A. Iron is the best insulater
Answer:
27 amu
Explanation:
The alpha particles is Helium nuclei.
Atomic mass is the sum of the neutrons and protons.
Helium have two protons and two neutrons thus its atomic mass is 4 amu.
₂He⁴
Sodium atom have 12 neutrons and 11 protons. Thus its mass number will be
23 amu.
When it combine with alpha particle it mass will be 27 amu.
23 amu + 4 amu = 27 amu.
Thus new sodium atom have 14 neutrons and 13 protons.
Answer:
Nature involves the charecterists we inherit through our genes, hence why we often hear the phrases “You’re just like you’re mother/father” from friends or other family members. Whereas, nurture includes the influence of the environment or our surroundings within childhood, on our later personalities and behaviour.
<span>There are a number of ways
to express concentration of a solution. This includes molarity. It is
expressed as the number of moles of solute per volume of the solution. To convert the mass of the solute to moles, we use the molar mass of the substance. We calculate as follows:
MOlarity = 4.725 g ( 1 mol / 58.45 g ) / .5 L = 0.162 mol / L</span>
Answer:
b. Bakelite
Explanation:
Bakelite -
Bakelite is a form if plastic , and is the very first plastic synthesized .
The handles of the cooking utensils are used to hold the utensil firmly , and hence need not turn hot while cooking , and need to be strong enough to take care of the food .
Hence , the handle should be of the material which is poor conductor of heat and strong .
Hence , bakelite is used for making the handle.
