The number of grams of agarose that you need to make 200 ml of 2% agarose gel is 4 grams
calculation
number of grams is calculated using M/v x100 =% m/v formula
M (mass) =?
V(volume) = 200 ml
%(M/V) = 2%
convert the 2 % M/V into fraction = 2/100
then substitute the values into the equation
= M/200 ml = 2/100
multiply both side by 200
M is therefore = 2/100 x200
M=4 grams
The periodic trend of reactivity depends on whether the elements are metals or nonmetals. For metals, reactivity increases down a group and from right to left across a period. Nonmetals do the opposite. For nonmetals, reactivity increases up a group and from left to right across a period. Therefore, the rank is as follows:
Fluorine
Selenium
Neon
Hope this answers the question. Have a nice day.
Answer:
D
Explanation:
Because speed is a scalar quantity which he has only magnitude and no direction while velocity is a vector quantity because it has both magnitude and direction.
1.08 atm is the pressure for a certain tire in atmosphere.
<u>Explanation:</u>
One kilo pascal (1 kPa) corresponds to 1000 pascal. Another common unit used for pressure is atmosphere (symbolised as ‘atm’). 1 atm refers the standard atmospheric pressures and corresponds to 760 mm Hg and 101.3 kPa. Atmospheric pressures are commonly referred as square inches (psi)/ pounds.
Given:
The air pressure for a certain tire = 109 kPa
We need to find pressure in atmospheres
So, we know,
1 atm = 101.3 kPa
Hence,
1.08 atm is the pressure for a certain tire in atmosphere.
Answer:
nucleus
Explanation:
it holds information needed to regulate most of the cell functions
