Answer: D) 36.0 km/hr, downstream
Explanation:
For downstream motion of the boat, the actual velocity of the boat is the sum of velocity of the water current and the velocity of the boat due to pushed by wind.
Velocity of water current, v = 15 km/h
Velocity of the boat going downstream, u = 21 km/h
Actual velocity of the boat = v'
v' = v + u
⇒v' = 15 km/h + 21 km/h
⇒u = 21 km/h +15 km/h = 36.0 km/h downstream
Thus, the correct answer is option D.
Answer:
Mass = 627.2 g
Explanation:
Given data:
Number of moles of barium nitrate = 2.4 mol
Mass of barium nitrate = ?
Solution:
Formula:
Mass = number of moles × molar mass
Molar mass of barium nitrate = 261.337 g/mol
Mass = 2.4 mol × 261.337 g/mol
Mass = 627.2 g
First question. Applying ideal gas equation PV=nRT, P= 101.3 x 10³Pa = 1atm. therefore, 1 x 260 x 10^-3 = n x 0.082 x 294.( Temperature in kelvin=273+21). n = 0.01 moles. Volume of gas at STP= n x 22.4 = 0.01x22.4 = 0.224L. Hope this helps
They form a covalent bond
Answer: The word ‘Data’ means collection of information in the form of numerical figures, or a set of given facts. A data is a collection of numbers gathered to give some information.
Explanation: Visual representation of data will help us to understand it better and remember the facts easily. Hope this helped! :)