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3 years ago

If an object is thrown 60 m into the air and it takes the object 6 s to get there, what's the average speed of the object?

Chemistry

2 answers:

Ghella [55]3 years ago

7 0

Average speed = total distance / total time taken
= 60/6
= 10 m/s

tigry1 [53]3 years ago

4 0

Answer : The average speed of the object is, 10 m/s

Solution : Given,

Distance traveled by the object = 60 m

Time taken = 6 s

Average speed : It is defined as the distance traveled by an object in per unit time. The unit of average speed is, meter/second.

Formula used :

$\text{Average speed}=\frac{\text{Distance traveled}}{\text{Time taken}}$

Now put all the given values in this formula, we get the average speed of an object.

$\text{Average speed}=\frac{60m}{6s}=10m/s$

Therefore, the average speed of the object is, 10 m/s

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Given the following data:

bagirrra123 [75]

$176.0 \; \text{kJ} \cdot \text{mol}^{-1}$

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Let the three equations with $\Delta H$ given be denoted as (1), (2), (3), and the last equation (4). Let $a$ , $b$ , and $c$ be letters such that $a \times (1) + b \times (2) + c \times (3) = (4)$ . This relationship shall hold for all chemicals involved.

There are three unknowns; it would thus take at least three equations to find their values. Species present on both sides of the equation would cancel out. Thus, let coefficients on the reactant side be positive and those on the product side be negative, such that duplicates would cancel out arithmetically. For instance, $3 + (-1) = 2$ shall resemble the number of $\text{H}_2$ left on the product side when the second equation is directly added to the third. Similarly

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3 years ago

When 2 moles of Fe(s) react with Cl2(g) to form FeCl3(s) according to the following equation, 799 kJ of energy are evolved.

GenaCL600 [577]

Answer:

1. Exothermic.

2. -1598 kJ.

Explanation:

Hello!

1. In this case, according to the reaction, we can infer that 799 kJ of energy are evolved (given off, released) it means that the enthalpy of reaction is negative as the reactants have more energy than the products; which means this is an exothermic reaction.

2. Here, as we know that the enthalpy of reaction is -799 kJ/mol, we can compute the q-value as shown below, considering the reacted 2 moles of solid iron:

$q=2mol*-799 kJ/mol\\\\q=-1598kJ$

Which means that 1598 kJ of energy are evolved when 2 moles of solid iron react.

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Learn more about atomic numbers at brainly.com/question/2942556

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