CHEMISTRY HIGH SCHOOL

The amount by which a machine multiplies an effort force is called ____.a. efficiency factor
b. fulcrum
c. mechanical advantage
d. resistance force

Answers

Answer 1
Answer: c. mechanical advantage 
Answer 2
Answer:

Answer:

Mechanical Advantage

Explanation:

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5. Which quantities must be conserved in all chemical reactions?
The adrenal glands respond to______
The compound known as butylated hydroxytoluene, abbreviated as BHT, contains carbon, hydrogen, and oxygen. A 1.376 g sample of BHT was combusted in an oxygen rich environment to produce 4.122 g of CO 2 ( g ) and 1.350 g of H 2 O ( g ) . Insert subscripts to complete the empirical formula of BHT.
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How many moles is 125 g CuO2?

Answers

Answer:

1.31moles

Explanation:

Given parameters:

Mass of CuO₂  = 125g

Unknown:

Number of moles  = ?

Solution:

To solve this problem, we use the expression below:

   Number of moles  = (mass)/(molar mass)  

Molar mass of CuO₂  = 63.6 + 2(16) = 95.6g/mol

So;

 Number of moles  = (125)/(95.6)   = 1.31moles

Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1."Al + HCl → AlCl3 + H2

Answers

The balanced equation is:

2Al + 6HCl -> 2AlCl3 + 3H2

There are 2 Al, 6H, and 6 Cl making the equation balanced and if you need the coefficients in order it is: 2,6,2,3

Answer:

2Al + 6HCl -> 2AlCl3 + 3H2

Explanation:

Please show step by step and I will mark you as brainliest answer ❤️​

Answers

Answer: The pH of the solution is 13.

Explanation:

pOH is defined as the negative logarithm of hydroxide ion concentration present in the solution.

pOH=-\log [OH^-]

We are given:

Concentration of Ca(OH)_2=0.05mol/dm^3=0.5mol/L          (Conversion factor: 1L = 1dm^3 )

1 mole of calcium hydroxide produces 1 mole of calcium ions and 2 moles of hydroxide ions

Concentration of OH^-=(2* 0.05)=0.1mol/L

Putting values in above equation, we get:

pOH=-\log (0.1)\n\npOH=1

We know:

pH+pOH=14\n\npH=14-1\n\npH=13

Hence, the pH of the solution is 13.

The temperature of a sample of water increases from 20 degrees Celsius to 46.6 degrees Celsius as it absorbs 5650 calories of heat. What is the mass of the sample

Answers

ΔT = 46.6 - 20

ΔT = 26.6ºC

Specific heat of water is 1.0 cal/g °C

Q = m * C * ΔT 

5650 = m * 1.0 * 26.6

5650 = m * 26.6

m = 5650 / 26.6

m = 212.4 g

hope thips helps!

Please help me fill this all out! (Will give brainliest and a heart) This has to do with the fight or flight response.

Answers

Being at the beach: Joyous, thrilled - Smiling, jumping (for joy)
Seeing a tornado nearby: Terror, despair - Crying, shaking
Crossing paths with a grizzly bear: Doom, hopelessness - Frozen, sweating
Skydiving: Anxious, excited - Fidgeting, nervous laughter
Noticing a suspicious figure...: Suspicious, frightened - Observing, running
Seeing a neighbors house on fire: Pity, distress - Frowning, shaking
Seeing two dogs..: Affectionate, happiness - Smiling, giggling
Receiving money: Surprised, relieved - Jumping for joy, crying

Fight or flight response, tornado, grizzly bear, fire, suspicious figure, - maybe skydiving if you chicken out?

These are all opinions though hopefully this helps.

How are proteins, carbohydrates, and fats related to the discipline of chemistry?

Answers

can you explain what you're looking for
*food science* 
When you consume proteins, carbs, and fats they are chemically changed into energy. 
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