ANSWER
EXPLANATION
Given that
The energy released by the system is 12.4J
Work done on the surrounding is 4.2J
Follow the steps below to find the change in energy
In the given data, energy is said to be released to the surroundings
Recall, that exothermic reaction is a type of reaction in which heat is released to the surroundings. Hence, change in enthalpy is negative
Step 1; Write the formula for calculating change in energy
Since heat is released to the surrounding, then q = -12J
Recall, that work done by the system on the surroundings is always negative
Hence, w = -4.2J
Step 2; Substitute the given data into the formula in step 1
Therefore, the change i
Weather
Explanation:
Meteorology is the study of weather.
Meteorologists are scientists that helps to predict weather phenomenon around us.
The use several data gathered from different weather stations around to make precise predictions about the likelihood of a particular weather condition.
Meteorologists most times use computer models to predict and forecast both long and short term weather conditions.
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Very body wants to achieve equilibrium so charge moves from high concentration to low concentrations.
#2 balloon has more number of negative charge and same number of +ve charge.
when both the balloons will be touched with each other then charge from balloon 2 will move towards balloon 1
If #1 balloon has more -ve charge then charge will flow from #1 towards #2 balloon. when they will be touched together.
False, because oxygen becomes water
Answer:18 g
Explanation:
The molar mass of dextrose is obtained as shown. Then the formula for number of moles is applied as shown in the image. Number of moles= mass/molar mass= concentration × volume. The volume is measured in dm3 hence the denominator of 1000. By making mass of solute the subject of the formula, we obtain the mass of dextrose requited to prepare the desired concentration of solution in the desired volume.