What’s the purpose ?
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Arrow head shows the direction of products formed in a reaction. so we can say that it denotes the direction of the chemical reaction. I.e From Reactant to Product.
so, the correct choice is B
How many moles of sodium chloride (NaCl) are in (4.2x10^-41) molecules of sodium chloride (NaCl)?
The number of moles of sodium chloride in (4.2 x 10⁻⁴¹) molecules of sodium chloride is 6.973 × 10⁻⁶⁵
What are a number of moles?The mole is a SI unit of measurement that is used to calculate the quantity of any substance.
1 mole is 6.022 × 10²³
[tex]1\; molecule = \dfrac{1}{6.023 \times 10^2^3}[/tex]
The given number of moles are 4.2 x 10⁻⁴¹
[tex]Moles = 4.2 \times 10^-^4^1 \times \dfrac{1}{6.023 \times 10^2^3} = 6.973 \times 10^{-65}[/tex]
Thus, the number of moles of sodium chloride in (4.2 x 10⁻⁴¹) molecules of sodium chloride is 6.973 × 10⁻⁶⁵
Learn more about number of moles
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what are chemistry products
Answer:
Products are the species formed from chemical reactions. During a chemical reaction reactants are transformed into products after passing through a high energy transition state. This process results in the consumption of the reactants.
Explanation:
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word equation for BaCl2(aq) + Na2Cr4(aq) → BaCrO4(s) + NaCl(aq)
Explanation:
Word Equation
Barium Chloride + Sodium Chromate = Sodium Chloride + Barium Chromate
1 mole of aqueous Barium Chloride [BaCl2] reacts with 1 mole of aqueous Sodium Chromate [Na2CrO4] to form 2 moles of aqueous Sodium Chloride [NaCl] and 1 mole of solid Barium Chromate [BaCrO4]