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raketka [301]
3 years ago
12

Air is an example of a mixture because the elements and compounds that make up air retain their individual properties. True Fals

e
Chemistry
2 answers:
Helga [31]3 years ago
8 0

i believe its true bc ik for sure air is a homogenous mixture

zysi [14]3 years ago
4 0

the answers the true

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In the reaction 2H2(g) + O2(g) ® 2H2O(g), the volume ratio of H2 to H2O is __________.
Nadusha1986 [10]
2:2 is the answer to your question
5 0
4 years ago
You have dissolved 10 g sodium oxide in 200 ml water.calculate. the concentration of the solution​
mash [69]

0.05M is the concentration of the solution​.

The amount of a chemical substance in a mixture is expressed by the substance's concentration. Concentration can be expressed in numerous ways. In chemistry, the terms "solvent" and "solute" are used to denote the substance of interest and the medium in which it is dissolved, respectively

Subtract the solute's mass from the total volume of the solution. Using m as the solute's mass and V as the total volume of the solution, write out the equation C = m/V. To get the concentration of your solution, divide the mass and volume figures you discovered and plug them in.

C = m / V

C = 10 / 200

C = 0.05M.

Learn more about concentration here:

brainly.com/question/10725862

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6 0
2 years ago
An analytical chemist is titrating of a solution of ammonia with a solution of . The of ammonia is . Calculate the pH of the bas
harina [27]

Answer: The question has some details missing. here is the complete question ; An analytical chemist is titrating 88.4 mL of a 0.2700 M solution of ammonia (NH3 with a 0.4300 M solution of HNO3. The pK, of ammonia is 4.74 Calculate the pH of the base solution after the chemist has added 66.3 mL of the HNO3 solution to it . Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of HNO3 solution

Explanation:

Given ;

  • number of moles of base = 88.4 x 0.2700 = 23.868
  • number of moles of acid = 0.4300 x 66.3 = 28.509
  • This was after the equivalence point, as such net moles of acid = 28.509 - 23.868 = 4.641mol
  • total volume of solution = 88.4 + 66.3 = 154.7mL
  • Concentration of Acid = moles/volume = 4.641/154.7 = 0.03M
  • From pH = -log[H^+] = -Log[0.03]
  • pH = 1.52

7 0
4 years ago
Why is there so much heat released following a combination reaction
Alona [7]

Answer: When a combination reaction occurs between a metal and a non-metal the product is an ionic solid.

Explanation: Another hint(s): When magnesium burns in air, the atoms of the metal combine with the gas oxygen to produce magnesium oxide. This specific combination reaction produces the bright flame generated by flares.

5 0
4 years ago
2 Na + Cl2 → 2 NaCl
Ksivusya [100]
Approximately 71.77 grams. I think so
8 0
3 years ago
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