gives you the name of the element)

14) an ion, in any element has a POSITIVE charge no matter what.. the numbers depend on what it element the ion is with..
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The molar mass of a certain gas is 49 g. What is the density of the gas in g/L at STP?
snow_tiger [21]

Answer:

\boxed{\text{2.2 g/L}}

Explanation:

We can use the Ideal Gas Law to calculate the density of the gas.

   pV = nRT

      n = m/M           Substitute for n

   pV = (m/M)RT     Multiply both sides by M

pVM = mRT            Divide both sides by V

  pM = (m/V) RT

     ρ = m/V             Substitute for m/V

 pM = ρRT              Divide each side by RT

\rho = \frac{pM }{RT}

Data:

p = 1.00 bar

M = 49 g/mol

R = 0.083 14 bar·L·K⁻¹mol⁻¹

T = 0 °C = 273.15 K

Calculation:

ρ = (1.00 × 49)/(0.083 14 × 273.15) = 2.2 g/L

The density of the gas is \boxed{\text{2.2 g/L}}.

8 0
4 years ago
Some covalent compounds dissociate into ions in water. What atom do these compounds have in their structures? What type of solut
valentina_108 [34]

H atoms are found in the molecules of covalent compounds that dissolve in water. These compound are called acids (proton donors). They form acidic solutionst{acidic solutions} acidic solutions.

Because there are no ions moving about in solution with covalent molecules, they are characterised as non-electrolytes. Non-electrolyte solutions are those that do not conduct electricity.

Examples are hydrochloric acid (HCl), sulfuric acid (H2SO4), and nitric acid solutions (HNO3).

<h3>What type of compounds dissociate in water to form ions?</h3>

When certain substances dissolve in water, they undergo either a physical or a chemical change that results in the formation of ions in solution. These substances are members of an important class of compounds known as electrolytes. Nonelectrolytes are substances that do not produce ions when dissolved.

A substance is known as a strong electrolyte if the physical or chemical process that generates the ions is essentially 100% efficient (all of the dissolved compound yields ions). A weak electrolyte is one in which only a small portion of the dissolved substance undergoes the ion-producing process.

learn more about Covalent refer

brainly.com/question/12732708

#SPJ4

3 0
2 years ago
Plz do it ..i am confused​
Lubov Fominskaja [6]

Answer:

..             ..

O : : C : : O

..             ..

Explanation:

8 0
3 years ago
Read 2 more answers
Question 5. 5. A chemist studies two forms of refined gasoline. Which of the following branches of chemistry might the chemist u
mr Goodwill [35]
<span>Analytic chemistry because he is comparing to types of refined gasoline. </span>
7 0
3 years ago
Read 2 more answers
2A + 3B --&gt;C + D When 5 units of A and 6 units of B are allowed to react, the limiting reactant would be:
kodGreya [7K]

Answer:

The limiting reactant is B.

Explanation:

The equation for the reaction is given below:

2A + 3B —> C + D

The limiting reactant can be obtained as follow:

From the equation above,

2 units of A reacted with 3 units of B.

Therefore, 5 units of A will react with = (5 x 3) /2 = 7.5 units of B.

From the calculation made above, we can see that it will take a higher unit of B i.e 7.5 units than what was given i.e 6 units to react completely with 5 units of A.

Therefore, B is the limiting reactant and A is the excess reactant.

7 0
3 years ago
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