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3 years ago

liquid 1 reacts with liquid 2 producing a solid and a gas.Using this scenario which supports the law of conservation of mass?

Chemistry

2 answers:

lions [1.4K]3 years ago

6 0

Answer: Option (d) is the correct answer.

Explanation:

According to law of conservation of mass, the mass of reactants equal to the mass of products.

Therefore, when liquid 1 and liquid 2 reacts then their respective mass will be equal to the mass of products.

In a chemical equation, reactants are written of the left hand side whereas products are written on the right hand side.

Hence, we can conclude that following equation supports law of conservation of mass.

$mass of liquid 1 + mass of liquid 2 \rightarrow mass of solid + mass of gas$

MatroZZZ [7]3 years ago

3 0

The Answer Is : D) Mass of Liquid 1 + mass of Liquid 2 = mass of solid + mass of gas.

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3) The total number of orbital’s in a shell with principle quantum no (n) is

melamori03 [73]

Answer:

nine

There are nine orbitals in the n = 3 shell. There is one orbital in the 3s subshell and three orbitals in the 3p subshell. The n = 3 shell, however, also includes 3d orbitals. The five different orientations of orbitals in the 3d subshell are shown in the figure below.

Explanation:

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4 years ago

SnO2 + 2 H2 ——> Sn + 2 H2O

SpyIntel [72]

Answer:

0.15g

Explanation:

Given parameters:

Number of molecules of water = 1.2 x 10²¹ molecules

Unknown:

Mass of SnO₂ = ?

Solution:

To solve this problem, we have to work from the known to the unknown specie;

SnO₂ + 2H₂ → Sn + 2H₂O

Ensure that the equation given is balanced;

Now,

the known species is water;

6.02 x 10²³ molecules of water = 1 mole

1.2 x 10²¹ molecules of water = $\frac{1.2 x 10^{21} }{6.02 x 10^{23} }$ = 0.2 x 10⁻²moles

Number of moles of water = 0.002moles

From the balanced chemical equation:

2 mole of water is produced from 1 mole of SnO₂

0.002 moles of water will be produced from $\frac{0.002}{2}$ = 0.001moles

To find the mass;

Mass = number of moles x molar mass

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Mass = 0.001 x 150.7 = 0.15g

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3 years ago

The following compounds all show a single line in their 1H NMR spectra. List them as they would appear in an NMR spectrum, e.g.

wel

Answer:

For the provided compounds, by decreasing chemical shift (ppm), the sequence from left to right is Benzene >> Cyclohexane >> Ethane (CH₂-CH₂) >> Methane (CH₄).

Explanation:

¹H-NMR spectrum, roughly, we can say that the more density of electron around the Hydrogen atom, the lower the shift is. So, in this case methane with the simplest structure, only one Carbon atom, does not cause much effect to reduce the density of electron around the hydrogen, so, it is the lowest.

Ethane and cyclohexane looks similar, but cyclohexane with the ring-structure, six carbon atoms, has more effect than ethane with only 02 carbon atoms. Benzene, with the aromatic ring, which has very strong negativity with electron, so it cause the density of electron on the surrounding hydrogen to be the lowest among the four provided compounds.

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3 years ago