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What is the coefficient in front of C3H8 when the following chemical equation is balanced?     C3H8 (g)  +     O2 (g)​  ⟶       CO2 (g)​   +     H2​O (g)

In which compound is iron present as iron(III) ion? 

Which of the following is/are considered to be a strong electrolyte? CH3COOH (aq)  NaNO3 (aq) C6H12O6 (aq) HBr (aq) NaCl (s)

In which compound is cobalt present as cobalt(III) ion?

Tums® tablets contain calcium carbonate (CaCO3), which neutralizes stomach acid (HCl). The balanced reaction is:  CaCO3 (s)  +  2 HCl (aq)  ⟶   CaCl2 (aq)  +  H2O(l)  +  CO2 (g) If a patient has 0.200 mol of stomach acid (HCl) to neutralize, and enough Tums were taken to completely neutralize it, how many grams of H2O will form? Hint: molar mass of H2O is 18.02 g/mol

Consider the following reactions:   2Mg(s) + O2​(g) ⟶ 2MgO(s)  2KClO3​(s)⟶ 2KCl(s) + 3O2​(g)  CH4​(g) + 2O2​(g) ⟶ CO2​(g) + 2H2​O(g)  HCl(aq) + NaOH(aq) ⟶ NaCl(aq) + H2​O(l)  AgNO3​(aq) + NaCl(aq) ⟶ AgCl(s) + NaNO3​(aq)  CaO(s) + H2O(l) ⟶ Ca(OH)2 (aq) Which reaction(s) is/are double displacement – precipitation reactions?

Why is it not practical to use an arbitrary reversible substitution cipher of the kind shown in the following table ( Table 4.1 in the textbook)? Question2.jpg

What is a meet-in-the-middle attack?

What’s the difference between a block cipher and a stream cipher?

The nurse receives a medication order for Heparin 10,000 units subcutaneous daily. The nurse recalls the hospital protocol is 5,000 units for prophylaxis. Which critical thinking action should the nurse take first?