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aleksklad [387]
2 years ago
10

Will has been told to check the oxygen level in a confined space, before workers are allowed to enter. Will should verify that t

he space has at least ____ % oxygen by volume.
Chemistry
1 answer:
loris [4]2 years ago
8 0
19.5%.

If you need a full explanation, let me know :]
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The equation for wave speed can be used to calculate the speed of a wave when both wavelength and wave frequency are known. Consider an ocean wave with a wavelength of 3 meters and a frequency of 1 hertz. The speed of the wave is: Speed = 3 m x 1 wave/s = 3 m/s.

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3 years ago
8. __H2 + __O2-> __H2O
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Explanation:

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2 years ago
g Determine the empirical formula for a compound that contains C, H and O. It contains 40.92% C, 4.58% H, and 54.50% O by mass.
Lady bird [3.3K]

Answer:

The empirical formula for the compound is C3H4O3

Explanation:

The following data were obtained from the question:

Carbon (C) = 40.92%

Hydrogen (H) = 4.58%

Oxygen (O) = 54.50%

The empirical formula for the compound can be obtained as follow:

C = 40.92%

H = 4.58%

O = 54.50%

Divide by their molar mass

C = 40.92/12 = 3.41

H = 4.58/1 = 4.58

O = 54.50/16 = 3.41

Divide by the smallest i.e 3.41

C = 3.41/3.41 = 1

H = 4.58/3.41 = 1.3

O = 3.41/3.41 = 1

Multiply through by 3 to express in whole number

C = 1 x 3 = 3

H = 1.3 x 3 = 4

O = 1 x 3 = 3

The empirical formula for the compound is C3H4O3

6 0
3 years ago
Plants require light to survive because Question 7 options: A. plants can only grow during the day. B. plants use the energy fro
kondor19780726 [428]

Answer:

B. plants use the energy from sunlight to produce food.

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6 0
2 years ago
Please help, thank you:))
frez [133]

Explanation:

15 8 O ---> 15 7 N + 0 1 e

Element: Oxygen

Mass Number: 16 u

Decay: Beta

238 92 U ----> 234 90 Th + -4 -2 e

Element: Uranium

Mass Number: 238.051 u

Decay: Alpha

4 0
3 years ago
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