Explanation:
There are three states of matter:
1) Solid: In this state, the particles lie closer to each other. there is a strong intermolecular force of attraction between the particles.
2) Liquid: In this state, the particles are at a certain distance to each other. There is an intermediate intermolecular force of attraction between the particles.
3) Gas: In this state, the particles are farther from each other. There is weaker intermolecular force of attraction between the particles.
As the number of carbon atoms in a molecule increases, the number of particles increases and the particles will come closer to each other. Hence, the state of matter will shift towards the solid state.
Viscosity is defined as the tendency to resist the particles to flow. As, the number of carbon atoms increases, the Vander-Walls forces increases, the particles are closer to each other and Hence, the viscosity will increase.
Scandium forms one ion, Sc3+, with an electron configuration of 1s2 2s2 2p6 3s2 3p6
Answer:
Independent variables are ones that can be controlled and dependent variables are results of these changes. So, in question a, an independent variable is amount of a released energy, in these case in form of heat. We reduced that amount and as a result we get a dependent variable as high temperature of chocolate for longer time, so we changed time of a heat releasing from chocolate. In question b, an independent variable is temperature of water, and a dependent variable is amount of produced oxygen. In question c, an independent variable is an intensity of exercise. When we change the intensity of exercise, as a results, breathing rate is changed, which is dependent variable.
Explanation:
Answer:
Bond angle is defined as the angle between two or more bonds or bonded electron pairs in a compound.
Explanation:
a) O−O−O angle of O3 - <120°
b) F−B−F angle of BF3 - 120°
c) F−O−F angle of OF2 - <109.5
d) Cl−Be−Cl angle of BeCl2 - 180°
e) F−P−F angle of PF3 - 109.5°
f) Cl−Si−Cl angle of SiCl4 - 90°
Answer is: C. CaCl2.
Name of this chemical compounds is calcium chloride.
Calcium chloride is a inorganic salt with ionic bonds between calcium and chlorine.
It is a colorless crystalline solid at room temperature, highly soluble in water.
Calcium form cation with positive charge 2+ and chlorine form anion with negative charge 1-.
Electron configuration of calcium atom: ₂₀Ca 1s² 2s² 2p⁶ 3s² 3p⁶ 4s².
Atomic number of calcium is 20, it means that it has 20 protons and 20 electrons, so atom of calcium is neutral.
When calcium lost two electrons, it will have 20 protons (positive charge) and 18 electrons (negative charge), which means it has two protons more and it has +2 oxidation number.
