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Anastasy [175]
3 years ago
11

While David was riding his bike around the circular cul-de-sac by his house he wondered if the constant circle motion was having

any affect on his tires. what would be the best way for David to investigate this?
Chemistry
1 answer:
Agata [3.3K]3 years ago
4 0
Measure the tire preasure
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For a 0.50 molal solution of sucrose in water, calculate the freezing point and the boiling point of the solution.
jok3333 [9.3K]

Answer:

-0.93 °C; 100.26 °C  

Step-by-step explanation:

(a) Freezing point depression

The formula for the freezing point depression ΔT_f is

ΔT_f = iKf·b

i is the van’t Hoff factor: the number of moles of particles you get from a solute.

For sucrose,

    Sucrose (s)   ⟶   sucrose (aq)

1 mole sucrose ⟶ 1 mol particles     i = 1

ΔT_f = 1 × 1.86 × 0.50

ΔT_f = 0.93 °C

 T_f = T_f° - ΔT_f  

 T_f = 0.00 – 0.93  

 T_f = -0.93 °C

(b) Boiling point elevation

The formula for the boiling point elevation ΔTb is

ΔTb = iKb·b

ΔTb = 1 × 0.512 × 0.50

ΔTb = 0.256 °C

 Tb = Tb° + ΔTb  

 Tb = 100.00 + 0.256  

 Tb = 100.26 °C

6 0
3 years ago
Which of the following states of matter occurs at the highest temperature?
Aleks [24]
The answer is C. Plasma.
7 0
3 years ago
Read 2 more answers
PORFA AYUDAA !!!
matrenka [14]

Explanation:

The problem here is to find the atomic number of each of the element given.

Sum the powers of the configuration.

a- 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

  Atomic number is  = 2 + 2 + 6 + 2 + 6 + 1  = 19

b-  1s² 2s² 2p⁶ 3s² 3p⁴

  Atomic number  = 2 + 2 + 6 + 2 + 4  = 16

c- 1s¹

   Atomic number  = 1

6 0
2 years ago
How is the reaction rate affected by a temperature decrease?​
emmasim [6.3K]

Answer: When you lower the temperature, the molecules are slower and collide less. That temperature drop lowers the rate of the reaction. ... That greater density of molecules increases the number of collisions. When you decrease the pressure, molecules don't hit each other.

Explanation: i hoped that helped!!!!!!!

8 0
3 years ago
Write Huckel's rule below and determine how many electrons are required to make an aromatic ring with n = 0, 1, and 2.
lisov135 [29]

<u>Answer:</u> The number of electrons for n = 0, 1 and 2 are 2, 6 and 10 respectively.

<u>Explanation:</u>

Huckel's rule is used to determine the aromaticity in a compound. The number of delocalized \pi- electrons are calculated by using the equation:

\text{Number of delocalized }\pi-\text{ electrons}=4n+2

where,

n = 0 or any whole number

  • Calculating the value of electrons for n = 0

Putting values in above equation, we get:

\text{Number of delocalized }\pi-\text{ electrons}=4(0)+2=2

  • Calculating the value of electrons for n = 1

Putting values in above equation, we get:

\text{Number of delocalized }\pi-\text{ electrons}=4(1)+2=6

  • Calculating the value of electrons for n = 2

Putting values in above equation, we get:

\text{Number of delocalized }\pi-\text{ electrons}=4(2)+2=10

Hence, the number of electrons for n = 0, 1 and 2 are 2, 6 and 10 respectively.

4 0
3 years ago
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