Correct Answers 2025
What ,is ,the ,definition ,of ,a ,scientific ,theory? ,- ,CORRECT ,ANSWER-a ,model ,that
,explains ,the ,underlying ,reasons ,for ,observations ,and ,laws
What ,term ,best ,describes ,a ,brief ,statement ,that ,summarizes ,many ,past ,observations
,and ,predicts ,new ,ones? ,- ,CORRECT ,ANSWER-scientific ,law
Which ,of ,the ,following ,is ,an ,example ,of ,a ,scientific ,law? ,- ,CORRECT ,ANSWER-In ,a
,chemical ,reaction, ,matter ,is ,neither ,created ,nor ,destroyed.
Which ,of ,the ,following ,would ,be ,considered ,a ,theory? ,- ,CORRECT ,ANSWER-Helium
,balloons ,float ,because ,helium ,is ,less ,dense ,than ,air.
The ,key ,to ,success ,in ,chemistry ,is: ,- ,CORRECT ,ANSWER-all ,of ,the ,above
A ,plastic ,block ,has ,dimensions ,of ,2.2 ,cm ,x ,3.0 ,cm ,x ,1.5 ,cm ,and ,a ,mass ,of ,12.4
,grams. ,Will ,the ,block ,float ,in ,water ,and ,why? ,- ,CORRECT ,ANSWER-No, ,because
,the ,density ,of ,the ,block ,is ,1.3 ,g/mL ,which ,is ,greater ,than ,the ,density ,of ,water.
Given ,the ,density ,of ,Au ,is ,19.3 ,g/cm3, ,determine ,the ,mass ,of ,gold ,(in ,grams) ,in ,an
,ingot ,with ,the ,dimensions ,of ,10.0 ,in ,x ,4.00 ,in ,x ,3.00 ,in. ,- ,CORRECT ,ANSWER-3.80
,x ,104
The ,distance ,between ,the ,two ,hydrogen ,atoms ,in ,a ,molecule ,of ,water ,is
,0.000000000172 ,m. ,Express ,this ,distance ,in ,scientific ,notation. ,- ,CORRECT
,ANSWER-1.72 ,x ,10-10 ,m
How ,many ,grams ,are ,in ,1.48 ,x ,107 ,μg? ,- ,CORRECT ,ANSWER-14.8
The ,correct ,decimal ,representation ,of ,6.453 ,x ,103 ,is: ,- ,CORRECT ,ANSWER-6,453
How ,many ,significant ,digits ,should ,be ,reported ,in ,the ,answer ,to ,the ,following
,question?
, (4.3-3.7) ,x ,12.3= ,- ,CORRECT ,ANSWER-1
The ,correct ,scientific ,notation ,for ,the ,number ,0.00050210 ,is: ,- ,CORRECT ,ANSWER-
5.0210 ,x ,10-4
Which ,measurement ,below ,represents ,the ,heaviest ,mass? ,- ,CORRECT ,ANSWER-1
,Mg
Determine ,the ,answer ,to ,the ,following ,equation ,with ,correct ,number ,of ,significant
,figures:
2.02+8.102-0.0297= ,- ,CORRECT ,ANSWER-10.09
A ,lead ,ball ,has ,a ,mass ,of ,55.0 ,grams ,and ,a ,density ,of ,11.4 ,g/cm3. ,What ,is ,the
,volume ,of ,the ,ball? ,- ,CORRECT ,ANSWER-4.82 ,mL
When ,the ,value ,4.449 ,is ,rounded ,to ,two ,significant ,figures, ,the ,number ,should ,be
,reported ,as: ,- ,CORRECT ,ANSWER-4.4
The ,correct ,number ,of ,significant ,figures ,in ,the ,number ,865,000 ,is: ,- ,CORRECT
,ANSWER-ambiguous
How ,many ,inches ,are ,in ,2.80 ,ft? ,- ,CORRECT ,ANSWER-33.6
Which ,of ,the ,following ,would ,NOT ,be ,considered ,a ,correct ,conversion ,factor? ,-
,CORRECT ,ANSWER-1 ,pair ,of ,shoes ,= ,1 ,shoe
Suppose ,a ,boat ,engine ,leaks ,938 ,mL ,of ,oil ,into ,a ,lake. ,The ,mass ,of ,this ,spilled ,oil ,is
,823 ,g. ,The ,oil ,will ,not ,mix ,with ,the ,lake ,water. ,Which ,statement ,is ,true? ,- ,CORRECT
,ANSWER-The ,oil ,will ,float ,because ,its ,density ,of ,0.877 ,g/mL ,is ,less ,than ,the ,density
,of ,water.
Which ,state ,of ,matter ,has ,indefinite ,shape ,and ,is ,compressible? ,- ,CORRECT
,ANSWER-gas
A ,solution ,is ,an ,example ,of ,a ,(an): ,- ,CORRECT ,ANSWER-homogeneous ,mixture
Which ,of ,the ,following ,is ,NOT ,an ,example ,of ,a ,physical ,property? ,- ,CORRECT
,ANSWER-Water ,can ,form ,hydrogen ,and ,oxygen ,under ,electrolysis ,conditions.
Which ,of ,the ,following ,is ,a ,homogeneous ,mixture? ,- ,CORRECT ,ANSWER-stainless
,steel
When ,methane ,is ,burned ,with ,oxygen ,the ,products ,are ,carbon ,dioxide ,and ,water. ,If
,you ,produce ,36 ,grams ,of ,water ,and ,44 ,grams ,of ,carbon ,dioxide ,from ,16 ,grams ,of
,methane, ,how ,many ,grams ,of ,oxygen ,were ,needed ,for ,the ,reaction? ,- ,CORRECT
,ANSWER-64