Answer:
- <em>There are </em><u><em>3 </em></u><em>hydrogen atoms in the representative particle of Al(OH)₃</em>
Explanation:
- Al(OH)₃ is the chemical formula for the r<em>epresentative particle of aluminum hydroxide</em>.
- Since Al (aluminum) has not any subscript associated, it is understood that there is 1 atom of aluminum in each representative particle of Al(OH)₃.
- Since the subscript 3 is after a parenthesis, it affects all the atoms that are inside such parenthesis. This leads to:
- there are 3 atoms of oxygen in each representative particle of Al(OH)₃, and
- there are 3 atoms of hydrogen in each representative particle of Al(OH)₃.
Answer:
2 significant figures
Good luck with your work! :)
Answer:
D. Chlorine is reduced in reaction 1 and iron is oxidized in reaction 2.
Explanation:
- Reduction is the process where by the Oxidation number or state of an element or substance is reduce.
- Oxidation is the increase in oxidation number or state of any element or substance
Answer:
The correct option is methane :
.
Explanation:
Average speed of the gas molecules id given by expression:
k = Boltzmann cosnatnt
T = Temperature of the gas molecules = 355 K
m = molecular mass of the molecule
Molar mass of methane = 18 g/mol
Molar mass of neon = 20.18 g/mol
Molar mass of ethene = 28 g/mol
Molar mass of chlorine gas = 70 g/mol
Lower the value of molar mass of gas molecule higher will be the average speed.So, from the given options methane gas greatest average seed because it has lowest molecular mass
When you are asked a question like this, you can always ask yourself this question. Can I change it back after this change? For example, if you are burning wood, you cannot bring it back to wood after you burn it, therefore, it is a chemical change. However, if you boil and evaporate water, you can make the water condense again back into its liquid form. In this case, you cannot bring the tomato back to its raw state. Therefore, cooking raw tomatoes is a chemical change.
