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3 years ago

What five elements make up 99% of living things

Chemistry

1 answer:

MA_775_DIABLO [31]3 years ago

4 0

Answer:

oxygen, carbon, hydrogen, nitrogen, and sulfur

Explanation:

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Rank the bonds from highest polarity to lowest polarity. (Highest on top)

Bogdan [553]

Answer:

O-H

N-H

Br-H

C-H

Si-H

Explanation:

Oxygen having electronegativity of 3.44 eV while hydrogen having electronegativity 22.2 eV. So oxygen will attract electrons more strongly than hydrogen because of higher electronegativity and produce a dipole. the electronegativity difference between them is 1.24eV which means it is polar compounds because if the electronegativity difference between bonded molecules are 0.4-2.0 eV indicated the compounds is polar. And same rule apply for rest of the options.

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3 years ago

Meredith mixes together 5 grams of baking soda and 5 grams of vinegar in a test tube that is not sealed. She then weighs the pro

MrMuchimi

Answer:

simple chemistry experiment—adding baking soda to vinegar—seems to challenge the law of conservation of mass.

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3 years ago

If air resistance is negligible, the sum total of potential and kinetic energies of a freely falling body _______

dybincka [34]

Answer:

Mechanical energy

Explanation:

Given that,

Potential energy of an object is given by :

P = mgh

The kinetic energy of an object is given by :

$K=\dfrac{1}{2}mv^2$

Where

m is mass

h is height

v is velocity of the object

The sum of potential and kinetic energy is equal to total energy or the mechanical energy.

Hence, if air resistance is negligible, the sum total of potential and kinetic energies of a freely falling body is equal to mechanical energy.

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3 years ago

Explain in steps how to find volume of a rock that is not rectangular water displacement

marissa [1.9K]

But bsjsjsksjsjshsjhdd

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3 years ago

Page : Date: What do you mean by a symbol ? What are the bases of making symbols?

xxTIMURxx [149]

Answer:

Hi, There! your Answers are Below And Are 100% Correct

Symbols are the basis of culture. A symbol is an object, word, or action that stands for something else with no natural relationship that is culturally defined

Explanation: The Answer to your Other Question Is In the Pic :)

(Dont forget to mark thanks)

8 0

3 years ago