3 years ago

How can you use litmus paper to distinguish an acid from a base?

1 answer:

7 0

Hello! When litmus paper is placed in an acid, it usually turns red. When it is placed in a base, it turns dark-purple. Hope this helps! :)

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The beginning of the Phanerozoic is marked by what occurrence

Sergio039 [100]

The beginning of the Phanerozoic is marked by the development of hard body parts, such as shells and bones.

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4 years ago

A trough is filled with a liquid of density 860 kg/m3. The ends of the trough are equilateral triangles with sides 14 m long and

7nadin3 [17]

Answer:

2.89 x 10^6 N

Explanation:

The explanation is shown in the picture attached

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3 years ago

Hee Sun drew an electron dot diagram of a silicon atom as shown. In addition to changing the symbol to C, how would this diagram

dolphi86 [110]

Other than for the chemical symbol, the electron dot diagram for silicon would be the same as it was for carbon.

The reason for this is because electron dot diagrams are used to represent the electrons in the outermost, or valence, shell of an atom. In a group of the periodic table, all of the elements have the same number of valence shell electrons. This means that all elements belonging to the same group have the same electron dot diagram, except for the symbol of the element that is within the diagram.

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3 years ago

17.

Oliga [24]

I think potential but im not sure

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2 years ago

20. Wile E. pushes a 76-kg boulder off of the 90-m cliff in an attempt to hit the Roadrunner. What will the kinetic energy of th

KIM [24]

Answer:

67,032 J

Explanation:

According to the law of conservation of energy, the kinetic energy of the boulder just before hitting the Roadrunner (at ground level) will be equal to the gravitational potential energy of the boulder at the top of the cliff, therefore:

$K=U=mgh$

where

m is the mass of the boulder

g is the acceleration of gravity

h is the height of the cliff

Here we have

m = 76 kg

g = 9.8 m/s^2

h = 90 m

Substituting,

$U=(76)(9.8)(90)=67,032 J$

6 0

3 years ago