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Anna35 [415]
2 years ago
11

Which is not a property of bases Group of answer choices react with metals to produce hydrogen gas react with acids to form a sa

lt and water bitter taste slippery feel
Chemistry
1 answer:
Zanzabum2 years ago
5 0

Answer:

react with metals to produce hydrogen gas

Explanation:

NaOH is a common base and is a strong base. Look what happens with it reacts with a metal:
OH- (aq) + Li(s) --> LiOH. It forms a salt not H2

(I removed spectator ions)

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The active ingredient in aspirin is acetylsalicylic acid. A 2.51-g sample of acetylsalicylic acid required 27.36 mL of 0.5106 M
polet [3.4K]

Hey there!

mass of sample = 2.51 g of Aspirin

Number of moles of base  ( NaOH ) :

M*V = 27.36*0.5106 = 13.9700 mmol of base

M*V = 13.68*0.516 = 7.05888 mmol of acid

pKa calculation:

pH = pKa + log(A-/HA)

3.48 = pKa + log(7.05888 / (13.9700 -7.05888))

Pka =3.49 -  log(7.05888 / (13.9700 -7.05888))

pKa = 3.48

Molar mass calculation:

molar mass = mass/mol

(2.51)/(13.9700 *10⁻³) =

molar mass 180 g/mol approx


Hope that helps!

4 0
3 years ago
How many electrons does phosphorus gain when making a chemical bond
kipiarov [429]
A phosphorus atom gains three electrons to form a phosphide anion when forming a chemical bond to a metal I believe
8 0
3 years ago
Read 2 more answers
EXPLAIN why a skateboard coasting on a flat surface slows down and comes to a stop
ankoles [38]
A skateboard coasting on a flat surface slows down and then comes to a stop because the skateboard runs out of energy, and slows down, also, sense it is on a flat surface and not going downhill, it goes slower.
6 0
3 years ago
g The decomposition reaction of A to B is a first-order reaction with a half-life of 2.42×103 seconds: A → 2B If the initial con
Tanzania [10]

Answer:

In 23.49 minutes the concentration of A to be 66.8% of the initial concentration.

Explanation:

The equation used to calculate the constant for first order kinetics:

t_{1/2}=\frac{0.693}{k}} .....(1)

Rate law expression for first order kinetics is given by the equation:

t=\frac{2.303}{k}\log\frac{[A_o]}{[A]} ......(2)

where,  

k = rate constant

t_{1/2} =Half life of the reaction = 2.42\times 10^3 s

t = time taken for decay process = ?

[A_o] = initial amount of the reactant = 0.163 M

[A] = amount left after time t =  66.8% of [A_o]

[A]=\frac{66.8}{100}\times 0.163 M=0.108884 M

k=\frac{0.693}{2.42\times 10^3 s}

t=\frac{2.303}{\frac{0.693}{2.42\times 10^3 s}}\log\frac{0.163 M}{0.108884 M}

t = 1,409.19 s

1 minute = 60 sec

t=\frac{1,409.19 }{60} min=23.49 min

In 23.49 minutes the concentration of A to be 66.8% of the initial concentration.

6 0
3 years ago
Write the general electron configuration of a transition element(a) in Period 5;
atroni [7]

Electron configurations of  transition elements in Period 5:

Y     Yttrium  [Kr] 4d1 5s2

Zr Zirconium        [Kr] 4d2 5s2

Nb Niobium  [Kr] 4d4 5s1 (*)

Mo Molybdenum [Kr] 4d5 5s1 (*)

Tc Technetium [Kr] 4d5 5s2

Ru Ruthenium [Kr] 4d7 5s1 (*)

Rh Rhodium  [Kr] 4d8 5s1 (*)

Pd Palladium [Kr] 4d10 (*)

Ag Silver  [Kr] 4d10 5s1 (*)

Cd Cadmium  [Kr] 4d10 5s2

What are transition elements?

  • The transition elements or transition metals occupy the short columns in the center of the periodic table, between Group 2A and Group 3A.  
  • They are sometimes called the d-block elements, since in this region the d-orbitals are being filled in, and are also referred to as B-group elements since in most numbering systems of the columns on the periodic table the numerals of these groups are followed by the letter B.

What are period 5 transition elements?

The period 5 transition metals are yttrium (Y), zirconium (Zr), niobium (Nb), molybdenum (Mo), technetium (Tc), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), and cadmium (Cd).

To know more about transition elements, refer:

brainly.com/question/2426896

#SPJ4

7 0
2 years ago
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