Three quarters of the elements are

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Answer 1

Answer:

Metals

Explanation:

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Trejo reacts 5.0 moles of hydrochloric acid (HCI) with 1.5 moles of barium hydroxide (Ba(OH)2). Which reagent is the limiting reagent and which is in excess?

Answers

the balanced equation for the above reaction is as follows
Ba(OH)₂ + 2HCl ----> BaCl₂ + 2H₂O
stoichiometry of Ba(OH)₂ to HCl is 1:2
number of Ba(OH)₂ moles - 1.5 mol
number of HCl moles - 5.0 mol
limiting reactant is fully consumed during the reaction and amount of product formed depends on amount of limiting reactant present
excess reactant only a fraction of the amount present is used up in the reaction
if Ba(OH)₂ is the limiting reactant
if 1 mol of Ba(OH)₂ reacts with 2 mol of HCl
then 1.5 mol of Ba(OH)₂ reacts with 2 x 1.5 = 3.0 mol of HCl
but 5.0 mol of HCl is present and only 3.0 mol is required
therefore excess reagent is HCl and limiting reactant is Ba(OH)₂

The unstable nucleus that breaks apart is called ____A) Daughter Nucleus
B) Parent Nucleus
C) Beta Particle
D) Alpha Particle

Answers

The answer is B) parent nucleus

Why do we put these three words together in the 'fire triangle'?

Answers

the three word of this is to represent what it takes to create and maintain a fire

A commercial airplane typically flies at a height of 37,000 feet. If an average cell phone was dropped from an airplane, about how many seconds would it take to reach the ground? Round to the nearest whole number.

Answers

Well depends on how much the phone weighs but I’m sure it’s going off 1 lb so 1000 feet a second so your answer should be 37 seconds

Final answer:

If an average cell phone is dropped from a typical cruising altitude of an airplane, neglecting air resistance, it would take about 107 seconds to reach the ground.

Explanation:

The subject this question falls under is physics because it involves the physical principles of gravity and free fall. If we ignore air resistance (a common simplification in basic physics problems), we can solve this problem by employing the equation for the time (t) of a free-falling object:

t = √(2h/g),

where h is the height the object falls from and g is acceleration due to gravity (about 9.8 m/ $s^(2)$ ).

Notice that we would need to first convert 37,000 feet to meters (about 11,277.6).

By substituting these values into our formula, we get a value that indicates that a phone falling from the typical cruising altitude of an airplane would take about 107 seconds to hit the ground.

Learn more about Free fall time calculation here:

brainly.com/question/33015658

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What is the result of friction

Answers

A result of friction is heat. Anytime friction occurs between two pieces of matter, some sort of heat is cretated. Rub your hands together with force, and you will notice that they become warm. This is because the kinetic energy of the moving mass is not lost when the object slows down due to friction. Instead, it is converted to heat.

Another result can be the creation of a charge of static electricity. For example rubbing a glass rod with a silk cloth will do this.

They dump large amounts of rainwater that causes flooding.Tsunamis
Hurricanes
Earthquakes
Weathering

Answers

B hurricane I got it right

the answer is b. hope this helped :)

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What is the first element on the periodic table?