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
Hatshy [7]
3 years ago
13

3. What does Letter X and Y represent?

Chemistry
1 answer:
Katarina [22]3 years ago
7 0
Y means families and are vertical (alkaline, alkaline earthmetals, halogens, transition metals, noble gases, etc)
x means periods andare horizontal (1,2,3,4,5)
You might be interested in
Based on solubility, boiling point, and spectroscopic results, a chemist identified an unknown compound as an alcohol. Yet when
mojhsa [17]

Answer:

The compound was a 3° alcohol.

Explanation:

The chromic acid test is positive for 1° and 2° alcohols, but negative for 3° alcohols.

4 0
3 years ago
The goal of the Human Genome Project was to _____.
ahrayia [7]
<h3>Question :</h3>

The goal of the Human Genome Project was to _____.

  • locate specific genes that caused given diseases

  • identify the RNA of the human genome

  • promote friendliness among the various sciences

  • map the entire human genome

<h3>Answer : </h3>

The goal of the Human Genome Project was to <u>map the entire human genome</u><u>.</u>

So, the correct option is 4th one.

6 0
2 years ago
Read 2 more answers
If the ionization constant of water, kw, at 40°c is 2.92 × 10-14, then what is the hydronium ion concentration and ph for an aci
charle [14.2K]

Answer is: the hydronium ion concentratio is 1.71×10⁻⁷ mol/dm³ and pH<6.76.

The Kw (the ionization constant of water) at 40°C is 2.94×10⁻¹⁴ mol²/dm⁶ or 2.94×10⁻¹⁴ M².

Kw = [H₃O⁺] · [OH⁻].

[H₃O⁺] = [OH⁻] = x.

Kw = x².

x = √Kw.

x = √2.94×10⁻¹⁴ M².

x = [H₃O⁺] = 1.71×10⁻⁷ M; concentration of hydronium ion.

pH = -log[H₃O⁺].

pH = -log(1.71×10⁻⁷ M).

pH = 6.76.

pH (potential of hydrogen) is a numeric scale used to specify the acidity or basicity an aqueous solution.

5 0
2 years ago
Read 2 more answers
A scientist investigates on two unknown solutions. Which is not a scientific experiment she can perform on the solutions?
Serga [27]
As you can search and read the definition of a scientific experiment is the process of testing and finding the truth through this scientific method. Thus, all items are considered scientific experiment except for item "c" Ask her coworkers which solution they thick is better.
6 0
2 years ago
Read 2 more answers
A nitrox ii gas mixture for scuba diving contains oxygen gas at 53 atm and nitrogen gas at 94 atm . what is the total pressure,
Alina [70]

Answer: The total pressure will be 1,11,720 torr.

Explanation:

Partial pressure of nitrogen gas.p_{N_2}=53 atm=53\times 760 torr= 40,280 torr (1atm = 760 torr)

Partial pressure of oxygen gas,p_{O_2}=94 atm=94\times 760 torr=71,440 torr

Total pressure, in torrs, of the scuba gas mixture = 40280 + 71440 torr =111,720 torr

Hence , the total pressure in scuba gas mixture is 111,720 torr.

6 0
3 years ago
Other questions:
  • What are weak bonds that allow flexibility in enzymes
    8·1 answer
  • a manufacturer claims its cleanser work twice as fast as any other . could testt be performed to support the claim?
    13·1 answer
  • A scientist is studying a compound that includes nitrogen, carbon, oxygen, and hydrogen. Is the scientist studying an organic mo
    6·2 answers
  • An experiment calls for you to use 100 mL of 0.25 M HNO3 solution. All you have available is a bottle of 3.4 M HNO3. How many mi
    6·1 answer
  • What happens to an atom's overall charge if it loses or gains electrons?
    12·1 answer
  • As the first five elements in Group 15 are considered in order of increasing atomic number, first ionization energy increases, t
    7·1 answer
  • In a quasi-static isobaric expansion, 700 J of work are done by the gas. If the gas pressure is 0.40 atm, what is the fractional
    10·1 answer
  • What is the mass of 12.3 moles of helium (He)?
    15·1 answer
  • The source of alpha particles in a smoke detector is the
    11·1 answer
  • Write a balanced equation of decomposition reaction which is carried out by the catalyst
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!