Physics, 19.05.2021 18:30 pepethefrog3

Students in a science class observed that when a strip of Magnesium (Mg) metal was placed in a test tube containing Hydrobromic acid (HBr), the Magnesium began to bubble as hydrogen gas and Magnesium Bromide are formed. Which of the following choices show both the correctly balanced equation and identify the type of reaction?

A.

Mg+2HBr →H2+MgBr2 (synthesis)

B.

2Mg+HBr →H2+2MgBr2 (decomposition)

C.

Mg+2HBr →H2+MgBr2 (single replacement)

D.

Mg+2HBr →2H2+MgBr2 (double replacement)

Pls answer correctly I really need a good grade on this

Answers: 1

Show answers

Another question on Physics

Physics, 21.06.2019 17:10

The “death throes” of stars are amongst the most complex phenomena in all of astronomy, and the “corpses” of stars amongst the most energetic and exotic objects in existence. beginning at the end of the core helium fusion stage in a star’s life, describe in detail the post-main sequence development of both (a) a 1.0 solar mass star, and (b) a 25.0 solar mass star. in what significant ways do they differ? what role does each of these types of stars play in the "star-gas-star" cycle and the evolution of chemical elements in our galaxy?

Answers: 1

Answer

Physics, 22.06.2019 21:30

Contrast the force of gravity between these pairs of objects: 1-kg mass and a 2-kg mass that are 1 m apart; a 1-kg mass and a 2-kg mass that are 2 m apart; and two 2=kg masses that are 1 m apart. i dont understand.

Answers: 3

Answer

Physics, 23.06.2019 00:30

Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?

Answers: 1

Answer

Physics, 23.06.2019 14:50

Which statements describe how a machine can make work easier? check all that apply. it can put out more force than the input force by decreasing the distance through which force is applied. it can increase the amount of work performed if the output force is in the same direction as the input force. it can apply a force to an object in a different direction than the force applied to the machine. it can increase the distance through which a force acts by exerting less force than was used on it. it can exert a greater force through a greater distance than the force used on the machine.

Answers: 2

Answer

You know the right answer?

Students in a science class observed that when a strip of Magnesium (Mg) metal was placed in a test...

Questions