Question

match the descriptions to the correct formula. has 21 total atoms has 3 elements has 9 oxygen atoms has 12 total atoms has 6 sodium atoms has 6 oxygen atoms has 4 elements has 2 sodium atoms is your work saved? go back to lab room organize it! 3na₂s₂o₃ 2nahco₃

Explanation:

Step1: Calculate total atoms for \(3Na_2S_2O_3\)

For \(Na_2S_2O_3\): \(2 + 2+3 = 7\) atoms per formula unit. With coefficient \(3\), total atoms \(=3\times7 = 21\)

Step2: Calculate total atoms for \(2NaHCO_3\)

For \(NaHCO_3\): \(1 + 1+1 + 3=6\) atoms per formula unit. With coefficient \(2\), total atoms \(=2\times6 = 12\)

Step3: Count elements in \(3Na_2S_2O_3\)

Elements: \(Na\), \(S\), \(O\) → \(3\) elements

Step4: Count elements in \(2NaHCO_3\)

Elements: \(Na\), \(H\), \(C\), \(O\) → \(4\) elements

Step5: Count Oxygen atoms in \(3Na_2S_2O_3\)

Per \(Na_2S_2O_3\): \(3\) O atoms. With coefficient \(3\), O atoms \(=3\times3 = 9\)

Step6: Count Oxygen atoms in \(2NaHCO_3\)

Per \(NaHCO_3\): \(3\) O atoms. With coefficient \(2\), O atoms \(=2\times3 = 6\)

Step7: Count Sodium atoms in \(3Na_2S_2O_3\)

Per \(Na_2S_2O_3\): \(2\) Na atoms. With coefficient \(3\), Na atoms \(=3\times2 = 6\)

Step8: Count Sodium atoms in \(2NaHCO_3\)

Per \(NaHCO_3\): \(1\) Na atom. With coefficient \(2\), Na atoms \(=2\times1 = 2\)

Answer:

• \(3Na_2S_2O_3\): Has 21 total atoms, Has 3 elements, Has 9 Oxygen atoms, Has 6 Sodium atoms
• \(2NaHCO_3\): Has 12 total atoms, Has 4 elements, Has 6 Oxygen atoms, Has 2 Sodium atoms