General Science
What's found in the nucleus of an atom?
Protons and Neutrons.
Two characteristics of life that viruses do.
Reproduce ( though not on their own) and evolve
How many significant figures are there in 0.0004568389
7
What is Avagadro's number?
6.022 x 1023
What is the difference between a Meteor and a Meteorite?
Meteorites hit the ground, while Meteors burn in the atmosphere and turn into Meteorites.
What genetic disease is a result of having three copies of the 21st chromosome?
Down’s syndrome
What is the exponential factor for tera (T)?
1012
Explain the trend of Atomic Radii on the periodic table.
Atomic Radii increases down a group and decreases across a period.
How many atoms are there in Ca(NO3)2
9 atoms
What is a gap between one neuron and another called?
synapse
If you travel at speeds close to speed of light, compared with your friends on earth, you are
A.Older
b.Younger
C. no younger nor no older
D. Longer
Why?
Younger. Time dilation
Name 3 factors that affect solubility.
Temperature, Polarity, Pressure, Size, Agitation
What is the balanced equation for photosynthesis?
6CO2 + 6H20 -------> C6H12O6 + 6O2
light
Two proteins involved in muscle contraction
Actin and myosin
A tennis ball with mass 60 g travels horizontally with constant speed u. The ball hits a stationary racket and rebounds in the opposite direction with a horizontal speed v. The time for the collision is 5.0 ms.
What is the magnitude of the average force on the ball in terms of u and v?
12(u+v)
What are the 5 types of chemical reactions?
Synthesis rxn, Decomposition rxn, Single-Displacement rxn, Double-displacement rxn, and Combustion rxn.
In an experiment to find the value of x in the compound MgBr2.xH2O, 7.30 g of the compound on heating to constant
mass gave 4.60 g of the anhydrous salt MgBr2. Find the value of x.
MgBr2.xH2O → MgBr2 + x H2O
What are the 5 types of chemical reactions?
6
How many ATP molecules are formed as a result of oxidation of glucose in the presence of oxygen?
32- 38
A hypothetical planet, with a radius twice that of Earth, orbits the Sun at a distance twice that of the Earth's distance from the Sun. Determine the average intensity of solar radiation on the surface of the hypothetical planet in terms of the solar constant of the Earth, S.
S/16
When 1.02 g of steric acid, C18H36O2, has burned completely in a bomb calorimeter, the temperature of the calorimeter rose by 4.26 °C. The heat capacity of the calorimeter was 9.43 kJ/°C. Calculate the total heat of combustion of steric acid in kJ/mol.
Around 11206 kJ/mol.