Answer:
OB
Explanation:
tht is correct make me brainliest
What volume of water is needed to make 5.41 M solution with 47.71 moles of HCL?
Answer:
0.113 liters
Explanation:
5.41 M / 47.71 moles = 0.113 liters
Part G Wavelength is the distance between the crests (tops) or the troughs (bottoms) of two waves that are next to each other. Now measure the wavelength: Click the pause button. Move the horizontal ruler so that its 0 centimeter mark is at the top of a wave. Measure the distance to the top of the next wave to find the wavelength. What's the wavelength of your wave?
Answer: 4.4
Explanation:
Thats what my computer says after i submit answer
What happens to water molecules when a large quantity of thermal energy is added to water in the liquid state?
Answer:
The molecules gain kinetic energy, more farther apart, and become a gas.
Explanation:
Answer:
Explanation:
Continued heating of liquid water causes the molecules to vibrate even faster, steadily raising the temperature, Freezing When liquid water freezes, it releases thermal energy and turns into the solid-state, ice.
Phytoplankton are a diverse group of unicellular organisms that are neither plants nor animals. Phytoplankton use sunlight, carbon dioxide, and nutrients to live and grow. Do you think phytoplankton are producers, consumers, or decomposers? Explain your reasoning.
Answer:
They are producers
Explanation:
Phytoplankton are producers and this is because they synthesis their own food and produce energy. They photosynthesized and convert carbondioxide and water in the presence of light energy and chlorophyll to carbohydrates and oxygen. They are producers because they produce their own food.
HELPPPPO PLZZZZZ I have no idea how to do this
Answer:
A or B
Explanation:
Shorter wavelengths are faster and have more energy.
How many moles of oxygen gas occupy 67.2 L of volume at STP?
A 0.333
B 3.00
C 1.00
Answer:
I would say b hope this helps
Explanation:
have a good day btw i had this question before:D
Please help me, I will give you brainlist
Answer:
ʟᴇᴛᴛᴇʀ: ᴄ.
Explanation:
ɪʙᴀ ᴀɴɢ ᴇxᴘʟᴀɴᴀᴛɪᴏɴ sᴀ ʟᴀʜᴀᴛ ɴɢ ᴀɴsᴡᴇʀ
Which of the following reasons (specific to this lab) would have caused the percent yield of calcium carbonate to be less than 100%? Highlight all that apply (there may be more than one)
Some of the sodium carbonate never fully dissolved in the water and did not transfer when mixed with calcium acetate
The glassware used to mix the reactant solutions were not properly dried before use
Some of the calcium carbonate remained stuck to the side of the glassware after filtering
The product, calcium carbonate, was not fully dried out before weighing
Some of the calcium carbonate spilled when measuring its mass
Answer:
Some of the calcium carbonate remained stuck to the side of the glassware after filtering
Some of the calcium carbonate spilled when measuring its mass
Explanation:
The percent yield is obtained from;
Actual yield/Theoretical yield * 100
Usually, the actual yield is less than the theoretical yield thereby making the percent yield less than 100%.
In the case of this particular reaction; when some calcium carbonate remains stuck on the glassware or some calcium carbonate is spilled during weighing, the actual yield of product obtained from the reaction becomes less than the theoretical or calculated yield hence the percent yield becomes less than 100%.
Use the given Nernst equation and reaction to solve this problem. What is the potential of this cell with the given conditions?
2Li (aq) + F2(g) 2Li+(aq) + 2F- (aq)
E° = +5.92 volts
T = 200°C
[Li+] = 10.0 molar
[F-] = 10.0 molar
Answer:
The 2nd one is the one
Explanation:
and it isn't writen out all the way
2) What is an atom? Name and give the charges of the three particles inside the atom.
NEED HELP ASAPPP
What is the number of beryllium atoms in 78.0g of Be?
Answer: number of atoms is 5.21 · 10^24
Explanation: Atomic mass of Be is 9.012 g/mol.
Number of moles n = m/M = 78.0 g / 9.012 g/mol =
Multiply this with Avogadro number Na = 6.022*10^23 1/mol
1) Ions are formed between positive or negative charge.
2) Which one is not an ionic compound?
a) LiCl
b) MgBr 2
c) CaO
d) HCl
3) Write down chemical formula of ionic compound between Potassium (K) and Sulfur (S)?
4) How many valence electrons Group 1 elements have?
5) When group 1 element want to become stable by forming an ion, what will be its
charge?
6) How many valence electrons group 2 elements have?
7) When group 1 element want to become stable by forming an ion, what will be its
charge?
8) How many valence electrons group 16 elements have?
9) When group 16 element want to become stable by forming an ion, what will be its
charge?
10) List two properties of ionic compounds.
Answer:
1. No 1 looks like a statement and not a question.
2.Ionic compounds are usually formed from the transfer of electrons from metals to Non metals. All others are Ionic compounds except HCl(Its a covalent compound).
3. The Formula would be K2S. Exchange of Radicals takes place. Sulphur has a -2 charge and potassium has a +1 charge. when they both exchange radicals... The compound is K2S.
4.Group 1 elements have only 1 electron in their outermost shell.
5. its charge will be +1 because it loses the 1 electron in its outermost shell.
6.Group 2 elements have 2electrons in their Valence shell.
7.Already answered. same as No 5.
8. Group 16;Also known as group 6. They have only 6 electrons in their outermost shell.
9.When they want to become stable... they acquire 2electrons to complete their octet... so they possess a -2 charge by forming an ion.
10. i)They form ions when Dissolve in solutions
ii) They are hard and brittle
iii) They have high boiling points
Blank O2 + blank Mg arrow blank MgO
Select the coefficients that balance the equation:
MgO *
A) 1,1,1
B) 1,2,2
C) 2,3,4
D) 1,4, 2
Answer:
its a
Explanation:
a
At a particular temperature, K = 2.0 × 10-6 for the reaction
2CO2(g) ⇌ 2CO(g) + O2(g)
In an experiment 15.95 mol of CO2 is initially placed in a 1.6 L vessel. Calculate the equilibrium concentration of O2.
Give your answer to 4 decimal places.
Answer:
y = 0.037 M = [O₂]
Explanation:
Let's write the equilibrium reaction:
2CO₂ <--------> 2CO + O₂ K = 2x10⁻⁶
The problem states that we have initially 15.95 mol of CO₂ in a 1.6 L vessel. With this we can determine the concentration:
M = moles / V
[CO₂] = 15.95 / 1.6 = 9.97 M
Now, we need to write an ICE chart so we can have the equilibrium concentrations:
2CO₂ <--------> 2CO + O₂ K = 2x10⁻⁶
I. 9.97 0 0
C. -2y +2y +y
E. 9.97-2y 2y y
K = [CO]² [O₂] / [CO₂]² Replacing we have:
2x10⁻⁶ = (2y)² (y)² / (9.97 - 2y)² But K is <10⁻⁴ so we can neglect the substraction of 9.97 - 2y, we have then:
2x10⁻⁶ = 4y² (y) / (9.97)²
2x10⁻⁶ * (9,97)² = 4y³
y = ∛2x10⁻⁶ * (9,97)² / 4
y = 0.037 M = [O₂]Hope this helps
What is the total pressure of three gases, if the partial pressures are: 2.67 mmHg, 45.29 mmHg, and 789.6 mmHg
Answer:
The total pressure of three gases is 837.56 mmHg.
Explanation:
The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:
PT = PA + PB
This relationship is due to the assumption that there are no attractive forces between the gases.
In this case, the total pressure can be calculated as:
PT= 2.67 mmHg + 45.69 mmHg + 789.6 mmHg
Solving:
PT= 837.56 mmHg
The total pressure of three gases is 837.56 mmHg.
how does electromagnetic energy travel?
Electromagnetic radiation is a form of energy that propagates as both electrical and magnetic waves traveling in packets of energy called photons. There is a spectrum of electromagnetic radiation with variable wavelengths and frequency, which in turn imparts different characteristics.
This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space. ...
Why does such a small decrease in pH mean such a large increase in acidity?
Answer:
pH is an index of how many protons, or hydrogen ions (H+) are dissolved and free in a solution. The pH scale goes from 0 to 14. A fluid with a pH of 7 is neutral. Below 7, it is acidic; above 7, it is alkaline.
The more below or above 7 a solution is, the more acidic or alkaline it is. The scale is not linear—a drop from pH 8.2 to 8.1 indicates a 30 percent increase in acidity, or concentration of hydrogen ions; a drop from 8.1 to 7.9 indicates a 150 percent increase in acidity. Bottom line: Small-sounding changes in ocean pH are actually quite large and definitely in the direction of becoming less alkaline, which is the same as becoming more acidic.
If you think about it, we use descriptive words like this all the time. A person who stands 5’5” tall and weighs 300 pounds isn’t thin. If he loses 100 pounds, he still won’t be thin, but he will be thinner than he was before he went on the diet. (And we are more likely to comment that he’s looking trimmer than to say he’s not as fat as he used to be.)
6 moles of H2O is equal to how many molecules?
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 3.612x10²⁴molecules are in 6 moles of H[tex]_2[/tex]O.
What is mole?
The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample. There are so many formula for calculating mole.
we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number
number of atoms/molecules=number of moles × 6.022×10²³(Avogadro number)
number of moles of H[tex]_2[/tex]O= 6 moles
Substituting all the given values in the above equation, we get
number of atoms/molecules=6.022×10²³x6
number of atoms/molecules= 3.612x10²⁴molecules
Therefore, 3.612x10²⁴molecules are in 6 moles of H[tex]_2[/tex]O.
To know more about mole, here:
https://brainly.com/question/15209553
#SPJ2
When carbon disulfide, CS2, forms from its elements. Heat is absorbed. How much heat would be required to produce 5.0 moles of carbon disulfide
Answer:
5.9 × 10² kJ
Explanation:
When carbon disulfide, CS₂, forms from its elements, heat is absorbed. The corresponding value for the standard enthalpy of formation of carbon disulfide is 117.36 kJ/mol. The thermochemical equation that represents this process is:
C(graphite) + 2 S(s, rhombic) ⇒ CS₂(g) ΔH°f = 117.36 kJ/mol
117.36 kJ of heat are absorbed when 1 mole of CS₂ is formed. The amount of heat absorbed when 5.0 moles of CS₂ are formed is:
5.0 mol × 117.36 kJ/mol = 5.9 × 10² kJ
which of the following is a product in the chemical equation N + O2 = NO2
1. NO2
2. N
3. O
4. O2
A car travels at 60 m/s for 8 seconds. Calculate the distance it traveled.
480 meters
hope this helped!
Which one of the following pairs of separation techniques will BOTH separate salt from a mixture of salt and water?
Answer:
What are the options and i dont know what the options are but if one of them is distilation im 99.9% sure that is the answer.
Explanation:
Be sure to friend me and mark me as braniliest if im correct!
Jane set up an experiment with 7 types of dog food and 15 dogs. Each day she fed a different brand of dog food to the 15 dogs. Her
results are recorded in the bar graph above.
What might be the question Jane is asking in her experiment?
A)
What dog food cost the most?
B)
Which dog food do dogs like the best?
Which dog food has the most real meat?
D)
How many dogs only like to eat in the morning?
Answer:
I believe it's either D or A I did it in my math
ILL GIVE YOU BRAINLIEST!!!!Which of the following is an example of a description of climate? *
1 point
the relative humidity in Raleigh, NC
the current temperature in Knightdale, NC
the amount of rainfall in last week's storms added together
the average temperature and precipitation in Raleigh, NC over the past 30 years
Answer:
The relative humidity in Raleigh, NC
You can search it up online. Search up what is climate change and it will give you "the weather conditions prevailing in an area in general or over a long period." (On bing)
Explanation:
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!
What were some of the causes of the Amu Darya and Syr Darya rivers being ruined?
urban sewer drainage
tannery dumping
tourism
drying up
agricultural chemicals
Answer:
drying up
agricultural chemicals
Explanation:
WILL GIVE BRAINLIEST!
__ gain electrons in the formation of ionic bonds because they have such high ionization energies indicating a strong attraction between the electrons and the nucleus.
A- metals
B- nonmetals
Answer:
A-Metals
Explanation:
because they have valence electrons
A diagram of the areas surrounding the Gulf of Mexico is provided. A hurricane that comes in from the Gulf of Mexico will most likely have which of the following effects on Texas habitat?
A- Birds that eat fish on Galveston Island become extinct.
B- Trees in and around Austin are uprooted by heavy winds
C- Plants on Goose Island are killed by a surge of salt water.
D- Rains create new marshlands habitats in Brazos Bend.
Answer:
a
Explanation:
a!!$!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
How do you write balance equations Fe2 S3+O2-Fe2O3+SO2
Answer:
2Fe2 S3+6O2 → 2Fe2O3+3SO2
Explanation:
A sample of nitrogen gas is at a temperature of 50 c and a pressure of 2 atm. If the volume of the sample remains constant and the pressure increases to 3.2 atm, what ist eh enw temperature of the nitrogen gas
Answer:
The new temperature of the nitrogen gas is 516.8 K or 243.8 C.
Explanation:
Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.
Gay-Lussac's law can be expressed mathematically as follows:
[tex]\frac{P}{T} =k[/tex]
Where P = pressure, T = temperature, K = Constant
You want to study two different states, an initial state and a final state. You have a gas that is at a pressure P1 and at a temperature T1 at the beginning of the experiment. By varying the temperature to a new value T2, then the pressure will change to P2, and the following will be fulfilled:
[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]
In this case:
P1= 2 atmT1= 50 C= 323 K (being 0 C= 273 K)P2= 3.2 atmT2= ?Replacing:
[tex]\frac{2 atm}{323 K} =\frac{3.2 atm}{T2}[/tex]
Solving:
[tex]T2*\frac{2 atm}{323 K} =3.2 atm[/tex]
[tex]T2=3.2 atm*\frac{323 K}{2 atm}[/tex]
T2= 516.8 K= 243.8 C
The new temperature of the nitrogen gas is 516.8 K or 243.8 C.
Which radioisotope is naturally occurring?
Answer:
[tex]\frac{131}{53} I[/tex]
Explanation:
A naturally occurring element is an element that is not produced in a nuclear reaction.
Most of the trans-uranium elements are not natural, they are all synthetic elements which are produced as a result of nuclear reactions. They are unknown in nature.
Apart from [tex]\frac{131}{53} I[/tex], all other radioisotopes listed among the options are not natural elements.They are products of nuclear reactions.
