During a laboratory activity to investigate reaction rate, a student reacts 1.0-gram samples of solid zinc with 10.0-milliliter samples of HCl(aq). The table below shows information about the variables in five experiments the student performed.
Experiment
Reaction of Zn() with NCH)
Description of Zine нска) )
Sample Concentration
mos
0.10
powder
0.10
me
0.10
mo
10
powde
10
2
3
Temperature
0
270
270
290
200
20
.
5
Which two experiments can be used to investigate the effect of the concentration of HCl(aq) on the reaction rate?
1.
1 and 3
2
1 and 5
3
4 and 2
4
4 and 3

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.