Energy is defined as theA ability to cause change in matter or the capacity to do work
B amount of matter in a substance
c feree times distance-
D distance divided by the time


Answer 1




ability to cause change in matter or the capacity to do work

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A compound contains 70.18 % oxygen by mass. What mass of this compound would be needed to obtain 48.45 grams of oxygen?
What is biodiversity? I don't really understand...

Which contributes to the polarity of a water molecule?B. deflection of hydrogen atoms by lone pairs of electrons
C. no difference in the electronegativity of oxygen and hydrogen


C. no difference in the electronegativity of oxygen and hydrogen
c ill give you an explanation
a concept in chemistry which describes how equally bonding electrons are shared between atoms

A force of 12.5 N is appiled to 10 kg mass


To find the acceleration, use the formula: force= mass x acceleration.12.5 N = 10 x AccelerationAcceleration = 12.5 / 10Acceleration = 1.25Hope this helps :)

Determine the total mass of ethanol produced when 279. Grams of glucose rescts completely to form ethanol and 132 grams of carbon dioxide.


The two main postulates that was given by Antoine Lavoisier are, oxygen play an important role in combustion and the other is mass of the reactant and product is conserved. The mass of ethanol is 147gram.

What is law of conservation of mass?

According to Law of conservation of mass, mass can neither be created nor be destroyed. Mass can only be transformed from one form to another. The law of conservation of mass was given by Antoine Lavoisier. Every reaction in nature follow the law given by Antoine Lavoisier that is mass is always conserved.

Glucose\rightarrowethanol+ carbon dioxide

Mass of glucose=279. Grams

Mass of  carbon dioxide= 132 grams

According to law of conservation f mass

Mass of Glucose= mass of ethanol+ mass of carbon dioxide

Substituting the values we get

279. Grams = mass of ethanol+ 132 grams

Mass of ethanol =147gram

Therefore the mass of ethanol is 147gram.

To know more about law of conservation of mass, here:


279 g * (1 mol/180.559g glucose) * (2 mol ethanol/1 mol glucose) * (46.068g ethanol/1mol) =

142 g ethanol produced

Name one Importance of solar power


Because the sun is a sustainable source of energy that can be used to power homes and businesses globally. 

How does increasing the concentration of one of the reactants affect the reaction?


If there is more of a particular reactant, the rate of the reaction would change, if that reactant is the limiting reagent then changing the concentration of that reactant could lead to a change in the amount of unused material after the reaction has stopped. 
I hope that was helpful.

Final answer:

In chemistry, increasing the concentration of one of the reactants increases the reaction rate because there are more reactant particles available for successful collisions and subsequent reactions.


In the field of chemistry, the concentration of reactants can significantly impact the rate of a reaction. According to the rate law, the rate of a reaction is directly proportional to the concentration of the reactants. Therefore, if you increase the concentration of one of the reactants, the reaction rate will also increase. This is because there are more particles available to collide and react, which increases the likelihood of successful collisions, thereby accelerating the reaction rate. For example, if you have a cup of tea and you increase the concentration of sugar (one of the reactants), the sugar will dissolve faster, indicating a faster reaction rate.

Learn more about Concentration and Reaction Rate here:


What is the mass of 225 cm ^3 of ethanol? ethanol has a density of 0.789 g/cm^3



177.53 grams


To find this, change the density equation from d=(m)/(v) to dv=m , doing this will allow you to multiply your given density (0.789 g/cm^3) by your given volume (225cm^3), giving your mass of 177.53 grams.