4Al + 3O2 --> 2Al2O3
(5.23mol Al)(2mol Al2O3/4mol Al) = 2.62mol Al2O3
Calcium will loose one electron. Fluorine will gain one electron. Lithium will loose one electron. Argon will not loose any because it already has a full valence level. Aluminium will loose 3 electrons.
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Answer:</h3>
52 g water
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Explanation:</h3>
In this question we are given;
Amount of heat, Q = 520 calories
Change in temperature, K = 10 K
We are required to calculate the mass of water.
Amount of heat is calculated by multiplying mass by specific heat capacity by change in temperature.
Q = m × c × Δt
The specific heat capacity,c of water = 1 Cal/g°C or 4.184 J/g°C
Rearranging the formula;
m = Q ÷ cΔt
= 520 Cal ÷ (1 Cal/g°C×10 K)
= 52 g
Thus, the mass of water sample is 52 g
Answer:
Disease ranching
Explanation:
Floods and Droughts are caused by the enviorment. Diseases are but a product and don't affect the enviorment.
It is really very important to know where the safety equipments are placed in lab because when we know it then accident wont occur in lab . it will also helps us to feel secure while doing any kinds of experiment