NF 4

The figure below shows a flownet drawn below the concrete dam. Determine the Nf and Nd from the flownet.

• Nf = 4 , Nd = 9

• Nf = 5 , Nd = 11

• Nf = 5 , Nd = 10

• Nf = 4 , Nd = 10

The figure below shows a flownet for the condition of a line of sheet-piling driven into a stratum of homogenous sandy soil. Determine the number of flow lines and equipotential lines.

• Nf = 4, Nd = 14

• Nf = 5, Nd = 13

• Nf = 4.5, Nd = 13

• Nf = 4.5, Nd = 14

What is the chemical formula for nitrogen trifluoride?

Which of the following is a property of nitrogen trifluoride?

• It is a colorless gas.

• It is a solid at room temperature.

• It is a liquid at room temperature.

• It is a metallic compound.

What is the molecular geometry of nitrogen trifluoride?

• Trigonal planar

• Tetrahedral

• Trigonal pyramidal

• Linear

In the reaction of nitrogen trifluoride with water, what is one of the products formed?

• Ammonia

• Nitric acid

• Hydrogen fluoride

• Nitrogen gas

What is the primary use of nitrogen trifluoride in industry?

• As a refrigerant

• In semiconductor manufacturing

• As a fertilizer

• In food preservation

Which of the following best describes the bond between nitrogen and fluorine in nitrogen trifluoride?

• Ionic bond

• Covalent bond

• Metallic bond

• Hydrogen bond

Tags

NGSS.HS-PS1-1

What is the electron domain geometry of nitrogen trifluoride?

• Linear

• Trigonal bipyramidal

• Tetrahedral

• Octahedral

How many lone pairs of electrons are present on the nitrogen atom in nitrogen trifluoride?

• 0

• 1

• 2

• 3