A. Na2S+CaCl2 CaS + Na → C. Zn(s) + H₂SO4 → ZnSO4+H2 1 B. Cu (g) → Cu²(g) + le D. Cu(g) → Cu¹*(s) + le Q13. Which equation correctly represents the first ionization of copper? A. Cu(g) → Cu¹* (g) + le C. Cu(s) → Cut(g) +le
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
chemistry, Quicccckly please solve question 13
![Q1. What is the volume of 0.40 M H3PO4 solution needed to neutralize 500.0 mL of 0.30 M Ca(OH)2?
A. 200 mL
B. 250 mL
D. 400mL
Q2. 20 g NaOH are dissolved in water 500 mL. 10. mL of this solution was diluted 100 mL solution
C. 500 mL
What is M of the diluted solution?
A. 4.0 M
B. 0.40 M
Q3. Which of the following is insoluble in water?
A. Ca(HCO3)2
B. H₂S
C. BaCO3
Q4. What is its frequency (s) of a photon that has an energy of 5.53 × 10-¹7 J?
A3.59 × 10-⁹
B. 1.20 × 10-17
C. 8.35 x 10¹6
D. 2.78 × 108
Q5. What mass of AgCl is produced if 600 mL of 1.0 MAgNO3 and 400 mL of 2.0 M NaCl are reacted?
A. 57.3 g
B. 86.0 g
C. 14.3 g
D. 28.6 g
Q6. What are the spectator ions when Bal2 and K2SO4 react in aqueous solution?
A. Ba²+, 1¹-
B. K+, SO4²-
C. K¹, 1¹-
A.
C.
1
C. 0.10 M
Q7. Which of the following electron configurations in the ground state is correct?
A. Cu: [Ar] 4s²3d8
C. Cut: [Ar]3d¹⁰
Q8. What is the λ of light that is emitted when an excited electron in the hydrogen atom falls from n = 4 to n = 1?
B. Cu*: [Ar] 4d¹0
D. Cu: [Kr]3d¹0
A. 97.2 nm
C. 3.65 x 10² nm
B. 82.6 nm
D. 6.12 x 10-2 nm
Q9 When the following equation is balanced in acidic solution, the coefficients for H¹, MnO4 and H₂0 are?
2MnO4¹ (aq) +3SO3(aq) + 2H(aq) + 2MnO2(s) + 3SO4²(g) + H₂O
C. 3, 2, 1
A. 1, 2, 3
B. 2, 2.3
D. 2, 2, 1
Q10. Which of the following sets of quantum numbers (n, 1, ral, ms) refers to a 5d orbital?
A. (5, 3, 1, +1/2)
E. (4, 2, 1, +1/2)
C. (5, 2, -2, -1/2)
D. (5, 2, 3, -1/2)
Q11. Which represents the ground state for O¹¹?
2s
2p
↑↓
1
11
1
1
1
Q12. Which of the following reactions is a metathesis reaction?
→ CaS+ NaCl
A. Na2S +CaCl₂
ZnSO4+ H₂
C. Zn(s) + H₂SO4
Q13. Which equation correctly represents the first ionization of copper?
A. Cu(g) → Cu¹* (g) + le`
C. Cu(s) → Cut (g) +le
B.
D.
2s
D. 2.0 M
↑↓
D. Na2SO4
D. Ba²+, SO4²-
리리
2p
↑↑
B. H₂+ F22HF
D. NaOH + H3PO4 Na3PO4+ 6H₂O
B. Cu (g) →→ Cu²(g) + le
D. Cu(g) → Cu¹*(s) + le](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fda89c68f-5ffb-4b8d-b00b-585c8d396ffa%2F027ebbb2-6306-4524-88d6-19db7befe7ef%2Frc4hqbt_processed.jpeg&w=3840&q=75)

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