Question

section a: multiple choice (choose the best answer)

1. which career pathway focuses primarily on the treatment and care of patients?

a. diagnostic services
b. therapeutic services
c. health informatics
d. biotechnology research

1. which educational level is typically required to become a registered nurse (rn)?

a. certificate only
b. associate or bachelor’s degree
c. master’s degree only
d. doctoral degree

1. which team member is primarily responsible for diagnosing illnesses using imaging or laboratory tests?

a. medical assistant
b. diagnostic technician
c. health information specialist
d. administrator

1. which leadership style encourages team input and shared decision - making?

a. autocratic
b. democratic
c. laissez - faire
d. bureaucratic

within a water molecule: covalent bonding (intramolecular)
h - o - h

etween two or more water molecules: (intermolecular force)
h₂o … h₂o … h₂o

• compounds with high intermolecular forces have high melting point, high boiling point, high viscosity.
• because of high intermolecular forces, water has a high boiling point (100 degree c) and high freezing point (0 degree c)

9a. define allotropes: an element exists in different physical forms.
b. the different allotropes of carbon (c) are coal, graphite, diamond (is a hard substance, is used to cut glass) and _________________________.

unit 5 & unit 6: introduction to chemical reactions & chemical equations (aks 4a - 4d)

1. balance and classify each of the following reactions. \t\treaction type

a. __li₂s + mg(no₃)₂ → lino₃ + mgs \t__
b. __fe + hcl → fecl₂ + h₂ \t\t__
c. __kclo₃ → kcl + o₂ \t\t__
d. __ch₄ + o₂→ co₂ + h₂o + heat \t__
e. __h₂ + o₂ → h₂o \t\t__

1. complete the following single replacement and double replacement reactions:
2. mg + hcl →
3. na + agno₃ →

Explanation:

Step1: Balance the reaction \( \text{Li}_2\text{S} + \text{Mg(NO}_3\text{)}_2

ightarrow \text{LiNO}_3 + \text{MgS} \)

• For Li: Left has 2, right has 1. So put 2 in front of \( \text{LiNO}_3 \).
• For \( \text{NO}_3 \): Left has 2 (from \( \text{Mg(NO}_3\text{)}_2 \)), right now has 2 (from \( 2\text{LiNO}_3 \)).
• For Mg: Left has 1, right has 1 (from \( \text{MgS} \)).
• For S: Left has 1, right has 1 (from \( \text{MgS} \)).

So balanced equation: \( 1\text{Li}_2\text{S} + 1\text{Mg(NO}_3\text{)}_2
ightarrow 2\text{LiNO}_3 + 1\text{MgS} \). Reaction type: Double Replacement (DR) as ions swap.

Step2: Balance \( \text{Fe} + \text{HCl}

ightarrow \text{FeCl}_2 + \text{H}_2 \)

• For Fe: Left 1, right 1.
• For Cl: Left 1, right 2. So put 2 in front of \( \text{HCl} \).
• For H: Left 2 (from \( 2\text{HCl} \)), right 2 (from \( \text{H}_2 \)).

Balanced: \( 1\text{Fe} + 2\text{HCl}
ightarrow 1\text{FeCl}_2 + 1\text{H}_2 \). Reaction type: Single Replacement (SR) as Fe replaces H.

Step3: Balance \( \text{KClO}_3

ightarrow \text{KCl} + \text{O}_2 \)

• For K: Left 1, right 1.
• For Cl: Left 1, right 1.
• For O: Left 3, right 2. Find LCM of 3 and 2 (6). So put 2 in front of \( \text{KClO}_3 \), 2 in front of \( \text{KCl} \), 3 in front of \( \text{O}_2 \).

Balanced: \( 2\text{KClO}_3
ightarrow 2\text{KCl} + 3\text{O}_2 \). Reaction type: Decomposition (Decomp) as one compound breaks down.

Step4: Balance \( \text{CH}_4 + \text{O}_2

ightarrow \text{CO}_2 + \text{H}_2\text{O} + \text{Heat} \)

• For C: Left 1, right 1 (from \( \text{CO}_2 \)).
• For H: Left 4, right 2 (from \( \text{H}_2\text{O} \)). So put 2 in front of \( \text{H}_2\text{O} \).
• For O: Left 2 (from \( \text{O}_2 \)), right 2 (from \( \text{CO}_2 \)) + 2 (from \( 2\text{H}_2\text{O} \)) = 4. So put 2 in front of \( \text{O}_2 \).

Balanced: \( 1\text{CH}_4 + 2\text{O}_2
ightarrow 1\text{CO}_2 + 2\text{H}_2\text{O} + \text{Heat} \). Reaction type: Combustion (Combu) as it's a hydrocarbon burning.

Step5: Balance \( \text{H}_2 + \text{O}_2

ightarrow \text{H}_2\text{O} \)

• For H: Left 2, right 2 (from \( \text{H}_2\text{O} \)).
• For O: Left 2, right 1 (from \( \text{H}_2\text{O} \)). So put 2 in front of \( \text{H}_2\text{O} \), then 2 in front of \( \text{H}_2 \).

Balanced: \( 2\text{H}_2 + 1\text{O}_2
ightarrow 2\text{H}_2\text{O} \). Reaction type: Synthesis (Syn) as elements combine.

Answer:

a. Coefficients: \( 1, 1, 2, 1 \); Reaction type: Double Replacement
b. Coefficients: \( 1, 2, 1, 1 \); Reaction type: Single Replacement
c. Coefficients: \( 2, 2, 3 \); Reaction type: Decomposition
d. Coefficients: \( 1, 2, 1, 2 \); Reaction type: Combustion
e. Coefficients: \( 2, 1, 2 \); Reaction type: Synthesis