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Firdavs [7]
3 years ago
6

. Elements in the Periodic Table are arranged according to increasing numbers of _____________, which is called the ___________

______________ on an element key.
Chemistry
1 answer:
Alex17521 [72]3 years ago
4 0

Answer:. Elements in the Periodic Table are arranged according to increasing numbers of ______atoms_______, which is called the ______atomic _____ _______number_______ on an element key.

Explanation: I just learned about this at school!! ; )

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2. suppose you added 40 ml of water to your vinegar sample instead of 20 ml. would the titration have required more, less or the
Alexandra [31]

The titration would require the same amount of NaOH.

<h3>Number of moles and dilution</h3>

The number of moles of solute in a solution remains the same irrespective of the amount of water added to dilute the solution.

This is in accordance with the dilution law which says that the number of moles of a solution before dilution is the same as after dilution.

Thus, the amount of NaOH needed to neutralize the vinegar will remain the same for a complete reaction since the number of moles of solute in the vinegar has not changed.

More on number of moles can be found here: brainly.com/question/14919968

#SPJ1

8 0
3 years ago
What is the chemical equation for a reaction between copper (ll carbonate and heat?
tino4ka555 [31]
Copper (II) Carbonate + Heat yields copper (II) oxide and carbon dioxide
Molecular Equation: CuCo3 + heat > CuO + CO2
6 0
3 years ago
The boiling point of water is also the same as its' ___________ point
Helga [31]
212°F (100°C) I think
7 0
4 years ago
Read 2 more answers
When a sample of gas is cooled, it condenses into a liquid. In which of the following ways do the molecules of the original gas
Amanda [17]
<span>c. The molecules are closer together as a gas than they do as a liquid.</span>
3 0
4 years ago
Given the equilibrium constants for the following two reactions in aqueous solution at 25 ∘C HNO2(aq)H2SO3(aq)⇌⇌H+(aq) + NO2−(aq
krok68 [10]

Answer : The value of K_c for the final reaction is, 184.09

Explanation :

The equilibrium reactions in aqueous solution are :

(1) HNO_2(aq)\rightleftharpoons H^+(aq)+NO_2^-(aq)         K_{c_1}=4.5\times 10^{-4}

(2) H_2SO_3(aq)\rightleftharpoons 2H^+(aq)+SO_3^{2-}(aq)         K_{c_2}=1.1\times 10^{-9}

The final equilibrium reaction is :

2HNO_2(aq)+SO_3^{2-}(aq)\rightleftharpoons H_2SO_3(aq)+2NO_2^-(aq)         K_{c}=?

Now we have to calculate the value of K_c for the final reaction.

Now equation 1 is multiply by 2 and reverse the equation 2, we get the value of final equilibrium reaction and the expression of final equilibrium constant is:

K_c=\frac{(K_{c_1})^2}{K_{c_2}}

Now put all the given values in this expression, we get :

K_c=\frac{(4.5\times 10^{-4})^2}{1.1\times 10^{-9}}=184.09

Therefore, the value of K_c for the final reaction is, 184.09

4 0
3 years ago
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