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
____ [38]
3 years ago
7

Alchemy is a branch of ancient knowledge that states that the only three essential substances in nature are salt, sulfur, and me

rcury.
Which of these best explains whether alchemy is a science or pseudoscience? (4 points)
It is pseudoscience because ancient knowledge is mystical yet reliable.
It is pseudoscience because there are at least 118 known elements in nature.
It is a science because sulfur and mercury are known to be important elements.
It is a science because salt is a commonly used compound in several laboratory experiments.
Chemistry
1 answer:
Ivanshal [37]3 years ago
4 0

Answer:

It is pseudoscience because there are at least 118 known elements in nature.

Explanation:

Alchemy is an ancient branch of natural philosophy (not used much anymore).

I also just took the test and it's correct.

You might be interested in
If 190dm of hydrogen gas collected at 20°c and 760mmHg .Calculate it's volume at stp (standard pressure=760mmHg
Andrei [34K]

Answer:

177.1 L

Explanation:

The excersise can be solved, by the Ideal Gases Law.

P . V = n . R . T

In first step we need to determine the moles of gas:

We convert T° from, C° to K → 20°C + 273 = 293K

We convert P from mmHg to atm → 760 mmHg = 1atm

1Dm³ = 1L → 190L

We replace: 190 L . 1 atm = n . 0.082 . 293K

(190L.atm) / 0.082 . 293K = 7.91 moles.

We replace equation at STP conditions (1 atm and 273K)

V = (n . R .T) / P

V = (7.91 mol . 0.082 . 273K) / 1atm = 177.1 L

We can also make a rule of three:

At STP conditions 1 mol of gas occupies 22.4L

Then, 7.91 moles will be contained at (7.91 . 22.4) /1 = 177.1L

3 0
3 years ago
What is the density of object A? Does it sink<br> or float in water?
Oksana_A [137]

Answer:

~1.5 g/cm3 and it does NOT float in water.

Explanation:

If you look at the graph, Object A weighs ~6 grams and is ~4 cm3 in volume

Density = Mass/Volume

So 6 grams/4 cm3 = 1.5 g/cm3

Water has a density of 1 g/cm3 and because Object A density is higher than that of water, it sinks.

:)

3 0
3 years ago
What type of rock is show here? How do you know?
mart [117]

Answer:

Sedimentary Rock. You know from the fossils and remains of shells inside.

Explanation:

If it were igneous, the fossils would be melted away. Maybe not with metamorphic, but it's most likely sedimentary.

5 0
3 years ago
How many milliliters are in one milligram?
mariarad [96]
1 milliliters in one milligram.
8 0
3 years ago
How many atoms are in 163 g of calcium?
I am Lyosha [343]
<span>Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles.

163 g Ca (1 mol / 40.08 g) ( </span>6.022 x 10^23 atoms / 1 mol ) = 2.45 x10^24 atoms Ca
8 0
3 years ago
Read 2 more answers
Other questions:
  • What is formed from joining<br> positive and<br> negative ions
    14·1 answer
  • What is a mole in chemistry​
    10·2 answers
  • Find the mass of 1.0 x 1025 formula units of iron (II) phosphide
    13·1 answer
  • Identify the medium for the following waves:
    6·1 answer
  • Almost all of the lakes found in Texas are/were:
    12·2 answers
  • 76. Which of the following choices is not an example of an adaptation?
    12·1 answer
  • Help meeeeeeeee plzzzzzzzzzzzzzzzzzzzz
    11·2 answers
  • Can someone help me I am stuck on this question it would mean the world if u helped me =) have a nice day!
    12·2 answers
  • The H⁺ concentration in an aqueous solution at 25 °C is 9.1 × 10⁻⁴. What is [OH⁻]?
    9·1 answer
  • Consider this reaction, which occurs in the atmosphere and contributes to photochemical smog:
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!