A1 States of matter so she set up a) Kristina wanted to provide evidence that matter is made of particles, glass tube as shown below. A white ring formed in the position indicated. Im m cotton wool soaked in concentrated ammonia solution white ring i) Name the compound that makes up the white ring. cotton wool soaked in concentrated hydrochloric acid ii) Name the process occurring in the apparatus and give its definition. Name: Definition: iii) By referring to particles, explain why the white ring formed. Paul measured the lengths of two strips of paw-paw and then placed them in a beaker of water as shown in the diagram below. paw-paw strips distike wate D 13

wu.aleks.com/alekscgi/x/Isl.exe/1o_u-lgNslkr/J8P3)H-lQUHIQg6bJxmeSyVpHOEB1plef9xyC5Ca9QldFNDUsAt.. Tp O STATES OF MATTER 三D Calculating volume percent composition 0/5 A chemist prepares a mixture of ethanol and water at a temperature of 23.0 °C. He measures out 38.5 mL of ethanol and mixes it with 38.2 mL. He measures the volume of the solution after it is well mixed and finds that it is 73.6 mL. The density of ethanol is 079 g/mL and the density of water is 1.0 g/mL. Calculate the volume percent of ethanol in this solution. Be sure your answer has the right number of significant digits. db %(v/) 10 Ar Explanation Check 2022 MGraw Hill LLC All Rights Resurved Terms of Use Prvacy Center Accessibility 9:21 FM 378 /2022 DELL Esc F2 FS F6 F7 FB F10 F11 PrtScr Delete PgUp (PgDn F12 Insert Home End 23 $4 & Num Lock Backspace 7 E R Y P. G K Enter 5 *00

which ones are hete nogeneas mixture orange juice, soil, wine, air, vegetable soup. soil, sayp, or al Ok them? 2 or all Okthem?

. A chemist mixes sodium with water and witnesses a violentreaction between the two substances. This is best classified as a(n):a) observationb) lawc) hypothesisd) theory

Heather has a beaker containing about 200 mL of clear liquid. At the bottom of the beaker she can see some delicate spiny white crystals. Heather asks her A the mixture." Heather chemistry teacher how she might separate the crystals from the liquid. The chemistry teacher says "I think you should says "But I don't know anything about B !" His teacher replies "Don't worry, I'll explain the method. First, you'll need some thick unbleached paper and a funnel..." What are the missing words A and B in this story? A = -0 B S

ion 39 of 43 > Classify these substances. More than one answer may apply in each case. N2 O2 solution homogeneous mixture homogeneous mixture O element pure substance solution compouikd compound element pure substance O heterogeneous mixture heterogeneous mixture N,0 Air (mostly N, and O,) solution solution 10 1037 A étv MacBook Air

If matter is uniform throughout and cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a(n): A) heterogeneous mixture B)compound C) homogeneous mixture E) mixture of elements D) element

A salt water solution is classified as what type of matter? O homogeneous mixture O heterogencous mixture O pure substance O clement O compound

The temperature of an ingot of silver is60°C above room temperature right now. Twenty minutes ago, itwas 70°C above room temperature. How far above room temperaturewill the silver be When will the silver be 10°C above room temperature?

wchich of the following terms descibes what a doctor formswhen treating patients prior to ordering medical test? a) eperiment,b) theory,c) hypothesis,d)law