Answer:
130,000 cubic centimeters
Explanation:
The volume of a box is its length multiplied by its width multiplied by its height (lwh). 423 times 12 times 25 is 126,900. When multiplying, the number of significant figures is the same as the number with the least number of significant figures. The correct number of significant figures in this example is 2, so 126,900 would need to round up to 130,000 in order to have 2 significant figures.
Adding a volatile liquid in the Erlenmeyer flask will increase the total pressure inside the flask. This is because inside the flask, there will be two components: the vapor and the liquid. Each of which will exhibit or exert their own pressure. Thus, the answer to this item should be false.
The mass is 1610 g.
Explanation:
<span>D=<span>MV</span></span>, where D is density, M is mass, V is volume
Known/Given
D=0.921 g/mL
<span>V=1.75 L×<span><span>1000mL</span><span>1L</span></span>=1750 mL</span>
Unknown
M
Equation
<span>D=<span>MV</span></span>
Solution
Rearrange the equation to isolate the mass and solve for mass.
<span>M=D×V=0.921g/mL×1750mL=1611.75 g=1610 g</span> with three significant figures.
The following diagram helps to understand how to manipulate the density equation so solve for any of the variables.
The following Density Triangle will help you determine how to solve
for any missing variable. Put your finger over the missing variable to
see what you need to do to solve for it. For example, if you need to
find volume, put your finger over the V, and you get <span>M÷D</span>.
https://www.teacherspayteachers.com/Product/Science-Journal-Density-Triangle-Foldable-Completed-4360...
The compound Fe2O3 contains C) 5 total atoms.
This is because there are 2 atoms of Fe (iron) and 3 atoms of O (oxygen) bonded together in this compound, as denoted by the subscripts, and 2+3 = 5.
Hope this helps!