Answer:
Explanation:
Ionic Compounds Are Balanced
Table salt is an example of an ionic compound. Sodium and chlorine ions come together to form sodium chloride, or NaCl. The sodium atom in this compound loses an electron to become Na+, while the chlorine atom gains an electron to become Cl-
The turkey limits bc you can make 9 sandwiches with 9 turkey and 12 sandwiches with 25 bread
Pure substances is matter that cannot be separated into any other matter. Mixtures are a compound of different matter, and can be separated into different matter. Pure substances have a constant chemical properties, while mixtures have varying chemical properties.
Answer:
- <u><em>Last choice: 109.729 g</em></u>
Explanation:
This is a combustion reaction. The complete combustion of a hydrocarbon produces carbon dioxide and water.
The combustion reaction of<em> isopropyl alcohol</em> is represented by the balanced hemical equation:
Thus, 2 moles of produce 8 moles of .
<u>1. Convert the 91.5 g of isopropyl alcohol into number of moles</u>
- Number of moles = molar mass / fomula mass
- Number of moles = 91.5g / (60.95592g/mol) = 1.52256692 mol
<u>2. Calculate the the number of moles of water produced using the mole ratio:</u>
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<u>3. Convert to mass of water</u>
- Mass = number of moles × molar mass
- Molar mass = 2 × 1.00794 g/mol + 15.9994g/mol = 18.01528g/mol
- Mass = 6.0902637 mol × 18.01528 g/mol = 109.717806g ≈ 109.72 g
So far, I have kept a large number of digits because these are intermediate calculations.
You should report the result with 3 significant figures, but all the answer choices contain more than that.
The last choice, 109.729, is the closest to the correct value.
The four satellites are needed to determine the location of an object using a GPS receiver.
<u>Option: </u>B
<u>Explanation:</u>
A GPS receiver specifically calculates the different speed of light (299,792 km / s) variations in the signals arriving from 4 or more satellites to determine the location of Longitude, Latitude and Highness.
There is requirement of four satellites, since each satellite data brings around the satellite in a sphere. You can limit the considerations down to a single point by programming the crossings. The collision of three satellites positions you on two possible points. The last satellite shows you exactly where you are.