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Questions in chemistry

📝 Answered - $HBr+KOH \rightarrow KBr+H_2 O$ In this reaction, the acid is A. HBr B. KOH C. KBr D. $H _2 O$

📝 Answered - What volume, in liters, of $1.0 M C_6 H_{12} O_6$ solution can be made using $360.4 g C_6 H_{12} O_6$? $C_6 H_{12} O_6: 180.2 g / mol$

📝 Answered - Which condition must be met in order for an equation to be balanced? A. The elements in the reactants are the same as the elements in the products. B. There are fewer elements in the reactants than there are in the products. C. The number of atoms in the reactants is greater than the number of atoms in the products. D. The number of atoms in the reactants equals the number of atoms in the products.

📝 Answered - Which substances are most likely acids? Check all that apply. [tex]$CH _4$[/tex] HI [tex]$NH _3$[/tex] [tex]$HNO _3$[/tex] NaCl

📝 Answered - The half-life of a particular radioactive substance is 1 year. If you started with 220 grams of this substance, how much of it would remain after 7 years? Remaining Amount $=I(1-r)^t$ grams

📝 Answered - Consider the following chemical reaction in equilibrium: [tex]$CH_3 COOH \Leftrightarrow CH_3 COO^{-}(a q)+H^{+}(a q)$[/tex] What will happen to the chemical equilibrium if [tex]$MgCl _2$[/tex] is added? A. The chemical equilibrium of the system will be unaffected. B. The chemical equilibrium of the system will shift to the right to favor the forward reaction. C. The chemical equilibrium of the system will be damaged irreversibly.

📝 Answered - Which equation shows the proper setup to find the volume of a $0.250 M CaCl _2$ solution that contains 39.5 g or $CaCl _2$? $0.250 M CaCl _2=\frac{39.5 g CaCl _2}{V}$ $V=39.5 g CaCl _2 \times \frac{1 mol CaCl }{110.98 g CaCl _2} \times \frac{1 L}{0.250 mol CaCl _2}$ $V=\frac{39.5 g CaCl _2}{0.250 M CaCl _2}$

📝 Answered - Match List I with List II: List I: A. Coke B. Diamond C. Fullerene D. Graphite List II: 1. Carbon atoms are sp³ hybridised 2. Used as a dry lubricant 3. Used as a reducing agent 4. Cage like molecules Choose the correct answer from the options given below: (A) A-4, B-1, C-2, D-3 (B) A-3, B-1, C-4, D-2 (C) A-3, B-4, C-1, D-2 (D) A-2, B-4, C-1, D-3

📝 Answered - Select the correct answer. What are the products of the acid-base reaction between [tex]$HNO _3$[/tex] and NaOH? A. [tex]$H _2 O$[/tex] and [tex]$NaNO _3$[/tex] B. NaH and [tex]$NO _3 OH$[/tex] C. HNOH and [tex]$NaO _3$[/tex] D. NaOH and [tex]$HNO _3$[/tex]

📝 Answered - In manufacturing of Cl₂ gas, according to the reaction: HCl + O₂ \xrightarrow{CuCl₂} {Cl is one isotope of chlorine} The probable products for this reaction are: (i) Cl₂ + H₂O (ii) Cl₂ + H₂O (iii) Cl-Cl + H₂O Which of the above three set of products can actually be obtained? (A) only (i) (B) (i) & (ii) (C) only (iii) (D) (i), (ii) & (iii)