chem 115 homework

chem 115 homework - Chem115 (MWF 12:30-1:20) Homework 1...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem115 (MWF 12:30-1:20) Homework 1 Chapter 1, Problem 22 Match each of the numbered items in the list with the numbers in the drop-down menus: Solution- 7 Phase- 5 Mixture- 3 Element- 1 Homogeneous- 6 Heterogeneous- 4 Compound- 2 1. a substance that cannot be broken down into simpler substances by ordinary chemical means 2. a substance formed when two or more elements are combined in the same fixed proportions by mass 3. a physical combination of two or more substances which can have variable composition 4. a combination of two or more substances in which there are two or more phases that differ in properties 5. a homogeneous region within a sample 6. a combination of two or more substances which has the same properties throughout the sample 7. a homogeneous mixture The kind of change needed to separate a mixture into its components is . Chapter 1, Problem 26 Match each of the numbered items in the list with the numbers in the drop-down menus:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
C 7. Carbon Al 4. Aluminum Ni 10. nickel Mg 3. Magnesium Mn 8. manganese N 9. Nitrogen Sn 2. Tin Si 6. Silicon Zn 1. Zinc K 5. Potassium Below are several statements about the element bromine, Br 2 . Which statement describes a chemical property?  Bromine has a density of 3.12 g/mL at 25°C.  The color of bromine is reddish brown.  XX Bromine combines with sodium to form sodium bromide.  Bromine is a liquid with a boiling point of 60°C.  Which of the following is an example of a physical change?  digestion of food  condensation of steam  rusting of iron 
Background image of page 2
Which is the best  match below?  The correct match is (b)  XX The correct match is (c)  The correct match is (a)  The correct match is (d)  The symbols for the elements present in the compound NaHCO 3  are  Na, H, C, and O 3   XX Na, H, C, and O 
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 9

chem 115 homework - Chem115 (MWF 12:30-1:20) Homework 1...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online