Answer:
The unknown element is Carbon.
(a) X is Carbon, its oxide is of acidic nature
(b) C+ O2 → CO2
Explanation:
We are given an unknown element that reacts with oxygen.
X + O2 → XO2
It is given that the oxide XO2 turns blue litmus red which is shown by acids, so XO2 is an acidic oxide. Also X will be a Non metal because Non metallic oxide is Acidic in nature.
The Oxide XO2 is dissolving is water. The oxide upon reacting with water will give an Acid.
XO2 type of oxide is found in the 14th group of the periodic table generally
So we have options like C, Si and Ge as these only have the Acidic oxide.
But when it comes to reactivity with water Only Carbon satisfies the need so the unknown element X is C.
CO2 + H2O → H2CO3 which is an acid.
(a) Element X is Carbon (C), The nature of the compound formed is Acidic.
(b) The reaction given will be as follows
C+ O2 → CO2
Therefore the unknown element is Carbon.
Question:
Which subscripts complete the chemical formula for the compound?
Answer:
A: 3
B: 8
Answer:
Pneumonoultramicroscopicsilicovolcanoconiosis
Explanation:
It is thought that Milankovitch cycles caused past ice age climates.
This cycle is related to the movement of earth
The cycle has three parts eccentricity, axial tilt, and precession. These three are supposed to be deciding factor for the amount of heat reaching on earth from sun
thus the complete Milankovitch cycle do affect the temperature and hence the climate on earth.
