Jane in the stockroom counted all of the 400 mL beakers. After counting twice she came up with 857 beakers both times. How many significant figures are in the number of counted beakers? Select one: 136 857 400 infinity

A 2.5 L canister under a pressure of 150 kPa at 20 °C is compressed to a volume of 1.5 L at 35 °C. What is the resulting pressure? K H Li Be Na Mg "K Ca Sc Ti V Cr Rb Cs Fr Ba Ra La La 158.2 kPa 329.3 kPa 56.8 kPa 180.3 kPa 98.3 kPa 262.8 kPa M 89-108 104 M Hf Ta Ac Metal Rf Db Sg Periodic Table of the Elements W Re Os A He Aline TH Symbel 41 42 M45 Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Basic 13 IKA LAS B Pt MAN 14 VE 15 AI Si P 17 VILA Cl w! Mn Fe Co NI Cu Zn "Ga Ge As Se Br Kr Neble LIONS Au Hg Tl Pb Bi Po At Rn 108 10 Sg Bh Bh Hs Mt Ds Rg Cn Uut "FI Uup "Lv Uus Uuo VIA He Ne 18 Yb Lu Pa U Np Pu Am Cm Bk Cf Es Fm Md No Ar

3. Standard white vinegar you can buy in the grocery store is 5% concentration. That means 5% of the liquid vinegar is acetic acid and 95% of the solution is water. In a hardware store, you can buy industria strength vinegar, which is 30% concentration. This means that 30% of the vinegar is acetic acid, and the remaining 70% is water. Samuel does another experiment, this time with 5% vinegar and 30% vinegar. He sets up two science fair volcanoes (in no particular order), each with the same temperature, mass of baking soda and volume o vinegar. But one volcano uses 5% vinegar and the other volcano uses 30% vinegar. He measures the volume of gas production for the'first minute of each reaction, and he records the data below. Volcano # 1 Volume of gas produced (mL.) vs. Time (s) for Volcano #1 Time Volume of gas (s) produced (ml) 60 E 50 10 20 30 25 8 40 38 46 30 20 Volume of gas produced (ml) 40 50 50 60 52 of 10 53 20 40 60 80 Time (s) Volcano # 2 Volume of gas Volume of gas produced…

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