1. For test tubes 1-5, list the entities initially present. Also, identify the SOA and SRA and predict the spontaneity of the reaction. 

test tube 1: Iron placed in distilled water

Test tube 2: Iron is placed in hydrochloric acid

Test tube 3: Iron is placed in magnesium

Test tube 4: Iron is placed in saltwater

Test tube 5: Iron is placed in de-aerated water

Test tube 6: Iron alone (controlled)

2. Using the SOA and SRA identified in Question 17, write the oxidation and reduction half-reactions and the net reaction for systems 2 and 4.

3. Explain why there was accelarated corrosion in test tube 3

4. Explain why the nails did not corrode in test tubes 4 and 5.

Do the four chromatids on a tetrad in meiosis 1 have different alleles?

if you were to jumo on a bathroom scale, explain how the scale reading would change before it settles to read your actual weight. Use newtons second law to justify what happens. 

i need help with this question please I'm really confused i need it by tomorrow. I'm desperate.

what is the radius of the earth orbit around the sun if it takes 365.25 days to complete one full orbit?(mass or sun 1.99x10^30 and ,mass of earth 5.97 x 10^24kg.

what is FC equal to?

replace FC with a formula and replace fg with newtons equation for gravity ?

solve for r

can you please show me the procedure so i can do it on my own thank you 

how to write a position paper

I need help with this question please I don't understand, I need it by tomorrow please I'm desperate.

find the these

..... how do I find the net force with on the 1000kg satellite, if the distance from the center earth to the moon is 384 00km, and the mass of the moon is 7.36 × 10^22 kg when the satellite is halfway between them

... how do i find the acceleration of gravity  (grevitational field strength) happening on a Russian Space Monkey orbiting the Earth 250km above the surface of the Earth.

also, can someone tell me how to find the tension? ex.having 10 mass (uk=0.55) and 3.5m/s^2

please show the procedure so I can do it on my own once again. thanks a lot

While travelling at a constant speed in an airplane, a passengers weight is 750 N, when the airplane accelerates down, his apparent weight is 672 N. What is the acceleration???

    Hydrazine, N₂H₄(aq), is used in the preparation of polymers, pharmaceuticals and rocket fuel.  Hydrazine has alkaline properties similar to ammonia and will act as a weak base.  Given that a 100 mL sample of 0.10 mol/L hydrazine solution has a pH of 10.55 at 25.0 ^oC, write the formula for the conjugate acid and calculate the Ka of the conjugate acid.