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Tju [1.3M]
3 years ago
14

What is the name for the gaseous sphere surrounding earth

Chemistry
1 answer:
Harlamova29_29 [7]3 years ago
5 0
The atmosphere is the name for and the gaseous sphere surrounding Earth.
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If I titrate an acid with 255mL of 3.4 M NaOH (base) and reach the equivalence point, how many moles of H+ ions were in the acid
FromTheMoon [43]

Answer:

Molar Concentration = \frac{Moles of Solute}{Litres of Solution}

                                     = \frac{3.4}{0.255}

                                    =  13.33

No. of H+ ions present = 13.33

pH value = - log[13.33]

               =  -1.12

Explanation:

The equivalence point, or stoichiometric point, of a substance response is the point at which synthetically identical amounts of reactants have been blended. As such, the moles of corrosive are equal to the moles of base, as per the condition (this doesn't really infer a 1:1 molar proportion of acid:base, simply that the proportion is equivalent to in the condition). It tends to be found by methods for a marker, for instance phenolphthalein or methyl orange. The endpoint (identified with, however not equivalent to the equivalence point) alludes to the point at which the marker changes shading in a colorimetric titration.

7 0
3 years ago
Hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer indu
gayaneshka [121]

Answer:

42672 kJ

Explanation:

Chemical reaction:

C₂H₄ + H₂ → C₂H₆ + heat

Now we calculate the number of moles of ethane C₂H₆:

number of moles = mass / molecular weight

number of moles of ethane = 10.1 / 30 = 0.336 kmoles = 336 moles

And determine the heat released:

if      127 kJ are released when 1 mole of C₂H₆ is produced

then X kJ are released when 336 moles of C₂H₆ is produced

X = (127 × 336) / 1 = 42672 kJ

3 0
4 years ago
What is the noble-gas electron configuration for bromine?
marshall27 [118]
My Answer: (Ar) 3d10 4s2 4p5

Hope I helped! :D
5 0
3 years ago
Forming a hypothesis is accomplished through _______ reasoning.
vfiekz [6]
Deductive reasoning involves making broad observations and examining possibilities to reach a specific, logical conclusion, which is required in the formation of a hypothesis. Conversely, inductive reasoning involves taking specific observations and making broad generalisations from these. Therefore the answer is A.

Hope this helps!
4 0
3 years ago
Read 2 more answers
Heat _____.
makvit [3.9K]
A:Is a measure of energy
7 0
3 years ago
Read 2 more answers
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