1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sveticcg [70]
2 years ago
6

Help please! :)

Chemistry
2 answers:
Dominik [7]2 years ago
7 0

Answer:

Ions combine in only one ratio, just took it.

Explanation:

Neporo4naja [7]2 years ago
5 0

Answer:

Ions combine into only one ratio

Explanation:

Just took test

You might be interested in
The molar absorptivity for aqueous solutions of phenol at 211 nm is 6.17x103L/mol/cm. Calculate the linear range of phenol conce
Scilla [17]

Explanation:

The given data is as follows.

          \lambda = 211 nm,          \sum = 6.17 \times 10^{3} mol/L/cm

           l = 1 cm,             7% < Transmittance < 85%

Suppose the aqueous solution follows Lambert-Beer's law. Therefore,

                   Absorbance = -log \frac{\text{Percentage transmittance}}{100}

Hence, for 7% transmittance the value of absorbance will be as follows.

                  Absorbance = -log \frac{7}{100}

                           A_{1} = 1.155

For 85% transmittance the value of absorbance will be as follows.

                 Absorbance = -log \frac{85}{100}

                           A_{2} = 0.07058

According to Lambert-Beer's law.

                  A = \sum \times l \times C

where,       A = absorbance

                 \sum = molar extinction coefficient

                 C = concentration

Therefore, concentration for 7% absorbance is as follows.

                    A_{1} = \sum \times l \times C_{1}

                  C_{1} = \frac{1.155}{6.17 \times 10^{3} \times 1}

                                  = 0.187 \times 10^{-3} mol/L

                                  = 0.187 mmol/L

Concentration for 85% absorbance is as follows.

                   A_{2} = \sum \times l \times C_{2}

                  C_{2} = \frac{0.07058}{6.17 \times 10^{3} \times 1}

                                  = 0.01144 \times 10^{-3} mol/L

                                  = 0.01144 mmol/L

Thus, we can conclude that linear range of phenol concentration is 0.01144 mmol/L to 0.187 mmol/L.

6 0
3 years ago
You just measured a metal cylinder and obtained the following information: mass - 3.543 g diameter -0.53 cm height = 4.40 cm. 26
Fittoniya [83]

Answer:

V cylinder = \pi r^2 h = \pi(0.53 cm/2)^24.4cm= 0.97 cm^3

note that r=diameter/2

density = m/V= 3.543/0.97= 3.65 g/cm^3

7 0
3 years ago
The stock concentration of NaOH is 0.5M. 0.5M = 0.500mol/1.0L.
valentinak56 [21]

Answer:a) 0.1 mole. b) 4g. c) 2% d)  196 mL

Explanation: in 200mL , 0.1mole

mw NaOH = 40g/mol —> 4g in 0.1 mole

4g in 200mL so 2g in 100mL

density NaOH = 1g/mL so if 4g in 200 mL,  4mL , 196 mL water

5 0
2 years ago
The atomic mass of hydrogen is one. True False
mafiozo [28]

Answer:

It's true :) Hope that helps

8 0
3 years ago
Read 2 more answers
2. Electron A falls from energy level X to energy level Y and releases blue light. Electron B falls from energy level Y to energ
Lynna [10]
Wouldnt you find that on the grid or the table
3 0
2 years ago
Read 2 more answers
Other questions:
  • The continents of Africa and South America used to "fit together" like puzzle pieces. About how far back in time would you have
    7·1 answer
  • A flask and a beaker each contain the same amount of water. How are they similar? How are they different?
    14·2 answers
  • What is the boiling point of kerosene
    8·1 answer
  • Which type of chemical reaction occurs in 2KClO3 Right arrow. 2KCl + 3O2
    5·1 answer
  • Hejedndmidkddjfjdjxjxjnr
    14·2 answers
  • The electrical conductivity of an aqueous solution depends on the concentration of which particle in the solution
    15·1 answer
  • The first periodic table was organized according to atomic mass, but the current periodic table is arranged according to atomic
    11·1 answer
  • How make carbon dioxide ​
    10·1 answer
  • Make a atomic model of carbon-12 in mine craft <br><br> (If it's good I'll give a lot of points)
    8·1 answer
  • I need help with my work
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!