During a chemical reaction substances called reactants During a chemical reaction substance called reactants are combined to form a new substance called products which of the following are currently describes reactions and products of a chemical reaction

Answers

Answer 1

Answer:

Answer:

During a chemical reaction, substance called reactants are combined to form a new substance called products.

this sentence describes reaction and products of a chemical reaction

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Repulsion is a force or interaction among the atoms in a molecule in which the atoms attract one another. a. True
b. False

Answers

Repulsion is a force or interaction among the atoms in a molecule in which the atoms REPEL one another. By the word itself repulsion, meaning to repel, it automatically bans the idea of ATTRACTION. Therefore, the statement above is FALSE. The answer to this question is "B. False".

The metalloid that has three valence electrons is?

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The metalloid that has three valence electrons is Boron~

Answer:

The metalloid that has three valence electrons is Boron~

Explanation:

Is rubber band stretching physical or chemical

Answers

Answer:

$\boxed {\boxed {\sf Physical \ change}}$

Explanation:

A chemical change, as the name suggests, must result from a change in the chemical makeup and new substances are produced. A very common example is metal rusting.

A physical change can be observed without a change in chemical composition. No new substances are produces. Ripping paper and an ice cube melting are physical changes.

A rubber band stretching is a physical change. No new substances are made and the chemical makeup remains the same.

Answer:

physical

Explanation:

this is a physical action to create a change. does not involve chemicals or elements

The diagram shows an animal cell.Which letter marks the location where carbon dioxide is
produced during respiration?

W
X
Y
Z

Answers

Answer:

Explanation:

Letter X is mitochondria. The mitochondria produces carbon dioxide, water, and ATP energy during cellular respiration.

A rock has 12.5 percent of its original amount of potassium-40 remaining in it; potassium-40 has a half-life of 1.25 billion years. How long ago was the rock formed?a) 1.25 billion years ago

b) 2.5 billion years ago

c) 3.75 billion years ago

d) 5 billion years ago

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A rock has 12.5 percent of its original amount of potassium-40 remaining in it; potassium-40 has a half-life of 1.25 billion years. 3.75 billion years ago was the rock formed. the answer is letter C

Answer:

the answer is b) 2.5 billion years. if its half life is 1.25 billion years and there is only 25% of the element remaining, you would take 1.25 billion and multiply it by two to get 2.5 billion.

Which of the following is the smallest volume? (2 points) 2500 mL 250 cm3
2.5 x 10-2 L
25 m3

Answers

So to put them all in the same units we have
2500 mL
250 mL
25mL
2,500,000,000mL

So the third one is the smallest

The third is the answer becuase you multiply

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Which of the following summarizes photosynthesis?A. glucose + carbon dioxide → oxygen + waterB. carbon dioxide + water → glucose + oxygen + waterC. oxygen + water → glucose + carbon dioxide + waterD. carbon dioxide + oxygen → glucose + oxygen + water