Take 36 / (24 + 6 + 32) = 0.580 mol
0.580/.175 = 3.31 m
depression = 1.86 * 3.31 = 6.16
Subtract from 0 gives -6.16 C closest is A
0.00860 km in to scientific notation is 8.60 x10^-3 Km
<em><u>Explanation</u></em>
step for writing scientific notation
- move the decimal place to the right to create a new number from 1 to 10 <em>for example 0.0086 is moved three time to create 8.60</em>
- Determine the exponent that is the number of time you have moved the decimal. <em> </em><em>the exponent for 0.00860 is -3 since the decimal has been moved toward the right</em>
- Put the number into correct form for scientific notation that is <em>8.60 x10^-3</em>
Answer:
Write the balanced reaction equation. From this, note the mole ratio of Na to H₂; this enables you to know the number of moles of H₂ produced.
This technique is in your lecture notes and/or your chemistry textbook, so you should not have to ask Quorans to do your homework. (Take the hint.)
Explanation:
Complete question:
The student performs a second titration using the 0.10MNaOH(aq) solution again as the titrant, but this time with a 20.mL sample of 0.20MHCl(aq) instead of 0.10MHCl(aq).
1. The box below to the left represents ions in a certain volume of 0.10MHCl(aq). In the box below to the right, draw a representation of ions in the same volume of 0.20MHCl(aq). (Do not include any water molecules in your drawing.)
Answer:
The concentration of H+ and Cl- will be doubled.
Explanation:
See the attached photo for the representation of ions in the same volume.