How many formula units that are in 1.75 mole of
NaCl

10.54 ×10²³ formula units

Explanation:

Given data:

Moles of NaCl = 1.75 mol

Number of formula units = ?

Solution:

1 mole = 6.022×10²³ formula units

1.75 mol × 6.022×10²³ formula units/ 1mol

10.54 ×10²³ formula units

The number 6.022 × 10²³ is called Avogadro number. It is the number of atoms , ions ,molecules or formula units in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

answer: option (4) is the correct answer.

explanation:

areas which are at low altitudes and near the equator tend to receive direct sunlight from the sun. hence, heat energy or radiations from the sun make these areas warmer and they have warmest water.

whereas areas which are at high altitudes and away from the equator do no receive direct sunlight. hence, no direct contact from the sun makes these regions colder and thus, they have colder water.

thus, we can conclude that the statement areas at low latitudes near the equator have the warmest water because they receive the most direct sunlight best explains the relationship between an area's geography and the temperature of its surface water.

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.