Which of the following indicates a chemical change?

Question 7 options:

A. an exploding firecracker

B. a freezing ice cube

C. wood breaking into splinters

D. a wire conducting electricity

6.7 mL of a ptassium chlorid solution was added to a 54.730 gevaporating dish. The combination weight 61.945 g. Afterevaporation the dish contents weight 55.428 g. a. What was the mass percent of potassium chloride in thesolution? b.

What substance has the highest molar mass?

How many electrons does ga lose to achive noble gas arrangement?

Imagine you could observe the individual atoms that make up a piece of matter and that you observe the motion of the atoms becoming more orderly. what can you assume about the system

Explain why c6h5ch2ch2br is not formed during the radical bromination of c6h5ch2ch3. select the single best answer.

Is the compound CO ionic or covalent

What is the volume in ml of one pound of mercury?

How does the number of molecules in one mole of carbon dioxide compare with the number of molecules in one mole of water? A. There are four times as many molecules in one mole of carbon dioxide as there are in one mole of water. B.

Suppose you had 1.0 mol samples the following gases at STP. If the volume of each of the samples of gas was reduced to one tenth of its original size and the temperature remained the same, which gas would have the lowest pressure?

What happens when the silvered coin is put on the flame