Answer:
The halogen bulb lasts longer because the filament lasts longer. It can have twice the life of an incandescent and use the same amount or slightly less (10%) electricity.
Explanation:
Answer: The strong force binds quarks together in clusters to make more-familiar subatomic particles, such as protons and neutrons. It also holds together the atomic nucleus and underlies interactions between all particles containing quarks.
Explanation:
I would predict the color to be yellow-orange because the first element in the formula, and
also the metal, is sodium and therefore would fall under the other sodium formulas that
<span>produced a yellow-orange color.</span>
Answer:
The process can be represented as shown in the figure below; having got the diagram, we can solve for the questions.
A. the number of moles of gas used
n = PV/ RT = (1.013 *10^5 Pa) * (5.0 *10^-3 m^3) / (8.314 * 300)
n = 5.065 * 10^2 / 2494.2
n = 0.00203 *10^2
n = 0.203 moles
B. Temperature at point C (Tc)
Pa/Ta= Pb/Tb
Tb = Pb *Ta / Pa
Tb = 3 * 300 / 1
Tb = 900 K
Since Tb = Tc = 900 K
C. For process AB,
work done is zero
For process BC,
work done = -nRTbln (Vc/Vb)
W = -(0.203 * 8.314 * 900 ln (3)
W = -(1.518 kJ ln 3
W = -1.67 kJ
For process CA,
W = -P V =-nRT
W = -(0.203 * 8.314 * (-600))
W = 1.01 kJ
Explanation:
Answer:
0.178 M
Explanation:
First we <u>determine the molar mass of NaOH</u>, using the <em>given molar masses </em>of the elements:
- Molar Mass of NaOH = Molar Mass of Na + Molar Mass of O + Molar Mass of H
- Molar Mass of NaOH = 40 g/mol
Then we<u> convert 5.000 grams of NaOH into moles</u>, using its <em>molar mass</em>:
- 5.000 g ÷ 40 g/mol = 0.125 mol
Now we <u>convert 700.0 mL into L</u>:
- 700.0 mL / 1000 = 0.700 L
Finally we <u>calculate the molarity of the solution</u>:
- Molarity = moles / liters
- 0.125 mol / 0.700 L = 0.178 M