Answer:
All of the above
Explanation:
(I'm assuming you meant to put Australia in the options)
Australia is in the southern hemisphere and has its summer in December etc. and Winter in July etc.
China is in the northern hemisphere and has its summer in July etc and Winter in December etc.
2MgO
This is called redox reaction. Oxygen is the oxidizing agent to receive 2 electrons from Mg.
Mg is the reducing agent to give 2 electrons to O.
Mg becomes Mg2+ and O becomes O2-. These 2 ions form an ionic structure called MgO
The action force is the weight of your body pressing on the chair:
The ACTION of sitting.
The reaction force comes from the chair against your body. It is equal to your weight:
The chair's REACTION to you sitting on it.
Molar Mass of 1 molecule of methane(CH4) = 12 + 4 = 16g/mol
That is, 16g if CH4 contain 1 mole molecule of it
= 6.022×10²³ molecules of CH4 which consists of 1 mole of C atoms and 4 moles of H atoms.
=> 4 g of CH4 contains 1/4 × 6.022×10²³ molecules
= 1.5055×10²³ molecules of CH4
= 1.5055×10²³ C atoms and 6.022×10²³ H atoms
Note: the question should be how many atoms of hydrogen and carbon and not molecules.
Hope it helps…
