When multiplying numbers, the term with the least significant digits gives how many significant digits will be in the answer. 2.995 has the least with 4 "sig figs", so the answer will have 4 significant digits as well:
2.995/0.16685 = <span>17.9502547198
</span> ↑↑ ↑<span>↑
4 sig figs
So the answer is 17.95.</span>
Answer:
Inference — The candle stayed lit longer because the plant gave off oxygen.
Observation — The candle went out when it was placed in a closed jar.
Observation — The candle stayed lit longer in closed jar when a plant was present.
Explanation:
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Answer:
a. Yes
b. 143.5 mmHg
Explanation:
The vapor pressure is the pressure of the vapor that is in equilibrium with the liquid. At a constant temperature, some molecules of the liquid will vaporize, and then will do pressure at the surface of the liquid.
If the pressure at the container is higher then the vapor pressure, the liquid will evaporate.
a. Let's calculate the pressure at the container by the ideal gas law:
PV = nRT
Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant (62,364 mmHg.mL/mol.K), and T is the temperature.
The molar mass of CH₃I is 142 g/mol
n = mass/ molar mass
n = 0.453/142
n = 0.0032 mol
P*370 = 0.0032*62,364*266
370P = 53,084.24
P = 143.5 mmHg
So, all the liquid will evaporate.
b. Because all liquid evaporates, when the equilibrium is reached, the pressure is the gas pressure: 143.5 mmHg.
Answer is: d. increases.
<span>The velocity of sound in seawater changes with water pressure, depth, temperature and salinity.
</span>Velocity can be calculeted using Del Grosso's equation, the UNESCO equation (<span>International Standard algorithm)</span> or <span>Mackenzie equation.
To measure velocity navy use </span>Expendable Bathy Thermograph.
<h2>Hello!</h2>
The wave with the lowest frequency is the second one.
<h2>Why?</h2>
Frequency is defined as the number of times that a periodic phenomenon is repeated in a given time. Regarding waves, the frequency of a wave is the number of times that a wave repeats in a unit of time. Frequency is measured in Hertz (Hz=1/s).
The relationship between frequency and wavelength is inverse, meaning that longer wavelengths mean lower frequencies. From the given list, the wave with the longest wavelength is the second one, meaning that its frequency is the lower.
Have a nice day!
