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klasskru [66]
3 years ago
11

Which statement is true about the speed of light? (2 points) Light travels relatively slowly. Distance in space is measured usin

g the speed of light. Time in space is measured using the speed of light. The speed of light is unknown.
Chemistry
2 answers:
melamori03 [73]3 years ago
6 0

Distance in space is measured using the speed of light.

MaRussiya [10]3 years ago
5 0

Answer:

Distance in space is measured using the speed of light.

Explanation:

I took the test

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If air has a dry-bulb temperature of 2°C
Allisa [31]

Answer:

The relative humidity is 36%.

Explanation:

Relative humidity is the measure of ratio of actual vapor density to saturated vapor density in a given system. So there are different ways to measure the relative humidity in the atmosphere. One of the common ways is to measure using Psychrometer. In this instrument, two different thermometers are used as measuring device. One of the thermometer measures the humidity in dry air and another in wet air. So the difference of the temperature of dry and wet air bulb will be related to determine the relative humidity percentage. The formula to determine the relative humidity using this method is as below.

Relative humidity=\frac{(e_{w}-[N*(1+0.00115*T_{w}*(T_{d}-T_{w}))])*100}{e_{d} }

Also,

e_{d}=6.112*e^{[\frac{(17.502*T_{d} )}{(240.97+T_{d} )}]}

And,

e_{w}=6.112*e^{[\frac{(17.502*T_{w} )}{(240.97+T_{w} )}]}

Here e =2.718, T_{d} and T_{w} are the temperature at dry bulb and wet bulb temperatures, respectively.

So, the relative humidity after substituting the values of Td = 2 C and Tw = -2 C is 36%.

6 0
3 years ago
can someone explain in detail how molar mass, Avogadro's number, and volume are all connected through moles? Im so confused :(
sashaice [31]

Answer:

See Explanation

Explanation:

By definition, 1 mole is the mass of substance (or, formula mass in grams) containing 1 Avogadro's Number (N₀ = 6.02 x 10²³) of particles. That is ...

1 mole of hydrogen atoms (H) = 1.00794 grams

1 mole of molecular hydrogen (H₂) =  2.01588 grams

1 mole of any substance = 1 formula weight in grams

1 mole = 1 Avogadro's Number (N₀) = 1 formula weight in grams

In the concept of 'gas laws' 1 mole of any (all) gas at STP conditions ( => 0°C & 1 atmosphere pressure) occupies 22.4 Liters & is known as the 'molar volume' of a gas at STP. If the temperature &/or pressure change the volume will not be 22.4 Liters.

For reactions whose coefficients are balanced to the lowest whole number values (i.e., no fractional coefficients) the equation is known as the 'standard reaction' and conditions  are assumed to be STP and the coefficients of gas phase components indicate molar volumes. Example ...

Given   N₂(g) + 3H₂(g) => 2NH₃(g)  is assumed to be at 0°C; 1 Atm pressure.

Molecular Nitrogen = 1 molar volume = 22.4 Liters of N₂(g)

Molecular Hydrogen = 3 molar volumes = 3 x  22.4 Liters of H₂(g) = 67.2 Liters of H₂(g)

Molecular Ammonia = 2 molar volumes = 2 x 22.4 Liters of NH₃(g) = 44.8 Liters of NH₃

8 0
3 years ago
What molecules can produce more energy per gram than sugars and are used for storing energy in animals?
creativ13 [48]
The answer is C. lipids.
5 0
3 years ago
Ocean water is approximately 0.6 M NaCl. How many grams of salt is there in 1 liter of ocean water?
ollegr [7]

The answer is A.

We know the formula for molarity :

<u>Molarity = Number of moles ÷ Volume</u>

<u />

Let's assume there are 0.6 moles of NaCl in 1 liter of ocean water.

Then, mass of salt is :

  • Mass of one mole salt × 0.6
  • 58.5 × 0.6
  • 35 grams
8 0
2 years ago
Overall, how many studies showed a positive effect of organic farming on biodiversity?.
Umnica [9.8K]

A positive effect of organic farming on abundance was found in 96 of 117 studies

6 0
3 years ago
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