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Nastasia [14]
4 years ago
11

What evidence supports a conservation law?

Chemistry
1 answer:
True [87]4 years ago
3 0

Answer:

The answer is B.

Explanation:

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.

According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such the amount of gas consumed or produced during a reaction.

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What is the empirical formula of .50 moles of S and 1.5 moles of O
Ira Lisetskai [31]
Partial/total moles= 0.5/2 & 1.5/2 it results to a ratio S:O where S=1 and O=3 the final answer will be SO3.. I hope that helped
8 0
4 years ago
The dipole moment of hf is 1.91d. what is the dipole moment of hf in c⋅m? express your answer in coulomb-meters to three signifi
Drupady [299]
<span>6.37x10^-30 coulomb-meters The unit for dipole moments is the Debye which is 1x10^-21 C*m^2/s divided by the speed of light (299792458 m/s). So the conversion factor is 1x10^-21 C*m^2/s / 299792458 m/s = 3.33564095E-30 C*m And converting 1.91 d to Cm gives 1.91 * 3.33564095E-30 C*m = 6.37x10^-30 coulomb-meters</span>
3 0
3 years ago
If an atom has more protons than an electron, its net charge will be
Ierofanga [76]

Answer: If an object has more protons than electrons, then the net charge on the object is positive. If there are more electrons than protons, then the net charge on the object is negative. If there are equal numbers of protons and electrons, then the object is electrically neutral.

Explanation:

3 0
3 years ago
Read 2 more answers
The gas arsine, AsH3, decomposes as follows. 2 AsH3(g) 2 As(s) 3 H2(g) In an experiment at a certain temperature, pure AsH3(g) w
stich3 [128]

Answer:

96 torr

Explanation:

After 48 hours, we are told, the pressure is 488 torr. Since we started with 392 torr of arsine, we can conclude there is an increase in pressure cause by the arsine producing hydrogen and the solid As.

We can calculate the equilibrium pressure of H₂ if we account for the total pressure in terms of the stoichiometry of the equilibrium equation:

                          2 AsH₃(g )     ⇆    2 As(s)        +      3 H2(g)

Initial p (atm)          392                                                  0

Change                   -2x                                                  3x

Equilibrium           392 - 2x                                           3x

and the total pressure at equilibrium is the sum of the pressure of the gasses arsine and hydrogen:

488 = (392 - 2x)+ 3x

488 - 392 = x

x = 96

Therefore the equilibrium pressure of H₂ is 3 x 96 = 288 torr

3 0
3 years ago
If you wanted to heat a liquid that would splatter when it is heated, you would heat it in a
Lina20 [59]

Answer:

This question lacks options but it will be answered based on the fact that laboratory processes including heating are done using glasswares. The answer is:

Conical or Erlenmeyer/Boiling flask

Explanation:

Glasswares are simply laboratory equipments made of glass. They are used in performing the various laboratory processes like mixing, storing chemicals, heating and cooling etc. Glasswares includes flasks e.g volumetric flask, Erlenmeyer flask etc, beaker, test tube, graduated cylinder etc.

Heating a liquid that would splatter or splash in a laboratory requires using a glassware that can prevent spilling of the liquid outside it. A FLASK such as Erlenmeyer or boiling flask is best suited for this purpose because they generally have a conical shaped body with a narrow neck that prevents liquid chemicals from spilling when heated or shaken. Flasks can also be corked with a lid to prevent the liquid from coming out.

8 0
4 years ago
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