Answer:
10.56g
Explanation:
From the reaction equation, we can see that it is unbalanced. In the balanced state, 2 moles of KClO3 will yield 3 moles oxygen.
Let's calculate the actual number of moles now. We first divide the mass of the KClO3 by the molar mass. Molar mass of KClO3 = 39 + 35.5 + 3(16) = 122.5g/mol
The number of moles is thus 26.4/122.5 = 0.22 mole
If 2 moles KClO3 gave 3 moles O2, this means 0.22 moles will give (0.22 × 3)/2 = 0.33 mole
To calculate the mass of oxygen formed, we multiply the molecular mass of oxygen molecule by the number of moles
The molecular mass of oxygen molecule = 16 × 2 = 32g/mol
The mass formed = 32 × 0.33 = 10.56g
Answer:
B
Explanation:
Bias may make one side look worse than they actually are.
a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
Answer: The protection of the environment.
Explanation: An ecologist refers to an individual who handles the ecosystem and its constituents to perform surveys and evaluate the behavior and diversity of various species. They examine the association between the surrounding and its living things. They work for environmental consulting agencies, NGOs, and the government, and helps them in doing research and creating protocols and rules for the protection of the environment.
