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erastova [34]
3 years ago
5

What does the most accurate clock tell us

Chemistry
2 answers:
Murrr4er [49]3 years ago
6 0
It tell us the most accurate time u can get out of a clock
Tom [10]3 years ago
5 0
1 second is the time that elapses during 9,192,631,770 cycles of the radiation produced by the transition between two levels of the caesium 133 atom
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when applied to a dish, soap makes grease soluble in water. which explanation correctly supports the role of intermolecular forc
ankoles [38]
This is possible because of the emulsifying properties present in soap. This property is caused by the hydrophilic end and hydrophobic end of a soap molecule. Grease is able to be dissolved in the water because it is attracted to the hydrophobic end of the soap molecule.
7 0
3 years ago
Which of the following bases are strong enough to deprotonate CH3CH2CH2C≡CH (pKa = 25), so that equilibrium favors the products?
seraphim [82]

Answer:

a, and f.

Explanation:

To be deprotonated, the conjugate acid of the base must be weaker than the acid that will react, because the reactions favor the formation of the weakest acid. The pKa value measures the strength of the acid. As higher is the pKa value, as weak is the acid. So, let's identify the conjugate acid and their pKas:

a. NaNH2 will dissociate, and NH2 will gain the proton and forms NH3 as conjugate acid. pKa = 38.0, so it happens.

b. NaOH will dissociate, and OH will gain the proton and forms H2O as conjugate acid. pKa = 14.0, so it doesn't happen.

c. NaC≡N will dissociate, and CN will gain a proton and forms HCN as conjugate acid. pKa = 9.40, so it doesn't happen.

d. NaCH2(CO)N(CH3)2 will dissociate and forms CH3(CO)N(CH3)2 as conjugate acid. pKa = -0.19, so it doesn't happen.

e. H2O must gain one proton and forms H3O+. pKa = -1.7, so it doesn't happen.

f. CH3CH2Li will dissociate, and the acid will be CH3CH3. pKa = 50, so it happens.

6 0
3 years ago
PH + pOH = 14. What is the hydroxide concentration of a solution with pH of 8?
sladkih [1.3K]
PH + pOH = 14
pOH=14-8=4
(OH-)=10^-4
4 0
3 years ago
glacial striations in the bedrock of south africa indicate that glaciers once moved across the african continent the presence of
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Okay, so the answer is
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2 years ago
How do sound waves travel? PLEASE HELP IF YOU WANT BRAINLEIST AND ME TO LIKE URE COMMENT!!
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The answer is A. The vibration caused by the waves through the air eventually weaken, which is why sound diminishes easily over distance.

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