Answers
Answer:
a
Explanation:
Coal is fossilized animal and plant remains
Related Questions
2) A student performed the titrations done in this experiment. The student pipetted 25mL of solution that contained saturated calcium hydroxide solution and 0.05 M calcium ions into a flask and then titrated it with 0.103 M HCl. It required 2.77mL of HCl to reach the orange-red end point. Calculate the molar solubility of calcium hydroxide in this solution.
Answers
Answer:
5.706x10⁻³M
Explanation:
Based on product solubility of Ca(OH)₂:
Ca(OH)₂(s) ⇆ Ca²⁺ + 2OH⁻(aq)
Ksp = 5.5x10⁻⁶ = [Ca²⁺] [OH⁻]²
Where [Ca²⁺] is 0.05M and [OH⁻] is obtained from the reaction with HCl.
The molar solubility, S, will be:
S = [OH⁻]/2
The [OH-] is:
Moles HCl = Moles OH⁻
2.77x10⁻³L * (0.103mol / L) = 2.85x10⁻⁴ moles OH⁻ in 25mL = 0.025L:
2.85x10⁻⁴ moles OH⁻ / 0.025L = 0.0114M = [OH⁻]
And S is:
0.0114M/2 =
5.706x10⁻³Mwhats on the right side ?
Answers
Answer:
B) Products
Explanation:
Answer:
B. products
Explanation:
PLEASE ANSWER MY QUESTION
https://brainly.com/question/22082435
What drives the flow of energy in cycling of matter in the atmosphere
Answers
WDYT a mixture is? Please help
Answers
Answer:
A mixture is when two substances are physically combined and can be taken apart.
Explanation:
my words
When an atom loses an electron, the resulting charge on the atom is ____
Answers
Answer:
Positive
Explanation:
The atom will gain a positive charge by losing an electron
Answer:
cation
Explanation:
Which element is more metallic among beriliyum or calcium? Give reason
Answers
I hope this helps!
Which kind of wind is most likely responsible for the movement of this
weather system from Dallas to St. Louis and then to Pittsburgh?
A. Southern polar easterlig
B. Westerlies
C. Northern polar easterlies
D. Trade winds
SUBMIT
Answers
Answer: Westerlies
Explanation:
Answer:
B. Westerlies
Explanation:
I got ir right
During the daytime, we can see things because the sun is giving off
heat energy
light energy
sound energy
electrical energy
Answers
Answer:
light energy
.................
Answer:
light energy
Explanation:
heat does not effect how we see
the sun does not have sound
electrical energy does not effect how we see
Did this substance gain or lose electrons?
Answers
Answer:
it gained
Explanation:
therefore it is an anion cause it is negatively charged ion
I just got confessed to
but i only like the person 89% out of 100...
what should I do ?
Answers
Answer:
:)haha
Explanation:
Answer:
:D
Explanation:
how many chemical bonds are in glucose?
Answers
Answer:
4 covalent bonds
Explanation:
In the reaction shown, how many moles of HCl are needed to react with 2.4 moles of Al?
2 Al + 6 HCI - 2 AlCl3 + 3 H2
оа
7.2
Ob
6.4
Ос
0.8
d
1.3
е
4.8
Answers
Answer:
7.2 moles
Explanation:
Since the equation is balanced, we can use a mole ratio. 6 moles of HCl : 2 moles of Al. Thus, to convert, we simply multiply by 3.
Answer:
7.2 moles of HCl
Explanation:
The balanced reaction equation of the reaction is;
2 Al + 6 HCI ---------> 2 AlCl3 + 3 H2
We can see from the reaction equation that;
6 moles of HCl reacts with 2 moles of Al
Hence;
x moles of HCl reacts with 2.4 moles of Al
x = 6 * 2.4/2
x = 7.2 moles of HCl
Obtaining crude oil for refining is an example of
A. Constructive occupation
B. Extractive occupation
C. Manufacturing occupation
D. Tertiary occupation
E. Service occupation
Answers
Answer:
B: extractive occupation
help me with this pleasee
Answers
I. Escribe el tipo de reacción al que pertenece cada una de las siguientes reacciones: a. P4(s) + 3 O2 (g) → 2 P2O3 (g) b. CaCO3 (s) → CaO (s) + CO2 (g) c. Cu (s) + AgNO3 (ac) → CuNO4 (ac) + Ag (s) d. Pb(NO3)2 (ac) + NaI (ac) → PbI2 (s) + 2 NaNO3 (ac) e. FeCl3 + 3 NH4(OH) → Fe(OH)3 + 3 NH4Cl f. N2 + 3 H2 → 2NH3 g. Zn + 2HCl → H2 + ZnCl2 h. 2HgO → 2Hg + O2 i. 2H2(g) + O2 → 2H2O(l) j. 2H2O(l) → 2H2(g) + O2(g) k. Mg(s) + Cu(NO3)2 (ac) → Mg(NO3)2 (ac) + Cu(s) l. 2Na + 2H2O – > 2NaOH + H2 m. H2O + CO2 – > H2CO3 n. 2KClO3 – > 2KCl + 3O2 o. NaCl + LiNO3 – > NaNO3 + LiCl
Answers
Which of the following pieces of evidence suggests there was a chemical change?
Change in color
Change in shape
Change in size
Change in state
Answers
Answer:
Change in colour will be the answer.
7. A sample of helium gas occupies a volume of 24.6 L at 2.20 atm. What would its volume be at 3.50 atm?
Answer: 15.5L
Please show your work
Answers
so, here's your answer, 15.5L (appr)
Need help with this 1 question ASAP POINTS ADDED
Answers
Answer:
Atomic number hopefully this will help
Atomic number
Explanation:
because chemical elements are organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number (example of it increasing)The partial pressure of fluorine gas in a 2.00 L container is 0.85 atm while the partial pressure in that same 2.00L container of argon gas is 1350 torr. a) What is the total pressure, in atm? b) What is the mole fraction of argon in the container?
Answers
Answer: The total pressure, in atm is 2.62
b. The mole fraction of argon in the container is 0.67.
Explanation:
a) According to Dalton's law, the total pressure is the sum of individual pressures.
[tex]p_{total}=p_A+p_B+p_C...[/tex]
Given : [tex]p_{total}[/tex] =total pressure of gases = ?
[tex]p_{F_2}[/tex] = partial pressure of fluorine = 0.85 atm
[tex]p_{Ar}[/tex] = partial pressure of Argon = 1350 torr = 1.77 atm ( 760 torr = 1atm)
putting in the values we get:
[tex]p_{total}=0.85atm+1.77atm=2.62atm[/tex]
b) According to Raoult's law, the partial pressure of a component at a given temperature is equal to the mole fraction of that component multiplied by the total pressure.
[tex]p_{Ar}=x_{Ar}p_{total}[/tex]
where, x = mole fraction
[tex]1.77atm=x_{Ar}\times 2.62atm[/tex]
[tex]x_{Ar}=0.67[/tex]
The mole fraction of argon in the container is 0.67.
What elements and molecules are used in the process of photosynthesis.
Answers
Answer: Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
Explanation:
Answer:
carbon dioxide + sun = sugar and o2
Explanation:
During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.
hope that helps have a great day
1 poin
2) Iron is found in the Earth as iron
oxide (Fe203). Iron oxide is reduced
to produce iron. Balance the equation
for the reaction: ...Fe2O3 + ..... →
.....Fe + .....CO2
Your answer
Answers
duehrneidudbeneisubebekeidbdbbe
how many grams of hydrogen gas are needed to react with 688 grams of oxygen to make water? (3 sig figs)
Answers
Answer:
86 g H₂
Explanation:
The reaction between hydrogen gas (H₂) and oxygen gas (O₂) to produce water (H₂O) is described by the following balanced chemical equation:
2 H₂(g) + O₂(g) → 2 H₂O(g)
As we can see, 2 moles of H₂ reacts with 1 mol of O₂. We have to convert the moles to mass by using the molar mass (MM) of each compound:
MM(H₂) = 1 g/mol x 2 = 2 g/mol
2 moles H₂ = 2 mol x 2 g/mol = 4 g
MM(O₂) = 16 g/mol x 2 = 32 g/mol
1 mol O₂ = 1 mol x 32 g/mol = 32 g
Thus, 4 grams of H₂ reacts with 32 g of O₂. The stoichiometric ratio H₂/O₂ is 4 g H₂/32 g O₂. So, we multiply the stoichiometric ratio by the mass of O₂ we have (688 g) to calculate the grams of H₂ we need:
4 g H₂/32 g O₂ x 688 g O₂ = 86 g H₂
#1 Predict the electron and molecule geometry with 6 bonding domains and a single lone pair.
Bad answers will get reported. Correct answers get 50 points and brainliest!
Answers
Answer:
According to VSEPR theory the molecule with six binding domains and single lone pair will have the pentagonal bipyramidal geometry. As it is known that six binding domains means six bonds and a single lone pair means one pyramidal bond, so that it does not repel bonds to a higher extent. Hence, total of seven bonds are required which is provided by the pentagonal bipyramidal geometry. The number of electrons of the molecule will be fourteen 2 from each of the 6 binding domains that makes up to 12 and 2 from the lone pair.
Chemistry help equations
Answers
Answer:
no reaction will occur .
What are thermal plasmas?
What are thermal plasmas?
Answers
Answer:
Plasmas that reach a temperature equal to their surroundings.
Explanation:
I'm studying this right now and took a similar test.
Answer:
Plasmas that reach a temperature equal to their surroundings.
Explanation:
Sulfur,Iodine,.Carbon,Hydrogen put these lowest to highest
Answers
Answer:
The order is Hydrogen, Carbon, Sulfur, Iodine
Explanation:
According to the periodic table. The order is Hydrogen, Carbon, Sulfur, Iodine. You can search up an image of a periodic table, it will help you.
Which one of the following is NOT a characteristic of living things. *
Organized
Maintain certain internal conditions
Respond
Have feelings
Answers
Answer:
3
Explanation:
What is a picture of homologous pairs of chromosomes and sex chromosomes?
nuclear DNA
stereotype
karyotype
allele
Answers
Hope this helps :)
If you try to place the compound on the pan over the flame, what could possibly happen? Explain your answer. [2 marks] anyone please help me!!:(
Answers
Answer:
it will probably flame up or explode or maybe start boiling
A clownfish uses a sea anemone as a safe place to live. While living there, the clownfish lures in food for the anemone. This is an example of what type of relationship?