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Basile [38]
2 years ago
14

I need help ASAP

Chemistry
1 answer:
vova2212 [387]2 years ago
8 0

Answer:

1.4 g/cm3

Explanation:

Density = Mass/Volume

Mass = 21g

Volume = 15cm3

Density = 21/15 = 1.4

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1. What is the name for rise of deeper water to the surface?
Vikentia [17]

Upwelling

Explanation:

The rise of deeper water to the surface is called upwelling.

Upwelling is a term used in oceanography to describe the rise of cold and denser water to the surface.

  • This occurs usually along the short where wave action is very prevalent.
  • Surface wave pushes away warm water.
  • Then deeper nutrient-rich cold water rises due to low density and volume of water on top.
  • This nutrient rich water supports biological activities because they are rich.
  • Wind along the coast can also force surface water down.

learn more:

Ocean density brainly.com/question/6760255

#learnwithBrainly

3 0
3 years ago
H+(aq) + OH–(aq) → H2O(l) + 55.8 kJ In this reaction there is conservation of
pentagon [3]
In the equation given above, there is conservation of MASS, CHARGE AND ENERGY.
These three parameters are usually conserved during the course of chemical reactions. When any of these parameter experience a reduction during the course of chemical reaction, such loss is always gained by other elements involved in the same reaction, so that at the end of the day, they are not considered as lost. 
4 0
3 years ago
How moles are in 45.7g of CH3?
miskamm [114]

first find the atomic weight of CH3 which would be

atomic weight: 12.011 (3×1.008) = 36.32 g/mol

then find the moles in the given mass

36.32 ÷ 45.7 = 0.794

I HOPE I'M NOT WRONG I HAVENT DONE CHEM IN SO LONG

6 0
3 years ago
what happens to the average kinetic energy of ideal gas molecules when the pressure of the gas is increased by reducing the volu
Margarita [4]

Answer:

The pressure of the gas is increased by reducing the volume at constant temperature. ... The average velocity of the molecules is increased by a factor of 2.

Explanation:

4 0
2 years ago
How many moles of mgs2o3 are in 193 g of the compound?
Mashutka [201]

Answer:

             1.414 Moles

Solution:

Data Given:

                 Mass of MgS₂O₃  =  193 g

                 M.Mass of MgS₂O₃  =  136.43 g.mol⁻¹

                 Moles  =  ?

Formula Used:

                            Moles  =  Mass ÷ M.Mass

Putting values,

                            Moles  =  193 g ÷ 136.43 g.mol⁻¹

                            Moles =  1.414 mol

8 0
3 years ago
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