Answer:
B is correct :)
Explanation:
Trust me I just took the test
oi oi oi oi ewin
.................
Show the work. Convert 150 mm Hg to psi.
pls help me, thanks
Answer:
2.9 psi
Explanation:
Pressure (mmHg) = 150 mmHg
Pressure (psi) =?
The pressure in pound per square inch (psi) can be obtained as follow:
51.715 mmHg = 1 psi
Therefore,
150 mmHg = 150 mmHg × 1 psi / 51.715 mmHg
150 mmHg = 2.9 psi
Thus, pressure in pound per square inch (psi) is 2.9 psi.
observation made when lead oxide passes through hydrogen gas
Answer:
a gray substance and colourless liquid
Explanation:
lead oxide is reduced to lead while hydrogen is oxidized to water
Need help with this question please.
Answer:
12.8
Explanation:
14 = pOH + pH
pH = 14 - pOH
pH = 14 - 1.2
pH = 12.8
Pure gold has a density of 19.3 g/cm³. if it is made into a crown. what will be the density of the crown? how can you find out if the crown is indeed made of pure gold and nothing else?
Answer:
19.3g cm^3
If it deviates from the original 19.3g cm^3
temperature usually increase when water condenses which behavior of water is most directly responsible for this phenomenon?
Answer:
Temperature usually increases when water condenses. What behavior of water is most directly responsible for this phenomenon? The release of heat by the formation of hydrogen bonds. Hydrogen bonds stabilize and keep the of ice farther apart than the water molecules of liquid water.
CHEMISTRY HELP ASAP
Use this balanced equation for the two questions below:
2KClO3(s) → 2KCl(s) + 3O2(g)
9. How many moles of KClO3 are used to produce 9.9 moles of O2?
10. How many moles of O2 are produced from 11.2 moles of KClO3?
PLS SHOW WORK TOO THX
Answer:
1 mole of KClO_3 contains 3 moles of O.
10 moles of O_2 contains 20 moles of O.
You need 20/3 moles of KClO_3 to produce 10 moles of O_2
Explanation:
sana makatulong
how many grams of ammonia produced from 1000 grams of N2?
Answer:
N2 + 3H2 ———> 2NH3
As we know 1000 grams ammonia is 58.82 moles so according to unitary method,
2 mole NH3 formed by 1 mole N2 hence 58.82 NH3 will be given by 29.41 moles N2.
No. Of moles = given mass/molar mass
Implies that
Mass of nitrogen required = 29.41*28 = 823.48 grams.
Explanation:
Propose a mechanism and predict the products for the solvolysis of 2-bromo-2,3,3-trimethylbutane in methanol.
Answer:
See explanation and image attached.
Explanation:
Solvolysis is a reaction in which the solvent is also the nucleophile. The reaction occurs by SN1 mechanism since it yields most stable carbocation. The SN1 mechanism predominates since a weak nucleophile/base is used.
The major product as shown is the image attached to this answer. The first step is the loss of the bromide ion followed by nucleophillic attack of the solvent. Loss of H^+ completes the mechanism.
Explain the difference between an exothermic and an endothermic reaction.
Answer:
Explanation:
Heat is a reactant.
If the equation requires heat to occur, the reaction is endothermic
The equation would have this model
A + B + heat =====> C + D
If the equation gives away heat, then it is exothermic
The equation would look like this. (I'll use a common reaction)
CH4 + 2O2 - heat ===> CO2 + 2H2O
The heat is minus when it has to be given away.
An alternating current complete 100 cycles in 0.1s. it's frequency is
Answer:
The frequency is 1000 cycles/s
Explanation:
An alternating current is an electrical current in which the current changes its magnitude and the sense cyclically. The frequency of this current is defined as the cycles that the current completes in one second.
As the current completes 100 cycles in 0.1 seconds, the frequency is:
100 cycles / 0.1s = 1000 cycles /s
The frequency is 1000 cycles/sCombine terms: 12a + 26b -4b – 16a.
Answer:
= -4a+22b
Explanation:
i hope this helps :)
Answer:
12a-16a =-4a
26b -4b =22b
the final answer is-4a +22b
What type of consumer eats only producers?
Answer: Primary consumers make up the second trophic level. They are also called herbivores. They eat primary producers—plants or algae—and nothing else. For example, a grasshopper living in the Everglades is a primary consumer
Answer:
primary consumer make up the second trophic level .they are also herbivores they eat primary consumer plants or alger and nothing else .for example a grasshopper living in the everglades is a primary consumer
A(n) _________ is an atom or a group of atoms with either a positive or negative charge
O compound
O ion
O molecule
O nucleus
Answer:
the answer is ion..
hope it helps..
How many moles of BaS would be used to make 1200 mL of a 10.OM solution?
What is the formula mass of ZrF4?
Answer:
167.217g/mol
Explanation:
Formula mass is defined as the mass in grams that a mole of a molecule weighs. To solve the formula mass of ZrF₄ we require the molar mass of Zr and of F (Molar mass Zr: 91.225g/mol; F: 18.998g/mol)
In this molecule, there is 1 mole of Zr and 4 moles of F. The formula mass is:
Zr = 1*91.225g/mol = 91.225g/mol
F = 4*18.998g/mol = 75.992g/mol
Formula mass: 91.225g/mol + 75.992g/mol
167.217g/molCan you all go vote for Dacia Campbell for Brainly Educator of The Year!!!!!
It would mean a ton!!! Plus, I'll give your profile a big THANK YOU...I'll give Brainliest and you get 50 points! Please, please, please. Go vote for her!
Answer:
i voted her!!!!
Explanation:
12. Which organelle is found in plant and animal cells and is involved in making cellular energy from
respiration?
Answer:
The mitochondria is the organelle found in plant and animal cells and is involved in making cellular energy from respiration.
Explanation:
36. Write a balanced chemical equation for each chemical reaction. (a) Solid copper reacts with solid sulfur to form solid copper(I) sulfide. (b) Sulfur dioxide gas reacts with oxygen gas to form sulfur trioxide gas. (c) Aqueous hydrochloric acid reacts with solid manganese(IV) oxide to form aqueous manganese(II) chloride, liquid water, and chlorine gas. (d) Liquid benzene (C6H6) reacts with gaseous oxygen to form carbon dioxide and liquid water.
Answer:
a) 2Cu(s) + S(s) → Cu₂S(s)
b) 2SO₂(g) + O₂(g) → 2SO₃(g)
c) 4HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(l) + Cl₂(g)
d) C₆H₆(l) + 15/2 O₂(g) → 6CO₂(g) + 3H₂O(l)
Explanation:
First, we have to write the chemical formulas for reactants and products. Then, to identify which is the state of matter of each compound (liquid: l, solid: s, aqueous: aq, gas: g). Finally, we write the equation and balance the atoms.
a) Solid copper reacts with solid sulfur to form solid copper(I) sulfide.
Reactants: solid copper (Cu(s)) and solid sulfur (S(s)). Product: copper(I) sulfide (Cu₂S) because sulfur anion has two negative charges (S⁻²) and we need two copper ions with one positive charge (Cu⁺) to obtain the neutral compound.
The balanced requires a coefficient of 2 for Cu(s) to balance the 2 Cu atoms on the products side:
2Cu(s) + S(s) → Cu₂S(s)
(b) Sulfur dioxide gas reacts with oxygen gas to form sulfur trioxide gas.
Reactants: sulfur dioxide (SO₂) and oxygen gas (which is a diatomic molecule: O₂). Products: sulfur trioxide gas (SO₃(s)).
The balanced equation is:
2SO₂(g) + O₂(g) → 2SO₃(g)
We need a coefficient of 2 for SO₂ and SO₃ to balance O and S atoms.
(c) Aqueous hydrochloric acid reacts with solid manganese(IV) oxide to form aqueous manganese(II) chloride, liquid water, and chlorine gas.
Reactants: aqueous hydrochloric acid (HCl(aq)) and solid manganese (IV) oxide (MnO₂(s), because we need two oxygen anions O²⁻ to neutralize 4 positive charges in Mn IV). Products: aqueous manganese(II) chloride (MnCl₂, because we need two chloride ions Cl⁻ to neutralize two positive charges in Mn(II)), liquid water (H₂O), and chlorine gas (Cl₂, because it is a diatomic molecule).
The balanced chemical equation is:
4HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(l) + Cl₂(g)
(d) Liquid benzene (C₆H₆) reacts with gaseous oxygen to form carbon dioxide and liquid water.
Reactants: benzene (C₆H₆) and gaseous oxygen (O₂). Products: carbon dioxide (CO₂, because C has valence IV) and liquid water (H₂O).
The balanced chemical equation is:
C₆H₆(l) + 15/2 O₂(g) → 6CO₂(g) + 3H₂O(l)
In this case, we need a coefficient of 15/2 for O₂ because on the product side there are 15 atoms of O (12 in CO₂ and 3 in H₂O).
Which is least likely to occur after an experiment is conducted to a test a hypothesis?
The data is analyzed to see if it supports or refutes the hypothesis.
• The same experiment is conducted again to see if the data are reliable.
The hypothesis becomes a theory if the results support it.
O A new experiment is designed to provide additional data about the hypothesis.
Answer:
4th one. (A new experiment is designed to provide additional data about the hypothesis.)
Answer:
The correct answer is C)The hypothesis becomes a theory if the results support it.
Explanation:
Question - Complete and balance the following chemical equations:
C8H18 + O2 --->
When you complete and balance the specific equation, give the following information:
State which type of chemical reaction this is.
Explain how you know which type of chemical reaction it is.
List the amount of each element you have when the equation is unbalanced. E.g. there is one mole of calcium on the reactants side.
Give the balanced chemical equation.
List the amount of each element you have when the equation is balanced.
The order of the elements that you balanced the equation with.
Explain how you know which coefficient to use for the specific compound.
Your Answer:
Answer:
2C8H18 + 25O2 -> 16CO2 + 18H2O
(16C, 36H, 50O)
H2O requires 2H per H2O, Meaning that you'd have 9H2O's from 1C8H18, but you still need that O2 for the CO2 and because the reactant side has 8C (within C8H18) You'd have to times the amount of required O2 from CO2 by 8. Even then you still don't have enough for both CO2 and H2O so you'll have to multiply MORE causing a bigger chain reaction resulting in 2C8H18 + 25O2 -> 16CO2 + 18H2O
Which product is often derived from the natural environment?
Answer:
coal, cotton, chinese tradictional medicine
What is NaC2H3O2 coefficient
Answer:yes coefficient u mean??
Explanation:
Calculate the pH when 64.0 mL of 0.150 M KOH is mixed with 20.0 mL of 0.300 M HBrO (Ka = 2.5 × 10⁻⁹)
Answer:
The answer is "12.06"
Explanation:
Given:
[tex]M(HBrO) = 0.3\ M\\\\V(HBrO) = 20 \ mL\\\\M(KOH) = 0.15 \ M\\\\V(KOH) = 64 \ mL[/tex]
[tex]\to mol(HBrO) = M(HBrO) \times V(HBrO) = 0.3 M \times 20 mL = 6 \ mmol\\\\\to mol(KOH) = M(KOH) \times V(KOH)= 0.15 M \times 64 mL = 9.6 mmol[/tex]
6 mmol of both will react
excess KOH remaining[tex]= 3.15 \ mmol[/tex]
Volume[tex]= 20 + 64 = 84 \ mL[/tex]
[tex][OH^{-}] = \frac{ 9.6 \ mmol}{84\ mL} = 0.01142\ M[/tex]
use:
[tex]pOH = -\log [OH^-][/tex]
[tex]= -\log (1.142\times 10^{-2})\\\\= 1.94[/tex]
use:
[tex]PH = 14 - pOH[/tex]
[tex]= 14 - 1.94\\\\= 12.06[/tex]
The pH of the resulting solution is 12.63.
The equation of the reaction is;
HBrO(aq) + KOH(aq) ------> KOBr(aq) + H2O(l)
Number of moles of KOH= 64/1000 × 0.150 M = 0.0096 moles
Number of moles of HBrO = 20/1000 × 0.300 M = 0.0060 moles
Number of moles of excess base = 0.0096 moles - 0.0060 moles = 0.0036 moles
Total volume of solution = 64.0 mL + 20.0 mL = 84 mL = 0.084 L
Molarity of excess base = 0.0036 moles/0.084 L = 0.043 M
pOH = -log[OH-]
pOH = -log[ 0.043 M]
pOH = 1.37
pH + pOH = 14
pH = 14 -pOH
pH = 14 - 1.37
pH = 12.63
Learn more: https://brainly.com/question/11897796
How many liters is 3.3 moles of a gas?
Answer:
224.1
Explanation:
A solution is prepared by dissolving 0.23 mol of hypochlorous acid and 0.27 mol of sodium hypochlorite in water sufficient to yield 1.00 L of solution. The addition of 0.05 mol of HCl to this buffer solution causes the pH to drop slightly. The pH does not decrease drastically because the HCl reacts with the ________ present in the buffer solution. The Ka of hypochlorous acid is 1.36 × 10-3.
Answer:
hypochlorite ion
Explanation:
The hypochlorous acid, HClO, is a weak acid with Ka = 1.36x10⁻³, when this acid is in solution with its conjugate base, ClO⁻ (From sodium hypochlorite, NaClO) a buffer is produced. When a strong acid as HCl is added, the reaction that occurs is:
HCl + ClO⁻ → HClO + Cl⁻.
Where more hypochlorous acid is produced.
That means, the HCl reacts with the hypochlorite ion present in solution
What is the Kc for the following reaction at equilibrium at 800∘C if [CO2]= 0.030 M ? CaCO3(s)⇌CaO(s)+CO2(g)
Answer:
0.030
Explanation:
Step 1: Write the balanced reaction at equilibrium
CaCO₃(s) ⇌ CaO(s) + CO₂(g)
Step 2: Calculate the concentration equilibrium constant
The concentration equilibrium constant (Kc) is equal to the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients. It doesn't include solids or pure liquids.
Kc = [CO₂] = 0.030
Use the following chemical equation, how many moles of ammonia (NH 3 ) produced when 3.15 moles of nitrogen (N 2 ) reacts with hydrogen (H 2 ) ? N 2(g) + 3H 2(g) 2NH 3(g)
Answer:
[tex]n_{NH_3}^{produced}=6.3molNH_3[/tex]
Explanation:
Hello there!
In this case, according to the given chemical reaction, it is possible for us to use the 1:2 mole ratio of nitrogen to ammonia to calculate the moles of the latter that are produced when reacting 3.15 moles of the former with hydrogen as shown below:
[tex]n_{NH_3}^{produced}=3.15molN_2*\frac{2molNH_3}{1molN_2}[/tex]
Thus, by solving the equation we obtain:
[tex]n_{NH_3}^{produced}=6.3molNH_3[/tex]
Best regards!
Can you help with question 8
Answer:
pH = 9.4
Explanation:
With the given molarity of OH⁻ species we can calculate the pOH of the solution:
pOH = -log[OH⁻]
pOH = 2.6
Now we can use the pOH to calculate the pH of the solution, with the following formula:
pH = 14 - pOH
pH = 14 - 2.6
pH = 9.4
So a solution containing a OH⁻ concentration of 0.0025 M has a pH of 9.4.
What is the empirical formula for C6H12?
Answer:
The empirical formula of C6 H12,