Answer: True
Explanation:
Explanation:
The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.
It is dependent on the type of material and is fixed for a particular type of material. For example: The specific heat capacity of iron material is fixed and the value is 
B. The element nitrogen is made up only of nitrogen atoms.
Explanation:
Dalton stipulated , in his theory, that all the atoms of pure elements were identical. However different elements had different kinds of atoms that differ in their size and mass. The other stipulations of Dalton's theory were that atoms are the smallest unit of mass and were indivisible – this was later rebutted by advanced atomic theories .
Another major contribution by Dalton's theory is that chemical reactions involved the rearrangement of atoms observing the law of conservation of mass,
Answer:
B. High temp and low pressure
Explanation:
I got an A on my chem final :) Got this right.
Answer:
A
Explanation:
The correct answer would be that <u>the powdered magnesium reacts faster because it has a greater surface area</u>.
<em>The rate of reaction is defined as the rate of disappearance of the reactants in a reaction or the rate of conversion of appearance of products during a reaction. </em>
The rate of reaction is dependent on several factors such as the concentration of the reactants, temperature of the reaction, nature of reactants, and the presence or absence of catalysts during the reaction.
As far as the nature of reactants is concerned, the surface area of reactants comes into play. <em>Reactants with higher surface areas react faster than reactants with lesser surface areas</em>. Hence, powdery reactants react faster than solid reactants because the latter has a higher surface area than the former.
The correct option is A.
