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3 years ago

Where on a bicycle might you find a pulley?

Chemistry

2 answers:

Akimi4 [234]3 years ago

8 0

I would say the chain rings

Lunna [17]3 years ago

3 0

I agree.
The chain rings...
I guess you could perhaps include pedals as well because they are attached to the gears and the help the chain move.
However pedals are mostly classified as lever.

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In the laboratory, a student dilutes 13.5 mL of a 11.6 M hydroiodic acid solution to a total volume of 100.0 mL. What is the con

igomit [66]

Answer: The concentration of the diluted solution is 1.566M.

Explanation:

The dilution equation is presented as this: $M_{s} V_{s} =M_{d} V_{d}$ .

·M= molarity (labeled as M)

·V= volume (labeled as L)

·s= stock solution (what you started with)

·d= diluted solution (what you have after)

Now that we know what each part of the formula symbolizes, we can plug in our data.

$11.6M*13.5mL=M_{d} *100mL$

We cannot leave it like this because the volumes must be in Liters, not milliliters. To convert this, we divide the milliliters by 1000.

$13.5mL/1000=0.0135L$ $100mL/1000=0.1L$

Now that we have the conversions, let's plug them into the equation.

$11.6M*0.0135L=M_{d} *0.1L$

The only thing that we need to do now is actually solving the answer.

$M_{d} =\frac{11.6M*0.0135L}{0.1L}$ $M_{d} =1.566M$

From the work shown above, the answer is 1.566M.

I hope this helps!! Pls mark brainliest :)

7 0

1 year ago

Find square root of 423.74 on two place of decimal

vekshin1

20.58 by using a calculator you can determine this, then round

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3 years ago

At a certain temperature, the solubility of strontium arsenate, Sr3(AsO4)2, is 0.0540 g/L. What is the Ksp of this salt at this

blondinia [14]

<span>Get into moles first. .0590 grams over 540.8 grams per mole = 1.09 x l0^-4 moles

Sr3(As04)2 = 3 Sr++(aq) plus 2 As04^-3(aq)

Ksp = (Sr++)^3(As04^-3)^2

(Sr++) = 3 X l.09 x l0^-4 = 3.27 x l0^-4

(As04^-3) = 2 x l.09 x l0^-4 = 2.18 x l0^-4

<span>Ksp = (3.27 x l0^-4)^3 (2.18 x l0^-4)^2 which equals 1.66 x 10^-18th

I hope my answer has come to your help. Thank you for posting your question here in Brainly.</span></span>

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3 years ago

A 0.0884 M solution of a weak base has a pH of 11.79. What is the identity of the weak base?Weak Base KbEthylamine (CH3CH2NH2) 4

iVinArrow [24]

Answer:

The base must be ethylamine.

Explanation:

The pH of solution of a weak base gives us an idea about the Kb of the base.

$pOH=14-pH$

$pOH=14-11.79=2.21$

$pOH=-log[OH^{-}]$

$[OH^{-}]=0.0062M$

The relation between Kb and hydroxide ion concentration is:

$Kb=\frac{[OH^{-}]^{2}}{[base]}$

$Kb=\frac{0.0062X0.0062}{0.0884}=4.34X10^{-4}$

Thus the weak base must be ethylamine.

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3 years ago

What is the definition of lava?

Tanzania [10]

Answer:

Lava, magma (molten rock) emerging as a liquid onto Earth's surface. The term lava is also used for the solidified rock formed by the cooling of a molten lava flow.

Explanation:

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2 years ago