Chemistry High School

I will brainless who can answer this all pleaseeeeej​

I Will Brainless Who Can Answer This All Pleaseeeeej

Answers

Answer 1

Answer:

1. False

2. True

3. False

4. False

5. False

6. True

7. True

8. not sure

9. True

10. False

Explanation:

Related Questions

does the character of a bond become more covalent or ionic when the difference in electronegativity of the bonded atoms increases?

Answers

The bond becomes more covalent

PLEASE HELPP!!
True or False: Non-metal is a kind of metal.

Answers

Answer:

Explanation:

FALSE.

I hope this helps <333

:3

using the standard enthalpies of formation, what is the standard enthalpy of reaction?

Answers

Answer:

This equation essentially states that the standard enthalpy change of formation is equal to the sum of the standard enthalpies of formation of the products minus the sum of the standard enthalpies of formation of the reactants. and the standard enthalpy of formation values: ΔH fo[A] = 433 KJ/mol.

Explanation:

Hope this helps.

How many kilojoules are equivalent to 10 Joules?

A) 0.001 kJ

B) 0.01 kJ

C) 1000 kJ

D) 10,000 kJ

Answers

Answer:

It should be B: 0.01 kJ

Answer:

Hey...The answer is B) 0.01 kJ

As an atom gains extra electrons, it also changes size. How does the size change, and what causes the change?


The atom gets smaller because there are more negatively charged particles inside the nucleus to pull subatomic particles in closely.

The atom gets smaller because there are more negatively charged particles inside the nucleus to pull subatomic particles in closely.

The atom gets smaller because there are more positively charged particles inside the nucleus to pull subatomic particles in closely.

The atom gets smaller because there are more positively charged particles inside the nucleus to pull subatomic particles in closely.

The atom gets larger because there are more negatively charged subatomic particles spread out around the nucleus.

The atom gets larger because there are more negatively charged subatomic particles spread out around the nucleus.

The atom gets larger because there are more positively charged subatomic particles spread out around the nucleus.

The atom gets larger because there are more positively charged subatomic particles spread out around the nucleus.

first to answer gets 50 points

Answers

Answer:

Expl

Electron: A negatively charged particle found circling or orbiting an atomic nucleus. An electron, like a proton is a charged particle, although opposite in sign, but unlike a proton, an electron has negligible atomic mass. Electrons contribute no atomic mass units to the total atomic weight of an atom.\anation:

You are given an unknown solution, which contains both aqueous barium ion, Ba2+ (aq), and aqueous lead(II) ion,
Pb²+ (aq). Which of your six solutions would allow separation of the ions?

Select all that apply.

A. Ammonium chloride, NH4Cl(aq)

B. Iron(II) nitrate, Fe(NO₂)(aq)

C. Nickel(1) chloride, NiCl(aq)

D. Silver nitrate, AgNO₂(aq)

E. Sodium hydroxide, NaOH(aq)

F. Sulfuric acid, H₂SO,(aq)

Answers

Given the six solutions, the solution that will separate aqueous barium ion and aqueous lead(II) ion is ammonium chloride.

In qualitative analysis, it is common to separate substances in solution by introducing a solution that preferentially precipitates one of the ions in solutions while leaving the other one in solution.

In this case, we know that all chlorides are soluble except those of lead, mercury and silver according to the solubility rules. Hence, if ammonium chloride is added to a solution of aqueous barium ion and aqueous lead(II) ion, lead II chloride is preferentially precipitated hence the ions are separated.

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the fact that matter is not created or destroyed in any chemical or physical change is called the

Answers

Answer:

Law of Conservation of Mass.

Is that Right?

Which of the following is NOT a way that water moves from the land to the atmosphere?

Answers

percipitation will be the right answer.

what is the second most abundant gas in the atmosphere

Answers

Oxygen is the second. The first is nitrogen which makes up 78% of air. Oxygen makes up 21% of air.

How many elements are in the compound calcium carbonate?

Answers

Answer: Calcium carbonate contains 3 elements, calcium, carbon, and oxygen. The formula is CaCO3.

Explanation:

Answer:

There are 3 elements.

Explanation:

The formula for calcium carbonate is CaCO3. The elements in it are Calcium, Carbon, and Oxygen.

Air pressure is greatest near the surface of the Earth in the _______.



Question 7 options:

Thermosphere


Mesosphere


Troposhere


Exosphere

Answers

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Air pressure is greatest near the surface of the Earth in the Troposphere .

The Troposphere because the troposphere contains about half of all the air in the entire atmosphere

a substance composed of two or more metals.

Answers

Answer:

A substance composed of two or more metals is called an alloy

Explanation:

it's an alloy or a compound

I need helpppppppppp​

Answers

Answer:

31: 1366.82

32: 6.45062

33: 12.50400

34: 210.42700

35: 63.88200 cm

36: -970.8772

Explanation:

4.550 x 300.4 = 1366.82

2.45002 + 4.0006 = 6.45062

26.004 - 13.5 = 12.50400

2.667 + (5.6 x 37.1) = 210.42700

2.34 x 4.55 x 6.0 = 63.88200

4.60 x 5.16 x 1.05 + 6.2 - 1002 = -970.8772

why are metals not used on transistors and integrated circuits

Answers

Answer:

The usage of gold is generally avoided in semiconductor technology, since it acts as a deep-level trap and recombination center, i.e. charge carriers of opposite sign do recombine at Au defects in Si and get lost to the current.

The three most common states of matter on Earth are solids,blank
and gases. A fourth state,blank
exists in stars and in
flashes.blank

Answers

Answer:

example:meaning of the blank you need to do complete the words

Explanation:

#CarryOnLearning

What is the health danger of breathing carbon monoxide

Answers

Answer:

Well, it´s dangerous because it displaces oxygen in the blood and deprives the heart, the brain and other vital organs.

Explanation:

What i mean by that is that breathing carbon monoxide reduces the amount of oxygen that can be transported in the blood stream to critical organs like the heart and brain. It can also causes E.g. dizziness, confusion, unconsciousness and even death.

I hope this answered yor question, if i did misundertood the question do tell me and i will try my best to explain it. Have a nice day!! :)

best answer will be tagged brainliest.... no spamming pliz​

Answers

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A. Chloride ions (CI)

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Potential energy is energy that is stored in an object. It isn't being used at the moment, but is waiting to do work. A good example is to think about a boulder sitting on top of a hill. Just sitting there, the boulder isn't doing anything. But because it is sitting on top of a hill, it has the potential to roll down and do some damage to a car or building below. The energy is stored in that rock because of its size (mass) and the distance it will travel once it starts rolling. Another good example is a rubberband. When you stretch a rubber band, it wants to move back to its original position, and thus you have given it potential energy. As the rubber band is released, potential energy is changed to motion.
Kinetic energy is energy of motion. A rubber band flying through the air has kinetic energy. When you are walking or running your body is exhibiting kinetic energy. This energy is performing work. Other examples of kinetic energy include: legs pump bicycle pedals, lightning snaps trees, cars travel down the street, football players making tackles, and 4-wheelers speeding through the woods.
Potential energy is converted into kinetic energy. As mentioned before, a stretched rubberband can change from having potential to kinetic energy. Another example of this change between kinetic and potential energy can be seen using a yo-yo. Before a yo-yo begins to fall from your hand it has stored energy due to its position. At the top (in your hand) it has its maximum potential energy. As it starts to fall the potential energy begins to be changed into kinetic energy. At the bottom its potential energy has been completely converted into kinetic energy so that it now has its maximum kinetic energy. Another example of the change between kinetic and potential energy is a waterfall. A waterfall has both potential and kinetic energy. The water at the top of a waterfall has stored potential energy. When the water begins to fall, its potential energy is changed into kinetic energy. This change in energy is used in Niagara Falls, Canada to provide electricity to parts of the northeastern United States.

Questions:
1. What is kinetic energy?
2. What is potential energy?
3. List 5 examples of Potential energy given in the above passage. The first two are filled in for you.
1. __A boulder sitting on top of a hill that could roll down.___________ 2. __A stretched rubberband.___________________________________ 3. ________________________________________________________ 4. ________________________________________________________ 5. ________________________________________________________
4. List 5 examples of Kinetic Energy given in the passage above. The first
two are filled in for you.
1. __Water falling down a waterfall.____________________________ 2. __Car moving through the streets.____________________________ 3. ________________________________________________________ 4. ________________________________________________________ 5. ________________________________________________________

Answers

Answer:

it's all in the passage

Explanation:

read over the passage and find the answer i promise they're in there.

How much energy does orange light have if its wavelength is 615 nm?

Use the ROYGBIV (red, orange, yellow, green, blue, indigo, violet)

Answers

Answer:

it would be 615

Explanation:

In what ways are the electronic structures of the group 14 (4A) elements similar? In what ways are they different?

Answers

Elements in the same group have the same number of outermost electrons.

What is electronic structure?

Electronic structure refers to the arrangement of electrons in the atom. We know that elements in the same group have the same number of outermost electrons.

However, as we come down the group, the inner shells of the elements in group 14 become bigger and the outermost shells are now found at higher energy levels such as n=4 or 5.

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Is density a characteristic property of water?

Answers

"Density is a characteristic property of water because the density of any sample of water (at the same temperature) is always the same. The density is 1 g/cm3." - Mazza

It is a characteristic property of water because the density of any sample of water (at the same temperature) is always the same.

What charge would each element obtain when it becomes an ion? a) aluminum e) lodine
b) lithium c) barium f) phosphorus g) sulfur d) bromine h) magnesium​

Answers

Aluminum forms an ion of +3 while the bromine atom form an ion of -1.

What is an ion?

An ion is an atom which has lost/gained one or more electrons. The ion will be positive if an electron is lost and will be negative when an electron is gained by the specie.

The ions formed by each of the species is;

Al = +3I = -1Li = +1Ba= +2P = -3S = -2Br = -1Mg = +2

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what are the units for the rate constant of a first-order reaction?

Answers

Explanation:

the units for the rate constant of a first-order reaction is :

[tex] = {s}^{ - 1} [/tex]

8 ^-1 that’s the answer for ur question

Identify the cells in interphase, prophase, metaphase, anaphase, and telophase by circling the cells.​

Answers

Answer: See diagram below

Explanation

Interphase- cell prepares to divide

Prophase- nucleolus disappears and chromosomes shorten

Metaphase- chromosome lines up in the center

Anapahase- chromatids are pulled apart to opposite poles

Telophase- cell about to/is divided into two

What are the valence electrons of an atom?
A.The electrons that remain closest to the nucleus
B.The electrons that an atom gains when it becomes an anion
C.The electrons that an atom loses when it becomes a cation
D.The electrons in the highest occupied energy level

Answers

Answer:

D

Explanation:

Valence electrons are the electrons in the highest occupied principal energy level of an atom.

Do you have more human cells or
bacteria cells in your body?

Answers

There are more bacteria cells in your body than human cells.

Which diagram or diagrams represent a compound?

Answers

Answer:

A - X Only

Explanation:

A 0.8612-g sample of a mixture of NaBr, NaI, and NaNO3 was analyzed by adding AgNO3 and precipitating a 1.0186-g mixture of AgBrand AgI. The precipitate was then heated in a stream of Cl2, convertingit to 0.7125 g of AgCl. Calculate the %w/w NaNO3 in the sample.

Answers

Percentage by weight of the NaNO₃, is given by the ratio of the mass of NaNO₃ to the mass of the sample

The percentage by weight of NaNO₃ in the sample is approximately 30.713 %

Reason:

Given parameters are;

Mass of sample of NaBr, NaI, and NaNO₃ mixture = 0.8612 g

Mass of AgNO₃ and AgI formed = 1.0186

Mass of AgCl formed = 0.7125

Required:

Percentage by weight of NaNO₃ in the sample

Solution:

Let A represent NaBr, let B represent NaI, and let C represent NaNO₃, we have;

Equation 1 A + B + C = 0.8612

The addition of AgNO₃, precipitates 1.0186 g mixture of AgBr and AgI, therefore, we have;

[tex]A \cdot\left(\dfrac{Molar \ mass \ of \ AgBr}{Molar \ mass \ of \ NaBr} \right) + B \cdot \left(\dfrac{Molar \ mass \ of \ AgI}{Molar \ mass \ of \ NaI} \right) = 1.0186[/tex]

Molar mass of AgBr = 187.77 g/mol

Molar mass of NaBr = 102.894 g/mol

Molar mass of AgI = 234.77 g/mol

Molar mass of NaI = 149.89 g/mol

Which gives;

Equation 2 [tex]A \cdot\left(\dfrac{187.77}{102.894} \right) + B \cdot \left(\dfrac{234.77}{149.89} \right) = 1.0186[/tex]

The forming of the precipitate by passing the compounds through a stream of chlorine gives;

[tex]A \cdot\left(\dfrac{Molar \ mass \ of \ AgCl}{Molar \ mass \ of \ NaBr} \right) + B \cdot \left(\dfrac{Molar \ mass \ of \ AgCl}{Molar \ mass \ of \ NaI} \right) = 0.7125[/tex]

Molar mass of AgCl = 143.32 g/mol

Therefore, we get;

Equation 3 [tex]A \cdot\left(\dfrac{143.32}{102.894} \right) + B \cdot \left(\dfrac{143.32}{149.89} \right) = 0.7125[/tex]

Solving equation (2), and (3) gives;

A ≈ 0.3252 g, B ≈ 0.2715 g

Plugging in the values of A, and B in equation (1), gives;

0.3252 + 0.2715 + C = 0.8612

C = 0.8612 - (0.3252 + 0.2715) ≈ 0.2645

The mass of NaNO₃ in the mixture, C ≈ 0.2645

[tex]The \ percent \ by \ weight \ of \ NaNO_3 = \dfrac{0.2645}{0.8612} \times 100 \approx \underline{30.713 \%}[/tex]

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Which of these objects has the properties of a solid?
A.
desk
B.
water
C.
rain
D.
milk

Answers

Desk (letter a) (i hope this helps)

Write the law of conservation of matter…
(Please Answer fast)

Answers

Answer:

The Law of Conservation of Matter states that matter cannot be created or destroyed. In a physical change, substances can change form, but the total mass remains the same. In a chemical change, the total mass of the reactants always equals the total mass of the products. Materials.

Law of conservation of matter is that matter cannot be created or destroyed. In chemical equations, the mass of the reactants must be equals to the mass of products.
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