3 years ago

Myra wants to measure the pH of a sample of drinking water as accurately as possible. What method should she use?

Chemistry

1 answer:

zhenek [66]3 years ago

7 0

Use a strip of paper covered in PH indicating dye.

You might be interested in

During which changes of state do atoms that cannot move past one another become free to move?

Ipatiy [6.2K]

Answer:

C Is the correct answer!

Took the Cumulative Exam Review :/

7 0

3 years ago

Read 2 more answers

What part of the stem transports water and nutrients to the rest of the plant?

Crazy boy [7]

Answer:

C) xylem

Explanation:

6 0

3 years ago

The standard free energy of activation of a reaction A is 81.9 kJ mol–1 (19.6 kcal mol–1) at 298 K. Reaction B is one million ti

klasskru [66]

Answer:

54.9 kJ/mol

Explanation:

The relation between the activation energy (Ea) and the rate constant (k) is given by the Arrhenius equation.

$k=A.e^{-Ea/RT}$

where,

A is a collision factor

R is the ideal gas constant

T is the absolute temperature

Reaction B is one million times faster than reaction A at the same temperature. So $k_{B}=10^{6} k_{A}$ .

Then,

$k_{B}=10^{6} k_{A}\\A.e^{-Ea_{B}/RT}=10^{6}A.e^{-Ea_{A}/RT}\\e^{-Ea_{B}/RT}=10^{6}e^{-Ea_{A}/RT}\\ln(e^{-Ea_{B}/RT})=ln(10^{6}e^{-Ea_{A}/RT})\\\frac{-Ea_{B}}{RT} =ln10^{6} -\frac{Ea_{A}}{RT} \\Ea_{B}=(ln10^{6} -\frac{Ea_{A}}{RT}).(-RT)=(ln10^{6}-\frac{89.1kJ/mol}{(8.314\times 10^{-3} kJ/mol.K).298K} ).(-8.314\times 10^{-3} \frac{kJ}{mol.K}.298K )=54.9kJ/mol$

8 0

3 years ago

Boiling water in a pan is a good example of convection because___. Question 2 options: Boiling water can cook hard boiled eggs.

DaniilM [7]

Answer B: The water is touching the bottom of the pan, but not the heat source.

3 0

4 years ago

Read 2 more answers

Write a qualitative example ?<br> urgent response plssss

ArbitrLikvidat [17]

Explanation:profeción: arquitecto ,m edi co ingeniero,abogado

6 0

4 years ago