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
777dan777 [17]
2 years ago
15

How did you organize the tiles in part A? Describe the method that you used.

Chemistry
1 answer:
pishuonlain [190]2 years ago
5 0
What is the question??
You might be interested in
The element Oxygen, O, is an example of which of the following?
Anon25 [30]
It is an example of a molecule 
5 0
3 years ago
Read 2 more answers
One mole of aluminum atoms has a mass of 27 grams. How many grams are in 9.0 moles of aluminum?
gizmo_the_mogwai [7]
27*9=243 if one mole is equal to 27 grams times that by 9
6 0
3 years ago
Between 2014 and 2016, more than 25,000 children in Flint, Michigan, drank water that was contaminated with lead from lead pipes
-Dominant- [34]

Answer:

Regularly test the water in residents' homes.

Explanation:

The only way to know if tap water contains lead is to do tests to determine the levels of that metal in the water. Therefore, the state is under an obligation to constantly conduct such tests in the resident´s homes and thus determine whether the water supplied is fit for human consumption.  

The state after the tests must guarantee the population the treatment of the water to reduce the levels of lead. The main pipes that contain lead pipes must be changed, as well as those parts of the service connections made of lead.

5 0
3 years ago
The Russian chemist who designed the periodic table that was similar to the Periodic Table used today was _______________-
Xelga [282]
Dmitri Mendeleev, he realized that the physical and chemical properties of elements were related to their atomic mass and arranged them into groups (columns)
8 0
3 years ago
What is the pOH of a 0.150 M solution of potassium nitrite? (Ka HNO2 = 4.5 x 10−4 )
yanalaym [24]

Answer:

11.9 is the pOH of a 0.150 M solution of potassium nitrite.

Explanation:

Solution :  Given,

Concentration (c) = 0.150 M

Acid dissociation constant = k_a=4.5\times 10^{-4}

The equilibrium reaction for dissociation of HNO_2 (weak acid) is,

                           HNO_2+H_2O\rightleftharpoons NO_2^-+H_3O^+

initially conc.         c                       0         0

At eqm.              c(1-\alpha)                c\alpha        c\alpha

First we have to calculate the concentration of value of dissociation constant (\alpha ).

Formula used :

k_a=\frac{(c\alpha)(c\alpha)}{c(1-\alpha)}

Now put all the given values in this formula ,we get the value of dissociation constant (\alpha ).

4.5\times 10^{-4}=\frac{(0.150\alpha)(0.150\alpha)}{0.150(1-\alpha)}

4.5\times 10^{-4} - 4.5\times 10^{-4}\alpha =0.150\alpha ^2

0.150\alpha ^2+4.5\times 10^{-4}\alpha-4.5\times 10^{-4}=0

By solving the terms, we get

\alpha=0.0533

No we have to calculate the concentration of hydronium ion or hydrogen ion.

[H^+]=c\alpha=0.150\times 0.0533=0.007995 M

Now we have to calculate the pH.

pH=-\log [H^+]

pH=-\log (0.007995 M)

pH=2.097\approx 2.1

pH + pOH = 14

pOH =14 -2.1 = 11.9

Therefore, the pOH of the solution is 11.9

4 0
3 years ago
Other questions:
  • What volume (cm​ 3​ ) would 9.0 grams of aluminum occupy? Density is 2.7 g/cm​ 3​ . Show your work
    11·1 answer
  • The specific heat of aluminum is 0.900 J/gº C. A 400.0 g sample of aluminum at 20.0º C absorbs 2520. J of heat energy. What is t
    10·1 answer
  • Experiments are often performed in science to produce data or evidence. This evidence is then analyzed to draw conclusions. The
    10·2 answers
  • Which of the following is NOT a characteristic of a compound?
    6·1 answer
  • hich of the following statements is not true for an exothermic reaction? Question 2 options: The products have a higher heat con
    12·1 answer
  • Choose the correct statement regarding the relative size of atoms:
    14·1 answer
  • 1.Which has a larger radius Ca atom or Ca+2 ion?
    6·1 answer
  • What is the density of water if you have 50.0 grams of water and a volume of 50.0 millimeters
    14·1 answer
  • Explain how the attractive forces between the particles in a liquid are related to the equilibirum vapour pressure of that liqui
    7·1 answer
  • VERY EASY QUESTION<br> Does a theory help prove an experience or an experience help prove a theory?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!