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Ivan
4 years ago
7

How many grams of water can be heated 20C by the addition of 1000J?

Chemistry
1 answer:
nydimaria [60]4 years ago
4 0
I hope this is correct

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Koja od navedenih atomskih orbitala nije moguća? a) 2d b) 3s c) 4p d) 5f​
pickupchik [31]

Answer:

2d

Explanation:

2d nije moguće. moguće je samo 3d do 7d. provjeri periodni sustav!

ako ne razumiješ, obrati mi pažnju

8 0
3 years ago
An atom has 9 electrons and 9 protons at the start. If it loses 2 electrons, the net charge on the atom will be 8-2-2+8+. If the
Mrrafil [7]

Answer: 1) p⁺ = 22; number of protons.

e⁻ = 19 - 1 = 18; number of electrons.

Net charge is +4, because atom has 4 protons more than electrons.

Proton is a subatomic particle with a positive electric charge of +1e elementary charge.

2) p⁺ = 22; number of protons.

e⁻ = 19 + 3 = 22; number of electrons.

Net charge is 0 (neutral charge), because atom has same number of protons and electrons.

Hope this helps :)

4 0
3 years ago
The orbit of a planet is an ellipse with the sunat one of the foci.. This is Kepler's........ second law third law first law​
Svetradugi [14.3K]

Answer:

its keplers first law

Explanation:

answer from gauth math

6 0
3 years ago
7. Ionic bonds are at one end of the bond spectrum. What kinds of bonds are at the other end?
blondinia [14]

Answer:

non-polar covalent bonds

this is when the electronegativity difference between the two non-metal atoms is very little to cause a partial charge (delta positive and delta negative; δ+ and δ-) on the atoms

4 0
2 years ago
How many molecules of CO are produced when 2.73 moles of HPO3 react? 4HPO3 + 12C ----> 2H2 + 12CO + P4
Zina [86]
According to the balanced chemical equation:
4 HPO₃ + 12 C → 2 H₂ + 12 CO + P₄
4 moles of HPO₃       ---gives---> 12 moles of CO
2.73 moles of HPO₃  ---gives---> ? moles of CO
so number of moles of CO = \frac{(2.73 * 12)}{4} = 8.19 moles of CO
Number of molecules of CO = number of moles * Avogadro's number
                                       = 8.19 * (6.022 * 10²³) = 4.93 * 10²⁴ molecules
3 0
3 years ago
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