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agasfer [191]
3 years ago
10

Which is carried by waves? disturbance energy matter space

Chemistry
2 answers:
MariettaO [177]3 years ago
7 0
I believe the answer would be energy
natta225 [31]3 years ago
7 0

energy is being carried by waves.

:took the assessment

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Uranium has an atomic number of 92. How many neutrons does U-238 have?
LekaFEV [45]

Answer:

146 neutrons.

Explanation:

8 0
2 years ago
Substances that are physical combinations of two or more different types of matter are known as
Veseljchak [2.6K]

Answer:

A mixture!

Explanation:

Mixtures are a substance made of combining two or more different kinds of matter :)

Hope this helped!

7 0
3 years ago
The gas SF6 is used to trace air flows because it is non-toxic and can be detected selectively in air at a concentration of 1.0
melomori [17]

SF₆ in the air at a concentration of 1.0 ppb, exerts a partial pressure of 1.0 × 10⁻⁹ atm. At this concentration, 2.3 × 10¹⁰ molecules of SF₆ are contained in 1.0 cm³ of air at 46 °C.

First, we will calculate the partial pressure of SF₆  using the following expression.

pSF_6 = P \times \frac{ppb}{10^{9} }

where,

  • pSF₆: partial pressure of SF₆
  • P: total pressure of air (we will assume it is 1 atm)
  • ppb: concentration of SF₆ in parts per billion

pSF_6 = P \times \frac{ppb}{10^{9} } = 1 atm \times \frac{1.0 ppb}{10^{9} } = 1.0 \times 10^{-9} atm

Then, we will convert 1.0 cm³ to L using the following conversion factors:

  • 1 cm³ = 1 mL
  • 1 L = 1000 mL

1.0 cm^{3} \times \frac{1mL}{1cm^{3}} \times \frac{1L}{1000 mL} = 1.0 \times 10^{-3} L

Next, we will convert 46 °C to Kelvin using the following expression.

K = \° C + 273.15 = 46 + 273.15 = 319 K

Afterward, we calculate the moles (n) of sulfur hexafluoride using the ideal gas equation.

P \times V = n \times R \times T\\n = \frac{P \times V}{R \times T}  = \frac{1.0 \times 10^{-9} atm  \times 1.0 \times 10^{-3} L}{(0.082 atm.L/mol.K) \times 319 K} = 3.8 \times 10^{-14} mol

Finally, we will convert 3.8 × 10⁻¹⁴ mol to molecules using Avogadro's number.

3.8 \times 10^{-14} mol \times \frac{6.02 \times 10^{23} molecules  }{mol} = 2.3 \times 10^{10} molecules

SF₆ in the air at a concentration of 1.0 ppb, exerts a partial pressure of 1.0 × 10⁻⁹ atm. At this concentration, 2.3 × 10¹⁰ molecules of SF₆ are contained in 1.0 cm³ of air at 46 °C.

You can learn more about partial pressure here: brainly.com/question/13199169

6 0
3 years ago
Chemical Reaction
Zina [86]

Answer:

I think that frying an egg is a chemical because it takes in heat in order to make the reaction occur.

6 0
3 years ago
A sample of gas occupies 1.2 L at 12.0oC. Assuming pressure remains the same, what would be the volume (in L) of this gas at 67o
liraira [26]
V1/T1 = V2/T2
V1 = 1.2 L
T1 = 12.0 + 273 = 285 K
T2 = 67.0 +273 = 340 K

1.2/285 = V2 / 340
V2 = 1.4 L
3 0
3 years ago
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