If a particular utility burned 2.90 million tons of coal that was 2.00% sulfur by weight, how many tons of sulfur dioxide was emitted?
Please help ill medal and fan!
After 15 minutes, 30 g of a sample of polonium-218 remain uncharged. If the original sample had a mass of 960 g, what is the half-life of polonium-218?
And
Suppose you want to separate the leaves, acorns, and twigs from a pile of soil. Filtration and distillation are two processes of separating mixtures. Explain which process you would use and why.
The ksp of zinc carbonate (znco3 is 1.0 × 10–10. what is the solubility concentration of carbonate ions in a saturated solution at 25°c? 1.4 × 10–5m 7.1 × 10–6m 1.7 × 10–5m 1.0 × 10–5m
What is the name of the ionic compound CaO?
The ionic compound CaO, composed of calcium and oxygen ions, is named calcium oxide. Calcium typically forms a Ca2+ ion and oxygen forms an O2- ion, resulting in a neutral compound. The naming process is straightforward for binary ionic compounds, using the metal's name and the nonmetal's name with an '-ide' suffix.
Explanation:The ionic compound CaO is composed of calcium (Ca2+) and oxygen (O2-) ions. In naming ionic compounds, we typically use the name of the metal (calcium) followed by the name of the nonmetal with an '-ide' suffix. So the name of the ionic compound CaO is calcium oxide.
When forming ionic compounds, calcium, which is a group 2 element, will typically lose two electrons to form a Ca2+ ion. Oxygen, being in group 16, will typically gain two electrons to form an O2- ion. The positive and negative charges of these ions balance each other, resulting in a neutral compound.
The naming of other ionic compounds also follows this simple process when dealing with binary compounds – those containing only two elements. For example, Li2S would be named lithium sulfide, since it is composed of lithium ions and sulfide ions. When dealing with transition metals, which can have more than one ionic charge, roman numerals are used to indicate the charge of the metal, e.g., cobalt(III) oxide for Co2O3.
what do we need to survive and how long for
How is the strength of a weak acid related to the strength of its conjugate base?
Final answer:
The strength of a weak acid is related to the strength of its conjugate base through an inverse relationship.
Explanation:
The strength of a weak acid is related to the strength of its conjugate base through an inverse relationship. According to the general rule, the stronger the acid, the weaker the conjugate base, and vice versa. This can be understood by considering the concept of acid-base equilibrium.
For example, if we have a strong acid and a weak base, the acid-base equilibrium will favor the side with the weaker acid and base. Conversely, if we have a weak acid and a strong base, the equilibrium will favor the side with the weaker acid and base.
Therefore, the strength of a weak acid and its conjugate base are inversely related, with the weaker acid having a stronger conjugate base.
Will vote brainliest on all questions. I have to do them in a series cause this j e r k moderator seems to not like me.
1. A mountain biker goes for a ride in the desert. The air temperature is 21°C at the start of the ride, but the temperature in the desert will reach a peak of 51°C. The tires on the bike hold 15.6 L of nitrogen gas at a starting pressure of 249 kPa. The tires will burst when the internal pressure (Pb) reaches 269 kPa. Answer the following questions and show your work.
• How many moles of nitrogen gas are in each tire?
• What will the tire pressure be at the peak temperature in the desert?
• Will the tires burst at the peak temperature? Explain.
• To what pressure should the tire pressure be reduced before starting the ride to avoid bursting of the tires in the desert heat? (Assume no significant change in tire volume.)
Using the ideal gas law, the number of moles, final pressure at peak temperature, burst likelihood, and reduced starting pressure before the desert ride can be calculated to ensure the mountain biker's tires do not burst.
To solve these problems involving a mountain biker's tire pressure in the desert, one would use the ideal gas law, which is PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the ideal gas constant, and T is temperature in Kelvin. Given this equation and the conditions provided, we can make some calculations.
How many moles of nitrogen gas are in each tire?
We are given the initial conditions: pressure (P) = 249 kPa, volume (V) = 15.6 L, and temperature (T) = 21°C. However, we need to convert these to SI units: P in Pa, V in m³, T in K. To calculate n, the number of moles of nitrogen gas in each tire, we rearrange the ideal gas law to n = PV/(RT).
What will the tire pressure be at the peak temperature in the desert?
To find the final pressure, we will assume the volume of the tires and the amount of nitrogen remain constant. We thus use the equation P₁/T₁ = P₂/T₂, where P₁ and T₁ are the initial pressure and temperature, and P₂ and T₂ are the final pressure and temperature.
Will the tires burst at the peak temperature?
By calculating P₂, we can determine whether the final pressure exceeds the burst pressure of 269 kPa.
To what pressure should the tire pressure be reduced before starting the ride to avoid bursting of the tires in the desert heat?
We need to work backwards using the ideal gas law to determine the reduced pressure that will not exceed 269 kPa when at peak temperature conditions.
How many electrons are needed in the outer energy levels of most atoms to be chemically stable?
Calculate the percent ionization of 0.0075 m butanoic acid (ka = 1.5 x 10-5) in a solution containing 0.085 m sodium butanoate.
The percent ionization of the solution is 0.017%.
The steps involved are;
Write the reaction equationSetup the ICE tablemake the necessary calculationThe equation of the reaction is;
CH3CH2CH2COOH(aq) ⇄ H^+(aq) + CH3CH2CH2COO^-(aq)
I 0.0075 0 0.085
C -x +x + x
E 0.0075 - x x 0.085 + x
The Ka of the acid = 1.5 x 10^-5
Hence;
1.5 x 10^-5 = x(0.085 + x)/0.0075 - x
1.5 x 10^-5 (0.0075 - x ) = x(0.085 + x)
1.1 x 10^-7 - 1.5 x 10^-5x = 0.085x + x^2
x^2 + 0.085x - 1.1 x 10^-7 = 0
x = 0.0000013 M
Percent ionization= 0.0000013 M/0.0075 × 100/1
= 0.017%
Learn more about percent ionization: https://brainly.com/question/9173942
SOMEONE PLEASE HELP ME! MEDAL, FAN, AND TESTIMONIAL
K3PO4 + Al(NO3)3 → 3KNO3 + AlPO4
How many moles of potassium nitrate are produced when 2.5 moles of potassium phosphate react?
Round final answers to the tenth position, one place after the decimal. Please remember your units.,
The volume of a gas is 4.00 liters at 293 k and constant pressure. for the volume of the gas to become 3.00 liters, the kelvin temperature must be equal to
When the ancient Greeks looked at the night sky they noticed that some points of light seem to "wander" in the sky. Which term do we use for these wanderers today? A. stars B. nebulae C. planets D. moons
Answer:
I think planets....?
Explanation:
I'm not actually sure but my brother told me it's nebulae and I think he's lying... stars don't move and the moon wouldn't actually be a "point" even if it was it wouldn't be plural....
Help. Please.
Calculate the percent of acetic acid in the vinegar. (The density of vinegar is 1.002 g/ml.) How would I do this?,
"when a hydrogen atom is covalently bonded to either oxygen"
Which diagram(s) represents the bonding pattern of metals?
A and B
C and D
A
C
The answer is the third option which is A.
Please vote Brainliest if I am right. (:
Answer is: A.
1. Metallic bond is a type of chemical bond.
2. Metallic bond is formed between electrons and positively charged metal ions.
3. Metallic radius is defined as one-half of the distance between the two adjacent metal ions.
4. Metallic bond increace electrical and thermal conductivity.
5. Metals conduct heat, because when free moving electrons gain energy (heat) they vibrate more quickly and can move around.
Temperature at which a substance goes from a solid to liquid
Calculate the number of moles in 3.025 X 10^28 atoms of NaCl.
1.0 mol NaCl
5.02 X 10^4 mol NaCl
5.02 X 10^50 mol NaCl
1.78 X 10^39 mol NaCl
What effect would poor circulation of the melting point bath liquid have on the observed melting point?
A theory which repeatedly fails to confirm the expected predictions:
probably needs to be developed into a law
probably should be discarded
requires more research time
should be maintained indefinitely,
Answer:
Probably should be discarded.
Explanation:
At standard pressure the boiling point of an unsaturated nano3(aq) solution increases when
Answer:
4
Explanation:
A student must find the total mass of several bouncing balls but none of the balls or remain on a triple beam balance propose a method for measuring the mass of the bouncing balls using the balance
A method for the student to find the total mass of the balls, without the problems of the balls not remaining in the balance, to synchronize a type of container or box that could house all the balls. With the container still empty, the student should weigh the container and note the weight. After that, the student should place the balls into the container and weigh the container along with the balls and note the weight.
In the second weighing the student will have the weight of the container along with the weight of the balls, but in the first weighing the student weighed the container alone. Thus, we can conclude that if the student subtracts the weight of the balls with the container by the hair of the soxinho regipiente, the student will result in the total mass of the balls.
What are five characteristics of a group on the periodic table?
Under standard condition and 298 K, the free energy difference, ∆Gº between the two chair conformations of a substituted cyclohexane molecule is 5.95 kJ/mol. What percent of the sample at equilibrium represents the most stable conformer?
Using the given free energy difference at 298 K and the equation ∆Gº = -RTlnK, we calculate the equilibrium constant (K) and determine that the most stable conformer of a substituted cyclohexane molecule comprises approximately 91.7% of the sample at equilibrium.
To determine what percent of the sample at equilibrium represents the most stable conformer of a substituted cyclohexane molecule, we use the free energy difference (
∆Gº) between the two chair conformations. Given that
∆Gº is 5.95 kJ/mol at 298 K, we first calculate the equilibrium constant (K) using the equation ∆Gº = -RTlnK, where R is the universal gas constant (8.314 J/mol•K) and T is the temperature in Kelvin. Substituting the known values, we have:
5.95 kJ/mol = - (8.314 J/mol•K)(298 K)lnK
Converting 5.95 kJ/mol to J/mol, we get 5950 J/mol. We then solve for K:
5950 J/mol = - (8.314 J/mol•K)(298 K)lnK
lnK = -5950 J/mol / (- (8.314 J/mol•K)(298 K))
lnK = 2.397
K = e^(2.397)
K ≈ 11.0
The ratio of the amounts of each conformer at equilibrium can be expressed as K = [Most Stable]/[Least Stable]. Hence, if the least stable conformer is taken as 1 part, the most stable will be 11 parts out of a total of 12 parts. The percent representation of the most stable conformer at equilibrium is then (11/12) * 100%, which approximates to 91.7%.
Therefore, the most stable conformer comprises approximately 91.7% of the sample at equilibrium.
Sugar cubes are placed in water. how will the mixture be affected by stirring the water, by breaking apart the sugar cubes, or by raising the temperature? each action will increase the speed that the sugar dissolves in the water. each action will increase the solubility of sugar in water. each action will increase the concentration of sugar that eventually is reached in the solution.
The empirical formula of a ompound is c2h5 and its formula mass is 58 amu. what is the molecular formula
What does a positive standard reduction potential mean about a given element?
The element is more readily oxidized than hydrogen.
The element is more readily oxidized than most other elements.
The element is more readily reduced than hydrogen.
The element is more readily reduced than most other elements.
The correct statement is " The element is more readily reduced than hydrogen." A hydrogen electrode is always attached to the rod of the element being investigated to obtain the electrode potential. It is called a standard hydrogen electrode, because the conditions are standard with pressure at 1 atm and the concentration of [tex]H^+[/tex] ions at 1M. A positive standard reduction potential means the element's electrode forms its metal ions less readily than hydrogen, which leads to the electrode being reduced by gaining electrons and the potential difference giving a positive value.
Which is not a characteristic of chemical equilibrium?
The reactions go to completion.
The reactions are reversible.
The reaction occurs in a closed container.
The forward and reverse processes occur at the same rate.
C. The reactions go to completion
The equilibrium constant is given for one of the reactions below. Determine the value of the missing equilibrium constant.
N2O4(g) ⇌ 2 NO2(g) Kc = 1.46
5 N2O4(g) ⇌ 10 NO2(g) Kc = ?
A) 1.46
B) 0.292
C) 6.63
D) 1.08
E) 7.30
Answer: C,
Answer:
The answer is C) 6.63
Explanation:
When the coefficients in a balanced equation are multiplied by a factor, the resulting equilibrium constant is raised to this factor.
In this case, you have the following equilibrium:
N₂O₄(g) ⇌ 2 NO₂(g) Kc = 1.46
In which the coefficients are 1 (for N₂O₄) and 2 (for NO₂)
In the second equation, notice that you have the coefficients of the first equation multiplied by 5 (1 x 5= 5 for N₂O₄; 2 x 5= 10 for NO₂) :
5 N₂O₄(g) ⇌ 10 NO₂(g)
Thus, to obtain the equilibrium constant of the second equation (Kc'), you have to raise the first equilibrium constant (Kc) to 5:
K'c= (Kc)⁵= (1.46)⁵= 6.63
The solubility of a salt in a given volume of water depends primarily on the
You are asked to bring the pH of 0.500L of 0.550 M NH4Cl to 7.00. Which of the following solutions would you use: 12.0 M HCl or 12.0 M NH3? How many drops (1 drop 0.05 mL ) of this solution would you use?
The answer to part one is 12.0 M NH3 but how do you answer the second part?
Thank you