Answer:
B. Convert mass percents to moles and then divide by the smallest mole value to get subscripts
Explanation:
The empirical formula is the smallest whole number ratio the elements in a compound can possess. According to this question, to derive the empirical formula of a compound from its percent composition of elements that make it up, the following steps are followed:
- First, since the elements are in percentage, one would assume the total mass of the compound is 100g and take each percentage as the mass of each element. For example, if a compound contains 16% oxygen, it means that 16g of oxygen is present.
- Next, we convert the mass of each element to moles by dividing the mass value by the molar mass of each element. For example, 16g of oxygen will be 16g/16g/mol = 1mol
- Next, we divide each mole value by the smallest mole value to get the subscript of each element that will be used in the empirical formula.
Answer:
Conduction
Explanation:
Conduction is when energy directly travels through a solid to get from one point to another.
Answer:
127K
Explanation:
Recall that the density of a gas (ρ) is related to the molar mass of the gas (M), the ideal gas constant (R), and the temperature in Kelvin (T). This relationship is described by the equation below.
ρ=PMRT
We are asked to solve for the temperature at which neon gas, Ne(g), will have a density of ρ=1.45gL. Rearrange the equation above to solve for T and substitute the given values into the equation.
ρT=PMRT=PMRρ=(0.750atm)(20.180gmol)(0.08206L atmmol K)(1.45gL)=127.2K
Therefore, after rounding to three significant figures, we find that the temperature is approximately 127K.
A: ionic salt
i've done some research and i believe it's A
Natural gas is primarily composed of methane (CH4)
Natural gas is a naturally occurring hydrocarbon mixture which is primarily composed of Methane(CH4), but it also contains ethane,propane and heavier hydrocarbon. In addition it contain small amount of nitrogen, carbon dioxide,hydrogen sulfide and traces amount of water.
