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malfutka [58]
3 years ago
7

1) A toy car with a mass of 2.35 kg is pushed with a force of 21.6 N. What is the acceleration of the car?

Chemistry
1 answer:
Nataly_w [17]3 years ago
6 0

Answer:

The acceleration of the car is 9,19 m/s2

Explanation:

We use the formula: F=m x a---> a=F/m

a=21,6N/ 2,35kg       1N is 1kgxm/s2

a=21,6 kg x m/s2 x 2,35 kg

a=9,191489362  m/s2

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1085.6185269999999 units

Explanation:

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Answer:

5.00 × 10⁻⁴ mol HCl; 100 mL NaOH

Step-by-step explanation:

3. Moles of HCl

<em>Data: </em>

V(HCl) = 500 mL

    pH = 3

<em>Calculations: </em>

            pH = 3

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Moles HCl = volume × concentration

                 = 0.500 L × (10⁻³ mol/1 L)

                 = 5.00 × 10⁻⁴ mol

4. Volume of NaOH

NaOH + HCl ⟶ NaCl + H₂O

<em>Data: </em>

[NaOH] = 0.01 mol·L⁻¹

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V(HCl) = 50 mL

<em>Calculations: </em>

    Moles HCl = 0.050 L × (0.02 mol/1 L)

                      = 1.0 × 10⁻³ mol

Moles NaOH = 1.0 × 10⁻³ mol HCl × (1 mol NaOH/1 mol HCl)

                      = 1.0 × 10⁻³ mol NaOH

      V(NaOH) = 1.0 × 10⁻³ mol NaOH × (1 L NaOH/0.01 mol NaOH)

                      = 0.1 L NaOH     Convert to millilitres

                      = 100 mL NaOH

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As a result, melting point of the compound will be high. On the other hand, more is the branching present in a carbon chain less will be the surface area occupied by it. Hence, smaller will be its melting point.

Therefore, in the given structures of (C_{7}H_{16}) as the branching increases there occurs a decrease in melting point.    

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