CHEMISTRY HIGH SCHOOL

Each type of mineral has a chemical composition that isA. unique to that mineral
B. similar to other minerals
C. variable depending on where its found
D. influenced by heat and light

Answers

Answer 1
Answer: Answer: C. variable depending on where its found

The chemical compositions of minerals is very necessary in order to define or describe a certain mineral. Some minerals can be written in simple chemical formula while others are also written in complicated chemical formulas.

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An element, X, has 2 isotopes, X-32 with an abundance of 31.5% and X-35 with an abundanceof 68.5%. What is the average atomic mass of element X?
A gas changes directly to a solid during(1) fusion (3) saponification(2) deposition (4) decomposition
What kind of atmosphere does a gas giant have?
Katy works at a pet store, and is in charge of tracking the cat food supply for the morning, afternoon, and evening shifts. There are currently six cats at their store, and each cat had full food bowls during the morning and afternoon shifts, throughout the entire shift. Each day, the evening shift person replenished the food bowls at the end of their shift. What is the pattern Katy could note from this data?
List inconsistency of Dalton's atomic theory

Some scientific evidence suggests that our universe is ever-expanding from a hot and dense initial state. Briefly describe at least one piece of evidence that supports the theory known as the Big Bang.

Answers

cosmic microwave background radiation (CMBR) is one piece of evidence for the big bang

Answer:

Cosmic microwave background and Hubble's Law.

Explanation:

Microwave background is basically electromagnetic radiation, but it's the remanent from earlier periods of the universe, they are the oldest electromagnetic wave in the Universe. Also, Hubble's Law says that the Universe faster galaxies are those are further away, because they belong to the first period of the explosion.

Which words list the correct order of activated neurons in a reflex arc?

Answers

Here is the correct order of activated in a reflex arc.
(1) Receptor: where stimulus action is.
(2) Sensory Neuron: responisble of transmitting afferent impulses to the central nervous system.
(3) Integration Center: Sensory impulse to motor impulse; Direct (monosynaptic) or polysynaptic region in CNS.
(4) Motor Neuron: Efferent impulses from integration center to effector.
(5) Effector: Muscle fiber or gland cell that responds to the efferent impulses. 

Answer:

1. Receptor: where stimulus action is.

2. Sensory Neuron: responsible of transmitting afferent impulses to the central nervous system.

3. Integration Center: Sensory impulse to motor impulse; Direct (monosynaptic) or polysynaptic region in CNS.

4. Motor Neuron: Efferent impulses from integration center to effector.  

  5. Effector: Muscle fiber or gland cell that responds to the efferent impulses.

B. receptor, sensory, interneuron, motor, effector

What is special about nitrogen?
and what is it main function?

Answers

Nitrogen is present in many spheres of the Earth, including the atmosphere and biosphere. Nitrogen makes up around 80% of the atmosphere (more than oxygen), and exists as a diatomic molecule.  it's also essential in the function of plants, as the most commonly used mineral nutrient. It is also used in photosynthesis and is a major component of amino acids which make protein. 

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

An element's atomic number is 63. How many protons would an atom of this element have?

Answers

Atomic number of an element correlates to the number of protons an atom of that element will have. An atom of this element would have 63 protons.

Sarah is testing how quickly saltwater freezes. She adds saltwater to one ice tray and plain water to another ice tray. She places each tray in the freezer and records the time when each one starts to freeze. What treament did she do?. . A.Salt. B.Water. C.Freezer. D.Ice tray

Answers

The correct answer is A. Salt

That is because all of the conditions and the ingredients are the same. The one thing that makes the difference is the salt, which if removed, would cause everything to be the same. If she knows at how much regular water freezes, she can easily see how salt impacted the difference.

Answer:

salt

Explanation:
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