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
grigory [225]
3 years ago
15

Which of the following is an example of a hypothesis?

Chemistry
2 answers:
Marrrta [24]3 years ago
7 0

Answer: A). a prediction that a tire's air pressure will increase if the tire's temperature is raised

Explanation:

A hypothesis is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories.

A hypothesis can be define as the presumed or predicted statement for a natural phenomena which is required to be testified by using suitable experimental methodology or observatory approaches.

A). a prediction that a tire's air pressure will increase if the tire's temperature is raised. is the correct answer this is because of the fact that the statement involves a prediction that can be proved by using suitable experimental methodology.

nevsk [136]3 years ago
5 0
The answer would be A.
You might be interested in
Which of the following is a salt? <br> C6H12O6<br><br> O2<br><br> C2H2<br> K C l
irina [24]

Answer:

it's kcl

Explanation:

the kcl should be salt

5 0
2 years ago
Assume prices increase from $15 to $18, yet quantity remains at 25. What is the total revenue?
UNO [17]

Given:

Number of items = 25

Price per item = $18

<u>To determine:</u>

The total revenue

<u>Explanation:</u>

Total revenue = quantity * price per item

                       = 25 items * 18 dollar/ 1 item = $450

Ans: A) The total revenue is $450

4 0
3 years ago
A chemical reaction takes place in which energy is absorbed arrange the characteristics of the reaction in order from start to f
Nostrana [21]
<span>A chemical reaction in which energy is absorbed is known as an endothermic reaction. The characteristics of the reaction in order from start to finish is as follows:

1. Lower energy of reactants
2. Transition state
3. Higher energy of products

This implies that in an endothermic reaction, </span><span>the products are less stable than the reactants.</span>
5 0
3 years ago
A 1.00 L buffer solution is 0.112 M in acetic acid and 0.112 M in sodium acetate. Acetic acid has a pKa of 4.74. What is the pH
topjm [15]

Answer:

ΔpH = 1.25

Explanation:

Using Henderson-Hasselbalch formula:

pH = pka + log [CH₃COONa] / [CH₃COOH]

pH = 4.74 + log [0.112] / [0.112]

<em>pH = 4.74</em>

The reaction of sodium acetate (CH₃COONa) with HCl is:

CH₃COONa + HCl → CH₃COOH + NaCl

<em>Producing acetic acid, </em>CH₃COOH.

If 0.1mol of HCl reacts the final moles of CH₃COONa are:

0.112mol - 0,1 mol = 0.012mol

Moles of acetic acid are:

0.112mol + 0,1 mol = 0.212mol

Using Henderson-Hasselbalch formula:

pH = pka + log [CH₃COONa] / [CH₃COOH]

pH = 4.74 + log [0.012] / [0.212]

<em>pH = 3.49</em>

<em></em>

Change in pH, ΔpH = 4.74 - 3.49 =<em> 1.25</em>

I hope it helps!

6 0
3 years ago
Calculate the mass in grams of a sample of Americium containing six atoms
elena-14-01-66 [18.8K]
Americium has a molar mass of 243 g/mol.
There are 6.022*10^23 atoms in a mol (Avogadro's number).

6 atoms / 6.022 * 10^23 atoms/mol gives us:

9.963*10^-24 mols

Lastly: 9.963*10^-24 mols * 243 g/mol = 2.42*10^-21 g
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which phrase describes a hypothesis? a. reviewing information related to the problem b. testing a factor, or variable, in an exp
    5·1 answer
  • Which is the best term to use when describing the energy of position?
    15·2 answers
  • What is the meaning of semipermeability?​
    6·1 answer
  • What is the percentage of water in the hydrate CoCl 6?
    7·1 answer
  • Difference between element and radical​
    13·2 answers
  • If the amplitude of ocean waves increases by a factor of 1.1, by how much does the energy increase?
    10·1 answer
  • What is a cylinder? Give an example of an<br> object that's a cylinder.
    7·2 answers
  • Phosphorus-32 has a half life of 14.3 days. How many days will it take for a
    8·1 answer
  • Diisopropyl ether reacts with concentrated aqueous HI to form two initial organic products
    12·1 answer
  • How do the atomic number and the mass number of an element
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!