Chemistry Middle School

TRUE OR FALSE

As the human population increases, demand for natural resources will also increase.

Answers

Answer 1

It’s true, as the human population grows, our consumption of natural recorded increases

Related Questions

Please help me por favor :'(

Answers

More volume, takes longer to heat all the molecules.

Use the chemical reaction to answer the question. CaCO3→CO2+CaO A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown.
What is the total mass of the products?
A. 10 grams
B. 15 grams
C. 30 grams
D. 60 grams

Use the chemical reaction to answer the question. Fe+O2→Fe2O3 What happens to atoms of Fe and O2 during the reaction?
A. They are lost.
B. They maintain their properties.
C. They are rearranged.
D. They gain mass.

What is most likely to occur during a chemical reaction?
A. Molecules of the original substance are lost.
B. Mass is conserved.
C. The original substance maintains its properties.
D. New atoms are created.

Use the chemical reaction to answer the question. NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2 A student mixes baking soda (NaHCO3) and acetic acid (HC2H3O2) to produce a chemical reaction shown.
Which statement about the reaction is correct?
A. There are more H atoms after the reaction.
B. The atoms of the reactants are regrouped during the reaction.
C. Atoms of Na are destroyed during the reaction.
D. Some atoms gain mass after the reaction.

Use the chemical reaction to answer the question. 2H2+O2→2H2O There are four atoms of hydrogen (H) before the reaction.
How many atoms of hydrogen are present after the reaction?
A. 5
B. 4
C. 2
D. 8
PLEASSSSSSSE ANSSSSWER ALL THE QUESTIONS------------

Answers

1.) A
2.)B

Explanation:

The total mass of products obtained in the reaction; CaCO3→CO2+CaO is 30 grams. Given the reaction; Fe+O2→Fe2O3, atoms of Fe and O2 are rearranged during the reaction. During a chemical reaction, mass is conserved. Given the reaction NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2, we can see that the atoms of the reactants are regrouped during the reaction. Given the reaction 2H2+O2→2H2O, there are four atoms of hydrogen before and after the reaction.

According to the law of conservation of mass, atoms are neither created nor destroyed in a chemical reaction. Similarly, mass is neither created nor destroyed.

This means that the number of atoms of each element before and after the reaction must remain the same. A chemical reaction only involves the rearrangement of atoms in reactants to form products.

The total mass of reactants must be equal to the total mass of products according to the law of conservation of mass.

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What was one was one important impact of Supreme Court's ruling in Bush v. Gore

Answers

Answer: the answer is b or c

Explanation:

I took it

The answer is C, i took that test before and got it right

Which unit listed below is NOT a standard unit of measure?

inches

meters

pint

quart

its science btw

Answers

Answer:

pint

Explanation:

Answer.............

I am pretty sure it’s c.

Students find an exposed layer of shale. Describe the ancient environment that might have once existed to create this rock layer.

Why is uniformitarianism an important principle to consider when making inferences about how earth’s geology has changed over millions of years?

please help!

Answers

Answer: Because it suggests that the processes that we see today are the same as in the past and will be in the future. We cannot see rock formations and there for we have no idea how rocks actually form.

Explanation:

Answer:

Uniformitarianism helps explain this because it suggests that the processes that we see today are the same as in the past and will be in the future. We cannot see rock formations and there for we have no idea how rocks actually form.

Explanation:

1. the rate of change in an object's position over time is called what
2. the type of energy that is the sum of kinetic and potential energy at any given time is what
3. A push Or pull that can change the motion of an object (examples: magnetic force, frictional force. Please Help me this is due tomorrow

Answers

Answer: 1 . velocity 2. total mechanical energy. 3. magnetic force

Answer:

1. Rise over run, slope, or velocity

2. Mechanical Energy

3. Temperature

It is a broad question

The image shows a wound in the epidermal tissue of the human skin. The epidermal tissue next to the wound undergoes mitosis to help in the healing process. Which phase of mitosis is the most useful in the healing process?

Answers

I would give the answer but did you already solve this how long was this?

The very important phase in mitosis called the metaphase is most useful in the healing process. In this phase the damaged cells are repaired or replaced with the new cells.

What is mitosis?

All eukaryotic cells undergo mitosis (plants, animals, and fungi). It is the method through which a plant, an animal, or a fungus renews and grows its cells. Our bodies are always undergoing it.

The ongoing death of cells is known as apoptosis (programmed cell death). These cells need to be regularly replenished in order for you to be alive and properly functional. This process depends on mitosis.

We are able to expand, recover from injuries, and replace damaged cells because of mitosis. Since this is the only method that these cells can replicate, mitosis is also crucial in creatures that reproduce asexually. The most useful phase in mitosis that is responsible for healing is metaphase.

Find more on mitosis:

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#SPJ2

The molecular diagram of a substance is shown above. The first picture is the substance before it was heated. The second picture is the substance after it was heated.

Which of the following state changes most likely occurred in the diagram above?
A.
liquid to solid
B.
solid to gas
C.
liquid to gas
D.
solid to liquid

Answers

D. for solids the molecules are very squished together. gas molecules don’t touch each other at all and have lots of room to move. liquids are in the middle and some touch, but aren’t as dense as solids

D.solid to liquid
It is solid first because it has no space to move but on the second one there is a lot of space and it is moving around which means it’s a liquid

Which word names melted rock and minerals found beneath Earth's crust?

A. lava
B. magma
C. rhyolite
D. gabbro

Answers

Magma is the answer

magma is the answer

Which type of selection is shown in the graph above?
A. Disruptive selection
B. Stabilizing selection
C. Disaster Selection
D. Directional selection

Answers

The anwser is A Disruptive selection

In the given graph, the Evolved Population is showing disruptive selection. Hence, the correct option is A. Disruptive selection.

Stabilizing selection is a form of natural selection where individuals with average phenotypes are more likely to survive and reproduce their number. In this selection, the population tends to maintain a stable phenotype. As shown in the graph, the population is maximum for the population having a moderate length of neck.

Disruptive selection is a type of natural selection where extreme phenotypes are preferred over average phenotypes, leading to an increase in genetic variation and the population becoming more diverse. In this type of selection, the population diverges into two or more distinct phenotypic groups. As shown in the graph, two ranges of the population are favored for having traits for extreme lengths of the neck.

To learn more about Disruptive selection:

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(1.) If at 100.0 mL solution contains 0.850 moles of a solute, what is the molarity ?
(2.) If the molarity of a solution is 12 M and the volume of the solution is 1.0 L, how many moles of solute does the solution contain ?

Answers

Answer:

See below

Explanation:

1) Moles / volume

.85 mole / .1 liter = 8.5 M

2) 12 moles are contained in one liter

Answer is 1 Moles volume
.85 mole / .1 liter = 8.5 M
2) 12 moles are contained in one liter

Students find another rock that is sandy and white. They drip hydrochloric acid on the rock, but it does not fizz. Describe the processes that contributed to the formation of this rock.

pleasee help!

Answers

Answer: The processes that formed the rocks are deposition, cementation, and erosion because there was no chemical reaction (fizz)

Explanation:

because there was no chemical reaction (fizz)

The Toucan has a long, narrow beak that allows it to reach fruit that is hard to reach for other birds. Plants, like the Monstera Plant, in the rainforest have long, grooved leaves to drop water to the forest floor. The excessive water that falls in the rainforest could lead to mold, so the leaves adapted to have “drip tips” that allow the water to run off of the leaves.
What type of adaptations are these? Compare and contrast the adaptations of the Toucan and Monstera Plants of the rainforest. Your answer should be 3–4 sentences long.

Answers

Answer:

i believe the answer is psychical adaptations

Explanation:

because the leaf changed over time

When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.

Answers

Answer:

Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.

Table B: Calculation of Kinetic Energy (KE)

Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500

To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.

For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2

Perform similar calculations for the other velocities and record the results in Table B.

Answer:

Explanation:mass of the bottle in each case is M = 0.250 kg

now as per given speeds we can use the formula of kinetic energy to find it

1) when speed is 2 m/s