戇戇居士

Can Acetone hydrogen bond with itself? why does it have a lower boiling point than cyclohexane?

Ksp Question?

Ph of HCL and dissociationdegree pleasse help?

Maxima and Minima of Quadratic function help?

How would you do this maths binomial expansion question? I have no idea. <https://gyazo.com/adabd2e0933df6e036d19420e0095125>?

On newton law of motion?

what type of solid is formed for each of the substances: C2H5OH,CH4,CH3Cl,MgSO4 arrange these substance in order of increasing melting point?

What is the total distance traveled by the ball for 0<=t<=2?

Calculate how many moles of SOCl2 are in 35.0g of SOCl2.?

What volume of 0.408 M K3PO4 is required to react with 28 mL of 0.75 M MgCl2 according to the equation?

A man is 6 feet 2 inches tall. To find the height of a tree, the shadow of the man and the shadow of the tree were measured.?

A balloon contains 25 g of helium gas. If 5 grams of helium gas is released from this balloon then the balloon will have a smaller volume.?

a^3+b^3-c^3+3abc=?

A 19.0-L tank of carbon dioxide gas (CO2) is at a pressure of 9.10 x 10^5 Pa and temperature of 21.0°C.?

Chemistry help please?

If 5 kg of haematite gives 2.78 kg of iron what is percentage purity of haematite?

If 5 kg of haematite contain 2.78 kg of iron then what is the percentage purity of haematite. It contains gangue?

A dilute aqueous solution of Na2SO4 is electrolyzed between Pt electrodes for 3.75 h with a current of 2.85 A .?

Proving identities?

What is x+6/2 + x-9/5 as a single fraction?

nitric acid + zinc?

IF cos(-θ)=(3/5) and sinθ <0, find tan θ?

One lit of an unknown gas weighs 1.25 grams at s.t.p one possiboe formula of gas Co2 Co O2 So2?

what is the density of methane gas at room temperature ?

Solve the inequality. Write the solution set in interval notation. 9x + 7 ≥ 5x + 3x?

Are the two carbon atoms of C2H5Cl equivalent?why? How about the 5 H atoms?Are they equivalent, if so why?

X^4 - 4x2 and 4x^2 - 9, solve the following?

Finding the derivative of F(t)=ln(arctan(t)). Can someone please help me find the derivative of this function? Thank you in advance!?

Find the arc length of a circle if the central angle measures 90degrees and the radius measures 30 inches?

How would you prepare 2-butanol from 1-propanol?

Thermochemistry question.?

Two cylindrical wires are made of the same metal. If wire 2 has 8 times the length and 10 times the diameter of wire 1.?

A 1.0-L buffer solution is 0.120 M in HNO2 and 0.180 M in NaNO2. A)Determine the concentrations of HNO2 and NaNO2 after addition of 1.7 g HC?

Maths problem help please?

Calculus Antiderivative?

Find the value of x square + 1 / x square if x - 1/x =root 3?

How do i solve this trig equation. ((sin(s)^2 - sin(s) - 2)(1 - sin(s))/(cos(x)^2?

x+y+z=5 x+y=6 y+z=4 In the solution of the equations above, y=? A.1 B.2 C.3 D.4 E.5?

濃鹽酸12N (1)配置成100ML的3N HCL須加多少水及濃鹽酸? (2)配置成500ML的0.1N HCL 須加多少濃鹽酸極佳多少水?

In 72 hours the amount of a radioactive substance has reduced from 40 mg to 20 mg. What is the half-life of this isotope?

-2/3x+30>80?

the values of x and y are directly proportional, and y=4 when x=5. what is the value of y when x=20?

If α,β,γ are the roots of x3+2x2−3x−1=0, then α−2+β−2+γ−2= Explain please?

In a dilution, 10.0 mL of solution X is diluted to 100.0 mL of solution Y?

What is the concentration of methanol in a solution prepared by combining 8.65mL of a 3.669M methanol solution with 16.35mL of water?

For the reaction KOH(aq) --> K+(aq) + OH-(aq) , K = .316. If the concentration of KOH is 4.75M at equilibrium, what is the concentration...?

The addition of HF to 2-butene produces what?

The addition of HF to 2-butene produces what?

Express sin 673 as a trig function of a positive acute angle less than 45? I don't understand how the answer is -cot43 HELP?

If 64.9 g of sodium and 62.3 g of chlorine are used, how many grams of sodium chloride are produced?