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3 years ago

Pick three properties of water that you think are the most important for life to exist.

Chemistry

1 answer:

dangina [55]3 years ago

6 0

Answer:

Water's unique density, high specific heat, cohesion, adhesion, and solvent abilities allow it to support life.

Explanation:

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All molecules have the same kinetic energy and hence the same speed. O True O False

topjm [15]

False...their speed differs

4 0

2 years ago

A sample of a pure compound that weighs 60.3 g contains 20.7 g Sb (antimony) and 39.6 g F (fluorine). What is the percent compos

Volgvan

Answer:

The percent composition of fluorine is 65.67%

Explanation:

Percent Composition is a measure of the amount of mass an element occupies in a compound. It is measured in percentage of mass.

That is, the percentage composition is the percentage by mass of each of the elements present in a compound.

The calculation of the percentage composition of an element is made by:

$percent composition element A=\frac{total mass of element A}{mass of compound} *100$

In this case, the percent composition of fluorine is:

$percent composition of fluorine=\frac{39.6 g}{60.3 g} *100$

percent composition of fluorine= 65.67%

The percent composition of fluorine is 65.67%

4 0

3 years ago

Copper(II) sulfide is oxidized b molecular oxygen to produce gaseous sulfur trioxide and solid copper (II) oxide. The gaseous pr

Tasya [4]

Explanation:

Copper(II) sulfide reacts with oxygen gas to give solid copper(II) oxide and sulfur trioxide gas.

The reaction is given as:

$CuS+2O_2\rightarrow CuO(s)+SO_3(g)$

When 1 mol copper(II) sulfide react with 2 moles of oxygen gas it gives 1 mol of solid copper(II) oxide and 1 mol of sulfur trioxide gas

The gas formed in above reaction that is sulfur trioxide reacts with water to give sulfuric acid or hydrogen sulfate.

The reaction is given as:

$SO_3(g)+H_2O(l)\rightarrow H_2SO_4(aq)$

1 mol of sulfur trioxide gas reacts with 1 mol of liquid water to produce 1 molo of liquid hydrogen sulfate or sulfuric acid

3 0

3 years ago

atroni [7]

Answer:

(1) atomic numbers

Explanation:

The observed regularities in the properties of the elements on the periodic table are periodic functions of their atomic numbers.

Atomic number is the number of protons in an atom.
The periodic law states that "the properties of elements are a periodic function of their atomic number".
Elements on the periodic table are arranged based on the atomic numbers they contain.
The number of positively charged particles in an atom is the atomic number.

6 0

2 years ago

A change in velocity can occur without a change in speed * A: True B: False?

Mrrafil [7]

Answer: True

Explanation: For example, changing direction can change velocity

6 0

2 years ago

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