Answer:
The correct answer will be option-instructions for each specific function
Explanation:
DNA is known as the genetic and heredity material of the organism which provides instructions to the cell to perform functions.
The biochemistry of DNA suggests that the arrangement of different nitrogenous bases controls different functions of the cell as they form proteins through the transcription and translation process.
Therefore, DNA controls the cell and its function by providing instructions to the organelles in the form of proteins and thus, the selected option is the correct answer.
Reaction of Copper with Mercuric Nitrate is as follow,
Cu + Hg(NO₃)₂ → Cu(NO₃)₂ + Hg
According to equation,
1 Mole of Cu reacts to form = 1 Mole of Hg
So,
1.20 Moles of Cu will react to produce = X Moles of Hg
Solving for X,
X = (1.20 mol × 1 mol) ÷ 1 mol
X = 1.20 mol of Hg
Result:
1.20 mole of Cu when reacted with mercuric nitrate produces 1.20 moles of Hg.
Answer : The correct option is a car's velocity changes from 25 m/s to 20 m/s in 5 seconds.
Explanation :
Acceleration : It is defined as the change in velocity divided by the time.
The formula of Acceleration is,
So, we can calculate the acceleration only for 2nd option which is a car's velocity changes from 25 m/s to 20 m/s in 5 seconds.
In this option, velocities and time are given.
In all the other options, the velocity and time are not given. So, we can not calculate the acceleration.
Hence, the correct option is a car's velocity changes from 25 m/s to 20 m/s in 5 seconds.
The reaction between zinc and hydrogen gas is:
Zn + H₂ → ZnH₂
So for every 1 mole of H₂ gas, it needs 1 mole of Zinc. The atomic weight of H2₂ is 2 g/mol, and Zinc is 67.425 g/mol. The density of H₂ at atmospheric pressure and at 293 K is 0.00016 g/mL. The solution is as follows:
Mass = Density*Volume = (0.00016 g/mL)(150 mL) = 0.024 g H₂
Moles H₂ = 0.024 g H₂ * 1 mol/2 g = 0.012 mol H₂
Thus, it also needs 0.012 mol Zn.
Mass of Zn needed = 0.012 mol * 67.425 g/mol = <em>0.8091 g Zn</em>
non-metals are brittle.
but for brittle property, they need to be solid.
sulphur is solid at STP.
Argon(Ar) is a gas at STP, so it cannot be brittle.