Mercury is often used in thermometers. The mercury sits in a bulb on the bottom of the thermometer and rises up a thin capillary tube as the temperature rises. Suppose a mercury thermometer contains 3.380g of mercury and has a capillary that is 0.200mm in diameter. How far does the mercury rise in the capillary when the temperature changes from 0.0 0C to 25.0 0C

3.5 cm

Explanation:

Mass of mercury = 3.380

Diameter = 0.200

At t = 0 and 25 degrees we have 13.596 and 13.543 as density

At 0 degree = v = 3.380/13.596 = 0.2485

At 25 degrees = 3.380/13.534 = 0.2497

We use volume of cylinder to get height

At 0⁰ height = 7.91

At 25⁰ = 7.944

The difference in height = 0.035

Multiply by 100 = 0.35 x100

= 3.5cm

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.