Answer:
methane + oxygen → carbon dioxide + water
Explanation:
methane + oxygen → carbon dioxide + water
Answer:
A₅B₄
Explanation:
Since we have one atom of element A at the center of each face of the unit cell, since the unit cell is a cubic cell, we have 6 faces. Since the atom on the face of the unit cell is shared with another cell, we have half of it in the unit cell is shared So, the number of atoms per face is 1/2 atom/face × 6 faces = 4 atoms on the faces of the unit cell.
Also, we have 1 atom at each corner of the cubic unit cell. Since there are 8 corner in the cubic unit cell. Also, each atom at the corner is shared with 8 unit cells, so we have 1/8 atom per corner. So, the number of atoms per unit cell is 1/8 atom/corner × 8 corners = 1 atoms at the corners of the unit cell.
So, in total we have 4 + 1 = 5 atoms of element A in the unit cell.
Also, there are 4 atoms of element B in the unit cell.
So, the ratio of atoms of element A to element B is 5 : 4.
A:B = 5:4
So, the empirical formula of the compound containing elements A and B is A₅B₄
Answer: Crocodiles and tigers both have four legs
Explanation: Even when sharks and tigers are both meat eaters, the question is about similarities between tigers and crocodiles, so D is out. A is about crocodiles and sharks, so it's out also. B suits for sharks too, so it's out too. C is the most suitable answer, because both animals have four legs, which means that they belong to the group of quadrupede animals.
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:
100L of N2
Explanation:
First let us obtain the number of mole of NH3 that occupied 200L at stp. This can be achieved by doing the following:
1mole of NH3 occupied 22.4L at stp.
Therefore, Xmol mole of NH3 will occupy 200L i.e
Xmol of NH3 = 200/22.4 = 8.93moles.
Now let us generate a balanced equation for the reaction.
N2 + 3H2 —> 2NH3
From the equation above,
1mole of N2 produced 2moles of NH3.
Therefore, Xmol of N2 will produce 8.93moles of NH3 i.e
Xmol of N2 = 8.93/2 = 4.47moles
Now let us convert 4.47moles to N2 to Litres. This is illustrated below:
1mole of N2 occupied 22.4L at stp
Therefore, 4.47moles of N2 will occupy = 4.47 x 22.4 = 100L
Therefore, 100L of N2 is used in the reaction
