72.0gAl× 2 mol Al × 2 mol alcl3 × (grams alcl3)
------------ ---------------- ------------------
(grams Al) 2 mol Al 2 mol alcl3
same goes for HCL, remember to use mole to mole ratio
Explanation:
The solution of the lactic acd and sodium lactate is referred to as a buffer solution.
A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. In this case, the weak acid is the lactic acid and the conjugate base is the sodium lactate.
Buffer solutions are generally known to resist change in pH values.
When a strong base (in this case, NaOH) is added to the buffer, the lactic acid will give up its H+ in order to transform the base (OH-) into water (H2O) and the conjugate base, so we have:
HA + OH- → A- + H2O.
Since the added OH- is consumed by this reaction, the pH will change only slightly.
The NaOH reacts with the weak acid present in the buffer sollution.
Answer:
Sodium
Explanation:
Explanation: The element with electron configuration 1s22s22p63s1 belong I A group in the periodic table and it is sodium because it loses one electron. We have periodic table in attachments. Sodium is a chemical element with the symbol Na and atomic number 11
Answer:
It is psuedoscience because each metal is known to be a unique element.
Explanation:
<span>The question in English:
In 150 grams of aluminum, how many atoms of this element are present?
Data: MM (AI) = 27 g mol-1
Number of avogadro = 6.02 x 10²³
<span>Answer:
</span>
Moles (mol) = mass (g) / molar mass (g/mol)
Mass of Al is given as </span><span>150 g.
</span>Hence, moles of Al = 150 g / 27 g/mol = 5.56 mol
According to the Avogadro number, 1 mole of substance has 6.02 x 10²³ of particles.
Hence, 1 mole of Al = 6.02 x 10²³ of Al atoms
Then, atoms in 5.56 mol of Al = 6.02 x 10²³ mol⁻¹ x 5.56 mol
= 3.34712 x 10²⁴
Hence, 150 g of Al have 3.34712 x 10²⁴ of atoms.
