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nalin [4]
4 years ago
13

Halogens combine with most metals to form _ such as _

Chemistry
1 answer:
Mekhanik [1.2K]4 years ago
7 0
Covalent bonds such as Sodium Fluoride.
You might be interested in
Help! awarding 20 points ​
aalyn [17]

a. The circulatory system in fish is one-directional while it is two-directional in humans.

b. P has a high concentration of carbon dioxide and low oxygen concentration whereas Q has high oxygen concentration and low carbon dioxide concentration.

<h3>What is the circulatory system?</h3>

The circulatory system is the system of organism and tissues which help to transport blood and other fluids through the body of a living organism.

The organs of the circulatory system include:

  • The heart
  • The blood vessels - veins, arteries, capillaries

a. In the given diagram sowing the circulatory system of man and the fish, it can be seen that the direction of blood flow in the fish is one way through the heart. However, in humans, the direction of blood flow is two-way through the heart.

b. The gas in P has a high concentration of carbon dioxide and low oxygen concentration. However, the gas flowing through Q has high oxygen concentration and low carbon dioxide concentration.

In conclusion, the circulatory system is important in the exchange of gases in the body.

Learn more about circulatory system at: brainly.com/question/3597250

#SPJ1

5 0
2 years ago
The mass number refers to the totaol number of _____and_____which can be found int he nucleus of the atom
Gnom [1K]
The mass number refers to the total number of protons and neutrons which can be found in the nucleus of the atom.
8 0
3 years ago
Pure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen. when 2.59 g of magnesium ribbon bu
stepan [7]
Burning Mg in the air and reacting with O2 forming a white powder of MnO

So the equation is going to be:
Mn + O2 ⇒ MnO (this equation is not conserved)

to make it equilibrium:
1- First we should put 2Mno to equal the O2 on both sides.
So it will be:
Mg + O2⇒ 2MgO
2- Second we should put 2Mn to equal the Mn on both sides.
2Mg + O2⇒ 2MgO (this equation is conserved)
After putting the physical states the final equilibrium equation is going to be:
                        Δ
2Mg(s) + O2(g)⇒ 2MgO(s)

 

4 0
4 years ago
Solutions of sodium sulfate and silver nitrate are mixed together.
Vera_Pavlovna [14]

Answer:

<em>The correct option is a) Precipitate: silver sulfate </em>

<em> </em>

<em>Net Ionic: 2Ag+ +  SO42 →Ag2SO4</em>

Explanation:

When sodium sulfate reacts with silver nitrate, the following reaction occurs:

2AgNO3 + Na2SO4  → Ag2SO4 + 2NaNO3

The NaNO3 is easily soluble in water. However, silver ions form an insoluble solid with SO4. The Ag+ in this compound will be a cation having a positive charge. The SO4- will be an anion having an negative charge.

The table with solubility rules show that the sulfates of  Ag+, Ca+, Sr2+, Ba2+, Hg22+ and Pb2+ are insoluble.

5 0
3 years ago
In a constant-pressure calorimeter, 55.0 mL of 0.340 M Ba(OH), was added to 55.0 mL of 0.680 M HCI. The reaction caused the temp
Brut [27]

Answer:

Ba(OH)2 + 2 HCl → BaCl2 + 2 H2O

The reactants are present in equimolar amounts, so there is no excess or limiting reactants.

(0.0500 L) x (0.600 mol/L HCl) x (2 mol H2O / 2 mol HCl) = 0.0300 mol H2O

(4.184 J/g·°C) x (50.0 g + 50.0 g) x (25.82 - 21.73)°C = 1711.256 J

(1711.256 J) / (0.0300 mol H2O) = 57042 J/mol = 57.0 kJ/mol H2O

Explanation:

4 0
3 years ago
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