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nordsb [41]
2 years ago
11

What is the formula for manganese (ii) fluoride decahydrate? (you may use a * to represent the dot in the formula.)?

Chemistry
2 answers:
Rasek [7]2 years ago
4 0
These types of molecules are called hydrates. They have a certain number of moles attached to the salt. Their characteristic is being hygroscopic. That means that when they are exposed to air, they readily solvate. 

The formula for Manganese Fluoride Decahydrate will involve the formula Mn, F and H₂O. In ionic form, Manganese is Mn⁺² while fluoride is in F⁻. When they are brought together, their superscripts are 'cross-multiplied' and becomes their respective subscripts. The compound becomes MnF₂. Then, we add the decahydrate which means 10 moles of H₂O. Hence, the formula for Manganese Fluoride Decahydrate is MnF₂*10H₂O.
goblinko [34]2 years ago
3 0

Answer:

MnF₂*10H₂O.

Explanation:

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Which elements have electron configurations that end in ns 2 np 5 ? halogens noble gases inner transition metals transition meta
4vir4ik [10]
HALOGENS have 7 electrons in their final shell regardless if the total number of atoms.  These 7 electrons would be shared between the 's' and 'p' orbital in the form ns² np⁵ (the same as the question).  Attached is a table that highlights the fact that halogens have the same form in terms of the valence electrons. 

7 0
3 years ago
1. a car is traveling 60 miles per hours on cruise control. what is the net force?
Aleks [24]

Solution: (a) The net force is zero because car is travelling with same speed that is 60 miles per hour or there is no acceleration.

(b) Mass of object is 10 kg

Acceleration is 2 m/s², thus force can be calculated as follows:

F=m×a

Here, m is mass of object and a is its acceleration thus,

F=10 kg×2 m/s²

=20 kg m/s²

Here, 1 N=1 kg m/s²

Thus, F=20 N

(c) Force on object is 17 N and its acceleration is 1.5 m/s².

Mass of the object can be calculated as follows:

m=\frac{F}{a}

thus,

m=\frac{17 N}{1.5 m/s^{2}}=11.33 (\frac{N}{m/s^{2}})

Here, 1 N=1 kg m/s²

Thus,

m=11.33 kg


8 0
3 years ago
Hydrazine (N2H4) is a fuel used by some spacecraft. It is normally oxidized by N2O4 according to the following equation:
Serggg [28]

Answer:

-476.95 Kj

Explanation:

N2H4(l) + N2O4(g) = 2N2O(g) + 2H20(g)

∆Hrxn = n∆Hf(products) - m∆Hf(reactants)

Where n and m = stoichiometric coefficients of the products and reactants respectively from the balanced chemical equation, ∆Hf = standard enthalpy of formation, ∆Hrxn= standard enthalpy of reaction.

Using the following standard enthalpies of formation ( you did not provide any ):

N2H4(l) = +50.63Kj/mol; N2O4(g) = +9.08Kj/mol; N2O(g) =+33.18Kj/mol; H2O(g) = -241.8Kj/mol

∆Hrxn = [ (2(∆Hf(N2O)) + (2(∆Hf(H2O))] – [(1(∆Hf(N2H4)) + (1(∆Hf(N2O4))]

∆Hrxn = [ 2(+33.18) + 2(-241.8)] – [ (+50.63) + (+9.08)]

∆Hrxn = [ (+66.36)+(-483.6)] – [ +50.63+9.08]

∆Hrxn = [ +66.36-483.6] – [+59.71]

∆Hrxn = -417.24-59.71

∆Hrxn = -476.95 Kj

NOTE: Remember to use the standard enthalpies of formation given to you by your instructor if they differ from the values used herein, and follow the same procedure.

6 0
3 years ago
Suppose that a solution is tested for NO2 ion by adding 3M H2SO4 and heating, repeating this process until no further reaction o
Arada [10]

Answer:

The correct equation will be "[Fe(H2O)5]²⁺ + NO → Fe(H2O)5NO]²+ (brown ring) ".

Explanation:

For NO₂, the addition of H₂SO₄ forms HNO₂ comprising NO gas as well as HNO₂, the equation will be:

⇒  NO₂⁻ + 2H⁺ →  HNO2

⇒  HNO₂ + H₂O + H⁺  →  HNO₃ + NO

For NO₃⁻,

NO₃⁻, Fe₂+ oxidized to Fe₃ + then releases NO gas in the existence of H₂SO₄

⇒  3Fe₂⁺ + 4H⁺ + NO₃⁻  →  3Fe₃⁺ + NO + 2H₂O

Brown ring forming establishes NO3- presence in the initial test sample,

⇒  [Fe(H2O)5]²⁺ + NO  →  Fe(H2O)5NO]²+ (brown ring)

8 0
2 years ago
43 Which temperature change indicates an increase in the average kinetic energy of the molecules in a sample?(1) 15°C to 298 K (
aleksandrvk [35]
The increase in the average kinetic energy of the molecules needs the increase of temperature. The relation of ℃ and K is n ℃ = m K -273. So if we change all the K unit to ℃ unit, we can get the answer is (1).
3 0
3 years ago
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