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kakasveta [241]
3 years ago
8

Both astrology and astronomy study the stars the major difference is A astronomy is a science that uses the scientific method B

astrology is a science that uses the scientific method C astronomy is based on opinions and beliefs D astrology is based on opinions and beliefs
Chemistry
1 answer:
SOVA2 [1]3 years ago
4 0
The major difference is A, because astrology is a pseudoscience, and that sets it apart from astronomy more than D.
You might be interested in
The following observations are made about two hypothetical elements A and B: The A?A and B?Bbond lengths in elemental A and B ar
Solnce55 [7]

Answer:

Explanation:

The concept of bond length is applied here. Bond length is the distance between the nuclei of atoms in molecules. it can be measured in different ways by X-ray diffraction. It should be noted that the shorter the bond length, the stronger the bond.

  • Given Bond length of A-A = 2ra, where ra = atomic radius of A
  • 2ra = 2.65 Å
  • similarly, bond length of B-B = 2rb = 1.84 Å, where rb = atomic radius of B
  • In AB2, separation between the two nuclei of B = rb + 2ra + rb
  • = 2rb + 2ra = 1.84 Å + 2.65 Å = 4.49Å

4 0
3 years ago
Pure sodium metal reacts violently with water according to the equation below
Kisachek [45]

Answer:

0.75 mol

Explanation:

Given data:

Number of moles of Na = 0.75 mol

Mass of water = 500 g

Moles of hydrogen gas produced = ?

Solution:

Chemical equation:

Na + H₂O   →      NaO + H₂

Number of moles of water:

Number of moles = mass/molar mass

Number of moles = 500 g/ 18 g/mol

Number of moles = 27.8 mol

now we will compare the moles of hydrogen gas with both reactant.

                   Na         :          H₂

                    1            :          1

                  0.75       :         0.75

                 H₂O        :          H₂

                   1            :           1

               27.8          :         27.8

sodium will act as limiting reactant it produced small number of moles of hydrogen gas as compared to water.

Thus, number of moles of hydrogen gas are 0.75 mol.

5 0
3 years ago
Which of the following is true about properties of covalent/ molecular bonds?
soldi70 [24.7K]

Answer:There are two types of atomic bonds - ionic bonds and covalent bonds. They differ in their structure and properties. Covalent bonds consist of pairs of electrons shared by two atoms, and bind the atoms in a fixed orientation. Relatively high energies are required to break them (50 - 200 kcal/mol). Whether two atoms can form a covalent bond depends upon their electronegativity i.e. the power of an atom in a molecule to attract electrons to itself. If two atoms differ considerably in their electronegativity - as sodium and chloride do - then one of the atoms will lose its electron to the other atom. This results in a positively charged ion (cation) and negatively charged ion (anion). The bond between these two ions is called an ionic bond.

3 0
3 years ago
Pls help asap!!!!!!!
Maru [420]
Can you send a better pic
7 0
3 years ago
1. What is the difference between accidental discoveries and scientific investigations?
Alenkasestr [34]

Answer:

the discovery will always need to be tested more where if you're investigating you should already be in a more controlled environment

4 0
3 years ago
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