Answer:
B. 9
Explanation:
The formula of the compound is given as:
9NaCl
Coefficient is the number before the compound. The compound here is made up of sodium and chlorine.
Therefore, we have 9 as the coefficient and it is 9 moles of NaCl.
- The compound have 1 atoms of Na
- Also 1 atom of Cl
Note, NaCl is an ionic compound.
Answer:
<u>-16200J</u>
Explanation:
(257J/g)(62.9g)
eliminate the variables
u get 16165.3
go to 3 significant digits
u get 16200
and since it is freezing we are taking out energy so it would be
-16200J
Answer:
The correct answer is d.hydrogen peroxide H₂O₂H₂O₂
Explanation:
Substances can be found in nature in different <em>aggregation states. </em>
Agreggation states can be liquid, gas or solid.
The problem asks about which substance can be found in room temperature as <em>liquid.</em> Each subtances has different physical and chemical properties that determines in which state you can find them at room temperature.
Hydrogen peroxide is the only substance listed that is in liquid state at room temperature, all other substances are in gas state at room temperature.
The correct answer is d) methane (
)
The other options are elements.
Answer:
b,d,f
Explanation:your welcome give brainilest
