初二一道科学题
1)4毫升×1克/毫升= 4克
a%=1/4×100%=25%
2)0.1毫升* 1克/毫升= 0.1克
1毫升* 1克/毫升= 1克
b % = 0.1g * 25%/1g = 2.5%
c % = 0.1g * 2.5%/1g = 0.25%
d%=0.2g*0.25%/1g=0.05%
3)1克/0.05% = 2000克
2000克/1克/毫升= 2000毫升
a%=1/4×100%=25%
2)0.1毫升* 1克/毫升= 0.1克
1毫升* 1克/毫升= 1克
b % = 0.1g * 25%/1g = 2.5%
c % = 0.1g * 2.5%/1g = 0.25%
d%=0.2g*0.25%/1g=0.05%
3)1克/0.05% = 2000克
2000克/1克/毫升= 2000毫升