Answer:
homogenous mixture
Explanation:
homogenous mixtures appear in one phase and have even particle distribution.
In africa wood is used as one, cooking and heating sources, and two, firewood is used as a power and energy resource. now summarize these points for credit.
Answer:
calcium strontium barium radium
Elements are grouped into periods and groups . Elements with same number of energy shells are in the same period and elements with the same number of electrons in the outermost energy shells are in the same group.
Reactivity depends on the number of valence electrons. Number of valence electrons the element has will determine if the element needs to gain electrons or give out electrons.
Therefore elements with same number of valence electrons will have similar chemical properties .
When you look at elements in the same group(column) they have similar chemical properties
Answer:
130 moles of water might be produced by the reaction.
Explanation:
We state the equation for production of water:
2H₂(g) + O₂ (g) → 2H₂O (l)
Moles of hydrogen: 130
Moles of oxygen: 60
We state that the limting reactant is the oxygen
For 2 moles of hydrogen, we need 1 mol of oxygen
For 130 moles of hydrogen, we would need 65 moles, and we only have 60. Ratio is 2:1
1 mol of O₂ can produce 2 moles of water
Then, 60 moles of O₂ will produce (60 . 2) /1 = 130 moles
