Cards in this guide (10)
If a sample of gas occupies 20 ml at -132 C what volume does the sample occupy at 50 C
Which of the following indicates that a chemical change has happened during cooking a The food darkens b Bubbles form in boiling water c Butter melts d Energy is transferred from the stove to a pan
What do you multiply 340 grams by to convert it to kilograms
What is the formula for table surgar
Why does the density of a substance not change with the sample size
Density = mass / volume
As sample size increases, both mass and volume increase in the
same ratio.
What is the percentage of a mixture homogeneous
A homogeneous mixture is 100% homogeneous.
What is the result of multiplying 2.5 x 1010 by 3.5 x 10-2
2.5 x 1010 x 3.5 x 10-2 = 88.375
What is a physical change strawberries left out to mold strawberries cooked into jelly Or strawberries liquefied in a blender
- mold: biochemical change as the fungus digests and eats the berries
- cooked: chemical change as heat triggers hydrolysis of proteins and starches in the berries
- blended: physical as blender blades chop the berries into puree
If the particles of matter that make up a substance are relatively far apart and can move freely the substance is in a state.