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N76 [4]
3 years ago
6

Please help me with this chem question. Only answer if you know it.

Chemistry
2 answers:
Mashcka [7]3 years ago
7 0

Answer:

solid=(s)

Explanation:

A solubility table may be something your class may want you to memorize. Where an aqueous (aq) solution is formed by a soluble compound dissolving in water, our solvent. So if we refer to this solubility table, it says phosphate (PO4) is usually insoluble, so in the reaction it won't break down in water and will stay as a solid (s). The only exceptions are group 1 alkali metals or ammonium (NH4+).

mariarad [96]3 years ago
4 0
Your answer is b because it is
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(a) 4.64 x 1024 atoms Bi into grams
nexus9112 [7]

Answer:

1610.7 g is the weigh for 4.64×10²⁴ atoms of Bi

Explanation:

Let's do the required conversions:

1 mol of atoms has 6.02×10²³ atoms

Bi → 1 mol of bismuth weighs 208.98 grams

Let's do the rules of three:

6.02×10²³ atoms are the amount of 1 mol of Bi

4.64×10²⁴ atoms are contained in (4.64×10²⁴ . 1) /6.02×10²³ = 7.71 moles

1 mol of Bi weighs 208.98 g

7.71 moles of Bi must weigh (7.71 . 208.98 ) /1 = 1610.7 g

5 0
3 years ago
rank the group 1a elements tested in order of increasing energy emission when electrons returns to the ground state. explain thi
labwork [276]

<em>Answer:</em>

  • The increasing order of energy emission is as follow
  •                               Li < Na < K < Rb < Cs

<em>Explanation:</em>

  • The Characteristic colors of alkali metals are
  •                   Li-crimson<em> red</em>
  •                   Na- golden<em> yellow</em>
  •                    K- pale <em>violet</em>
  •                    Rb and Cs- <em>violet</em>
  1. These flame color show that when we moved from down the group, the wavelength decreases (frequency increases).
  2. As the color of Li is red that shows ,it has less emission energy as compare to Rb and Cs that have color violet (more emission energy).
3 0
3 years ago
_________ is caused by deficiency of Vitamin A​
ivann1987 [24]

Answer:

eye weakness is caused by deficiency of vitamin A

4 0
3 years ago
Read 2 more answers
It is important to understand the differences between chemical and physical changes. Chemical changes result in new substances,
Marysya12 [62]

Answer:

Melting of ice

Explanation:

A physical change is one in which just the physical properties of the matter is altered. Most phase changes reaction falls under this type of change.

  • Examples are boiling, melting, freezing, condensation, sublimation, magnetization of metals, breaking glass, cutting wood.
  1. No new kinds of matter is formed.
  2. The process is reversible
  3. No change in mass
7 0
3 years ago
Which statement best describes the formula equation cl1(g) + 2kbr(aq) —&gt; 2kcl(aq)+br2(i)
Zigmanuir [339]

Answer:

The chlorine gas and potassium bromide solution react to form liquid  bromine and potassium chloride solution.

Explanation:

Chemical equation:

Cl₂(g) + KBr (aq) → KCl (aq) + Br₂(l)

Balanced chemical equation:

Cl₂(g) + 2KBr (aq) → 2KCl (aq) + Br₂(l)

This equation showed that the chlorine gas and potassium bromide solution react to form liquid  bromine and potassium chloride solution.

Chlorine is more reactive than bromine it displace the bromine from potassium and form potassium chloride solution.

The given equation is balanced and completely hold the law of conservation of mass.

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

8 0
3 years ago
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