Chemistry Middle School

Unlike a mixture a compound always has:
A: a variable composition
B: a constant composition
C: allotropic composition
D: a metallic composition
an

Answers

Answer 1

Answer:

Explanation:

Answer 2

Answer:

Explanation:

Related Questions

In the following equation,
is being oxidized and
being reduced
is
iron oxide + carbon -> iron +
carbon monoxide
A. carbon, oxygen
B. iron, oxygen
C. iron, carbon
D. carbon, iron
Reset Selection
Previous
Next

Answers

Answer: carbon, iron

Explanation: From Founder Education

The reduced are iron and carbon respectively. option D is correct.

What are oxidation and reduction?

Oxidation is a chemical process that can be explained by the following four points of view – Oxidation in terms of oxygen transfer – Oxidation is the gain of oxygen. Oxidation in terms of electron transfer – Oxidation is the loss of electrons.

Reduction is part of a reduction-oxidation (redox) reaction in which atoms have their oxidation state changed. An organic redox reaction is a redox reaction that takes place with organic compounds. A combination of oxidation and reduction is a redox reaction.

Iron (III) oxide is reduced because it loses oxygen to form iron. Carbon monoxide acts as a reducing agent because it can reduce iron (III) oxide after the loss of oxygen.

Therefore, the correct option is D.

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I just need help all I need is the answer please some one

Answers

Answer: The correct fill-in-the-blank answers are:

1. through binary fission (already filled in)

2. be resistant to penicillin

3. through asexual reproduction.

4. cell replicates before

5. a simpler process

Explanation:

The correct fill-in-the-blank answers are:

1. Bacteria reproduce through binary fission (already filled in)

2. A parent bacterial cell is able to survive in the presence of antibiotic penicillin. Subsequent generations from this parent will be resistant to penicillin

3. Something that potatoes and bacteria have in common is that they both reproduce through asexual reproduction.

4. In asexual reproduction DNA from the parent cell replicates before it produces daughter cells.

5. Asexual reproduction is a simpler process than sexual reproduction.

Know more about Bacteria: https://brainly.com/question/6941760

Please help me por favor :'(

Answers

More volume, takes longer to heat all the molecules.

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

Answer asap thank you

Answers

Answer:

answer I don't know but I know

All things are made up of atoms and cells so indeed they are

some living organisms can be _________ while some are _________?

Answers

Answer:

1. animals

2. plants

Explanation:

1. plants 2.animals

What is the mass of the ethyl alcohol that exactly fills a 400.0 mL container? The density of ethyl alcohol is 0.789 g/mL.

Answers

Answer:

g = (0.789 g/mL) (200.0 mL) = 158

The mass of ethyl alcohol that exactly fills 400 ml of container is 315.6 grams.

How is mass related to density?

Formula of density is given as , density =mass/volume

∴mass=density×volume

From the formula it is evident that density and mass are directly proportional while density and volume are inversely proportional.

From the given data, volume=400 ml and density =0.789 g/ml

∴by the formula,mass=density×volume

mass=0.789×400

mass=315.6 g

Mass and volume are extensive properties that depend on the amount of substance while density is an intensive property and does not depend on amount of substance.

Intensive properties are properties which are independent,wherein size of particles does not change.These properties cannot be easily computed and are not easily identifiable.

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Which simple machines make up scissors?

A) one lever and one wedge
B) two levers and two wedges
C) one inclined plane and two pulleys
D) two inclined planes and two levers

Answers

A) one lever and one wedge

the answer is A) one lever and one wedge

Robert is thinking about buying a new refrigerator. His old refrigerator runs at about 43% efficiency. Which most likely accounts for the remaining 57% of the energy?

A: It is used up by the light in the refrigerator.
B: It is released to the surroundings as heat
C: It is converted into mechanical energy.
D: It stored as a form of potential energy.

Answers

Answer:

D it stores as a firm of potential energy

I am pretty sure it is d.

What was the low temperature for hurricane Katrina?

Answers

Answer: 90 degrees F

Explanation:

The temperature was 90 F (32 C)

5 Points for both questions.

QUESTION IN IMAGE. PLEASE HELP!

Answers

Answer:

The kinetic energy is 0J

Explanation: Mechanical energy is as much of potential and kinetic energy. Mechanical energy is never lost but only transformed from one form to another. As long as all the mechanical energy is as much as the potential energy then the kinetic energy is 0J. The mechanical energy of an object is found by summing its potential energy and kinetic energy.

It’s OJ because mechanical energy can give off the same

Which two biomes are known for experiencing all four seasons?

Answers

Answer:

Temperate deciduous forests

The two biomes which experience all four seasons are temperate forests and deciduous forests. Both of these biomes experiences summer, winter, spring and fall.

What are biomes?

Biomes are biographical units with specific biological communities. Each biome is characterized by the organisms live there. Five types of biomes are there namely, forest, tundra, deserts, grassland and aquatic.

The different seasons are summer, winter, spring, autumn, and monsoon. Deserts only have summer season and aquatic land and tundra have rainy season where as grass lands have summer and spring.

All other biomes except forests have only any two seasons. Tropical forests and temperate forests are biomes with vivid plant and animal varieties.

Hence, the two biomes which experience all seasons are temperate forests and deciduous forests.

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Use the drop-down menus to identify each type of galaxy pictured.

Galaxy A:

Galaxy B:

Galaxy C:

Answers

Cccccccccccccccccccccccccccc

Galaxy A: elliptical
Galaxy B: irregular
Galaxy C: spiral
Hope this can help

1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL

Answers

To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.

the correct answer is A 4.8 mL

How does an atom change if all of its electrons are removed?
p.s. I'll mark the first answer the brainliest if it is correct! ;)

a. The atom’s volume increases.

b. The atom’s mass increases.

c. The atom becomes positively charged.

d. The atom becomes negatively charged.

Answers

c. The atom becomes positively charged

if the electrons are removed it means theres no longer a negative charge to balance the positive charge of the protons in the atom

C the atom becomes positively charged

What is NOT true about genes and chromosomes?

Genese are located on chromosomes

Chromosomes are in the nucleus

A single chromosome can contain hundreds of genes

All of these are true

Answers

Let us go option by option :

1) Genes are located in chromosomes. TRUE

Chromosomes are in cell nucleus. A chromosome contains hundreds and thousands of genes. A normal have 23 pairs of chromosomes, and a total of 46.

2) Chromosomes are the in nucleus.

TRUE

Chromosome is structure found in nucleus of the cell. It is made up of protein and DNA.

3) A single Chromosome can contain hundreds of genes.

TRUE

single Chromosome can contain hundreds of tgenes.

4) All of the above

TRUE

As all the statements above are true. The correct option is 4.

Answer:

all of them are true

Explanation:

this is because chromosomes contain genetic materials and it is present in the nucleus.
Therefore, the correct option is 4) all of these are true

no problem

based on the following chart,which statement
below is not true

Answers

Answer:

D) The particles in lead are more spread out than those in corn oil.

Explanation:

The higher density an object has, the less spread out the particles in the object is. SInce lead's density is 11.35 and corn oil's density is 0.90, corn oil's particles would be more spread out.

D. The particles are more spread out than those in corn oil

Where is the DNA stored in a cell?

Answers

Answer: nucleus

Explanation:

The dna cells are in the Nucleus

PLSSSSSSSS HELP MEEEEEEEEEEEEEE

Answers

Answer: The answer to your question is B,C,D.

Answer: i think A, B, D?

Explanation:

Match each letter with the correct label. Use the atom diagram below.

Electron - Nucleus - Proton - Neutron

Answers

D= nucleus
C= protons
B= neutron
A= electron

Answer:

Explanation: First and foremost, we must carefully examine the provided diagram in order to properly name the sections of an atom diagram.

Step-by-step instructions are given along with the answers in sequential sequence.

Correct answer for (A) is Electron since they are present at the outermost shell of an atom.The correct answer for (B) is Neutron since it is the central element of an atom.The proton is the right answer for (C), as it is included in the nucleus grouping with the neutron.The nucleus is the correct option for (D) since it is the primary component of the atom and includes both protons and neutrons.

Learn more about the Atom here:

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Which choice describes an organism found in the understory of a rainforest? Responses

A. Palms and other small trees

B. Very tall trees

C. Bacteria

D. Thick, woody vines

Answers

Answer: Palms and other small trees

Explanation:

Answer:

A. Palms and other small trees

Explanation:

Understory Layer

Located several meters below the canopy, the understory is an even darker, stiller, and more humid environment. Plants here, such as palms and philodendrons, are much shorter and have larger leaves than plants that dominate the canopy. Understory plants’ large leaves catch the minimal sunlight reaching beyond the dense canopy.

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what would happen to the identity of a fluorine atom (F) if it gained 4 protons?

Answers

Answer:

A fluorine atom has nine protons and nine electrons, so it is electrically neutral. If a fluorine atom gains an electron, it becomes a fluoride ion with an electric charge of -1

Human obtain electricity through fossil fuel, nuclear, solar, geothermal, wind, biomass, and hydroelectric power.

For at least two of these, explain ways that using this resource could pollute freshwater.

Answers

For fossil fuel: Oil spills and leaks during extraction or transport can pollute water sources.

For nuclear power: An uncontrolled nuclear reaction can result in widespread a contamination of water.

if would make the environment smoother and safer for all of the animals and save plants,trees,oil

Explain how potential and/or kinetic energy are working in each of the pictures below

Answers

Answer: canetic carts

Explanation:

In the first one, kinetic energy got the roller coaster to the top of the hill, and it becomes lots of potential energy due to being at the top of a steep drop.

In the second one, it begins with potential energy, until the person is put into a falling motion, transferring to kinetic energy.

In the third one, there is potential energy, because the bow string is taut, and ready to release and allow the arrow to go flying.

In the fourth one, the car has gas which is potential energy, until it begins moving and is turned into kinetic energy.

Which of the following is the correct abbreviation for the air mass at point C in the diagram below?MT

mT

MP

mP

Answers

Answer:

mP C. Is right

Explanation:

mP C. Is right

If you want me to add more to that I can.

A ______________________is a group of stars that has been given a name to help us find certain stars or recognize them

a
cluster
b
gaggle
c
constellation
d
flock

Answers

Answer: constellations

Explanation:

Answer:

A constellation a group of stars that has been given a name to help us find certain stars or recognize them.

hence, C.) constellation

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