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Deffense [45]
3 years ago
7

Which of the following pairs would have the greatest coulombic attraction in a solid compound? 1. mg2+, S2- 2. mg2+, se2- 3.mg2+

, O2-
Chemistry
1 answer:
Kamila [148]3 years ago
5 0

Your answer would be 3. mg2+,O2

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Which of the following drives global thermohaline (conveyor belt) circulation?
lana66690 [7]

changes in density

Explanation:

The global thermohaline (conveyor belt) circulation is caused by changes in global ocean density.

The ocean water density is determined by the temperature and salt content of the ocean (thermo - heat and haline - salt).

  • Surface current drives warm and less water away for the equator towards the poles.
  • At the poles they become cold  and very dense sinking to the bottom and moving towards the equator back.
  • It is also called the ocean conveyor belt

learn more:

Ocean current brainly.com/question/4117397

#learnwithBrainly

7 0
3 years ago
Silver has a density of 10.5 grams/cm3. What would be the mass of a 5 cm3 piece of sliver
enyata [817]

Answer:

52.5 g

Explanation:

Density= mass/volume

Rearranging the equation gives us m= d(V)

m= d(V)

m= (10.5 grams/cm^3)(5 cm^3)

m= 52.5 g

8 0
3 years ago
A chemist measures the energy change ?H during the following reaction: 2HgO (s) ?2Hg (l) +O2 (g) =?H182.kJ Use the information t
Elan Coil [88]

Answer:

A. endothermic.

A. Yes, absorbed.

Explanation:

Let's consider the following thermochemical equation.

2 HgO(s) ⇒ 2 Hg(l) + O₂(g)  ΔH = 182 kJ

The enthalpy of the reaction is positive (ΔH > 0), which means that the reaction is endothermic.

182 kJ are absorbed when 2 moles of HgO react (molar mass 216.59 g/mol). The heat absorbed when 72.8 g of HgO react is:

72.8g.\frac{1mol}{216.59g} .\frac{182kJ}{2mol} =30.6kJ/mol

6 0
3 years ago
How many moles of sodium ions are present in 0.25 kg of a 2.0 m solution of sodium chloride in water
LenKa [72]

0.50 is the answer on edge

8 0
3 years ago
Determine the number of significant figures in 478 cm​
Grace [21]

Answer:

There are 3 significant figures on this one.

3 0
2 years ago
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