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3 years ago

The basic principle in balancing a chemical equation is to ______. hints

Chemistry

2 answers:

Natalija [7]3 years ago

5 0

Answer: obey the "law of conservation of mass".
_____________________________________

andrezito [222]3 years ago

3 0

Answer is: obey the Law of conservation of mass.

For example, balanced chemical reaction:

Pb(NO₃)₂(aq) + Li₂SO₄(aq) → PbSO₄(s) + 2LiNO₃(aq).

According to principle of mass conservation, number of atoms must be equal on both side of balanced chemical reaction.

There are two lithium atoms, one lead atom, one sulfur atom, ten oxygen atoms and two nitrogen atoms on both side of reaction.

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3. Mercury is a liquid metal that has a density of 13.58 g/mL. Calculate the volume of mercury

Alona [7]

Answer:

0.03682 mL of mercury

Explanation:

We know the density of the mercury which is 13.58 g/mL

density = mass / volume

volume = mass / density

Now we can calculate the volume of 0.5 g of mercury:

volume = 0.5 / 13.58 = 0.03682 mL of mercury

5 0

3 years ago

C2H4(g) + H2(g) mc030-1.jpg C2H6(g) Which change would likely cause the greatest increase in the rate of the reaction?

Vinil7 [7]

The reaction is a hydrogenation reaction of an alkene, and its equation is:
C₂H₄(g) + H₂(g) → C₂H₆(g)
Therefore, this reaction can be sped up just as any other irreversible reaction may have its rate increased, by increasing temperature and pressure to increase the effective collisions of molecules.

5 0

3 years ago

Read 2 more answers

Propose structures that meet the following descriptions. Use bond-line notation to draw your structural formulas. a. ketone with

bija089 [108]

Answer:

See explanation

Explanation:

In putting up prospective structures for the compounds, we must consider the tetra valency of carbon. Again you must read the description carefully before drawing each structure.

In each of the proposed structures, the number of atoms present must reflect the condensed structural formula given in the question.

Proposed structures for each chemical specie in the question are shown in the images attached.

7 0

3 years ago

In a hydrogen atom, the electron and the proton are seperated by about 0.5 angstroms, 5.0×10−11 m. what is the acceleration of a

nadya68 [22]

The charge of proton and electron is equal in magnitude that is $1.6\times 10^{-19} C$ . The distance between electron and proton is $0.5 \AA$ or $5\times 10^{-11} m$ .

Force exerted on electron by proton is calculated as follows:

$F= \left | \frac{kq_{e}q_{p}}{r^{2}} \right |$

Here, k is Coulomb's constant, $q_{p}$ is charge on proton, $q_{e}$ charge on electron and r is distance between them.

Putting the values,

$F= \left | \frac{(8.99\times 10^{9}N m^{2}/C^{2})(1.6\times 10^{-19} C)(1.6\times 10^{-19} C)}{(5\times 10^{-11} m)^{2}} \right |=9.2\times 10^{-8} N$