A student is given two mineral samples that appear very similar. They both are opaque, white, and shiny. He knows that they are either calcite or quartz. To determine the identity of each mineral, the student puts a couple of drops of hydrochloric acid (HCl) on each sample. When calcite reacts with hydrochloric acid, carbon dioxide gas is produced. When HCl is placed on quartz, no changes are observed. Based on the information above, what evidence indicates that a chemical reaction occurs when HCl is placed on calcite?

Answers

Answer 1

Answer:

Carbon dioxide is a new product formed from the reaction between calcite and HCl

Explanation:

Calcite is a mineral with the chemical formula CaCO₃. Hydrochloric acid reacts with calcite to liberate carbon dioxide and form calcium chloride and water. The equation of the reaction is given below:

CaCO₃ + HCl ----> CaCl₂ + H₂O + CO₂

In a chemical reaction or change, new products are formed which are different from the original elements or compounds reacting.

Since the carbon dioxide gas, calcium chloride and water are entirely new products formed from calcite and hydrochloric acid, the reaction between calcite and HCl is a chemical reaction.

Answer 2

Answer:A

Explanation:

Carbon dioxide is a new substance created from the calcite and hydrochloric acid


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Why do you think some methods for taking a patient’s temperature are more accurate than others?

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Answer:

because it gives you the best results

Explanation:

i have to get rid of my dog i was wondory if someone is instrasted
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Answer:

bad effect to the central nervous system

Explanation:

What system is responsible for bringing in starch and protein?

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Pancreatic Amylase should be the correct answer

The graph shows the diabetes and obesity trends in the United States.

A graph titled Diabetes and Obesity Growth Trend in the U.S shows years on the horizontal axis and percentage on the vertical axis. The graph shows an upward trend for both percentage of the population with obesity and percentage of the population with diabetes.

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Both are increasing.
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Answers

Answer:

both are increasing forsure

Answer:

a

Explanation:

because i said so brudda

How are your relationships with family members similar to your relationships with friends and how are they different?

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What is the difference between prescription medicines, nonprescription medicines, and illegal substances. What is their abuse?

Answers

Answer:

Prescription drugs are prescribed by a doctor and intended to be used by a specific person that the prescription is for, while over-the-counter drugs are not. The FDA regulates the OTC drugs through monographs. Monographs cover acceptable ingredients, doses, formulations, and labeling.

100% on edge:)

Explanation:

Answer:

Prescription drugs are prescribed by a doctor and intended to be used by a specific person that the prescription is for, while over-the-counter drugs are not. The FDA regulates the OTC drugs through monographs. Monographs cover acceptable ingredients, doses, formulations, and labeling.

Explanation:

Question 12 pts
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Group of answer choices

Protein and Dairy

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Grains (Carbohydrates) and Dairy

Protein and Vegetables

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Question 22 pts
How many servings of fruits should you consume daily?

Group of answer choices

2-3

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Question 32 pts
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Group of answer choices

Dairy

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Question 42 pts
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Group of answer choices

Protein

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Question 52 pts
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Group of answer choices

Protein, Fat, and Carbohydrates

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Question 62 pts
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Group of answer choices

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Group of answer choices

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Question 82 pts
Use the Nutrition Label below to answer the next 3 questions.

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Nutrition Label
Minimize File Preview


Group of answer choices

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Question 92 pts
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Group of answer choices

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Question 102 pts
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This mineral helps to increase one strength, improve transmission of nerve signals, and help muscle contraction and relaxation.

Group of answer choices

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Group of answer choices

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Group of answer choices

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Group of answer choices

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Group of answer choices

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Group of answer choices

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Group of answer choices

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Question 202 pts
Which nutrient makes up approximately 16% of our body weight and is made up of different amino acids?

Group of answer choices

Fat

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Answers

Answer:

Fruits and vegetables

Explanation:

Because you have to stay heath to have a good hygene

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Answers

Answer:

D. The guidelines are not meant for weight loss

Explanation:

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Hope this helps!

Answer:

Explanation:

The guidelines have changed since 2006

How can a person demonstrate
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Answers

Answer:

Hi! itz Zack! ^^

Explanation:

The first way involves the appearance of a feeling of stress in response to the fear or anxiety of another person. The second way to demonstrate affective empathy is to mirror the other person’s emotion back to them. From a less technical standpoint, empathy is simply the ability to understand another person’s point of view.

hope this helps!!

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Answers

Answer:

Examples include silent point mutations. They are neutral because they do not change the amino acids in the proteins they encode.

Mark Me As Brainliest If u Found this answer helpful....

Examples include silent point mutations. They are neutral because they do not change the amino acids in the proteins they encode.

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B.
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C.
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D.
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Answers

B.
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Answer:

A

Explanation:

because its good for you

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Answers

Answer:

Have hope

Explanation:

If you're a firm believer in a god, you'll know that everything happens for a reason

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Answers

I think answer should be c. Please give me brainlest let me know if correct or not thanks I appreciate it bye

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Answer:

Ballistic

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Answers

Answer:

true

Explanation:

the nucleus is the control center of a cell which is also called the brain of a cell

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True






I hope my answer helped you!

Characteristics in common with both smooth and cardiac muscles

Answers

Explanation:

what's the question I dunno it

Answer:

Cardiac and skeletal muscle are both striated in appearance, while smooth muscle is not. Both cardiac and smooth muscle are involuntary while skeletal muscle is voluntary. ... Cardiac muscle is also an involuntary muscle but is more akin in structure to skeletal muscle, and is found only in the heart.

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Answers

1 early drug use causes addiction

The single factor that predicts whether or not a person will develop addiction is "None of the above".

Addiction refers to a situation whereby someone cannot stop using a particular substance. It's a chronic disease that is difficult to control, and has a harmful consequence.

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It should be noted that the more risk factors that an individual has, the more the chance that engaging in harmful substance will lead to addiction.

Therefore, there is no single factor that predicts whether or not a person will develop addiction.

The correct option is "None of the above".

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Which is a source of water pollution?
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C.
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Answers

Answer:

C

Explanation:

Thw waterways would be clogged, which causes water pollution.

The source of water pollution is:

C. sediment from land erosion that clogs waterways

Causes of water pollution:

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Thus, option C is correct.

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does a panda have a Endocrine system

Answers

Answer:

Yes

Explanation:

trust me i love pandas

Choose one of the following natural disasters. You may choose one that might occur in your community. Then, using the three parts of an emergency preparedness plan, describe what your family would do during that natural disaster. Wildfire Earthquake Blizzard Hurricane

Answers

Answer:

wildfire: 1.if you cant put out the fire try and barracade the fire to try and stop  it from spreading 2. step away from the fire about 5 feet away 3. call the fireman and tell your location

Explanation:

How dose someone acquire bipolar disorder/develop it ... what parts of the body are affected.

Answers

Answer:

the parts of body is so big big big agbibigbig

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Answers

Two types of UV rays reach the earth, UVA and UVB (the sun also emits UVC rays, but these are absorbed by the earth's atmosphere). UVA rays are the rays that cause tanning as well as wrinkles and other signs of premature aging, and UVB rays cause sunburns and skin cancer.

How does this level of organization relate to cells? To organ systems?

Answers

Answer:

The heart —belonging to the organ level of organization— is composed of cardiac muscle cells forming the myocardium, and belongs to the cardiovascular system.

Explanation:

The cellular level of organization of the heart is complex, since it is a group of specialized cells that constitute the main organ of the cardiovascular system.

The heart is predominantly made up of the myocardium, formed by muscle cells similar to those of the striated muscle, but with a different distribution. Other cells belonging to the heart are the endothelial cells, which cover its interior, and the fibrous and serous cells that constitute the pericardium.

Structurally, the heart is part of the cardiovascular system, whose function is to carry blood throughout the body. Functionally, this organ is related to all the tissues, organs and systems of the body.

The__________is a thick band of axon fibers that connects the two hemispheres of the brain

cerebrum
cerebral cortex
longitudinal fissure
corpus callosum

Answers

Answer:

D

Explanation:

Answer:

D) corpus callosum

Explanation:

edge 2023

Which one of the following people has the most direct and most cost-effective opportunity to avoid developing disease or injury?

Answers

Answer:

The correct answer would be B. Juan

Juan is depressed because his father has passed away. This is an understandable reaction as he is grieving. This isn't something that is a daily or normal circumstance in his life though and he does have the opportunity and ability to recover and heal emotionally especially with the right support.

Cathy is addicted to cigarettes which already puts her at high risk of developing health problems. All her friends smoke which adds on additional peer pressure and negative environment making it difficult for her to quit. Smoking is also an expensive habit.

Meryl has diabetes which she seems to have inherited. She is at a high risk of developing complications resulting from her diabetes and medical treatment for her diabetes alone is expensive.

Paul is being exposed on a daily basis to polluted air. The only thing he could do about that would be to move but that is expensive. He can't do anything about the coal plant or the pollution and he is at high risk of developing respiratory problems.  

Explanation:

not my answer

Sorry im just tryna get points my bad

n
The alarm stage of Hans Selye's general adaptation syndrome is very similar to
A. the flight-or-fight response
B. constructive coping
C. catharsis
D. appraisal

Answers

Answer:

the flight or fight response

Explanation:

got it correct on edg, 100%

The alarm stage of Hans Selye's general adaptation syndrome is very similar to the flight-or-fight response, hence option A is correct.

What is the flight-or-fight response?

The fight or flight response is a physiological response that occurs automatically in response to a stressful or frightful experience.

Threat perception engages the sympathetic nervous system, causing an acute stress reaction that primes the body for either fighting or running away.

Because your blood flow is being changed, you can feel chilled or notice that your hands and feet are damp and cold.

As your body's blood and hormones flow, your face could also seem flushed. The ability to feel sharp pain is impaired.

Therefore,  the flight-or-fight response and alarm stage of Hans Selye's general adaptation syndrome is similar.

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If you want to make healthy choices, you need to A. learn about your body B. discuss your health with a doctor C. have a medical examination​

Answers

Answer:

I am 99% sure the answer is A-learn about your body

Explanation:

I hope this helps, can i plz have brainliest

PLEASE HELP NOW!! ASAP!!

This source of stress is caused by changes in your life.

A. personal behavior

B. life situations

C. thinking stressors

D. environment stressors

Answers

Answer:

b

Explanation:

The source of stress which is caused by the changes in the life is the life situations. Thus, the correct option is B.

What is Stress?

Stress can be defined as the state of worry or mental tension which is caused by a difficult situation. Stress is a natural human response which prompts us to address the challenges and threats in our lives. Everyone experiences the stress to some or other degree in life.

Stress is a feeling of emotional or physical tension. Stress can come from any event in life or thought which makes a person feel frustrated, angry, or nervous. Stress is the body's reaction to a challenge or demand. In short bursts, the stress can be positive, such as when it helps a person to avoid the danger or meet a deadline.

Therefore, the correct option is B.

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