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slamgirl [31]
3 years ago
6

Please help! What frequency of sound wave does boat sonar use? A. kilowatts B.electromagnetic C. ultrasound D.infrasound

Chemistry
1 answer:
aniked [119]3 years ago
5 0

Answer:

c ultrasound. that wasn't toohard

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Which term best describes the molecular geometry of ethylene, C₂H₄?
marusya05 [52]
The molecular geometry is trigonal planar. I would choose E
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3 years ago
Complexes containing metals with d10 electron configurations are typically colorless because ________. Complexes containing meta
algol [13]

Answer:

there is no d electron that can be promoted via the absorption of visible light

Explanation:

One of the properties of transition elements is the possession of incompletely filled d orbitals. This property accounts for their unique colours.

The colours of transition metal compounds stem from d-d transition of electrons due to the presence of vacant d orbitals of appropriate energy to which electrons could be promoted.

For elements whose atoms have a d10 configuration, such vacant orbitals does not exist hence their compounds are not colored.

Sometimes, the colour of transition metal compounds stem from ligand to metal charge transfer(LMCT) for instance in KMnO4.

8 0
3 years ago
If the initial volume is 55ml and the final volume after some rocks of sandstone are added is 65ml what is the volume of the chi
AfilCa [17]

Answer:

Volume = 10ml

Density = 1/5 g/ml or 0.20g/ml

Explanation:

The rocks are 10ml since the initial volume went up by 10.

Since density = mass/volume, you divide 2 by 10.

D = 2/10

D = 1/5 g/ml or 0.20g/ml

(Unit is g/ml aka grams/millileter)

7 0
3 years ago
Which type of radioactive decay can pass through the body? A.alpha emission B.beta emission C.positron emission D.gamma rays
TEA [102]
A beta emission radioactive decay can pass through the body.
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3 years ago
Which spheres are part of the earth system
zubka84 [21]

Answer:

Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).

Explanation:

8 0
3 years ago
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