Consider the following data on some weak acids and weak bases: name acetic acid hypochlorous acid HCIO 0.1 MKC 0.1 M NaCH₂CO₂ acid solution 0.1 MCNH C Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a 2 next to the solution that will have the next lowest pH, and so on. 0.1 MKCIO formula HCH,CO₂ 1.8x10 3.0 × 10 K X PH choose one choose one choose one base choose one K₂ name formula aniline CH₂NH₂ 43×10 10 pyridine C,H,N 1.7×10 &

caloulate the mass Of es formed whn 9.42 of Fe reacts with 8.505 okS Fe Cs) +2S cs= FeSzcs) a.) 87.95 e.) 26.0) (.) 40.4

explain

Kk.235.

The elements of the periodic . Table can be divided into main categories? (A) 3 (B) 5 (C) 4 (D) 2

During World War II, physicists developed methods to separate the uranium-235 and -238 isotopes. One method involved converting the uranium metal to a gas, UF6, and then allowing the gas to diffuse through a porous barrier, with the lighter gas diffusing faster. What is the difference in the speeds of the two UF6 gas species at room temperature?

Choose the correct answer. The difference between the massnumber of an isotope and its atomic number is (a) directlyrelated to the identity of the element; (b) the number of electrons;(c) the number of neutrons; (d) the number of isotopes

Is 1s22s22p6 the symbol for a macroscopic property or a microscopic property of an element? Explain your answer.

Hi, can someone pls tell me if these answers are correct and help me find the answers to the ones I didn't know, thanks ?

16) What's the atomic number of sulfur-34 ? A) 34 B) 18 C) 16 17) In the formula of hydroxylapatite Cano(PO4)6(OH), determine the number of each kind of atom, Ca, O, H, P: A) Ca – 10; O – 8; H – 2; P - 6 с) Са — 10; О —12;B Н — 2;B Р - 6 в) Cа — 10; О — 26;B Н — 23B Р - 6 D) Ca – 10; O – 26; H – 2; P - 1 18) Which element is represented by the chemical symbol TI ? A) tantalum B) thorium C) thallium 19) The fact that water is 11.2 % hydroen and 88.8 % oxygen by mass regardless of its origin is an example of B) law of conservation of mass C) law of definite proportions A) Dalton's atomic theory