zero kelvin, or minus 459.67 degrees Fahrenheit (minus 273.15 degrees Celsius)
can i have help with this ???
Answer:
section 2
Explanation:
it has the shiny silver apperance but at the same time is hard and brittle
What kind of crystalline solid is copper?
PLS HELP
Help please with the 2 questions i will mark you brainliest
Answer:
The first one would be "Both Mixtures and Compounds", while the second one would be "Solution 2 - Because she used more salt".
Explanation:
An element is made up of atoms, but to make a mixture or compound you are combining multiple elements. And when look at the second question, assuming they have the same amount of water, there is a higher ratio of salt in the second one, which would make it more concentrated.
What is the pH of .038 M HCI?
Answer:
is simple apply formula dude.
how much energy does it take to melt 125 g of water
Please help and thank you
Does anyone know any top brainly users that are good at chemistry?
Answer:
yes
Explanation:
Answer:
These people were ranked best at chemistry
Explanation:
explain why the sun's light seems to be all around us instead of focused like a spotlight on the earth.
Answer:
Hmmm
Explanation:
To be honest this seems to be a straight forward question but it's not at the same time. I mean obviously the sun is in the center and we just surround it. So it's light kinda just hits the whole Earth. In space or on the Moon there is no atmosphere to scatter light. The light from the sun travels a straight line without scattering and all the colors stay together. Looking toward the sun we thus see a brilliant white light while looking away we would see only the darkness of empty space.
PH CHEM, PLEASE HELP QUICK! NO LINKS/VIRUSES PLEASE!
A solution is created by measuring 3.60 x 10-3 moles of NaOH and 5.95 x 10-4 moles of HCl into a container and then water is added until the final volume is 1.00 L. What is the pH of this solution?
Answer:
The pH of the solution is 11.48.
Explanation:
The reaction between NaOH and HCl is:
NaOH + HCl → H₂O + NaCl
From the reaction of 3.60x10⁻³ moles of NaOH and 5.95x10⁻⁴ moles of HCl we have that all the HCl will react and some of NaOH will be leftover:
[tex] n_{NaOH}} = n_{i_{NaOH}} - n_{HCl} = 3.60 \cdot 10^{-3} moles - 5.95 \cdot 10^{-4} moles = 3.01 \cdot 10^{-3} moles [/tex]
Now, we need to find the concentration of the OH⁻ ions.
[tex] [OH^{-}] = \frac{n_{NaOH}}{V} [/tex]
Where V is the volume of the solution = 1.00 L
[tex] [OH^{-}] = \frac{n_{NaOH}}{V} = \frac{3.01 \cdot 10^{-3} moles}{1.00 L} = 3.01 \cdot 10^{-3} mol/L [/tex]
Finally, we can calculate the pH of the solution as follows:
[tex] pOH = -log([OH^{-}]) = -log(3.01 \cdot 10^{-3}) = 2.52 [/tex]
[tex] pH + pOH = 14 [/tex]
[tex] pH = 14 - pOH = 14 - 2.52 = 11.48 [/tex]
Therefore, the pH of the solution is 11.48.
I hope it helps you!
How many oxygen atoms were used to write Felicia’s name?
Answer:
Explanation:
https://opentextbc.ca/introductorychemistry/chapter/molecules-and-chemical-nomenclature-2/
Use the figure to answer the following questions.
A
B.
с
12. The shape of Virus B would be classified as a(n)
13.
Conversion of nitrogen into a usable form is known as
14. With an antibiotic, there would be
cells on day 7.
15. Bacteria can break down radioactive waste, such as
How many moles is 45g of KCl?
Answer:
60.36
Explanation:
Answer: 0,60 mol
Explanation:
Molar mass of KCl is M = (39.10 + 35.45) g/mol = 74,55 g/mol
amount of substance n = m/M = 45 g / 74.55 g/mol
can someone help out pls
Answer:
1. Acids
2. Its molecular arrangement
3. Very acidic
4. Unsaturated
5. Apple juice
Explanation:
1. Acids have pH less than 7
2. Water molecules have a polar arrangement of the oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge.3. Very acidic
4. Unsaturated solutions are solutions in which the amount of dissolved solute is less than the saturation point of the solvent (at that specific temperature gradient).
5. The lower the pH, the more hydrogen molecules.
He principal quantum number, n, represents the: a sub level of an electron b main energy level of a proton c main energy level of an electron d sub level of a proton
Answer:
c. main energy level of an electron
Explanation:
An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are considered to be the building blocks of matter and as such defines or determines the structure of a chemical element.
Generally, atoms are typically made up of three distinct particles and these includes; protons, neutrons and electrons.
In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
The principal quantum number, denoted by n, represents the main or overall energy level of an electron.
Basically, this property of an electron determines its energy level, as well as its distance from the nucleus of an atom of any chemical element. Also, as the distance of each orbital from the nucleus increases, the energy level increases respectively. Thus, sets of orbitals having the same principal quantum number (n) are generally referred to as an electron shell.
HELP ME ON THIS
What happens to the particles of a solid when the solid changes into a liquid? (5 points)
They increase in size.
They decrease in size.
The attractive force between them increases.
The attractive force between them decreases.
Answer:
The attractive force between them decreases
Explanation:
This is because they become localised.
Which process produces the energy that is used by solar panels?
A. Combustion
B. Chemical Decay
C. Nuclear Decay
D. Nuclear Fusion
D. nuclear fusion
I just took the test
A nucleus of uranium 235 decays. Its decay produces a nucleus of an unknown element (x), a nucleus of helium 4 and energy. What kind of radiation is produced by this decay?
Gamma beta or alpha?
Answer: Alpha
Explanation:
Alpha particle form of decay produces a nucleus similar to the element helium. During Alpha decay an atom spits out two protons and two neutrons from its nucleus.
help me get this right no links
Answer:
the rise and fall is the tides.
Vitamin B12, cyanocobalamin, is essential for human nutrition. It is concentrated in animal tissue but not in higher plants. Although nutritional requirements for the vitamin are quite low, people who abstain completely from animal products may develop a deficiency anemia. Cyanocobalamin is the form used in vitamin supplements. It contains 4.34% cobalt by mass. Calculate the molar mass of cyanocobalamin, assuming that there is one atom of cobalt in every molecule of cyanocobalamin. WebAssign will check your answer for the correct number of significant figures. g/mol
Answer:
645 g/mol
Explanation:
Step 1: Given data
Percent by mass of cobalt in cyanocobalamin: 4.34%
Step 2: Determine the molar mass of cyanocobalamin
There is one atom of cobalt in every molecule of cyanocobalamin, or what is the same, there is 1 mole of atoms of Co in every mole of molecules of cyanocobalamin. Given the molar mass of Co is 28.01 g/mol, the molar mass of cyanocobalamin is:
100 g B12/4.34 g Co × 28.01 g Co/1 mol Co × 1 mol Co/1 mol B12 = 645 g/mol
How many moles of glucose are produced?
How many moles of oxygen are produced?
Explanation:
5.00 mol H2O × (1 mol C6H12O6/6 mol H2O)
= 0.833 mol C6H12O6
5.00 mol H2O × (6 mol O2/6 mol H2O)
= 5.00 mol O2
Help me get it right and no links
ANSWER ASAP PLEASE!
Balance the following equation:
_Fe + _O₂ --> _FeO₃
What does MVLMEN stand for
What mass of silver nitrate will react with 5.85 grams of
sodium chloride to produce 14.35 grams of silver chloride
and 8.5 grams of sodium nitrate?
Will give brainliest please help!!
Answer:
I think it's B so maybe
explain ocean acidification
Answer:
Ocean acidification refers to a reduction in the pH of the ocean over an extended period of time, caused primarily by uptake of carbon dioxide (CO2) from the atmosphere
Explanation:
Answer:
Ocean acidification affects marine life
Acidification reduces the availability of carbonate ions in ocean water, which provide the building blocks these organisms need to make their shells and skeletons, significantly reducing the chances for their offspring to survive.
Explanation:
Ocean acidification is the ongoing decrease in the pH of the Earth's oceans, caused by the uptake of carbon dioxide (CO. 2) from the atmosphere. The main cause of ocean acidification is the burning of fossil fuels.
Identify the limiting reactant when 24.5 g of H2 is made to react with 152.5 g of CO using the formula CO (g) +2H2 (g) --> CH3OH
Explanation:
1 mole of Carbon monoxide reacts with 2 moles of. Hydrogen gas ... use the mole ratio to determine the number of ... the coefficients of the balanced equation. 35.0 g Al mol Al. 26.98 g. Al.
How many moles are in 33 L of CO₂ gas at STP?
In triangle ABC,m angle C=90^ , m angle A=54^ , and CA = 10 centimeters . What is the length of overline AB to the nearest centimeter
Answer:
AB = 17 cm
Explanation:
NOTE: This is a mathematics question. Nevertheless, the answer to the question is given below
Please see attached photo for diagram.
The length of AB can be obtained as follow:
Angle A = 54°
Adjacent = 10 cm
Hypothenus = AB =?
Using the Cos ratio, we can simply obtain the length of AB as follow:
Cos A = Adjacent /
Cos 54 = 10 / AB
0.5879 = 10 /AB
Cross multiply
0.5879 × AB = 10
Divide both side by 0.5878
AB = 10 / 0.5878
AB = 17 cm
Which of the following is true of a balanced equation?
1. The number of atoms per molecule remains the same
2. The kinds of atoms remain the same
3. The number of atoms of each element remains the same
4. The total number of molecules remains the same
Answer:
The total number of molecules remains the same