Convert 25 degrees Celsius to Farenheit.

Chemistry

2 answers:

oksian1 [2.3K]3 years ago

8 0

Answer:

Im 98% sure it's 77 F

Sindrei [870]3 years ago

6 0

Answer:

(25°C × 9/5) + 32 = 77°F

Explanation:

hope this helps

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I’ll mark u BRAINIEST if it CORRECT! This is one attempt so don’t guess!

Fiesta28 [93]

Answer:

If Methyl orange is used as only indicator, it's used in the scenario " strong acid to weak base"

Explanation:

A reaction between a weak acid and weak base, gives not strong enough changes in pH. The neutralization reaction (might) happen. But it would be difficult to get the titration curves. This means no indicator is suitable.

A strong acid to a weak base : The equivalence point for titrations between strong acids and weak bases occurs somewhere upward of pH=3-4, this depends on how strong the acid and the base.

⇒ A good indicator for this scenario is Methyl orange, because it changes colour between a pH of 3.1 - 4.4. We notice that the equivalence point is more or less in the middle of this range. This makes the indicator an useful one !

A weak acid to a strong base : The equivalence point for titrations between weak acids and strong bases occurs somewhere upward of pH=7, this depends on how strong the acid and the base.

⇒ A good indicator for this scenario is phenolphthalein, because it changes colour between a pH of roughly 8 - 10. We notice that the equivalence point is more or less in the middle of this range. This makes the indicator an useful one !

⇒Methyl orange has an equivalence point, more or less at pH=4, ( so will change colour there). This is quite away from where the equivalence point of a weak acid with a strong base.

HCl with sodium carbonate: Since this reaction has 2 end points (one at pH = 8.5 and one at pH =3.5). Methyl orange has range between pH = 3.1 and 4.4 ; phenolphthalein has a range between 8.3 and 10. Since it's colourless below pH 8, it does not interfer with the methyl orange.

For this scenario methyl orange is ONE of the indicators that can be used. As only indicator, it does not have a full spectrum of colour change. So the otherindicator that should be used is phenolphthalein.

If Methyl orange is used as only indicator, it's used in the scenario " strong acid to weak base"

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3 years ago

What does the 'u' mean in CuO?

Viktor [21]

That's a compound

The Cu stands for Copper, and the O stands for oxygen

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3 years ago

Combustion of a 0.9835-g sample of a compound containing only carbon, hydrogen, and oxygen produced 1.900 g of co2 and 1.070 g o

Colt1911 [192]

Find grams of C and H, using molar masses:
12.0 g C x (1.900 g CO2 / 44.0 g CO2) = 0.5182 grams C
2.02 g H x (1.070 g H2O /18 g H2O) = 0.1201 grams H

Since all the C and H in CO2 and H2O will come from the sample except oxygen, because we need to provide oxygen for sample to burn.

0.9835 g sample - 0.5182 g O - 0.1201 g H = 0.3452 grams O

find moles, using molar masses:
0.5182 grams C / 12.0 g/mol C = 0.0432 moles C
0.1201 grams H / 1.01 g/mol H = 0.119 moles H
0.3452 grams O / 16.0 g/mol O = 0.0216 moles O

0.0216 is lesser, so use it to normalize to find the ratio.
find ratios:
0.0432 moles C / 0.0216 = 2 moles C
0.119 moles H / 0.0216 = 5.5 moles H
0.0216 moles O / 0.0216 = 1 mole O

so, the ratio is C2 H{5.5} O1
double the ration to eliminate decimals.

gives your answer is $C_4 H_{11} O_2$

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Is grinding glass physical or a chemical change

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Read 2 more answers

5.1 ounces to grams.

Sergeeva-Olga [200]

Answer: here’s the answer

Explanation:5.1 ounces =