Airbags are good for car crashes and have saved lots of life’s, the force of the airbags are dangerous though because they come out with fast acceleration and when it is hot it can burn you. If there is ever a time for collision airbags may save your live!
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Answer:
Antifreeze
Explanation:
That sounds like a contradiction, doesn't it?
Antifreeze lowers the freezing point of the water in your car's cooling system.
It also raises the boiling point and protects against boil overs.
A 50:50 mixture of ethylene glycol/water boils at 106 °C (223 °F). If the car radiator has a 100 kPa (15 psi) cap, the boiling point increases to 126 °C (258 °F).
Answer:
Explanation:
We are asked to convert 1.45 moles of potassium hydroxide (KOH) to grams.
<h3>1. Molar Mass</h3>
The molar mass is the mass in grams of 1 mole of a substance. The values are found on the Periodic Table. They are the same as the atomic masses but the units are grams per mole (g/mol) instead of atomic mass units (amu).
We have the compound KOH. Look up the molar masses of the individual elements.
- Potassium (K): 39.098 g/mol
- Oxygen (O): 15.999 g/mol
- Hydrogen (H): 1.008 g/mol
The formula for the compound has no subscripts, so there is 1 mole of each element in 1 mole of the compound. We can simply add the molar masses.
- KOH: 39.098 + 15.999 + 1.008 =56.105 g/mol
<h3>2. Convert Moles to Grams</h3>
Based on the molar mass, there are 56.105 grams of KOH in 1 mole. Create a ratio using this information.
We are converting 1.45 moles of KOH to grams, so we multiply by this value.
The units of moles of KOH cancel.
<h3>3. Round </h3>
The original measurement of moles has 3 significant figures, so our answer must have the same.
For the number we calculated, that is the tenths place. The 5 in the hundredths place (81.3<u>5</u>225) tells us to round the 3 up to a 4.
<u>Approximately 81.4 grams of potassium hydroxide </u>are represented by 1.45 moles.
Answer:
4.444... m/s
Explanation:
Because it increases by 40 m/s in 9 seconds so 40/9= 4.444... m/s