Hiiii! I was wondering about getting some help real quick.
1. A student mixed two clear liquids together in a beaker and a solid precipitate formed. His data is shown in the table below.
Liquid reactant A - 10g
Liquid reactant B - 17g
Beaker + solid product - 32g
What is the mass of the beaker?
A. 5g**
B. 10g
C. 15g
D. 17g
E. 32g
2. Sodium is a metal and chlorine is a poisonous gas. Neither is safe to eat. However, when sodium and chlorine combine, it produces edible table salt. What can be concluded?
A. Table salt has similar physical properties of both reactants.
B. Table salt is a metalloid with properties of both reactants.
C. Other ingredients have been added to make table salt safe.
D. Products are chemically different from reactants.**
3. Hydrogen gas (H2) and chlorine gas (Cl2) react to form hydrochloric acid (HCl). What is the correct balanced chemical equation for this reaction?
A. 2H2 + 2Cl2 -> HCl
B. H2 + Cl2 -> 2HCl**
C. 2H2 + Cl2 -> 2HCl
D. H2 + Cl2 -> HCl
4. According to the law of conservation of mass, what should the product side of this single replacement reaction look like?
Zn + 2HCl ->?
A. H2 ZnCl2
B. H2 + Zn + Cl2
C. H2 + ZnCl2**
D. ZnCl2
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