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Mnenie [13.5K]
4 years ago
8

Studies involving humans or animals are conducted under strict policies and procedures. This solution addresses which limitation

?
Chemistry
2 answers:
RideAnS [48]4 years ago
8 0
Ethical concerns is the answer

arsen [322]4 years ago
5 0
It is ethical concerns
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What is the mass of 4.91 x10^21 platinum atoms?
irina [24]

To calculate the mass, go from atoms to moles and moles to grams:

Atoms ........ Moles.......... Grams

From atoms to moles, use the Avogadro’s no. which is 6.022 x 10^23 and from moles to grams use atomic mass of Pt that is 195.08g.

So, 4.91 x 10^21 Pt atoms x (1 mole Pt / 6.022x10^23 Pt atoms) x (195.08g Pt / 1 mole Pt) = 1.59g Pt

Mass of 4.91 x 10^21 Pt atoms = 1.59g Pt

7 0
3 years ago
Read 2 more answers
Formula for Manganese Bromide Tetrahydrate
Lelu [443]

Answer:

I believe the molecular formula is MnBr2·4H2O or Br2H8MnO4

Explanation:

5 0
3 years ago
What is one condition that is necessary for a hurricane to form?
zhuklara [117]

Explanation:

Thunderstorms, warm ocean water and light wind are needed for a hurricane to form (A). Once formed, a hurricane consists of huge rotating rain bands with a center of clear skies called the eye which is surrounded by the fast winds of the eyewall (B).

8 0
3 years ago
Which of the worlds oceans is mostly made of ice?<br> Please hurry and God bless and stay safe! :)
Aneli [31]

Answer:

The Artic Ocean

Explanation:

it is mostly surrounded by land with only a bit of exchange of water with the other oceans

4 0
3 years ago
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Cuando realizamos la "Estructura de
sergeinik [125]

Answer:

Electrones de valencia.

Explanation:

¡Hola!

En este caso, dado en química se conocen las estructuras de Lewis como representaciones gráficas de como los elementos están enlazados entre sí, debemos tener en cuenta que estos enlaces se forman entre los electrones de valenciam, los cuales son utilizados para su representación. Se sabe que los electrones de valencia son representados con puntos alrededor del elemento a través de puntos que se unen entre sí y son el número de electrons en la capa más externa de los elementos en cuestión; por ejemplo, cloro tiene 7 electrones de valencia, azufre tiene 6, hidrogeno 1, carbono 4 y así sucesivamente.

¡Saludos!

3 0
4 years ago
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