A gas absorbs 3.4 kJ of heat and does 1.9 kJ of work. Calculate ΔE

A neutral atom whose electron configuration is 1s² 2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶ is a. Highly reactive b. A noble gas c. A positively charged ion d. A transition metal e. A lanthanide element

Which is acceptable when using powered tools?

When balancing a chemical equation do the subscripts move with the element or stay? would this example be right or wrong? Ba (NO₃) ₂+Na₂SO₄⇒BaSO₄+Na₂ (NO₃) ₂ this already looks balanced so what am I doing wrong?

1.) Which color is absorbed and which is reflected by the leaves of most plants?

Hydrazine, N2H4, reacts with dinitrogen tetroxide, N204. 2 N HAO + N20 (g) - 4 H20 (1) + 3 N, (g) When 0.10 mol of hydrazone reacts with 0.

At 25°C 12 M H202 is decomposed after 30 minutes the concentration of the H2O2 is found to be 9.5 M what is the average reaction rate for this decomposition reaction.

Give an example of a solution that can be seperated by simple distilation.

What is the h + concentration for an aqueous solution with poh = 3.35 at 25 ∘c? express your answer to two significant figures and include the appropriate units?

What information does a phase diagram give

Which cell structures function like power plants for plant or animal cells? A. nuclei B. vacuoles C. ribosomes D. mitochondria