1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alexandra [31]
2 years ago
5

2. Sate the method of collecting gases that areii). Lighter than aii). denser than air​

Chemistry
1 answer:
dybincka [34]2 years ago
3 0

Answer:

i) Upwards delivery

ii) Downwards delivery

Explanation:

The methods used in the collection of gases are quite different depending on the state of the gas. The solubility and density of gases are the factors that determine the method of collection to be used.

Upwards delivery is used to collect gases that are soluble in water and lighter compared to air. Examples of these kind of gases include; Cl2 and SO2

Downwards delivery is used to collect gases that are soluble in water and denser than air. An example of this kind of gas is ammonia gas, NH4.

You might be interested in
If the mass percentage composition of a compound is 72.1% Mn and 27.9% O, its empirical formula is
mojhsa [17]

Answer:

MnO- Manganese Oxide

Explanation:

Empirical formula: This is the formula that shows the ratio of elements

present in a  

compound.

   

How to determine Empirical formula

1. First arrange the symbols of the elements present in the compound

alphabetically to  determine the real empirical formula. Although, there

are exceptions to this rule, E.g H2So4

2. Divide the percentage composition by the mass number.

3. Then divide through by the smallest number.

4. The resulting answer is the ratio attached to the elements present in

a compound.

           

                                                                              Mn                         O    

                         

% composition                                                      72.1                      27.9    

                       

Divide by mass number                                       54.94                     16  

                                 

                                                                               1.31                      1.74    

                       

Divide by the smallest number                         1.31                      1.31                          

                                                                               1                    1.3

                                                 

The resulting ratio is 1:1

 

Hence the Empirical formula is MnO, Manganese oxide

8 0
3 years ago
How many Zn atoms are there in 4.65 moles of Zn?
Nesterboy [21]
So your answer would pretty much be 2.80 x 10^24. The picture is just the explanation and how you would get that answer.

8 0
2 years ago
his is the chemical formula for epinephrine (the main ingredient in adrenaline): C9H13O3N A biochemist has determined by measure
Len [333]

Answer:

3.67 moles of N

Explanation:

The epinephrine's chemical formula is: C₉H₁₃O₃N

We were told that a chemist found that in a mesaure of epinephrine, he found 33 moles of C

We must know that 9 moles of C are in 1 mol of C₉H₁₃O₃N so, let's make a rule of three:

If 9 moles of C are found in 1 mol of C₉H₁₃O₃N

Therefore 33 moles of C must be found in (33 .1) / 9 = 3.67 moles of C₉H₁₃O₃N

There is a second rule of three, then.

In 1 mol of C₉H₁₃O₃N we have 1 mol of N

Then, 3.67 moles C₉H₁₃O₃N must have (3.67 . 1) / 1 = 3.67 moles of N

Remember 1 mol of C₉H₁₃O₃N has 9 moles of C, 13 moles of H, 3 moles of O and 1 mol of N

5 0
3 years ago
In a galvanic cell,a oxidation occurs at the (name of electrode)b.the cathode is the (sign) electrodec.cations flow in solution
Tatiana [17]

Answer: a) anode

b) positive

c) cathode

d) anode to cathode

Explanation:

Galvanic cell is defined as a device which is used for the conversion of the chemical energy produces in a redox reaction into the electrical energy.

In the galvanic cell, the oxidation occurs at an anode which is a negative electrode and the reduction occurs at the cathode which is a positive electrode.  Thus the electrons are produced at anode and travel towards cathode.

Due to loss of electrons at anode, positive charge in concentrated in anode and negative charge is concentrated in cathode. To balance these charges , positive ions or cations from salt bridge move towards cathode and negative ions or anions from salt bridge move towards anode.

The balanced two-half reactions will be:

Oxidation half reaction : M(s)\rightarrow M^{n+}(aq)+ne^-

Reduction half reaction : X^{n+}(aq)+ne^-\rightarrow X(s)

Thus the overall reaction will be,

M(s)+X^{n+}(aq)\rightarrow M^{n+}(aq)+X(s)

7 0
3 years ago
What is an atomic number
klemol [59]

Answer:

the number of protons is called the atomic number

hope it helps you buddy

8 0
2 years ago
Read 2 more answers
Other questions:
  • Which of the reactions are spontaneous (favorable)?
    12·1 answer
  • Which correctly describes elements in the same group? select one:
    15·1 answer
  • What reaction type is depicted by the following equation? 2C2H2 + 5O2 4CO2 + 2H2O
    13·1 answer
  • When humans burn fuel or cut down trees, they ( increased or decrease) levels
    15·1 answer
  • summer school is over, and I'm feeling self-destructive. Take all of my points and have a good night. 3/3
    6·2 answers
  • Calculate the wavelength for the transition from n = 4 to n = 2, and state the name given to the spectroscopic series to which t
    6·1 answer
  • Sections of Earth’s continents are in slow, constant movement.
    8·1 answer
  • if the temperature of 20.0 L of gas were increased to twice the initial value, while the pressure is held constant what would be
    6·1 answer
  • In 6 months time, the Earth will revolve to the other side of the sun. During the June Solstice, the most
    14·1 answer
  • What is the temperature of 0. 750 mol of a gas stored in a 6,850 ml cylinder at 2. 21 atm?.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!