Answer:
nitrogen
Explanation:
The atmosphere contains many gases, most in small amounts, including some pollutants and greenhouse gases. The most abundant gas in the atmosphere is nitrogen, with oxygen second. Argon, an inert gas, is the third most abundant gas in the atmosphere. Why do I care?
Answer:
C. Involves a metal and a nonmetal.
Explanation:
Ionic compound involves a metal and a non-metal. Ionic compounds have electrovalent bonds between them.
These compounds are usually made up of metals and non - metals combining to form a unit.
- The metals usually has low electronegativity and transfers it electrons to the non - metal.
- The non-metal has high affinity for the electron.
- The electrostatic attraction between the ions formed results in the ionic bond.
Copper oxide(solid) + Sulphuric Acid (aqueous)-> Copper Sulphate (aqueous)+ Water(liquid)
In equation form:
CuO +H2SO4 -> CuSO4 + H2O
The colour change you will see is black to blue as Copper oxide is usually found as a black powder. Upon the reaction with sulphuric acid it will change to a cyan blue.
If you heat the made solution of copper sulphate, the water will evaporate and you will be left with white anhydrous copper sulphate crystals.
Answer:
Molarity = 1 M
Explanation:
Given data:
Number of moles of NaHCO₃ = 0.1 mol
Volume of solution = 100 mL
Molarity of solution = ?
Solution:
Formula:
Molarity = number of moles of solute/ volume of solution in L
Now we will convert the mL of water into L.
100 mL × 1 L/1000 mL
0.1 L
Now we will put the values in formula.
Molarity = 0.1 mol/ 0.1 L
Molarity = 1 M
