Answer:
7.5×10²³ ions
Explanation:
Given data:
Mass of magnesium sulfate = 75.0 g
Number of ions = ?
Solution:
Number of moles of magnesium sulfate:
Number of moles = mass/molar mass
Number of moles = 75.0 g/ 120.36 g/mol
Number of moles = 0.623 mol
Magnesium sulfate formula: MgSO₄
Number of moles of ions in 1 mole of MgSO₄ = 2 mol (Mg²⁺ and SO₄²⁻)
Number of moles of ion in 0.623 moles of MgSO₄:
2 mole ×0.623 = 1.246 mol
Number of ions:
1 mole contain 6.022×10²³ ions
1.246 mol × 6.022×10²³ ions / 1mol
7.5×10²³ ions
Because the catalyst is not really part of the reaction. it is something that speed up a reaction by lowering the energy need for the reaction to take place. however, in the end the catalyst is brought back to its initial state. that's why it is long lasting
Answer: Dichotomous
Using a Dichotomous Key to Identify Organisms
A dichotomous key is a tool used by biologists to identify organisms in a group through a process of answering yes or no questions about the organism. Dichotomous means 'divided into two parts', as each question about an organism has two choices.
I dont know your question but that is true
The brick is solid because it's not hollow or containing spaces or gaps
