The density of a liquid is the ratio of its mass to its volume. It is an extensive property even though mass and volume are both intensive properties. At a certain temperature and pressure, the density of a liquid is constant. The solution is as follows:
Density = Mass of liquid/Volume of liquid
Mass of liquid = Mass of liquid and cylinder - Mass of cylinder
Mass of liquid = 12 g - 10.8 g = 1.2 g
Density = 1.2 g/7.4 mL
Density = 0.162 g/mL
The flame test is commonly used to identify different metal ions by how they get excited in the presence of a flame.
Typically a nichrome wire is dipped in a solution of metal cations and then presented to a flame. The flame emits a different color than normal, depending on the type of metal cation. Each metal ion gets excited by the flame and as the electrons change energy levels they emit a photon of light, thus changing the color. Since each metal cation has unique energy levels, the colors differ depend on the metal cation.
I hope this helps.
Answer:
umm well when a reaction happens it's chemical and when you put like salt and pepper or cookies and crackers its physical
Explanation:
Answer: 0.087 grams will produce 1620.J of heat.
Explanation:
Amount of heat released when 1 gram of reactant is consumed= 18.5 kJ = 18500 J (1kJ=1000J)
According to avogadro's law, 1 mole of every substance occupies 22.4 L at NTP, weighs equal to the molecular mass and contains avogadro's number of particles.
Thus we can say:
18500 J is released by consumption of reactant = 1 gram
Thus 1620 J is released by consumption of reactant =
Thus mass of reactant that will produce 1620 J of heat is 0.087 grams
It is a principle that states that mass cannot be loss or gained in a chemical reaction.