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Yuliya22 [10]
2 years ago
9

The observation that 20g of hydrogen gas always combines with 160g of oxygen gas to form 180g of water, even when there is more

than 160g of oxygen present in the reaction container it illustrates the law of?
A. Definite proportions
B. Ideal Gasses
C. Multiple proportions
D. Excess reactants
Chemistry
1 answer:
mash [69]2 years ago
3 0

Answer:

The answer is most likely A. Definite proportions

Explanation:

The Law of Definite proportions states that a given chemical compound always contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.

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How to change 5 % W/V of NaCl to ppm , M ? molar mass = 58.5<br>please clear explain​
11Alexandr11 [23.1K]

Answer:

50000ppm and 0.855M.

Explanation:

ppm is an unit of chemistry defined as the ratio between mg of solute (NaCl) and Liters of solution. Molarity, M, is the ratio between moles of NaCl and liters

A 5% (w/v) NaCl contains 5g of NaCl in 100mL of solution.

To solve the ppm of this solution we need to find the mg of NaCl and the L of solution:

<em>mg NaCl:</em>

5g * (1000mg / 1g) = 5000mg

<em>L Solution:</em>

100mL * (1L / 1000mL) = 0.100L

ppm:

5000mg / 0.100L = 50000ppm

To find molarity we need to obtain the moles of NaCl in 5g using its molar mass:

5g * (1mol / 58.5g) = 0.0855moles NaCl

Molarity:

0.0855mol NaCl / 0.100L = 0.855M

7 0
3 years ago
Why is it better to measure the percent change in mass<br> ratherthan just using the change in mass?
never [62]

Answer: The result is presented in proportion which gives a clearer understanding and accurate result.

Explanation: Percentage change in mass is the proportion of the initial mass of a substance changed after sometime. The results is presented as a percentage making it more accurate and can help to give future reference to weight calculations.

Change is Mass is the mass of a substance left after sometime mostly given in grams. It is not as accurate as percentage change in mass. It is generally better to show results in percentage change in mass as it gives a better understanding of what mass of a substance was lost after a given period or after application of energy like Heat or increased temperature.

6 0
3 years ago
What is the correct IUPAC name for S2F8?
notka56 [123]

Answer:

Question: What Is The Correct IUPAC Name For S2F8? X ( ( (I) (IV) Di- Mono- Penta- Tetra- Tri- Hepta- Octa- Hexa- Fluorine Selenide Flourate Sulfide Sodium Sulfate Sulfur Fluoride Hydrate Acid.

8 0
3 years ago
What does the ideal gas law describe
soldier1979 [14.2K]

the law that the product of the pressure and the volume of one gram molecule of an ideal gas is equal to the product of the absolute temperature of the gas and the universal gas constant.

5 0
3 years ago
Read 2 more answers
How many moles of ions are produced by the dissociation of 1 mol of al2(co3)3?
zloy xaker [14]
Aluminium Carbonate on Dissociation produces Aluminium Ions and carbonate Ions as follow,

                            Al₂(CO₃)₃      →     2 Al⁺³  +  3 CO₃⁻²

Result:
          On dissociation Al₂(CO₃)₃ produces FIVE Ions in total. The Ions produced and there number are as follow;

                                              Al⁺²  =  2

                                            CO₃⁻²  =  3
5 0
3 years ago
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