Answer:
<h2>1.74 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula
From the question we have
We have the final answer as
<h3>1.74 g/mL</h3>
Hope this helps you
PH= pKa + log( conjugate base/ conjugate acid)
Answer: Yellow is electron, green is neutron, Red is proton
Explanation:
I learned this
Answer:
29% is the final concentration
Explanation:
To solve this question we must find the volume of ethanol added and the volume of the whole solution. The concentration will be:
Volume ethanol / Total volume * 100
<em>Volume ethanol:</em>
10mL * 70% = 7mL ethanol
+
20mL * 80% = 16mL ethanol
= 23mL ethanol
<em>Total volume:</em>
10mL + 20mL + 50mL = 80mL
<em>Concentration:</em>
23mL / 80mL * 100
= 29% is the final concentration
Answer:
Answers are given below.
Explanation:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1) 0.680 moles of H₂S
0.680 mol × 6.022 × 10²³ molecules / 1mol
4.09× 10²³ molecules
2) 8.96 moles of KI
8.96 mol × 6.022 × 10²³ molecules / 1mol
53.96 × 10²³ molecules
3) 6.500 moles of KClO
6.500 mol × 6.022 × 10²³ molecules / 1mol
39.143 × 10²³ molecules
4) 0.950 moles of NaOH
0.950 mol × 6.022 × 10²³ molecules / 1mol
5.721 × 10²³ molecules
5) 4.73 moles of Na₂CO₃
4.73 mol × 6.022 × 10²³ molecules / 1mol
28.48 × 10²³ molecules
