Answer:
you gotta call her manager dead or alive
What does this represent about the type of change
happening in the container?
O A chemical change started immediately and finished
at eight minutes.
O A non-chemical change started immediately and
finished at eight minutes.
O A chemical change occurred at four minutes.
O A non-chemical change occurred at four minutes.
Answer:
A) a chemical change started immediately and finished at 8 minutes!!Explanation:
it is stated that the substance slowly starts turning blue, not that it suddenly started changing!! and, this couldn't be a non-chemical change because there are very few chemicals that can turn a completely different color when the two substances were the same color!!! ^_^ please let me know if messed anything up
Answer:
A
Explanation:
on edge
11.select the correct description for the atoms below
Answer:
maybe a
Explanation:
Fossil fuels are an important natural resource used by society. Which of the following best describes fossil fuels?
a.
They are any liquid fuel derived from once-living matter.
b.
They are organic fuels derived from ancient plants and animals.
c.
They are fuels in which dinosaur fossils are commonly found.
d.
They are naturally occurring inorganic fuels like coal and petroleum.
Please select the best answer from the choices provided
A
B
C
D
Answer:
B.
They are organic fuels derived from ancient plants and animals.
Explanation:
Edg 2020
The statement 'they are organic fuels derived from ancient plants and animals' best describes fossil fuels (Option B).
What are fossils?Fossils are dead organisms (either dead plants or animals) that once lived on the surface of the Earth planet.
Fossil fuels are energy-rich organic materials that decomposed by suffering pressure on the Earth's crust for millions of years.Some examples of fossil fuels include, among others, natural gas, oil shales, coal, petroleum, etc.In conclusion, the statement 'they are organic fuels derived from ancient plants and animals' best describes fossil fuels (Option B).
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What is different about the particles in the three state of matter?
Answer:
liquids, gases, solids
Explanation:
Solids atoms are tightly packed which causes them to have no room and little vibration. Gases have a lot of room which causes them to bounce. And liquids have H2.o which means there atoms are spread very far apart. HOPE THIS HELPED!!
How does temperature affect mass?
Answer:
Increasing temperature increases vapor pressure, which speeds up outgassing and evaporation, both of which reduce the mass of the object of interest
A scientist develops a new experiment to test atomic theory. His results do not agree with the theory.
What will most likely happen next?
Scientists worldwide will reject atomic theory because of the new results.
The scientist will change his results to agree with the accepted theory.
Other scientists will reject the results because they do not agree with the theory.
The scientist will repeat the experiment to make sure that his results are reliable.
Answer:
When the results of a new experiment to test atomic theory do not agree with the theory, scientist will repeat the experiment to make sure that his results are reliable.
Explanation:
In the scientific context, each new experiment must be performed with precision and following the steps of the scientific method.
An experiment that does not provide reliable data to demonstrate a theory must be reviewed in detail and performed again to confirm the data obtained in the first attempt.
A theory is a postulate that tries to explain a natural phenomenon, but whose argument can be discussed or does not have the acceptance of a law. When the theory is proven and there are no arguments against it, it can be universally accepted and becomes a law.
The other options are not valid due to:
Scientists worldwide will reject atomic theory because of the new results. A theory cannot be discarded without solid arguments or evidence in order to dismiss it and establish a new one.The scientist will change his results to agree with the accepted theory. This would be an unethical procedure and unacceptable to the scientific community.Other scientists will reject the results because they do not agree with the theory. The opinion of other scientists is not enough to dismiss a theory, if it has a valid scientific basis.In the equation below how many molecules are there?
Ba(OH)2
Answer:
one
Explanation:
I think it one because molecule is the combination of non metals but I am not sure
Match the terms to their definition. 1. element one of the starting substances (ingredients) that is involved in a chemical reaction 2. heterogeneous the substance that does the dissolving 3. homogenous a substance that is made from only one type of atom. 4. product composed of dissimilar parts which can be separated easily and which are unevenly distributed in the mixture 5. reactant even distribution of parts throughout the whole mixture; not easily separated into individual components 6. solute the substance that is dissolved 7. solvent the substance created as a result of a chemical reaction
Answer:
1. Element - a substance that is made from only one type of atom
An element is made up of only one type of atoms and known for its unique properties than other elements.
2. Heterogeneous - composed of dissimilar parts which can be separated easily and which are unevenly distributed in the mixture
3.Homogenous - even distribution of parts throughout the whole mixture; not easily separated into individual components.
4. Product - the substance created as a result of a chemical reaction
Products are the final substance that created as a result of a chemical reaction.
5. Reactant - one of the starting substances (ingredients) that is involved in a chemical reaction
Reactants are the starting substance that takes part in a chemical reaction.
6. Solute - the substance that is being dissolved.
A Solute is a substance that is being dissolved in the solvent to make a solution.
7. Solvent - the substance that does the dissolving
A solvent is the medium in which the solute is being dissolved to make the solution.
A homogeneous mixture, like a solution, has an even distribution of its components throughout the whole mixture. It is not easily separated into individual components. On the other hand, a heterogeneous mixture, like a mixture of oil and water, has dissimilar parts that can be separated easily, and the components are unevenly distributed in the mixture.
1. Reactant: one of the starting substances (ingredients) that is involved in a chemical reaction.
2. Solvent: the substance that does the dissolving.
3. Solute: the substance that is dissolved.
4. Homogeneous: even distribution of parts throughout the whole mixture; not easily separated into individual components.
5. Heterogeneous: composed of dissimilar parts which can be separated easily and which are unevenly distributed in the mixture.
6. Element: a substance that is made from only one type of atom.
7. Product: the substance created as a result of a chemical reaction.
Let's match the terms to their definitions:
1. Element: A substance that is made from only one type of atom.
2. Reactant: One of the starting substances (ingredients) that is involved in a chemical reaction.
3. Product: The substance created as a result of a chemical reaction.
4. Solute: The substance that is dissolved.
5. Solvent: The substance that does the dissolving.
6. Homogeneous: Even distribution of parts throughout the whole mixture; not easily separated into individual components.
7. Heterogeneous: Composed of dissimilar parts which can be separated easily and which are unevenly distributed in the mixture.
For example, if we consider the reaction between hydrogen gas (H2) and oxygen gas (O2) to form water (H2O), hydrogen gas and oxygen gas would be the reactants. Water would be the product. In this reaction, hydrogen gas and oxygen gas are the starting substances that undergo a chemical reaction to form water.
In a solution, such as saltwater, the salt (solute) dissolves in the water (solvent). The salt is the substance that is dissolved, and the water is the substance that does the dissolving.
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You placed 18.4 g of aluminum shot into a graduated cylinder containing 25.50 mL of water. If the water level rises to the 39.10 mL mark, what is the density of aluminum?
Answer:
The answer is 1.35 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of aluminum = 18.4 g
volume = final volume of water - initial volume of water
volume = 39.10 - 25.5 = 13.6 mL
The density of the metal is
[tex]density = \frac{18.4}{13.6} \\ = 1.352941176...[/tex]
We have the final answer as
1.35 g/mLHope this helps you
select the correct answer
Answer:
all atoms have the same number of protons
Scientific theories are always
Answer:
Scientific theories are always testable. A theory may be changed as a result of new observations.
Explanation:
Hope this helps !
What do all the organelles endoplasmic reticulum and nucleus so far have in
Common
Answer:
These have the ability to digest intracellular macromolecules such as proteins, lipids and sugars. The functioning of the Golgi apparatus and ER are both so closely linked to the lysosomes that together, these entities compose the endomembrane system.
Explanation:
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Identify Give two examples of chemical properties.
A scientist is observing onion cells and human cheek cells under a microscope.
Which observation does she most likely make?
⚪ The onion cells have lysosomes, and the cheek cells do not.
⚪ The cheek cells have larger vacuoles than the onion cells.
⚪ The cheek cells have a nucleus, and the onion cells do not.
⚪ The onion cells have a cell wall, and the cheek cells do not.
by the way this is science
please answer this quick
Answer:
The onion cells have a cell wall and the cheek cells do not.
Answer:
The onion cells have a cell wall and the cheek cells do not.
When writing 6,020,000 in scientific notation, it is correctly written as:
1. 6.02 x 10 ^6
2. 6.02 x 10 ^-6
3. 0.602 x 10 ^-8
4. 602. x 10 ^6
Answer:
6.02*10^6 is ans
it mean (1)is correct
Which example is a type of matter?
A. My science teacher
B. Water
C. My chromebook
D. All of these are types of matter.
Answer:
D
Explanation:
I hope this will help you
The pressure of a 250 mL sample of gas is 105 kPa. What would be the pressure if the volume were increased to 375 ml?
Answer:
The answer is 70 kPaExplanation:
In order to find the pressure if the volume were increased to 375 ml we use Boyle's law
That's
[tex]P_1V_1 = P_2V_2[/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we are finding the final pressure
[tex] P_2 = \frac{P_1V_1}{V_2} \\ [/tex]
From the question
P1 = 105 kPa = 105 , 000 Pa
V1 = 250 mL
V2 = 375 mL
So we have
[tex]P_2 = \frac{105000 \times 250}{375} = \frac{26250000}{375} \\ = 70000[/tex]
We have the final answer as
70 kPaHope this helps you
Nylon is an important component in many products. One step in the production of nylon is the reaction of cyclohexane with oxygen to give cyclohexanone and water, shown below in the balanced
reaction in line formula notation. Determine the energy change for this process using bond energies.
Answer:
Follows are the answer to this question:
Explanation:
pleas find the attachment file.
Formula for ΔE:
[tex]\Delta E = \sum \text{Bond energy of recatants}- \sum \text{Bond energy of Products}[/tex]
[tex]= 6 ( B.E_{C-C}) +12 (B.E_{C-H}) +(B.E_{o \ = \ o}) - 6(B.E_{C-C})-10(B.E_{C-H}) -( B.E_{C=0}) -2(B.E_{0-H})\\\\ = \bold{2 (B.E_{C-H}) +(B.E_{o \ = \ o}) -( B.E_{C=0}) -2(B.E_{0-H})}\\\\[/tex]
to calculate the value for ΔE put the value in above formula:
Need help can somebody help me please
Answer:
A. filtration
B. distillation
C.magnet
D. evaporation
Explanation:
Which of the following electron configurations are written incorrectly?
1s22s32p6
1s22s22p63s23p64s23d5
1s22s22p63s23p3
4s23d104p7
3s1
2s22p4
Answer:
The electronic configuration that are incorrectly written is 1s²2s³2p⁶, 4s²3d¹⁰4p⁷, 3s¹ and 2s²2p⁴.
Explanation:
The electronic configuration of the elements corresponds to how all the electrons of an element are arranged in energy levels and sub-levels.
There are 7 energy levels —from 1 to 7— whose sublevels are described as s, p, d and f.
All electronic configurations begin with the term "1s" —corresponding to the sublevel s of level 1— so 4s²3d¹⁰4p⁷, 3s¹ and 2s²2p⁴ are incorrectly written. In addition, 4s²3d¹⁰4p⁷ is written incorrectly because is impossible to jump from the sublevel "s" to the sublevel "d" —which is found from level 3 and up— without passing through the sublevel "p".
In the case of 1s²2s³2p⁶, the wrong thing is that the sublevel "s" can only hold two electrons, not three.
The other options are correctly written.
13
Which one is heavier? 1 mole of Pbd,, 1 mole
of H, and 1 mole of Pb(NO3)2
A. Pbd
В. Н,
C. С None of them
D. Pb(NO3)2
Answer:
1 mole of Pbd - 239.3 g
1 mole of H - 1.008 g
1 mole of Pb(NO3)2 - 331.2 g
So D
Explanation:
1 mole of lead nitrate is heavier as it is a compound and is composed of three different kinds of atoms.
What is a compound?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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Which biomes would be found nearest to the equator?
tropical rain forests and savannas
tundras and taigas
tropical rain forests and taigas
tundras and savannas
PLS HELP ASAP
I’LL GIVE BRAINLY
Answer:
tropical rain forests and savannas
Explanation:
Tropical rainforests are found near the equator due to the amount of rainfall and the amount of sunshine these areas receive. ...
savannas-Because of their warm climate requirements, savannas tend to be found closer to the equator, which marks the halfway point between the north and south hemispheres of the earth. Because this area gets direct sunlight more of the year than the north and south extremes, the temperature doesn't change much.
Ap sublevel has 3 electrons. How should they be arranged
A.)Two electrons in the first p orbital and one in the second p orbital
B.)All electrons are in the first orbital
C.)One electron in each p orbital
D.)One electron in the first shorbital and 2 in the second
Hey
Answer:
C.)One electron in each p orbital
Explanation:
In a P-sublevel with 3 electrons, they should be arranged with one electron going into each p-orbitals.
This is in accordance with the Hund's rule of maximum multiplicity.
The rule states that "electrons go into degenerate orbitals or sub-levels(p,d and f) singly before paring up".
Since the p-orbital is 3-fold degenerate with a capacity to accommodate a maximum number of 6 electrons, given 3 electrons, they will follow the Hund's rule in order to fill the orbitals.
So one electron will go in each p - orbitals easily.
why each component does not change at all even when combined?
Answer:
This question is incomplete
Explanation:
This question is incomplete. But generally in chemistry, if there is no change in properties of the components of a substance, that substance is said to be a mixture. A mixture is a substance that contains two or more constituents that are physically combined and independently distinct. For example, a mixture of salt and water to form salt solution can still be retrieved as salt and water separately despite been in a combined form earlier. This is because this components/constituents (water and salt) are physically combined.
Please help I need help fast please
Answer:
1 is h
2 is a
3 is
4 is e
5 is d
6 is
7 is g
8 is
9 is b
10 is f
Changes in ______move matter from one state to another.
temperature
pressure
density
location
Answer:
temperature
Explanation:
The movement of electrons is what type of energy? A. Charge energy B. Kinetic energy C. Magnetic energy D. Electrical energy
Answer:
The movement of electrons is kinetic energy, capable of producing electrical energy (option B).
Explanation:
An electron is a mobile subatomic particle, located outside the atom and forming elliptical orbits, unlike protons and neutrons. In addition, each electron has a negative charge.
The energy on which the movement of the electrons depends is kinetic energy, which promotes this movement. The interaction between the negative charges of the electrons and the positive charge of the protons produces electrical energy.
The other options are not correct because the charge energy, electric energy and magnetic energy are consequences of the activity of the subatomic particles of the atom.
Answer:
D) Electrical energy
Explanation:
Hello! This is the correct answer! (I took the K12 test) If you are having any further trouble, please review the lesson. Hope this helps! Have a blessed day! :)
It takes more force to move an object with less mass.
True or false
Answer:
False
Explanation:
Answer:
False
Explanation:
Which properties change the composition of a substance? A physical properties
B chemical properties C chemical and physical properties D neither chemical nor physical properties
Answer:
chemical properties
Explanation:
chemical properties did change the composition of substance, so it cannot go back to original anymore, such as burning, rusting, etc.
I took the test before. I got all the answer correct and got 100% score.
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Learning Properties of Matter Quiz Unit 2 Lesson 11 Grade 8
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What is the volume of 50.0 g of aluminum? The density of aluminum is 2.70 g/cm3
V ≈ 18.5 cm³
Explanation:Hi there !
density formula
d = m/V => V = m/d
V = 50g/2.7g/cm³
V = 18.(518) cm³
V ≈ 18.5 cm³
Good luck !
