Answer:
3,5-dimethyl-2-octene
Explanation:
The parent chain will be choosen based on the highest value. In this case, if we count from top to bottom, we'll get seven carbon, however if we count from the second carbon, going left and then down, we'll get eight carbon. So the parent chain is octene
The double bond is located at the second carbon and the methyl groups are located on carbon 3 & 5. Since there are two methyl groups, we add di- in front of methyl to indicate two methyl groups present.
Note: The functional group has to be prioritise and it needed to be a part of the parent chain. In this case, the functional group is the double bond. (alkene)
The compounds are named as 2-ethyl-4-methylheptene, 3,5-dimethyl-2-octene, 2-ethyl-4-methylheptane and 3-methyl-5-propyl-2-hexene based on the IUPAC nomenclature rules for organic compounds.
The compounds presented in your question are named based on the rules of the International Union of Pure and Applied Chemistry (IUPAC), which are used for organic compounds. Here are their names:
#SPJ2
happens when John rubs his hands?
O A. The skin on his hands rapidly conducts heat, similar to metal.
O B. He traps heat between his hands because skin is an insulator. IS
O C. The particles In his hands vibrate faster because of friction.
O D. Thermal energy moves from his fingertips to his palms.
O E. He simulates a fever that'll raise his core body temperature.
Answer:
Fairly certain it's C. The particles In his hands vibrate faster because of friction :)
Answer:
C
Explanation:
There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. The mass of NaOH needed for the solution is calculated as follows:
2 M = amount in moles of solute / 2.5 L
amount in moles of solute = 5 mol NaOH
amount in grams = 5 x 40 = 200 grams NaOH
Mass = 200 g
Molarity is the amount of solute dissolved per unit volume of solution. It is expressed as,
Molarity = Moles / Volume of Solution ----- (1)
Data Given;
Molarity = 2.0 mol.L⁻¹
Volume = 2.5 L
M.Mass = 40.0 g.mol⁻¹
First calculate Moles as,
Moles = Molarity × Volume
Putting Values,
Moles = 2.0 mol.L⁻¹ × 2.5 L
Moles = 5 mol
Secondly, calculate Mass using following formula,
Moles = Mass ÷ M.Mass
Solving for Mass,
Mass = Moles × M.Mass
Putting Values,
Mass = 5 mol × 40.0 g.mol⁻¹
Mass = 200 g
Add 200 g of NaOH in a Volumetric Flask and add distilled water upto the mark of 2.5 L. Shake it and you have prepared a 2.5 L of 2.0 M solution of NaOH.
Answer:
V = 0.167L
Explanation:
We can use the ideal gas law:
PV = nRT
where P, V, and T are pressure, volume, and temperature (Kelvin only). R is the gas constant and n is the moles of gas.
We want the volume of gas when the moles changes. Let's set up two equations, 1 for each state. Since both temperature and pressure are constant, we can simply use the terms P and T both states.
Initial (0.553 moles and 253 ml)): P*(0.253L) = (0.553 moles)RT
Second (0.365 moles, unknown volume, V): P*V = (0.365 moles)RT
P*(0.253L) = (0.553 moles)RT
P*V = (0.365 moles)RT
Lets set these up as a ratio:
P*(0.253L)/P*V = ((0.553 moles)RT)/((0.365 moles)RT)
P, T and R all cancel to 1, and the moles unit cancels:
(0.253L)/V = (0.553)/((0.365)
The ratio of the volumes is in direct proportion with the ratio of the moles.
Rearrange and solve:
(0.253L) = (0.553)/((0.365)V
(0.253L)*(0.365/0.553) = V
V = 0.167L
a decrease in solubility
no change in the solubility
a slower reaction
If the solution process is endothermic, then an increase in temperature usually results in an increase in solubility. Their heat of reaction is usually positive. The rest of the choices do not answer the question above.
Answer:
solubility increases
Explanation: