Physics, 11.11.2019 08:31 caromaybelline71
How does the law of conservation of mass apply to this reaction: al + 3hcl → h2 + alcl3 ?
hydrogen and chlorine need to be balanced. there is an equal amount of aluminum on each side.
only the hydrogen needs to be balanced. there are equal numbers of aluminum and chlorine.
the law of conservation of mass has already been applied. there is an equal number of each element on both sides of the equation.
the equation needs to be balanced. there are fewer hydrogen atoms in the equation than aluminum or chlorine.
Answers: 2
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Physics, 21.06.2019 23:30
Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?
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An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.
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How does the law of conservation of mass apply to this reaction: al + 3hcl → h2 + alcl3 ?
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