Answer:
A thermochemical equation for the combustion of propane (C3H8)(C3H8) is written as follows:
C3H8(l)+5O2(g)→3CO2(g)+4H2O(g);ΔH∘rxnC3H8(l)+5O2(g)→3CO2(g)+4H2O(g);ΔHrxn∘ = -2202.0 kJ/mol
The value given for ΔH∘rxnΔHrxn∘ means that:
a. the reaction of one mole of propane absorbs 2202 kJ of energy from the surroundings.
b. the reaction is endothermic.
c. the enthalpy of formation of propane is 2202 kJ/mol.
d. the reaction of one mole of propane releases 2202 kJ of energy to the surroundings.
e. None of these.
I believe its D. They can perform more functions.
Answer:
12.044 × 10²³ atoms of oxygen
Explanation:
Given data:
Number of atoms of oxygen = ?
Moles of oxygen = 2 mol
Solution:
Avogadro number:
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms of oxygen
2 mole × 6.022 × 10²³ atoms of oxygen / 1 mole
12.044 × 10²³ atoms of oxygen
Metals are placed in one spot,the nonmetals are placed in another spot,And lastly the metalloids are seperated
Tectonic plates are pieces of Earth’s crust, and mantle referred to as the lithosphere. They mainly consist of two types of material: oceanic and continental crust. Some of the most famous theories of the movement of tectonic plates involved gods of Greek mythology. For instance, many people believed the popular Greek king of the ocean, Poseidon, was responsible for Tsunamis, vicious waves, and even the expansion of the ocean. He was responsible for the movements of the ocean at the time. But nowadays, we notice, based on scientific and environmental facts, that the tectonic plates might have been shifting due to the intense heat in the Earth’s core, causing the mantle’s lithosphere to move.
