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konstantin123 [22]
3 years ago
8

Plz help me with seven eight and nine

Chemistry
1 answer:
Nookie1986 [14]3 years ago
4 0
7 is atomic symbol 9 is atomic density 8 is the atomic number
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Which scientist was able to quantify the electron's charge and estimate its specific mass? A. J. J. Thomson B. Robert Millikan C
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Millikan C

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6 0
3 years ago
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What is the configuration of all electron pairs arranged around oxygen in a water molecule?
Darina [25.2K]
I think the answer would be : Tetrahedral

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3 years ago
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A chemist designs a galvanic cell that uses these two half-reactions:
Virty [35]

Answer:

MnO4⁻ (aq) + 8H⁺ (aq) + 5Fe³⁺ (aq) →Mn(aq)²⁺ + 4H2O (l) + 5Fe²⁺(aq)

Explanation:

a)

MnO4⁻ (aq) + 8H⁺ (aq) + 5e⁻ → Mn(aq)²⁺ + 4H2O (l)

b)

5Fe³⁺ (aq) +5e⁻ → 5Fe²⁺(aq)

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8 0
2 years ago
Radar detectors use radio waves to measure the speed of moving
bagirrra123 [75]

Answer:

1.7x10^8 Hz

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Frequency could be explained as the number of occurrences of a repeating event at a time

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wavelength = 1.8 meters

The frequency f of the waves can be calculated using f = c / λ

Where c (m/s) is the speed of the wave

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6 0
2 years ago
(10 points) easy WILL GIVE BRAINLIEST
nignag [31]

Answer:

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Molecular formulas show how many atoms of each element one molecule of a compound contains. Note: Ionic compounds are generally crystalline solids with high melting points. Other compounds, however, have very different properties.

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2 years ago
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