Which can be used as an indicator of past climate?

Lets say you were doing an experiment on two different chemicals in two different test tubes. One chemical is giving off oxygen gas or hydrogen gas the other is giving off carbon dioxide gas.

What can be said about the spontaneity of the reaction at 298 k?

If an ice cube melts at 0ºC but water also freezes at 0ºC, what is the difference between melting and freezing in terms of ... 8. The energy involved in the phase changes and 9. The motion of the particles of the substances during the phase changes?

What is the independent variable of the sentence "if diet affects weight, then people who eat less will lose weight."?

Mention two instruments that could be used to transfer sodium hydroxide solution into conical flask

Which molecule is a dipole? CH4 N2 CCl4 NO2 BF3

Calculate the enthalpy of the formation of butane, C4H10, using the balanced chemical equation and the standard value below: 4C (s) + 5H2 (g) = > C4H10 (g) Standard enthalpy of formation values: (Delta Triangle) H^0 of C (s) = - 393.

What volume of lead (of density 11.3 g/cm3) has the same mass as 330 cm3 of a piece of redwood (of density 0.38 g/cm3) ?

What electrically neutral atom will have an electron configuration of 1 s 22 s 22 p 4? Use a periodic table. Question 5 options: nitrogen (N) oxygen (O) carbon (C) fluorine (F)

How many grams of hydrogen are in 46 g of CH4OH? Answer is 6.97