The objects that are rubbed together will create charges among themselves due to friction.
(1) The balloon rubbed with a wool cloth will be charged.
(2) If she comb near a small, uncharged object nothing will change.
(3) This is a scientific investigation because it does not involved a step by step process to answer a scientific query.
Answer:
Li = M₂O
Na = M₂O₂
K = MO₂
Rb = MO₂
Cs = MO₂
Explanation:
Since the reactivity of alkali metals increases on moving down the group with the increase in atomic size, their reactivity towards oxygen increases on going down the from lithium to caesium.
Lithium being the least reactive reacts with oxygen in the air to give white lithium oxide, LiO₂.
Sodium reacts with excess oxygen when heated to form sodium peroxide, Na₂O₂
Potassium reacts with excess oxygen when heated to form potassium superoxide, KO₂
Rubidium reacts with excess oxygen when heated to form rubidium suproxide, RbO₂
Caesium reacts with excess oxygen when heated to form caesium superoxide, CsO₂
Answer:
Petroleum and treating meals.
Answer:
10 moles of methane
Explanation:
1 mole of methane contains 6.02 × 10^23 molecules (Avogadro's number)
x moles should contain 7.02 x 1024 molecules of
methane
So,
x= 7.02 x 1024 × 1/6.02 × 10^23
x= 10 moles of methane
Answer:
If the boundary between the cold and warm air masses doesn't move, it is called a stationary front. The boundary where a cold air mass meets a cool air mass under a warm air mass is called an occluded front. ... Because cold air is denser than warm air, cold fronts are able to force warm air out more quickly.
Explanation:
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