Chemistry High School

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Answers

Answer 1

Answer:

8.38×10raise to power 23

Explanation:

mass of sugar=density ×volume

=. 1.59g/ml×25ml=39.75

no. of miles= given mass/ molar mass

= 39.75/342.3g / mole

1 mole of sugar =C12 H22 O11

contains

12× 6.023 × 10 ∆23=72.28× 10∆ 23 ×6.023×10²³

= 8.38× 10²³

Related Questions

Earths seasons in Northern Hemisphere: Choose ALL that apply.

Question 4 options:

More concentrated sunlight makes for cooler temperatures


The summer solstice occurs when the earth is in a position so that the North Pole is tilted most directly toward the sun.


The atmosphere absorbs some of the sun's rays


The tilt and revolution of the earth as it moves around the sun cause the different seasons of the year.

Answers

The summer solstice occurs when the earth is in a position so that the North Pole is tilted most directly toward the sun.

What is the summer solstice?

The summer solstice happens when a pole on either the northern hemisphere or southern hemisphere, is found most inclined toward the sun.

The summer solstice then represents two different moments during the year according to the hemisphere.

The summer solstice happens on June 21, and this period represents the longest day of the year.

In conclusion, the summer solstice occurs when the earth is in a position so that the North Pole is tilted most directly toward the sun.

Learn more in:

https://brainly.com/question/4172420

Answer: B and D also hi

Explanation:

21. What is an electron energy level?

Answers

Electron is negative
Proton is positive
Neutron is just nothing really

can anyone help me with the last question.
it whould help me a ton

Answers

For the very last question you would first divide 8,900 by 12 and the number you get will be the answer. You should get 741.66

If an atom the atomic number 10 and the mass number 12, how many VALENCE electrons does it have?

Answers

The answer for this is 22

To make 4.25 L of 3.0 M NaOH solution how much of a 9.0 M NaOH solution would be needed?

Answers

Answer:

1.41 L

Explanation:

Initially the concentration of NaOH was 9.0M (say M1) finally the concentration becomes 3.0M (say M2)

intial volume (say V1) is to be calculated when the final volume (say V2) is 4.25L

we have,

M1V1=M2V2

or V1=(M2V2)/M1= 3.0×4.25/9.0= 1.41L

Hence 1.41 L of 9.0M solution is required to prepare 4.25L of 3.0M NaOH solution

The question and options are below {the attachment}
I don't have much time, so please help me!
TIME REMAINING
36:00

Answers

Answer:

i think its B

Explanation:

Why aren’t dominant genes ALWAYS more common?

Answers

Answer:

selective breeding

Explanation:

Example:  pretend that rabbits can only be brown or black and black is dominant. If only the brown rabbits reproduce it will eventually be more common    Hope this helps

can someone list these in correct order? from least brigehst to brightest?​

Answers

Polaris -least brightest
Pluto
Venus
Moon
Sun - most brightest

A gas has a volume of 900.0 mL at 35.0°C and 400.0 atm. What would the volume of the gas be at 258 °C and 700.0 atm of pressure?

Answers

Answer:

887 ML

Explanation:

yup

How do neutral metal atoms form ions?​

Answers

Answer:

Neutral atoms can be turned into positively charged ions by removing one or more electrons. ... Atoms that gain extra electrons become negatively charged. A neutral chlorine atom, for example, contains 17 protons and 17 electrons. By adding one more electron we get a negatively charged Cl- ion with a net charge of -1.

Gold can be pounded out to make a foil only a few atoms thick because of
A. Metallic Bonds
B. Ionic Bonds
C. Valence Bonds
D. Covalent Bonds

Answers

Answer:

A. Metallic Bonds

Explanation:

Metallic bonding is a type of chemical bonding that arises from the electrostatic attractive force between conduction electrons and positively charged metal ions.

what happens to the electrons in an ionic bond and a covalent bond?

Answers

Answer:

In ionic bonding, atoms transfer electrons to each other. Ionic bonds require at least one electron donor and one electron acceptor. In contrast, atoms with the same electronegativity share electrons in covalent bonds, because neither atom preferentially attracts or repels the shared electrons.

Answer:

In ionic bonding,

atoms transfer

electrons to each

other. Ionic bonds

require at least one electron

donor and one electron

acceptor. In contrast, atoms

with the same electronegativity

share electrons in covalent

bonds, because neither atom

preferentially attracts or repels

the shared electrons.

Which led to the formation of oceans after water on Earth’s surface evaporated?

Answers

Answer:

Explanation:

En tiempos de la formación de la Tierra, el planeta se encontraba a una elevada temperatura, por lo que no le resultaba posible retener ningún tipo de atmósfera. La ausencia de nubes de vapor de agua y océanos en la tierra primigenia era causa directa de su temperatura, ya que el agua se encontraba combinada con los materiales rocosos.

The sun released a strong burst of water vapor. As Earth cooled, water in the atmosphere condensed.

A homogenerous mixture is a mixture where you can see the different parts.
True
or
False

Answers

Answer:

the nwser is false

Explanation:

Its false becuase Homomogeneous means "One" and if you can see different parts of it then its not homogeneous. hope this helps!

help please
........​

Answers

I am pretty sure it is Vitamin A... but I could be wrong. Sorry if it is wrong.

HElPpp AsAPp I’ll mark you as brainlister!!

Answers

A. There is no extra information

The heart, arteries, and veins are all part of what body system?

Answers

Answer:

The circulatory system.

Explanation:

All of them are in charge of pumping blood and oxygen throughout the body, which is the job of the circulatory system.

C + O2 + CO2
What type of reaction occurs when carbon dioxide is formed from carbon and oxygen?

Answers

Answer:

combustion reaction.

Explanation:

It is a combination reaction as carbon combines with oxygen to form carbon dioxide. It is a combustion reaction as carbon is burnt in the presence of oxygen.

How many CARBON atoms are present in 2C3H8O3 ?

Answers

Answer:

b

Explanation:

Gasoline contains chemical potential energy. When you place gasoline in a car, you use up the gasoline and have to refill your gas
tank. How can a teacher state that energy can neither be created nor destroyed in light of this observation?
A)
The teacher is only talking about chemical reactions.
B)
The teacher is stating a theory and not an actual law.
0)
This is an exception to the law of conservation of energy.
D
The energy must be converted into different forms like motion and heat

Answers

i thinks the answer is B

Based on what you have read about wind turbines and dams, how does a generator work? A loop of Answer spins in a Answer field, producing Answer current. Item

Answers

Based on what you have read about wind turbines and dams, how does a generator work? A loop of ______ spins in a ______ field, producing ______ current.

Answer:

Wire

Magnetic

Electric

Explanation:

The generator works on the principle of converting mechanical energy into electrical energy.

For example in a wind turbine generator, the mechanical energy is the wind that pushes the blades of the turbine directly that leads to conversion of this it's linear motion to the rotary motion required to make rotor of the generator to spin. Finally, the harder the wind pushes, the more the mechanical energy applied and consequently, the more electrical energy can be generated.

Now, all generators work because of the effect of the magnetic field moving past an electrical coil.

Thus, the movement of a magnet across a single loop of wire produces a voltage that is induced within the wire loop as a result of the magnetic field produced by the magnet.

As a voltage is induced across the wire loop, electrons begin to flow around the loop thereby generating electric current.

100 cm3 of the copper sulfate solution contains 1.8 g of copper sulfate.
Calculate the mass of copper sulfate in 25 cm of this copper sulfate solution.

Answers

Answer:

The mass of copper sulfate in 25 cm³ of the copper sulfate solution is 0.45 g

Explanation:

The given parameters are;

The volume of the copper sulfate solution = 100 cm³

The mass of the copper sulfate in the solution = 1.8 g

Therefore, the mass of copper sulfate in 25 cm³ of the solution is given as follows;

The mass of copper sulfate in 100 cm³ of the solution = 1.8 g

The mass of copper sulfate in 1 cm³ of the solution  = 1.8 g/100 = 0.018 g

Therefore;

The mass of copper sulfate in 25 × 1 = 25 cm³ of the solution, m  = 25×0.018 g = 0.45 g

∴ The mass of copper sulfate in 25 cm³ of the solution, m = 0.45 g

A bag contains 3 red marbles, 3 blue marbles and 1 green if a marble is drawing from the bag at random what is the chance of the marble being blue

Answers

Answer:

three-seventh

Explanation:

When liquid H2O is chemically separated in a scientific investigation it forms H2 gas and O2 gas. If the number of hydrogen and oxygen molecules does not change through the equation, then the mass will
Select one:
decrease from reactants to products.

stay the same from reactants to products.

increase from products to reactants.

increase from reactants to products.

Answers

stay the same. this is the law of conservation

Radioactivity is the -------------- disintegration of an atomic nucleus that releases energy to become stable *

a. Extraordinary

b. Normal

c. Ordinary

d. Spontaneous​

Answers

Spontaneous, as it happens randomly

Answer:

The answer is spontaneous.

Solve for final product and show work for Na + NO3 ?

Answers

Sodium (Na) is atomic number 11, so it has 1 valency

While Nitrate (NO₃) has valency 1

Sodium has an extra electron while nitrate needs an extra electron, sodium gives its electron to nitrate and forms a bond,

NaNO₃ (Sodium nitrate)

Happy to help :)

The large number before a molecule in a chemical formula is called a _______________.

O subscript
O coefficient
O equation

Answers

the answer is coefficient

Answer:

Subscript

Explanation:

The little number you see to the right of the symbol for an element is called a subscript. That number indicates the number of atoms of that element present in the compound. When balancing an equation, you can change the coefficients but not the subscripts.

hope this helps! if not, it's got to be coefficient or equation

Ture or False: air has its components spread evenly, so it is considered a homogenous mixture.

Answers

Answer:

True.

Explanation:

The composition of a mixture is varied by altering the proportions of its constituents. True. Solutions are heterogeneous since the ratio of solute to solvent does not remain the same throughout the solution.

how are heat, temperature, and thermal energy related?​

Answers

Answer:

Heat, temperature, and thermal energy are related because they all work with each other.

Explanation:

First of all, everything start's off with temperature. It starts off low. But when heat is added to it, it rises and the temperature goes up. This causes thermal energy to the objects touching it. The hotter it is the faster the particles move and the more kinetic energy they have.  

A gas occupies occupies a volume of 0.2 L at 76 mmHg. What volume will the gas occupy at 760 mmHg?

Answers

Answer:

0.02

Explanation:

To solve this problem we use the Boyle's law equation

P1V1 = P2V2

P1 = 76mmHg

V1 = 0.2L

P2 = 760mmHg

V2 = unknown

Substituting values into the equation;

76mmHg * 0.2L = 760mmHg * v2

15.2 = 760V2

Divide through by 760 to get v2

15.2/760 = 0.02

So the gas will occupy a volume of 0.02 at 760mmHg

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