Answer:
0.3M
Explanation:
Molarity of a solution is given by;
M=n/v
Where;
n= number of moles of solute = mass of solute / molar mass
v= volume of solution
n= mass of CaCl2 / molar mass of CaCl2
Mass of CaCl2 = 0.5
Molar mass of CaCl2 = 40 + (2×35.5)
= 111g/mol
n = 0.5/111 = 0.0045mol
volume, v= 15mL = 15/1000 L = 0.015L
Note that molarity is in mole per liter, hence we convert 15mL to L. 1mL=1/1000L
M =0.0045/0.015
M=0.3mol/L
Therefore, the molarity of the solution is 0.3M
swinging back and forth.
Mechanical
Radiant (light)
Thermal (heat)
All of the above
6.What type of energy is being used in the following example?
They sat on the swings for a while, and also talked.
Electrical
Radiant (light)
Sound
Chemical
7.What type of energy is being used in the following example?
After a while, they decided to listen to some music on their portable radio.
Sound
Electrical
Chemical
All of the above
8.What type of energy is being used in the following example?
Soon realized that their batteries were low.
Mechanical
Radiant (light)
Thermal (heat)
Chemical
9.What type of energy is being used in the following example?
They saw lightning in the distance.
Electrical
Gravitational
Thermal (heat)
Chemical
10.What type of energy is being used in the following example?
They rode home and listened to the stereo at Jamie's house.
Radiant (light)
Sound
Thermal (heat)
Chemical
B. the number of neutrons
C. the number of electrons
D. the total number of protons and neutrons
The number of protons
for all atoms of mercury will remain the same while different isotopes may have different number of neutrons.
Explanation:
Atoms should have equal numbers of protons and electrons. In our example, an atom of thirty six|chemical element, it should contain thirty six electrons since it contains 36 protons. Electrons are organized around atoms in a very special method.
3. Why are there gaps in concrete roads?
a)to allow for contraction
b)cheaper
c)to allow for expansion
d)it makes it easier to repair one section of the road
2 b
3 d
you are welcome for that
carbon + oxygen + carbon dioxide
OB. carbon + oxygen - carbon dioxide
C.
carbon dioxide - carbon + oxygen
O D.
carbon dioxide + carbon - oxygen
Answer:
od
Explanation:
when burning a chemical compound the lighter element seperates from the stronger one
Answer: D) carbon dioxide + carbon - oxygen
Explanation: In the gas phase, carbon dioxide molecules undergo significant vibrational motions and do not keep a fixed structure. However, in a Coulomb explosion imaging experiment, an instantaneous image of the molecular structure can be deduced. Such an experiment has been performed for carbon dioxide. The result of this experiment, and the conclusion of theoretical calculations based on an ab initio potential energy surface of the molecule, is that none of the molecules in the gas phase are ever exactly linear. This counter-intuitive result is trivially due to the fact that the nuclear motion volume element vanishes for linear geometries. This is so for all molecules (except diatomics!).
Answer:
the more heat the more particle movement i dont think mass has any thing to do with it
Explanation: