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astra-53 [7]
4 years ago
10

Nagine you are repeatedly lifting a weight into the air up to a height of 2 m. Assuming in each litt

Chemistry
1 answer:
Mariulka [41]4 years ago
8 0

Answer:

A

Explanation:

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Which has a higher mass percent of magnesium mgo or mg3n2?
vampirchik [111]
The  compound  that  has   higher  mass percent  is  Mg3N2  which is 72%


explanation
calculate  the %  mass  of Mg  in each  compound

%  composition  of  mg= molar mass of  Mg/  total  molar  mass  of the compound  x100

in MgO  =  24 /40  x100 = 60%

in Mg3N2  =72/100 x100  =  72 %

therefore  the % composition  in Mg3N2  is higher

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3 years ago
An electron is in a region outside the nucleus
harkovskaia [24]
Is that a question? Doesnt seem like it
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3 years ago
Calculate the number of oxygen atoms and its mass in 50g of CaCo3<br>​
xz_007 [3.2K]

The number of oxygen atoms = 3

Mass = 24 g

<h3>Further explanation</h3>

The formula of a compound shows the composition of the constituent elements

CaCO₃ is composed of 3 types of elements, namely Ca, C and O

The amounts of each of these elements in the compound CaCO₃:

  • Ca = 1
  • C = 1
  • O = 3

So the number of oxygen atoms = 3

mass of Oxygen :

\tt mass~O=\dfrac{3\times Ar~O}{MW~CaCO_3}\times mass~CaCO_3\\\\mass~O=\dfrac{3\times 16}{100}\times 50=24~g

5 0
3 years ago
What element has the electrons configuration of [Ar]4s^2 3d^5
Scilla [17]

Answer:

Manganese

Explanation:

Using rules you will find the location on 3d^5 because you subtract one level when in the d block

5 0
3 years ago
Hello, I need some help writing a paragraph about the water cycle! If u can write a paragraph EXPLAINING the water cycle i would
Serhud [2]

Answer:

The water cycle, also known as the hydrologic cycle or the hydrological cycle, describes the continuous movement of water on, above and below the surface of the Earth. The mass of water on Earth remains fairly constant over time but the partitioning of the water into the major reservoirs of ice, fresh water, saline water and atmospheric water is variable depending on a wide range of climatic variables. The water moves from one reservoir to another, such as from river to ocean, or from the ocean to the atmosphere, by the physical processes of evaporation, condensation, precipitation, infiltration, surface runoff, and subsurface flow. In doing so, the water goes through different forms: liquid, solid (ice) and vapor. Hope this helps, mark as brainliest please!

4 0
3 years ago
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