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Sophie [7]
2 years ago
14

A horse runs 1 km in 15 s. What is the average speed

Chemistry
1 answer:
Reptile [31]2 years ago
6 0

The average speed of the horse for the entire motion is 66.67 m/s.

The given parameters;

  • <em>distance traveled by the horse, d = 1 km = 1,000 m</em>
  • <em>time of motion of the horse, t = 15 s</em>

The average speed of the horse is calculated by dividing the total distance traveled by the horse by the time of motion.

The average speed of the horse is calculated as follows;

average\ speed = \frac{distance}{time} \\\\average\ speed =  \frac{1000 \ m}{15 \ s} = 66.67 \ m/s

Thus, the average speed of the horse for the entire motion is 66.67 m/s.

Learn more here: brainly.com/question/17289046

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3 years ago
A student standardizes a solution of aqueous NaOH against a measured mass of solid potassium hydrogen phthalate. She then uses t
wlad13 [49]

Answer:

(D) Neither I nor II

Explanation:

The reagent potassium hydrogen phthalate is found in pure form and it is not partially hydrated .

The pallet form of NaOH ( solid form )  absorbs carbon dioxide gas from the atmosphere but NaOH in solution form does not absorb carbon dioxide .

Hence option D ) is right choice .

8 0
3 years ago
N2O4(g) + 4H2(g) → N2(g) + 4H2O(g), solve using standard enthalpies of formation
aev [14]

The standard enthalpy of formation (ΔH_f) is a measure of the energy released or consumed when one mole of a substance is created under standard conditions from its pure elements.

Standard enthalpies (ΔH_f) of formation for given reaction is 978.3 kJ

<h3>What is Standard enthalpies of formation?</h3>

The standard enthalpy of formation is defined as the enthalpy change when one mole of a substance in the standard state (1 atm of pressure and 298.15 K) is formed from its pure elements under the same conditions.

Given reaction ;

N_2O_4(g) + 4H_2 (g) - > N_2(g) + 4H_2O(g)

To Find : ΔH_f

ΔH_f = ∑np ΔH_f (products) – ∑np ΔH_f (reactants)

ΔH_f = [1(ΔH_f N_2) + 4(ΔH_f H_2O)] – [1(ΔH_f N_2O_4) + 4(ΔH_f H_2)]

ΔH_f = [1(0) + 4(-241.8)] – [1(+9.16) + 4(0)]

ΔH_f  = [4(-241.8)] – [1(+9.16)] = 978.3 kJ

Learn more about Enthalpy here ;
brainly.com/question/16720480

#SJF1

7 0
2 years ago
Please help
iragen [17]
It is going to be neither hope this helps
4 0
3 years ago
C20H16+<br> _Cl2 →<br> C+<br> HCl<br> Please help me fast
marissa [1.9K]

Answer:

<em><u>1</u></em> C10H16 + <em><u>8</u></em> Cl2 --> <em><u>10</u></em> C + <em><u>16</u></em> HCl

4 0
2 years ago
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