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mr_godi [17]
3 years ago
7

if the products of a reaction are nacl and h2o what does the law of conservation of mass reveal about the reactants in the react

ion?
Chemistry
2 answers:
yawa3891 [41]3 years ago
5 0

B. The reactants will have one Na, one Cl, one O, and two H atoms.


Alika [10]3 years ago
3 0
The law of conservation of mass in chemical reactions states that the same number of atoms of each element present in the reactants are present in the products.

So, the law of conservation of mass reveals that the reactants for a reaction where the products are NaCl and H2O contain the same elements and the same number of each: Na, Cl, H and O.

For example, the reaction may have been: NaOH + HCl ---> NaCl + H2O.

In a chemical reaction, the atoms are not created nor destroyed; the same atoms of each alement are present in reactants and products.
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Zigmanuir [339]

Greenhouse gases released from the burning of fossil fuels are responsible for global warming.

<h3>What is the atmosphere?</h3>

The atmosphere is the region of region of the planet above its surface area where gases envelop the planet.

Based on the effect of greenhouse gases on global warming;

  • Planet A has a higher surface temperature due to the higher amount of carbon dioxide in the atmosphere since carbon dioxide is a greenhouse gas.
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8 0
2 years ago
A lithium flame has a characteristic red color due to emissions of wavelength 671 nm. What is the mass equivalence of 1 mol of p
e-lub [12.9K]

Answer:

1.98x10⁻¹² kg

Explanation:

The <em>energy of a photon</em> is given by:

  • E= hc/λ

h is Planck's constant, 6.626x10⁻³⁴ J·s

c is the speed of light, 3x10⁸ m/s

and λ is the wavelenght, 671 nm (or 6.71x10⁻⁷m)

  • E = 6.626x10⁻³⁴ J·s * 3x10⁸ m/s ÷ 6.71x10⁻⁷m = 2.96x10⁻¹⁹ J

Now we multiply that value by <em>Avogadro's number</em>, to <u>calculate the energy of 1 mol of such protons</u>:

  • 1 mol =  6.023x10²³ photons
  • 2.96x10⁻¹⁹ J *  6.023x10²³ = 1.78x10⁵ J

Finally we <u>calculate the mass equivalence</u> using the equation:

  • E=m*c²
  • m=E/c²
  • m =  1.78x10⁵ J / (3x10⁸ m/s)² = 1.98x10⁻¹² kg

6 0
3 years ago
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5 0
3 years ago
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An isotope undergoes radioactive decay. The new isotope that forms has an atomic number that is 2 less than the original isotope
geniusboy [140]

Answer:

3)alpha decay because alpha particles have two protons and two neutrons

Explanation:

When a radioactive isotope undergoes a decay, a daughter nucleus or nuclei is/are formed. The mass number and atomic number of the daughter nucleus gives us an idea of the nature of radioactive decay that the parent nucleus underwent.

If the daughter mass number of the daughter nucleus is four units less than that of the parent nucleus and the atomic  number of the daughter nucleus is two units less than that of the parent, then such a decay is an alpha decay.

An alpha particle has two protons and two neutrons thus it has a mass number of 4 and an atomic number of two.

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3 years ago
In a covelant bond two atoms are held together by the attraction between ____. The number of covalent bonds that an atom can for
Ad libitum [116K]

Answer:

them,2

Explanation:

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4 years ago
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