Can someone help me please?

OlgaM077 [116]

Answer:

It's The amount of matter within the system remains the same and The cycle has a well-defined starting and stopping point.

Explanation:

7 0

3 years ago

___________ is the ability of an object to carry electricity.

Lelu [443]

Answer:

Electrical conductivity

Explanation:

note the words electrical and conductivity.

Electrical + conductivity = the ability of an object to carry electricity

Hope this helps!

3 0

3 years ago

Determine whether each chemical substance would remain the same color or turn pink in the presence of phenolphthalein.

Serhud [2]

Answer:

See the answer below

Explanation:

<em>The complete question can be seen in the attached image.</em>

<u>Phenolphthalein is an indicator that is often utilized in an acid-base reaction to indicate the endpoints of such reactions due to its ability to change color from pink/colorless to colorless/pink depending on if the final solution is acidic or basic.</u>

Phenolphthalein is usually colorless in acidic solutions and appears pink in basic solutions. The more basic or alkaline a solution is, the stronger the pink color of phenolphthalein. Hence;

1. Ammonia with a pH of 11 is basic, phenolphthalein will turn pink.

2. Battery acid with a pH of 1 is acidic, it will remain colorless.

3. Lime juice with a pH of 2 is acidic, it will remain colorless.

4. Mashed avocado with a pH of 6.5 is acidic, it will remain colorless.

5. Seawater with a pH of 8.5 is basic, it will turn pink.

6. Tap water with a pH of 7 is neutral, it will remain colorless

3 0

4 years ago

Cora, an electrician, wraps a copper wire with a thick plastic coating. What is she most likely trying to do? keep the electric

Alekssandra [29.7K]

Answer: keep a current from passing out of the wire

Explanation: plastic is an insulator and will not conduct electricity

3 0

4 years ago

Read 2 more answers

An ionic bond can be formed when one or more electrons are 1) equally shared by two atoms 2) unequally shared by two atoms 3) tr

Lyrx [107]

Answer:

4) transferred from the valence shell of one atom to the valence shell of another atom

Explanation:

Electrons are located outside of the nucleus which contains the protons and the neutrons.

For bonds to form, valence electrons located in the outermost shell electrons are involved. These are the valence electrons. These outer shell electrons can be shared or transferred between two combining atoms to form stable atoms.

In ionic bonds, the electrons are transferred from one specie to another. The atom that loses the electrons becomes positively charged and the receiving atom becomes negatively charged. This is the crux of ionic bonds.

6 0

3 years ago