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
julia-pushkina [17]
3 years ago
8

What is the most abundant gas in our atmosphere? oxygen hydrogen nitrogen water

Chemistry
2 answers:
Artyom0805 [142]3 years ago
8 0

The answer is NItrogen

Inessa [10]3 years ago
7 0
It seems that nitrogen is, but its odd tbh.
You might be interested in
Please Help!!<br> Qns 1b to 3
Gelneren [198K]

Answer: Ammonium, when heated with aqueous base, will give off NH3 (ammonia) gas, (and depending, water vapor). This will leave the Cr2O3(s). From then on,

it is just adding or subtraction of gases or water vapor. You probably heard “Loss of electrons is Oxidation”, “Gain of Electrons is reduction”. That should help.

Explanation: This isn’t an explanation but an interesting point; Acid-Base and RedOx reactions are useful to the most complex of any Chemistry. Get this down, and Organic Chemistry will be much easier.

7 0
3 years ago
Calculate the freezing point of a solution 1.25 g benzene (C6H6) in 125 g of chloroform (CHCl3).
posledela

Answer:

The freezing point for the solution is -64.09°C

Explanation:

This problem can be solved, by the freezing point depression. This colligative problem shows, that the freezing point of a solution is lower than the freezing point of pure solvent.

ΔT = Kf.  m

ΔT = T° freezing pure solvent - T° freezing solution

Kf = Cryscopic constant, for chloroform is 4.68

T°freezing pure solvent = -63.5°C

m is mol/kg of solvent → molality

Let's determine the moles of benzene

1.25 g / 78 g/mol = 0.0160 mol

Let's convert the mass of solvent to kg

125 g . 1kg / 1000 g = 0.125 kg

m = 0.0160 mol / 0.125 kg → 0.128 m

Let's go to the formula to replace the data

-63.5°C - T° freezing solution = 4.68 °C/m . 0.128 m

T° freezing solution = - (4.68 °C/m . 0.128 m + 63.5°C)

T° freezing solution = - 64.09°C

3 0
3 years ago
The specific heat capacity of liquid ethanol is 2.42 J/gºC.
VladimirAG [237]
Hope it helps for you : )

8 0
2 years ago
LIMITING REACTANT!! Please help I’m very confused.
alexira [117]

Answer:

We'll have 1 mol Al2O3 and 3 moles H2

Explanation:

Step 1: data given

Numer of moles of aluminium = 2 moles

Number of moles of H2O = 6 moles

Step 2: The balanced equation

2Al + 3H2O → Al2O3 + 3H2

Step 3: Calculate the limiting reactant

For 2 moles Al we need 3 moles H2O to produce 1 mol Al2O3 and 3 moles H2

Aluminium is the limiting reactant. It will completely be consumed (2 moles).

H2O is in excess. There will react 3/2 * 2 = 3 moles

There will remain 6 - 3 = 3 moles

Step 4: Calculate moles products

For 2 moles Al we need 3 moles H2O to produce 1 mol Al2O3 and 3 moles H2

For 2 moles Al we'll have 2/1 = 1 mol Al2O3

For 2 moles Al We'll have 3/2 * 2 = 3 moles H2

We'll have 1 mol Al2O3 and 3 moles H2

8 0
3 years ago
What is the normal pH range of a Base?
Karolina [17]

Answer:

7.35 - 7.45

Explanation:

The pH scale ranges from 0 (strongly acidic) to 14 (strongly basic or alkaline). A pH of 7.0, in the middle of this scale, is neutral. Blood is normally slightly basic, with a normal pH range of about 7.35 to 7.45. Usually, the body maintains the pH of blood close to 7.40.

Hope this helps

6 0
2 years ago
Read 2 more answers
Other questions:
  • Phosphorus combines with oxygen to form two oxides. Find the empirical formula for each oxide of phosphorus if the percentage co
    11·1 answer
  • Physical activity and exercise typically lead to __________.
    15·2 answers
  • Electrons are never found in -
    15·1 answer
  • As members approach the ending of a group or are leaving an ongoing group, it is equally essential that they be encouraged to ex
    13·1 answer
  • PLEASE HELP!! What is the percentage by mass of solution formed by dissolving 27.0 grams of HCl in 102.0 grams of water? 26.5% 2
    13·1 answer
  • When iron reacts with oxygen, it forms iron oxide, or rust.
    11·1 answer
  • An archaeologist discovers an ancient wooden bowl. which isotope would most likely be used to determine its age?
    10·2 answers
  • 1. List 3 physical and chemical phenomena
    9·1 answer
  • ⚠️HURRY PLEASE⚠️FAST IM TIMED⚠️
    5·2 answers
  • The diagram below shows the different phase transitions that occur in matter. Three bars are shown labeled Solid, Liquid, and Ga
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!