<span>The answer is iron. Iron has an atomic number of 26. This means than iron has 26 protons in it's nucleus. However, not all iron atoms have the same number of neutrons. Most commonly iron has 30 neutrons, but it also has 3 other stable isotopes. The word stable is important here because unstable elements are radioactive.</span>

7 0

3 years ago

How many moles are in 20 grams of Ca (Calcium)? *

liraira [26]

Answer: The correct is 0.5 moles.

Explanation:

3 0

3 years ago

A system at equilibrium has two aqueous products and two aqueous reactants. An additional amount of one of the products is added

devlian [24]

Answer: c. the amounts of the reactants

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle. This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

For the given reaction:

$A(aq)+B(aq)\rightleftharpoons C(aq)+D(aq)$

If the concentration of one of the products is increased, so according to the Le-Chatelier's principle, the equilibrium will shift in the direction where decrease of concentration of product takes place. Therefore, the equilibrium will shift in the left direction i.e. towards the reactants and thus more reactants will be formed.

6 0

4 years ago