Chemistry, 31.03.2021 08:20 gabbypittman20

Which of the following is a balanced chemical equation? Select one:

NaOH + H2CO3 → Na2CO3 + H2O

N2 + H2 → 2NH3

NH3 + HCl → NH4Cl

AlCl3 + Li → Al + LiCl

Answers: 2

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Answers

NH3 + HCl → NH4Cl: this equation is balanced as it has one nitrogen atom, four hydrogen atoms and one chlorine atom at each side of the equation.

Explanation:

Hello there!

In this case, according to the law of conservation of mass, we need to have the same number of atoms of each element at both sides of the equation; therefore we analyze each reaction:

NaOH + H2CO3 → Na2CO3 + H2O : three hydrogens at the left and two at the right, so this is not balanced.

N2 + H2 → 2NH3: two hydrogens at the left and six at the right, so this is not balanced.

NH3 + HCl → NH4Cl: this equation is balanced as it has one nitrogen atom, four hydrogen atoms and one chlorine atom at each side of the equation.

AlCl3 + Li → Al + LiCl: three chlorines at the left and one of the right, so this is not balanced.

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Answer from: Quest

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

Answer from: Quest

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

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You know the right answer?

Which of the following is a balanced chemical equation? Select one:

NaOH + H2CO3 → Na2CO...

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