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devlian [24]
3 years ago
7

What is an atom in chemistry

Chemistry
2 answers:
Alisiya [41]3 years ago
8 0
An atom is the smallest component of an element that has the chemical properties of that element.

hope this helps :)


barxatty [35]3 years ago
5 0
<span>the basic unit of a chemical element</span>
You might be interested in
what mass of aluminium hydroxide is needed to decompose in order to produce 65.0 L of water at STP in stoichiometry?
pishuonlain [190]
Aluminium Hydroxide on decomposition produces Al₂O₃ and Water vapors. 

<span>                               2 Al(OH)</span>₃    →    Al₂O₃  +  3 H₂O


According to equation at STP,

       67.2 L (3 moles) of H₂O is produced by  =  78 g of Al(OH)₃
So,
                65.0 L of H₂O will be produced by  =  X g of Al(OH)₃

Solving for X,
                                 X  =  (65.0 L × 78 g) ÷ 67.2 L

                                 X  =  75.44 g of Al(OH)₂
Result:
           75.44 g of Al(OH)₂ is needed to decompose in order to produce 65.0 L of water at STP in stoichiometry
6 0
2 years ago
Read 2 more answers
What is the mass of an atom that has 10 protons, 13 neutrons, and 10 electrons? 10 20 23 33?
zlopas [31]
It would be 23, s choice C. 
3 0
2 years ago
Recall that the value of Kw for the autoionization of water varies with temperature. At the temperature of your body (37°C), Kw
kvasek [131]

Answer:

pH =6.70

Explanation:

When Kw = 1x10^-14

[H3O+] = [OH-] --> 1x10-7

Kw =3.98x^10-14

3.98x^10-14 = [H3O+] . [OH-]

√ (3.98x^10-14) =  [H3O+] = [OH-]

[H3O+] = 1.99×10^-7

- log [H3O+] = pH ---> -log 1.99x10^-7 = 6.70

5 0
3 years ago
A solution of 62.4 g of a covalent compound in enough water to make 1.000 L of solution has an osmotic pressure of 0.305 atm at
Alborosie

Answer:

4.99 × 10³ g/mol

Explanation:

Step 1: Given  and required data

  • Mass of the covalent compound (m): 62.4 g
  • Volume of the solution (V): 1.000 L
  • Osmotic pressure (π): 0.305 atm
  • Temperature (T): 25°C = 298 K

Step 2: Calculate the molarity (M) of the solution

The osmotic pressure is a colligative pressure. For a covalent compound, it can be calculated using the following expression.

π = M × R × T

M = π / R × T

M = 0.305 atm / (0.0821 atm.L/mol.K) × 298 K

M = 0.0125 M

Step 3: Calculate the moles of solute (n)

We will use the definition of molarity.

M = n / V

n = M × V

n = 0.0125 mol/L × 1.000 L = 0.0125 mol

Step 4: Calculate the molar mass of the compound

0.0125 moles of the compound weigh 62.4 g. The molar mass is:

62.4 g/0.0125 mol = 4.99 × 10³ g/mol

8 0
3 years ago
Delta S will be positive for the reaction ________. a. 2Hg (l) + O2(g) ----------&gt; 2HgO (s) b. 2NO2 (g) -------&gt; N2O4(g) c
nordsb [41]

Answer:

BaF2(s) ------> Ba2 (aq) + 2F- (aq)

Explanation:

Entropy refers to the degree of disorderliness in a system. Processes that lead to greater disorderliness in a system are said to increase the entropy of the system or lead to a positive value of ΔS.

If we consider the process, BaF2(s) ------> Ba2 (aq) + 2F- (aq), we will notice that ions were produced in solution thereby increasing the disorderliness of the system.

8 0
2 years ago
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