Answer:
See explanation
Explanation:
The oxides or hydrides are formed by exchange of valency between the two atoms involved. The group of the atom bonded to oxygen or hydrogen in the binary compound can be deduced by considering the subscript attached to the oxygen or hydrogen atom.
Now let us take the journey;
R2O3- refers to an oxide of a group 13 element, eg Al2O3
R2O - refers to an oxide of group a group 1 element e.gNa2O
RO2 - refers to an oxide of a group 14, 15 or 16 element such as CO2, NO2 or SO2
RH2 - refers to the hydride of a group 12 element Eg CaH2
R2O7 - refers to an oxide of a group 17 element E.g Cl2O7
RH3- refers to a hydride of a group 13 element E.g AlH3
Answer: The correct answer is (B).
Explanation:
Hypothesis is a predictive statement which relates two or more phenomena.
- It is tested to observe or to see whether it is true or false with the help of scientific means.
- it relates dependent and independent factors with each other
Theory is a tested and proved framework which explains single or multiple observed phenomena
- It is thoroughly proved and tested through experiments and observations.
- it is strongly supported by scientific evidences and observations.
Hence, a hypothesis is a prediction for a specific situation, while a theory is used to make predictions for many similar situations.
Answer:
(f - g)(2) = -6
Step-by-step explanation:
(f - g)(2) = (-2x + 8) - 5x, where x=2
= (-2(2) + 8) - 5(2)
= (-4 + 8) - 10
= 4 - 10
= -6
(f - g)(2) = -6
6.023 x 10²³ particles in 1 mole of Boron
1.61 x 10³⁴ particles in = 1.61 x 10³⁴ / 6.02 x 10²³
= 2.61 x 10³⁰ moles of Boron.
Answer:
Explanation:
Given:
we know the values of
Formula:
rearranging the formula and substituting values