Answer:
Hydrogen(H) and Heluim(He)
Explanation:
These are the only two valennce electrons and 1 energy levels.
Quartz is a substance because the material has uniform properties throughout and is held together via chemical bonds.
Answer:
gravaity is the force that helps you
Answer: 25g/ml
Explanation:
Density = 100.0g/ 4.0mL = 25g/mL
The maximum concentration of calcium ions (Ca₂+) in a solution that
contains CO₃ will be 6.18 × 10⁻⁸. The correct option is D).
<h3>What is concentration?</h3>
The concentration of any substance is the presence or the amount of that substance in a specific place. It is also called the molar mass of the substance.
Ksp is the solubility equilibrium of a substance when it remains in its solid state.
The chemical equation will be
CaCO₃ ⇌Ca²⁺+CO₃²⁻
Ksp = [Ca²⁺][CO₃²⁻]
given Ksp = 3.4 × 10⁻⁹ [CO₃²⁻] = 0.055M
[Ca²⁺] = Ksp / [CO₃²⁻] 3.4×10⁻⁹ / 0.055 = 6.18 × 10⁻⁸
Thus, the Ksp of CaCO₃ = 6.18 × 10⁻⁸. The correct option is D).
To learn more about concentration, refer to the link:
brainly.com/question/17102479
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