Answer:
Explanation:
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In this case, since this problem can be understood via the Graham's law, which states that states that the rate of diffusion or of effusion of a gas is inversely proportional to the square root of its molecular weight, which can be extrapolated to the rate, we have:
Thus, since the molar mass of helium is 4.0 g/mol and that of oxygen is 16.0 g/mol, we solve for the average velocity of helium as shown below:
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Ca(OH)2 is a strong base.
It’s name is calcium hydroxide and often it is easy to tell if something is a strong base if it has (OH) in the name.
Answer:
ZnO(s)—ZnO(s)
Explanation:
i considered a reaction of physical change since nothing is affected and thesalt I'd not hydrated so no mass is lost through loss of water or escape of gases to atmosphere
here the reaction only changes colour yellow to white or vice versa
Answer:
Intraspecific competition examples,
Interspecific competition examples,
and what causes it to happen. <em>Skip to the bottom for shortest answer.</em>
- Intraspecific competition is for instance, when two cows of the same species compete for grass, the food source.
- Interspecific competition is for example, when a bear and another species compete for fish.
But why does this happen? ↓
This competition happens because of limiting factors in the ecosystem, and general competition. Animals compete for their food because they need this food to survive. If they do not compete for the food, the other animal will get the food and the opposing animal will be left hungry. These are the main reasons why animals will compete for their resources.
In conclusion,
In a short sum, competition happens because animals need food, and when they can't get food, they compete.
The atomic mass of the element = 24.309547
<h3>Further explanation</h3>
Given
Isotopes of Mg
Required
The atomic mass
Solution
Atomic mass is the average atomic mass of all its isotopes
Mass atom X = mass isotope 1 . % + mass isotope 2.% ..
The atomic mass of the element(Mg) :
= 23.98504 . 0.7870 + 24.98584 . 0.1013 + 25.98259 . 0.1117
= 18.876226 + 2.531066 + 2.902255
= 24.309547