Answer:
The tools/instruments, the type of seed, the soil or planting products, the amount of germination time/days, and where the seedling is placed.
Explanation:
If anything but the temperature is changed, it can result in false results. For instance, if Tamera uses red corn for one but yellow corn for the other, it can change the germination rate. So can the type of soil, water or the amount of time each plant has to grow. If she changes thermometers or any other tool she uses, it may give her a different result than the ones she used before. And finally, if she moves the warm plant from the windowsill to her bedroom, it can mess with the results she gets from the heated sample.
Answer:
v = 34.62 L
Explanation:
Given data:
Moles of H₂ = 2.50 mol
Temperature of gas = -20.0°C
Pressure of gas = 1.5 atm
Volume of gas = ?
Solution:
Formula:
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
-20 + 273 = 253 K
Now we will put the values in formula.
1.5 atm × v = 2.50 mol ×0.0821 atm.L/ mol.K × 253 K
1.5 atm × v = 51.93 atm.L
v = 51.93 atm.L/1.5 atm
v = 34.62 L
The volume of hydrogen is 34.62 L.
If water was nonpolar, life as it exists now would be impossible. Water is the means by which ionic substances ( Fe^3+, Na^+, Ca^2+, K^+, etc) and polar molecules are distributed around and in the cells of organisms.
<span>Water is a major contributor to erosion of mountains because of its polar nature. It is able to dissolve almost all minerals because of its attraction for the positive and negative parts of the minerals that it encounters. </span>
<span>If it was nonpolar, it would not exist in the solid and liquid state on earth. It is the attraction of the oppositely charged ends of different water molecules that makes it assume the liquid and solid state under the temperature ranges found on earth.</span>
The answer is the second option. The given conversion from L to dm3 is actually confusing. Just remember that 1 L = 1000 cm3.
Simply, multiply 2.6 by 1000 and we get 2600 cm. Converting this to scientific notation, we get the answer:
2.6 x 10^3 cm3
