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3 years ago

An insulator,

1 answer:

8 0

Hey there !

The answer would be C. Is when electrons cannot nice through objects easily.

Any material that keeps energy such as electricity, heat, or cold from easily transferring through is an insulator. Wood, plastic, rubber, and glass are good insulators.

Hope this helps !

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Which statement about a reaction is not correct?

Vikki [24]

Answer:

Explanation:

A reaction that is exothermic and causes a decrease in the entropy of the system cannot be a spontaneous reaction. This is not totally true because naturally For a spontaneous process, the entropy of the universe (system plus surroundings) must increase. This is the 2nd law of thermodynamics. The system entropy can decrease as long as the entropy of the surroundings increases enough to make the sum of the system and surroundings positive.

And we know that a spontaneous reaction is a reaction that occurs in a given set of conditions without intervention. Spontaneous reactions are accompanied by an increase in overall entropy or disorder. If the Gibbs Free Energy is negative, then the reaction is spontaneous, and if it is positive, then it is nonspontaneous.

5 0

3 years ago

calcium and strontium are close to one another on thw oeriodic table. what do you know about their ionization energies ,their el

Firdavs [7]

Both Ca and Sr are in Group 2 of the Periodic Table, with Sr below Ca (see image)..

Ionization energies

They are both metals, so they have relatively low ionization energies.

Sr is below Ca in the Group, so Sr has the lower ionization energy.

Electron configurations

Their electron configurations both end in ns².

For example, the electron configuration of Ca is [Kr]4s² and that of Sr is [Kr]5s².

Physical chsrscteristics:

metallic lustre
malleable
ductile
good conductors of heat and electricity

Chemical characteristics

Both metals react with

• Hydrogen to form hydrides: M + H₂ ⟶ MH₂

• Oxygen to form oxides: 2M + O₂ ⟶ 2MO

• Nitrogen to form nitrides: 3M + N₂ ⟶ M₃N₂

• Halogens to form halides: M + X₂ ⟶ MX₂

• Water to displace hydrogen: M + 2H₂O ⟶ M(OH)₂ + H₂

4 0

3 years ago

Why is peer review important when publishing experimental results? A. Peer review makes the experiment repeatable. B. Peer revie

MA_775_DIABLO [31]

The answer is D. At least that's what I think.

4 0

3 years ago

Read 2 more answers

Which of the following is an example of a neutralization reaction?

Anastasy [175]

HCl (aq) + NaOH (aq)→H2O (l) + NaCl (aq)
Acid reacts with base to give H2O and salt

8 0

3 years ago

SEP Analyze Data Look at the phase diagram. What is the state of matter for methanol at a temperature of −0.1°C and a pressure o

devlian [24]

If it’s a negative number and a positive it might be 1.4

8 0

2 years ago