Answer: sun is directly over the equator
Explanation:
There are only two times of the year when the Earth's axis is tilted neither toward nor away from the sun, resulting in a "nearly" equal amount of daylight and darkness at all latitudes.
Answer:
79.8g/dm³
Explanation:
As you can see, the solution in the problem contains 0.5 moles of copper sulfate per dm³. To solve this question we must convert these moles to grams using its molar mass (Molar mass CuSO4 = 159.609g/mol) as follows:
0.5mol CuSO4/dm³ * (159.609g/mol) =
<h3>79.8g/dm³</h3>
It has bent geometry, which is similar to H2O, with the same angle of 109.5 degrees between 2 single H-S bonds.
Answer:
(a) a carbon–carbon triple bond is shorter than a carbon–carbon single bond.
The given statement is true.This because bond order in of (C-C) bond in triple bond is 3 whereas the bond order of (C-C) bond in single bond is 1. Higher the bond order shorter will be the bond length.
(b) There are exactly six bonding electrons in the oxygen molecule.
The given statement is false. This is because bond order present in oxygen molecule is 2 which means there are 4 bonding electrons in the oxygen molecule.
(c) the (C-O) bond in carbon monoxide is longer than the (C-O) bond in carbon dioxide.
The given statement is false.This because bond order in of (C-O) bond in CO is 3 whereas in 
the bond order of (C-O) bond is 2. Higher the bond order shorter will be the bond length.
(d) The (O-O) bond in ozone is shorter than the (O-O) bond in oxygen.
The given statement is false. This is because bond order in of (O-O) bond in ozone molecule is 1.5 whereas in 
the bond order of (O-O) bond is 2. Higher the bond order shorter will be the bond length.
(e) The more electro-negative the atom, the more bonds it makes to other atoms.
The given statement is false. This is because atom with more electro-negative character. Since, they are highly electron rich atoms so they will tend to form less number of bonds with other atom.
Answers are:
1) The metals were not heated to 100°C.
2) The metals cooled before they were added to the water.
3) The thermometer was not completely submerged in the water while reading.
4) The calorimeter was not sealed properly, so heat escaped.
First Law of Thermodynamics - any heat lost by the system must be absorbed by the surroundings.
-qsystem = qsurroundings.
Heat spontaneously flows from a hotter (in this example hot metal) to a colder body (in this example water).
Student did not have mistake in determining the specific heat of metals, because there is heat lost during experiment.
Heat capacity of a sample is expressed in units of thermal energy per degree temperature (J/K).
Heat capacity is often defined relative to a unit of mass (J/kg·K or J/g·K), prefixed with the term specific.
For example, specific heat capacity of water is 4.184 J/g·K (Cp(H₂O) = 4.184 J/g·K).
