CHEMISTRY HIGH SCHOOL

A substance whose shape can easily change is aa. solid.
b. powder.
c. fluid.
d. metal.

Answers

Answer 1
Answer:

Answer:

The correct answer is the option:

c. fluid.

Explanation:

Hello!

Let's solve this!

A substance that can change its shape quickly is a fluid. Fluids have the property of adapting to the shape of the container that contains them. So you can easily change shape.

After the explanation, we conclude that the correct answer is the option:

c. fluid.
Answer 2
Answer: c. fluid
Fluids, like water for example, can quickly change shape and conform to their surroundings.

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A catalyst works by(1) increasing the potential energy of the reactants(2) increasing the energy released during a reaction(3) decreasing the potential energy of the products(4) decreasing the activation energy required for a reaction

Answers

Answer: Option (4) is the correct answer.

Explanation:

Activation energy is the minimum amount of energy required by reactant molecules to undergo a chemical reaction.

Whereas a catalyst is defined as the substance that helps in increasing the rate of reaction by decreasing the activation energy without itself getting consumed in the reaction.

When a catalyst decreases the activation energy then molecules with lesser energy become able to participate in the reaction and thus, products are obtained at a faster rate. Hence, a catalyst increases the rate of a reaction.

Thus, we can conclude that a catalyst works by decreasing the activation energy required for a reaction.
The catalyst (4) decreases the activation energy required for a reaction, by holding reactants in place

How many days are really in a year

Answers

Its actually 356 and 1/4 days. thats why we have leap year!
Day of year is a number between 1 and 365 (January 1 is day 1).

Oxidation numbers are written as ____.

Answers

they are written as superscripts
(a symbol or a figure)

What is the best description of the Bohr model of the atom?A.)The atom consists of a positively charged material with negatively charged electrons embedded within it.
B.)The atom consists of a nucleus with electrons orbiting randomly around it.
C.)The atom consists of a nucleus with electrons orbiting at specific energy levels. Absorbed photons cause electrons to jump between energy levels.
D.)The atom consists of a nucleus surrounded by a region containing electrons. Electrons cannot be located exactly within this region, but the probability that they will be found in an area can be stated.

Answers

The best description of the Bohr model of the atom is that the atom consists of a nucleus with electrons orbiting at specific energy levels. Absorbed photons cause electrons to jump between energy levels. The answer is letter C.

What is the ph of 1.2 time 10 to the negitive 2

Answers

Answer:

Explanation:

H⁺  = 1.2 x 10⁻²

pH = - log[H⁺]

= - log [ 1.2 x 10⁻²]

= - log1.2  + 2

= - .079 + 2

= 1.921 .

Which question would most likely be studied by a physicist?A. Were there ever any living organisms on Mars?
B. How can the forces on a space probe be controlled so it will land
on Mars?
O C. What type of substances make up the soil on Mars?
O D. Should the government spend taxpayers' money to send space
probes to Mars?

Answers

Answer:A

Explanation: Were there any living organisms is the answer because physics is the study of matter,its motion and behaviour of space and time and some other topics like energy and force.

Answer:

B

Explanation:

Forces and vectors on a probe are a physics thing
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