Chemistry
number of carbon atoms in ethane
two
The descriptive study of motion
Kinematics
A rocket lifts off from the rest with an acceleration of 2 m/s2. Calculate its velocity after 25 s
:v=u+at
50m/s
Which of the following refers to the uniform accelerated motion in the y-axis?
A. Deceleration B. Free- Fall
C. Uniform acceleration D. Non- uniform acceleration
B. Free- Fall
Which of the following principle states that an atom must have 8 valence electrons in order to achieve stability?
Octet Rule
The ionic charge for neon
zero
set of quantities contains a vector quantity
:give three
velocity, acceleration, displacement, force, gravity
What is the mass of 8 moles of carbon dioxide?
Carbon=12.01g/m
Oxygen=16g/m
352.16g/mol
How do scientists obtain the atomic mass of an isotope?
A. Get the highest atomic masses of the isotopes.
B. Use the lowest atomic masses of the isotopes.
C. Add all the atomic masses of the isotopes.
D. Obtain the average atomic masses of the isotopes
D. Obtain the average atomic masses of the isotopes
Which of the following is a common property in compounds such as propene, hexene and octene?
A. They contain a carbon-carbon double bond.
B. They can form long chains of polymers.
C. They react with hydrogen and form alkanes.
D. They are obtained by cracking petroleum.
A. They contain a carbon-carbon double bond.
The correct name of a compound with the formula (NH4)3N
Ammonium nitride
velocity divided by acceleration is equal to
Time
calculate the percent composition of Oxygen in Sulfate.
Sulfur=32.07x1=32.07
Oxygen=16 x 4=64g/mol
Round off 2 decimal places.
66.62%
In finding the molar mass of a compound, which of the following must be done first?
A. Add all the values to get the molar mass.
B. Determine the molecular formula of a molecule or a compound.
C. Use the Periodic Table of Elements to determine the atomic mass of each element.
D. Multiply the number of atoms for each element with the atomic mass.
B. Determine the molecular formula of a molecule or a compound.
How many carbon atoms are present in 2-methylpentane?
6
six
The formula of ammonium fluoride
NH4F
The path of object in projectile motion
trajectory
calculate for the molar mass of Penthane
72.15 g/mol
Which of the following best describes covalent bonding?
A. Bonding that involves transfer of electrons
B. Bonding that involves transfer of atoms
C. Bonding that involves sharing of electrons
D. Bonding that involves sharing of atoms
C. Bonding that involves sharing of electrons
An object accelerates from rest to increase its velocity to 120 m/s in 55 s. What is the object’s acceleration?
a=2.18m/s2
characteristic of metals enable them to be stretched into thin wires without breaking
Ductile
an object having constant velocity have __________acceleration
zero
0m/s
solve for the molecular formula of 2-methylbutanoic acid
C4H9(COOH)
or C5H10O2
Sodium chloride, also known as table salt, are commonly seen in small crystals. Which characteristic of ionic compound can be inferred from this? Ionic compounds are ___________.
A. small B. brittle
C. high boiling point D. insoluble in water
B. brittle
The difference between 1-dimensional motion and 2-dimensional motion
2-dimensional motion have both horizontal and vertical components