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
adell [148]
3 years ago
7

Which phrase defines an aquifer? A. the total amount of precipitation that falls on an area in a year B. the network of streams

and rivers that flow into a large river C. a lake or a pond that is used to store water D. an underground geological formation that contains a large amount of water
Chemistry
2 answers:
Aleks04 [339]3 years ago
8 0
An aquifer is D. an underground geological formation that contains a large amount of water.
Andrew [12]3 years ago
8 0
D. an underground geological formation that contains a large amount of water
You might be interested in
Help with atoms WILL MARK BRAINLIEST
Eddi Din [679]

Answer:

C 1:1

Explanation:

Hydrogen loses an electron to becone +1 which is a cation and flourine gains that electron to have a full outer shell on the 2p subshell to become -1 and is an anion so the ratio is 1:1.

4 0
2 years ago
Which statement best describes the pH of pure water? It is neutral because the concentration of hydronium ions equals that of hy
stira [4]

The pH of pure water has been best described as neutral pH with equal hydronium and hydroxide ions. Thus, option A is correct.

pH has been described as the measurement of hydrogen ions in a solution. The pH has been measured on a scale of 1-14. pH 7 has been the neutral pH.

The higher hydronium ion concentration tends to move the pH from 7 towards 1. The higher hydroxide ion concentration tends to move the pH above 7.

The neutral pH has been neither acidic nor basic with the equal constituents of hydronium and hydroxide ion in the solution.

Thus, the pH of pure water has been 7. It has neutral pH with equal hydronium and hydroxide ions. Thus, option A is correct.

For more information about the pH of the solution, refer to the link:

brainly.com/question/4975103

4 0
2 years ago
Read 2 more answers
How many moles are equal to 89.23g of calcium oxide, CaO?
Katen [24]

1.59moles

Explanation:

Mass  of CaO = 89.23g

Unknown

Number of moles = ?

Solution:

The mole is a unit of measurement in chemistry used to delineate the number of particles an atom contains.

A mole of a substance contains the avogadro's number of particles.

Number of moles = \frac{mass}{molar mass}

Molar mass of CaO = 40 + 16 = 56g/mol

  Number of moles = \frac{89.23}{56} = 1.59moles

learn more:

Number of moles brainly.com/question/1841136

#learnwithBrainly

8 0
3 years ago
Which can be classified as a trace fossil
dexar [7]

Trace fossils provide us with indirect evidence of life in the past, such as the footprints, tracks, burrows, borings, and feces left behind by animals, rather than the preserved remains of the body of the actual animal itself. so i would say B.

6 0
3 years ago
Read 2 more answers
When a 2.00 g sample of KCl is dissolved in water in a calorimeter that has a total heat capacity of 1.28 kJ ⋅ K − 1 , the tempe
Alchen [17]

Answer : The molar heat of solution of KCl is, 17.19 kJ/mol

Explanation :

First we have to calculate the heat of solution.

q=c\times (\Delta T)

where,

q = heat produced = ?

c = specific heat capacity of water = 1.28kJ/K

\Delta T = change in temperature = 0.360 K

Now put all the given values in the above formula, we get:

q=1.28kJ/K\times 0.360K

q=0.4608kJ=460.8J

Now we have to calculate the molar heat solution of KCl.

\Delta H=\frac{q}{n}

where,

\Delta H = enthalpy change = ?

q = heat released = 460.8 J

m = mass of KCl = 2.00 g

Molar mass of KCl = 74.55 g/mol

\text{Moles of }KCl=\frac{\text{Mass of }KCl}{\text{Molar mass of }KCl}=\frac{2.00g}{74.55g/mole}=0.0268mole

Now put all the given values in the above formula, we get:

\Delta H=\frac{460.8J}{0.0268mole}

\Delta H=17194.029J/mol=17.19kJ/mol

Therefore, the molar heat of solution of KCl is, 17.19 kJ/mol

7 0
3 years ago
Other questions:
  • Describe the processes of succession that would occur after a new volcanic island emerges from the ocean.
    10·1 answer
  • When 13.6 grams of kcl are dissolved in enough water to create a 180-gram solution, what is the solution's concentration, expres
    13·2 answers
  • If a photon dropping from the n = 7 to the n = 1 level hit the surface of Au, what would be the wavelength of the ejected electr
    8·1 answer
  • Which types of subatomic particles are found inside the nucleus of an atom?
    6·2 answers
  • A student needs 7.6 liters of a 0.18 molar solution for an experiment. How many grams of solute does the student need if the mol
    5·1 answer
  • Both the esophagus and the small intestine are involved in the digestion of food. The esophagus squeezes food into the stomach b
    14·1 answer
  • How much does 3 moles of silica weigh
    7·1 answer
  • What is the volume in liters that is needed to create a 2.3 M solution with 3.7 moles of Fe(OH)2? Round your answer to 1 decimal
    5·1 answer
  • Question 12 2 points) Saving Average Speed Were Speed Total Districe value A family from Texas flies to Washington, D.C. in an a
    12·1 answer
  • How many moles is 8.35x 10^25
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!