The density of a substance is its mass per unit volume, given by the mass divided by the volume. Density depends on the substance of concern and doesn't matter whether one has a little amount of it or a whole full of it. Therefore, the density of the two smaller pieces is now the same as the original density.
Organisms with albinism hard to find in nature because Albino coloration reduces an organism's chance of survival. The correct option is B
Explanation:
The congenital defect in which there is an absence of any pigmentation in organism or plant is termed albino. Tyrosinase enzyme controls the dose of melanin in the skin if there is a defect in Tyr gene the albinism occurs.
They are unable to protect itself from UV rays and are unable to protect itself from predators as they lack camouflage (in case of alligators). The beautiful colour of skin makes them prey for poaching.
The person with albinism have pink or red eye as the pigment of iris is also absent.
The albinism can be due to mutation. Heredity, diet, environment or disease.
In plants lack of chlorophyll is a condition of albinism which prevents photosynthesis and hence no survival.
Answer:
6.02 × 10²³ atoms.
Explanation:
According to the Avogadro number, the one mole of any substance have 6.02 × 10²³ atoms.
The number 6.02 × 10²³ is called Avogadro number. it is the number of atoms, ions or molecules in one gram atoms of element, one gram ions of substance or one gram molecules of a compound.
For one mole of magnesium.
24.305 g of Mg = 1 mole of magnesium = 6.02 × 10²³ atoms of magnesium.
Other example includes:
18 g of water = one mole of water = 6.02 × 10²³ molecules of water.
23 g of sodium = one mole of sodium = 6.02 × 10²³ atoms of sodium.
Answer:
The theoretical yield of carbonic acid is 1.24 grams.
Explanation:
The balanced equation for the formation of carbonic acid by the reaction of carbon dioxide with water is:
CO₂ + H₂O → H₂CO₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reactant and product participate:
- CO₂: 1 mole
- H₂O: 1 mole
- H₂CO₃: 1 mole
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P * V = n * R * T
Moles of carbon dioxide can be calculated using ideal gas law equation. In this case:
- P= 101.3 kPa= 1 atm
- V= 495 mL= 0.495 L (being 1,000 mL=1 L)
- n=?
- R= 0.082
- T= 25 C= 298 K (being 0 C=273 K)
Replacing:
1 atm* 0.495 L= n* 0.082 *298 K
Solving:
n= 0.02 moles
Then, by reaction stoichiometry 0.02 moles of carbon dioxide produces 0.02 moles of carbonic acid.
Since the molar mass of carbonic acid is 62.03 g/mol, then you can apply the following rule of three: if there are 62.03 grams in 1 mole, how much mass is there in 0.02 moles?
mass= 1.24 grams
<em><u>The theoretical yield of carbonic acid is 1.24 grams.</u></em>
Answer:
Photosynthesis is the process in which plants harness energy from the sun to make their own nutrition. The process converts light energy into chemical energy through cellular respiration.
Explanation:
Just to start you off. I hope it helps! (❛ ᴗ ❛)
