Answer:
The mass of the block made of lead = 255.6 grams
Explanation:
<u>Step 1</u>: Data given
Density of lead = 11.36 g/cm³
length of the block = 5 cm, 1.5 cm and 3 cm
<u>Step 2</u>: Calculate the volume of the block
Volume = length 1 * length 2 * length 3
Volume = 5cm * 1.5 cm * 3 cm
Volume = 22.5 cm³
<u>Step 3</u>: Calculate mass
Mass of the lead block = density of lead * volume
Mass of the lead block = 11.36 g/cm³ * 22.5cm³
Mass of the lead block = 255.6 grams
The mass of the block made of lead = 255.6 grams
Answer:
Color-Color in minerals is caused by the absorption, or lack of absorption, of various wavelengths of light. The color of light is determined by its wavelength. ... Some elements have electrons that absorb certain wavelengths or colors.
Streak-The streak of a mineral is the color of the powder produced when it is dragged across an un-weathered surface. ... Small amounts of an impurity that strongly absorbs a particular wavelength can radically change the wavelengths of light that are reflected by the specimen, and thus change the apparent color.
Hardness-The hardness of minerals is diagnostic because the hardness is determined by the strength of bonds and the structure of the mineral lattice. Hardness is basically the stress required to create and grow extended lattice defects such as micro-fractures, stress twins, and dislocations.
Cleavage-The tendency of a mineral to break along flat planar surfaces as determined by the structure of its crystal lattice. These two-dimensional surfaces are known as cleavage planes and are caused by the alignment of weaker bonds between atoms in the crystal lattice.
The melting point of ice is 0 degrees Celcius, which means it exists as a liquid for any temperatures above 0 degrees. The melting point of salt is approximately 800 degrees Celcius, which is way greater than the melting point of ice. This means that for temperatures below 800 degrees, salt exists as a solid.
The temperature of the area where they were placed we can assume was somewhere between 0 and 800 degrees, greater than the melting point of ice but less than the melting point of salt. This why the ice melted but the salt did not.
I hope this helps!
Hello,
<span>the gas phase is [Ar] 3d^5 4s^2 and since there are five 3d AOs the atom has five unpaired e⁻: (↑)(↑)(↑)(↑)(↑) (Hund's rule)</span>
