Please help, I'll give brainiest
Coffee is a solution containing caffeine, acids, alkaloids, water, phenols, and many other chemicals. The solvent in the coffee solution is (1) __________ and the rest of the chemicals dissolved in the solvent are called (2)_________.
3. What is the difference between a saturated solution and a supersaturated solution?
4. Is the following molecule, polar or nonpolar?
5. 12 eggs can be referred to as one dozen eggs.
______________ particles can be referred to as one mole of particles.
6.
The pH of a strong acid might be _____ while the pH of a strong base might be _____
The pH of pure water is _____.
7. What would be the pH of .002 moles of HNO3 dissolved in 2 L of water?
8. A base has a pH of 8.5. What is the concentration of OH- ions in the solution?
Solutes dissolve in solvents to form a solution. A saturated solution contains just as must solute as it can normally hold.
The solvent in the coffee solution is water and the rest of the chemicals dissolved in the solvent are called solutes. A solution is formed when a solute is dissolved in a solvent.
A saturated solution contains just as much solute as it can normally hold at a particular temperature while a supersaturated solution contains more solute than it can normally hold at a particular temperature.
A polar molecule contains covalent bonds between atoms having an electronegativity difference above 0.5. Such molecules are polar as electrons of the bond are drawn closer to the atom that is more electronegative.
According to Avogadro's law; 6.02 × 10^23 particles is referred to as one mole of particles.
A strong acid has a pH that may range from 0 - 3. A strong base has a pH of around 10 - 14. Water is a neutral substance and has a pH of 7.
From the information provided;
Number of moles of acid = 0.002 moles
Volume of solution= 2 L
Concentration of solution = number of moles/volume = 0.002 moles/2L = 0.001 M
pH = - log[H^+]
pH = - log[0.001 ]
pH = 3
From;
pH + pOH = 14
pOH = 14 - pH
pOH = 14 - 8.5
pOH = 5.5
pOH = - log[OH^-]
[OH^-] = Antilog[-5.5]
[OH^-] = 3.2 × 10^-6 M
Learn more: https://brainly.com/question/10609459
Bohr models do not correctly show the location of electrons in an atom explain why they are still useful to predict bonding of atoms
Answer:
looo
rdyxvxkxkvxkgxkgdkvx
Explanation:
lolollkvvbffffkhdhlxkgzfjzufsfjsdhayzyrzruzruzufzktzkgdjfdufskdgjgzjfgkzjgskf
which is the largest atom in group IV?
Answer:
A
Explanation:
god loves you
o Neutralization reactions are a type of__________
reactions.
• The removal of hydrogen ions and hydroxide ions from solution as they form________
causes the pH of the mixture to_________.
If the right amounts of acid and base react, the
resulting solution will be________
Answer:
nala
simba
Explanation:
Substances like liquid mercury are very ______, but substances like rubber are very _______
Answer:
electrons form the atoms f one material may move to the atoms of the other material. The movement of electrons from one atom to another changes the charge of the atoms. When an atom loses electrons, it is left with more protons than electrons, so it then has a positive charge. when an atom gains electrons, it has more electrons than protons so its charge is negative.
Explanation:
a gas is at 35.0°c and 3.50 l. what is the temperature at 7.00 l?
Answer:
363C
Explanation:
V = KT and T = V/K
3.5=k(35+273) = 308k
k=3.5/308 =0.011
new T=7.0/0.011=636K = 636-273 =363C
In an experiment combining vinegar and baking soda, gas is given off. In this
chemical reaction, the vinegar and baking soda are…
A elements
B products
C suspensions
D reactants
Answer:
The correct answer is D hope this helped :3Answer:
(D)
Explanation:
In the reaction between vinegar and baking soda, the reactants are vinegar (acetic acid) and baking soda (sodium bicarbonate). The products are sodium acetate, water, and carbon dioxide gas.
write the 5 major characteristics of traditional map making
Answer:
insta
Explanation:
Zak_1231 follow me
How do we determine the volume of an irreguler shaped object?
Answer:
You can measure the displacement when the object is placed in a certain volume of water.
Equation between Mg and H2O
Answer:
Mg + 2H2O → Mg(OH)2 + H2, is normally sluggish, but it becomes reasonably rapid when a milled composite of powdered magnesium metal and powdered iron (1−10 mol %) is used with sodium chloride solutions.
Explain how heat gets transferred?
Heat can travel from one place to another in three ways: Conduction, Convection and Radiation.
When you rub an inflated balloonon your head on a dry day,it can make your hair stand up! what force is that?
When you rub an inflated balloon on your head and it makes your hair stand up, the force that makes the hair stand up is known as static electricity.
When the balloon is rubbed on the head, electrons from the hair atoms move into the balloon, thus making the balloon to be negatively charged and the hair positively charged due to loss of electrons.
Unlike charges attracts. Thus, when you try to pull the balloon away slowly, the positively charged hair and the negatively charged balloon will attract each other and this is usually what makes the hair stand up.
More on static electricity can be found here: https://brainly.com/question/24160155
Answer:
static electricity
Explanation:
this is because there is an imbalance between negative and positive charges
when you keep on rubbing, a negative charge is created which is carried by electrons.
when you pull the balloon away slowly, the opposite charges attract to each other which makes your hair attract to the balloon
If the xylem vessels of a plant are plugged :
a)
No food will be made
b)
The plant will wilt (shrivel)
c)
The leaves will turn yellow
Answer:
b is right answer because xylem provide nutrition and water to the plant
what is the polystyrene?
Answer:
Polystyrene is a versatile plastic used to make a wide variety of consumer products.
Explanation:
Answer:
polystyrene, a hard, stiff, brilliantly transparent synthetic resin produced by the polymerization of styrene. Styrene is obtained by reacting ethylene with benzene in the presence of aluminum chloride to yield ethylbenzene.
Explanation:
in other words its a plastic
Which material is a heterogeneous mixture?
O A. A brass coin
B. Tap water
C. Vinegar
D. Soil
Answer:
D
Explanation:
Heterogeneous mixture is a mixture of non-uniform composition & in which the components can be easily identified
Answer:
Soil
Explanation:
Soil is made up of many things (therefore it's not pure) and does not appear to be uniform; it does not look the same throughout. Therefore it is heterogeneous.
what is the pattern of liquids and solids from the center of the earth out
Explanation:
I'm sorry if this doesn't answer this correctly but solid liquid solider solid liquid/solid
Which of the following elements has only one electron in its outermost s orbital?
A. F
B. Al
C.Mg
D.Na
Answer:
D: Na
Explanation:
Hope this helps!
Have a nice day!!
:D
Light energy travels in waves, originates directly from the Sun, and is used by plan
to make food. Scientist use light energy to create lasers for cutting, heating,
measuring. Light energy is so important that it is responsible for the existence
most life forms. Furthermore, light energy is the only visible form of energy. It ca
travel through air, space, water, and glass. Light travels in a straight line until
strikes an object or travels from one medium to another. As it travels from or
medium to another it appears to bend.
Which term is best used to describe the bending of light waves?
A
refraction
B
reflection
C
rotation
D
revolution
La
Answer:
A) Refraction , this is the correct answer.
Hope it helps!!
Answer:
A refraction. I'm an electrician building aspects they put circular cones through the building and where they bend they have refractors and so you can have a completely closed off building and the light will come through from the rooftops through these tubes and the light been through refractors to make it look like you have a moonroof
how many molecules of butane are contained in 25.0 ml of butane? the density of butane is 0.6011 g/ml and the molar mass is 58.12 g/mol.
Explanation:
To determine the molecules of butane we can either use multiple steps or use a combined equation based on the following formulas:
Molecules of butane = Moles × Avogadro's Number
Moles of Butane = Mass ÷ Molar Mass
Mass of Butane = volume × Density
∴ Molecules of butane
= [(volume × Density) ÷ Molar Mass] × Avogadro's Number
= ([(25.0 ml × 0.6011 g/ml) ÷ 58.12 g/mol] × (6.022 × 10²³ molecules/mol))
= 1.557 × 10²³ molecules
∴ 25.0 ml of butane of density of 0.6011 g/ml contains 1.557 × 10²³ molecules.What is the formula for Water?
Name full name element's name
Answer:
2 Hydrogen atoms and 1 Oxygen atoms makes water
Explanation:
Hope this helps^^
Answer: Its chemical formula H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms,
Explanation: i hopes it helps :)
what are some of the activities performed during experiment
Assume that wave B has a wavelength of 415 nm. Calculate the frequency of the wave. The value for c is 3.00 x 10 8 m/s. The wavelength of wave A is [__________]Hz.
The wave B has wavelength of 415 nm. The value for c is 3.00 x 10 8 m/s. The frequency is 7.22 x 10¹¹ Hz.
What is frequency?Frequency is defined as the number of waves passing through a fixed point in a given amount of time.
The frequency can also be defined as a repeated event is the number of occurrences per unit of time.
Frequency can be expressed as
f = c / ∧
Where c = 3.00 x 10⁸ m/s
∧ = 415 nm
So, f = 3.00 x 10⁸ m/s x 415 nm
f = 7.22 x 10¹¹ Hz.
Thus, the wave B has wavelength of 415 nm. The value for c is 3.00 x 10 8 m/s. The frequency is 7.22 x 10¹¹ Hz.
To learn more about frequency, refer to the link below:
https://brainly.com/question/5102661
#SPJ1
what is the potential energy of a 3 kg box lifted to 12.5 meters high?
Answer:
367.5 JExplanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
From the question we have
PE = 3 × 9.8 × 12.5 = 367.5
We have the final answer as
367.5 JHope this helps you
how do you determine the thermal energy of an object
Answer:
An object's thermal energy is dependent upon its temperature and mass. The higher the temperature of a given quantity of a substance, more is its thermal energy. Similarly, for the same temperature, higher mass of a substance will contain more thermal energy
What is the temperature of Spica?
Answer:
Mark me brianliest plzzzzzzzzzzzz (puppy eyes) plz
Explanation:
22,400 Kelvin
22,400 KelvinSpica A and B are both classified as B-type stars and are very hot, with surface temperatures of 22,400 Kelvin and 18,500 Kelvin respectively. The primary component has a luminosity of some 12,100 Suns while the secondary shines with the power of 1500 Suns.
characteristics of mixtures
Answer:
The mixture has no fixed composition.
To form a mixture energy is neither produced nor evolved.
The mixture has no fixed melting points and boiling points.
the Mixture retains the properties of its components.
Components of mixtures can be separated by simple physical methods.
how many electrons can occupy the 4p sublevel of a neutral atom of bromine
Answer:
6
Explanation
every p sublevel holds up to 6 electrons
so the 4p sublevel must hold up to 6 electonsr
Which two conversion factors would be used to convert the quantity of 4500 seconds into hours.
Answer:
the answer is A
Explanation:
in 60 seconds there is 1 minute and in 60 minutes there is one hour
Select the answer that completes each statement.
The
founded the Virginia colony.
The
government took over the Virginia colony because too many colonists had died.
and
worked on the tobacco plantations.
The
was the first elective governing body in a British colony.
Answer:
1 colonists
2 England
3 slaves
4 the House of Burgesses
Answer:
:)
Explanation:
Boron has two naturally-occurring isotopes. Boron-10 has an abundance of 19.8% and actual mass of 10.013 amu, and boron-11 has an abundance of 80.2% and actual mass of 11.009 amu. What is the average atomic mass for all isotopes of boron?
A 10.0 amu
B 10.5 amu
C 10.511 amu
D 10.812 amu
Answer:
D) 10.812
Explanation:
Given:
The two isotopes of boron (B).
Boron-10 has an abundance of 19.8% and Boron -11 has an abundance of 80.2%
To find:
The atomic mass of europium.
Solution:
Mass of Boron-10 = 10.013 amu
The percentage abundance of Boron-10 = 19.8%
The fractional abundance of Boron-10 =0.198
Mass of Boron-11 = 11.009 amu
The percentage abundance of Boron-11= 80.2%
The fractional abundance of Boron-11= 0.802
The average atomic mass of Boron = A.M
A.M = Mass of isotope x Fractional abundance of isotope
= 10.013amu x 0.198 +11.009amu x 0.802 = 10.81u
Therefore, D) 10.812 amu is the atomic mass of boron.
