2Ca + 2H2O —-> Ca(OH)2 + H2
In a chemical reaction, the atoms of the starting species called reactants rearrange to form new substances which are the products of the chemical reaction. The identities of the atoms involved in the reaction remain the same. Their number also stays the same before and after the reaction
Answer:
1,6,8
Explanation:
Periodic Table- H=1.C=6,O=8
Hydrogen is H, Carbon is C, Oxygen is O
Answer:
See explanation
Explanation:
1) a precipitate of lead chloride would be observed if the concentrations of both reagents was high enough and the temperature was low enough
2) A gelatinous white-ish precipitate would be observed at first, though i'm not sure what would happen with excess ammonia. The precipitate would likely not dissolve in excess ammonia
Answer:
B
Explanation:
If you convert all the options to standard form and compare the relative exponents and values, one can now decide which one is the highest.
A quick comparison shows that option B. This value thus represents the highest activity among the options listed in the question. Hence the answer provided above.