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
Brilliant_brown [7]
3 years ago
7

The purpose of a scientific investigation is

Chemistry
1 answer:
torisob [31]3 years ago
5 0
Is to find the problem to the investigation
You might be interested in
In this experiment we will be using a 0.05 M solution of HCl to determine the concentration of hydroxide (OH-) in a saturated so
gulaghasi [49]

<u>Answer:</u> The moles of hydroxide ions present in the sample is 0.0008 moles

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is HCl.

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is Ca(OH)_2

We are given:

n_1=1\\M_1=0.05M\\V_1=16mL\\n_2=2\\M_2=?M\\V_2=36.0mL

Putting values in above equation, we get:

1\times 0.05\times 16=2\times M_2\times 36\\\\M_2=\frac{1\times 0.05\times 16}{2\times 36}=0.011M

To calculate the moles of hydroxide ions, we use the equation used to calculate the molarity of solution:

\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in mL)}}

Molarity of solution = 0.011 M

Volume of solution = 36.0 mL

Putting values in above equation, we get:

0.011=\frac{\text{Moles of }Ca(OH)_2\times 1000}{36}\\\\\text{Moles of }Ca(OH)_2=\frac{0.011\times 36}{1000}=0.0004mol

1 mole of calcium hydroxide produces 1 mole of calcium ions and 2 moles of hydroxide ions.

Moles of hydroxide ions = (0.0004 × 2) = 0.0008 moles

Hence, the moles of hydroxide ions present in the sample is 0.0008 moles

8 0
3 years ago
Socratic an example of an atom that has no charge is one that has
aksik [14]

An example of an atom that has no charge is one that has a. 2 protons, 2 electrons, and 1 neutron.

To be neutral an atom must have the <em>same number</em> of protons (+) and electrons (-).

Only then will the <em>charges cancel</em> and give a neutral atom.


5 0
3 years ago
Lake Michigan holds 1.3 x 1015 gallons of water. If just Chicago removed water from the
Lerok [7]

1.3 x 10¹⁵ : 1.2 x 10⁹ = 1.083 x 10⁶

5 0
2 years ago
Which of the following compounds would contain an electrostatic attraction as bonds between ions?
4vir4ik [10]

Answer:

iron sulfate

Explanation:

Electrostatic attraction as bonds between ions is characteristic of the electrovalent bond or the ionic bond

In this type of bond, there is electron transfer from one atom to another. The atom that looses electrons become positively charged while the atom that gains electrons becomes negatively charged.

In iron sulfate, there is electrostatic attraction between Fe II ions and sulphate ions, making iron sulfate an ionic compound.

6 0
3 years ago
How many neutrons Are there in an atom of hydrogen -3
Ivanshal [37]

Answer: 0 neutrons

Explanation:

to find neutrons you subtract the atomic number from the Atomic mass. The atomic mass is 1. The atomic number is 1. So 1-1=0 making the neutrons in a hydrogen molecule 0.

6 0
3 years ago
Other questions:
  • By heating a liquid and measuring the temperature at which it boils, what is being measured?
    9·1 answer
  • Metallic element are _____ (conductors or non-conductors), because ________. Nonmetallic elements are generally ____ (conductors
    14·1 answer
  • What can you say about the relationship between temperature and volume?
    12·1 answer
  • Is the autoionization of water endothermic or exothermic?
    5·1 answer
  • Allison is trying to identify the type of bacteria found on common surfaces like doorknobs, table tops, etc. For this experiment
    10·2 answers
  • A nonvolatile solute is dissolved in benzene so that it has a mole fraction of 0.139. What is the vapor pressure of the solution
    11·1 answer
  • Can someone help in all 3 question ABC<br>​
    14·1 answer
  • I don't understand my science usatestprep
    7·2 answers
  • Help with this please I’m really bad at this I will mark brainlist
    8·1 answer
  • What sound is produced when lithium react with water?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!