Answer:
<u>C) 4</u>
Explanation:
<u>The reaction</u> :
- C (s) + 2H₂ (g) ⇒ CH₄ (g)
12g 4g 16g
Hence, based on this we can say that : <u>2 moles of hydrogen gas are needed to produce 16g of methane.</u>
<u />
<u>For 32g of methane</u>
- Number of moles of H₂ = 32/16 × 2
- Number of moles of H₂ = <u>4</u>
Yes, Pb2+ react with KI.
Pb2+ is lead (II) ion
KI is a compound. It is a combination of potassium (K) and iodine (I). It is called potassium iodide.
Both potassium and iodine are highly reactive elements. Thus, when they are combined with another element like Pb2+, Pb2+ reacts with KI
Answer:
The correct answer is C (sodium chloride which is a salt human)
Explanation:
The sodium chloride whose formula is NaCl, corresponds to an ionic compound formed by a metal (Na) and a nonmetal (Cl). It corresponds to an inorganic substance, since it does not have carbon. Organic compounds are those that have carbon (example: glucose, methane, etc.)
The molarity of a solution prepared by diluting 25.71 mL of 0.0706 M ammonium sulfate to 500.00 mL is 0,0036M.
<h3>What is molarity?</h3>
- Molar concentration, also known as molarity, quantity concentration, or substance concentration, is a unit used to describe the amount of a substance in a solution expressed as a percentage of its volume.
- The number of moles per liter, denoted by the unit symbol mol/L or mol/dm3 in SI units, is the most often used unit denoting molarity in chemistry.
- One mol/L of a solution's concentration is referred to as one molar, or 1 M.
<h3>What is the molarity unit in the SI?</h3>
- The most common unit for molarity in chemistry is moles per liter, which is represented by the unit sign mol/L or moldm3 in SI units.
Learn more about molarity here:
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