Which of the following BEST describes the composition of the sun?

the sun is made of exploding iron enriched material.

the sun is made of molten rock.

the sun is made of super heated carbon.

the sun is made of gas.

Calculate the number of iron atoms in 71 grams of iron

Use the born-haber cycle to calculate the lattice energy of kcl. (δhsub for potassium is 89.0 kj/mol, ie1 for potassium is 419 kj/mol, ea1 for chlorine is - 349 kj/mol, the bond energy of cl2 is 243 kj/mol, δh∘f for kcl is - 436.5 kj/mol.)

How can water and gravity work together to erode soil, sediment, and rock

What is the hydronium ion concentration in a solution prepared by mixing 150.00 ml of 0.10 mhcn with 150.00 ml of 0.030 mnacn? assume that the volumes of the solutions are additive and that ka=4.9*10-10.

1. What is the weight of the ethyl alcohol that exactly fills a 200.0 mL container? The density of ethyl alcohol is 0.789 g/mL

Identify eight major tectonics plates by writing their names

How are atoms and elements alike and different?

Define - Solute ...

Calculate the pH of 0.65 M H2SO4 (sulfuric acid) solution? (Ka2: 1.1x10-2)

Ozone reacts completely with NO, producing NO2 and O2. A 13.0 L vessel is filled with 1.30 mol of NO and 1.30 mol of O3 at 401.0 K. Find the partial pressure of each product and the total pressure in the flask at the end of the reaction.