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ira [324]
2 years ago
9

Silver nitrate is reacted with magnesium bromide and two products are formed.

Chemistry
1 answer:
Sati [7]2 years ago
8 0

Answer:

<u><em>The correct answer is : </em></u>

         a silver nitrate solution (AgNO3) is mixed with a solution of magnesium bromide (MgBr2). The balanced reaction would be: 2 AgNO3(aq) + MgBr2 --> 2 AgBr + Mg(NO3)2

<u><em>the last one </em></u>

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What type of front in which warm air mass is cut off from the ground by cool air beneath it?
vodomira [7]

Answer:

Occluded Front

Explanation:

"Occluded Front Forms when a warm air mass gets caught between two cold air masses. The warm air mass rises as the cool air masses push and meet in the middle. The temperature drops as the warm air mass is occluded, or “cut off,” from the ground and pushed upward."

  - www.eduplace.com › science › hmxs › pdf

7 0
3 years ago
A salt contains only barium and one of the halide ions. A 0.158 g sample of the salt was dissolved in water, and an excess of su
Delvig [45]

Answer:

BaBr2

Explanation:

Halide ions are the ions of the elements of group 17 (or 7A), which have 7 electrons in their valence shell, so they need to gain one electron to be stable. If we noted as X the halide, the ion must be X^{-}.

Barium is a metal of group 2 (or 2A) and has 2 electrons in its valence shell, so it must lose these 2 electrons to be stable, and it will form the anion Ba^{2+}. These elements will form an ionic bond, with formula BaX2.

Sulfuric acid has formula H2SO4, and the reaction is:

BaX2 + H2SO4 --> BaSO4 + 2HX

So, for the stoichiometry between BaX2 and BaSO4, and denoting by <em>y</em> the molar mass of the halide, and the molar mass of BaSO4 = 137.33 g of Ba + 32.06 g of S + 4x16 g of O = 233.39

1 mol of BaX2 ------------- 1 mol of BaSO4

(137.33 + 2y) g of BaX2 ------------ 233.39 g of BaSO4

0.158 g of BaX2 --------------------- 0.124 g of BaSO4

By a simple direct three rule:

0.124x(137.33 + 2y) = 0.158x233.39

17.02892 + 0.248y = 36.87562

0.248y = 19.8467

y = 19.8467/0.248

y = 80.03 g/mol

By consulting the periodic table, the halide element that has a molar mass close to 80.03 g/mol is Bromide (Br), which has molar mass 79.9 g/mol. So the salt has formula BaBr2.

8 0
3 years ago
Students are attempting to demonstrate a reaction of liquid water separating into hydrogen and oxygen gases:
AlexFokin [52]

Answer:

B.

Explanation:

When water separates into hydrogen and oxygen gas, a decomposition reaction is taking place (one substance breaking apart or breaking down into two or more substances).

The law of conservation of mass tells us that mass is not created or destroyed during a chemical reaction, so the total mass will remain the same. This is supported by the diagram on the page, which shows that in the reactants, there are four hydrogen atoms and two oxygen atoms, and this amount is the same on the product side.

5 0
3 years ago
if 4.12 L of 0.85-M H3PO4 solution is be diluted to a volume of 10.00 L,what is the concentration resulting solution
Alja [10]

Answer:

The concentration resulting solution = 0.350 M

Explanation:

In case of dilution , the following formula can be used -

M₁V₁ = M₂V₂

where ,

M₁ = initial concentration ,

V₁ = initial volume ,

M₂ = final concentration , i.e. , concentration after dilution ,

V₂ = final volume .

from , the question ,

M₁ = 0.85 M

V₁ = 4.12 L

M₂ = ?

V₂ = 10.0 L

Using the above formula , the molarity of the final solution after dilution , can be calculated as ,

M₁V₁ = M₂V₂

0.85 M * 4.12 L =  M₂ * 10.0 L

M₂ = 0.85 M * 4.12 L  / 10.0 L

M₂ = 0.350 M

5 0
3 years ago
Calculate the energy for one mole of photons (an einstein) for light absorbed at 6.90 × 102 nm.
Kay [80]
We know that:
f * λ = c 
<span>and
E = h*f
so,rearranging:
 </span> 
<span>E/h = C/λ 
given:
h = </span><span>6.90 × 10^2 nm

</span><span>substituting the values:

E = </span> C/λ<span> x h  
(c is the speed of light;that is 3x10^8 m/s)

</span>    = 3x10^8 x 6.626x10^-34 / 6.90 x10^7m x 6.022x10^23
Hence,
using calculator:
we get,
 E = 1.69 x 10^5 Joules
5 0
3 years ago
Read 2 more answers
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