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3 years ago

Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)

Chemistry

2 answers:

Naya [18.7K]3 years ago

8 0

Mg(c) + 237shi (4z) ¥at h2)

valentinak56 [21]3 years ago

7 0

Answer:

Explanation:

So you should obtain 0.1875 moles of H2 The theoretical yield of H2, in grams, can be found by multiplying the 0.1875 moles by the molar mass of H2 (2 grams/mole). We would expect, and love to find, 0.37g in our possession.

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Which half-reaction correctly represents reduction? *

nasty-shy [4]

Answer:

Explanation:

Reduction can be seen through addition (gaining) of electrons, addition of Hydrogen or removal of Oxygen

Mn7+ is reduced to Mn4+ by the addition of 3 electrons.

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3 years ago

Predict the products of the reaction below. that is, complete the right-hand side of the chemical equation. be sure your equatio

kkurt [141]

The equation is as follow,

<span> HBr </span>₍aq₎ + H₂O ₍l₎ →

Solution:
HBr being strong acid with Ka value of 1.0 × 10⁹. When HBr is added to water, water acts as a base and HBr acts as a acid. Water picks the proton (H⁺) from HBr and converts into Conjugate acid (H₃O⁺) ahile HBr is converted into Conjugate Base (Br⁻) after loosing proton. The equation for this reaction is as follow,

HBr ₍aq₎ + H₂O ₍l₎ → H₃O⁺ ₍aq₎ + Br⁻ ₍aq₎

8 0

4 years ago

How many grams of NaOH are needed to make 0.250 liter of a 0.500 M solution of NaOH? 0.125 g 5.00 g 2.00 g

makkiz [27]

Answer:

5.00g

Explanation:

Molarity is moles per liter

Therefore:

x moles/.250L = .5 moles/1L

Solve for x: .125 moles required

Question asks for grams of NaOH so multiply the moles by the molar mass of NaOH

.125(39.997) = 4.999625g

Rounds to 5.00g

7 0

3 years ago

Read 2 more answers

Surface temperatures on Venus, the hottest planet in our solar system, can reach 755K. Express this temperature in degrees Fahre

dmitriy555 [2]

Answer:

about 900 degree Fahrenheit

Explanation:

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2 years ago

Which skier will have a greater potential energy? Justify your answer.

pochemuha

Answer: Skier 1 will have more potential energy because he is higher than skier 2

Explanation: Gravitational potential energy is the energy possessed by a body by virtue of its position or height.

P.E= $m\times g\times h$

m= mass of the body

g= acceleration due to gravity

h= height of body

Thus if the masses of two bodies are same, the one with greater height possess greater potential energy.

6 0

4 years ago