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4 years ago

Describe the conversion between potential and kinetic energy that occur when you shoot a basketball at a basket.

Chemistry

1 answer:

Alina [70]4 years ago

3 0

Just standing there potential when you release it then you have kinetic energy

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A _____________ is a reagent that protects a component of the analyte from reaction with edta.

zepelin [54]

The answer is masking agent

4 0

2 years ago

Cu + 2AgNO3 → Cu(NO3)2 + 2Ag

Eva8 [605]

Answer:

$m_{Ag}=135.8gAg$

$Y=88.4\%$

Explanation:

Hello there!

In this case, according to the described chemical reaction, it is possible to compute the theoretical mass of silver as mass via the 1:2 mole ratio of copper to silver and their atomic mass in the periodic table, in order to perform the following stoichiometric setup:

$m_{Ag}=40.gCu*\frac{1molCu}{63.55gCu}*\frac{2molAg}{1molCu}*\frac{107.87gAg}{1molAg}\\\\ m_{Ag}=135.8gAg$

Next, given the actual yield of 120 g, we compute the percent yield via:

$Y=\frac{120g}{135.8g}*100\%\\\\Y=88.4\%$

Regards!

4 0

3 years ago

How much heat is required to heat 5.25 g of water h2o from 5.5?

Evgen [1.6K]

Heat = mass * heat capacity of water * change in temperature mass = 5.25 g heat capacity of water = 4.186 joule/gram °C Change in temperature = 62.8°C - 5.3°C = 57.5 °C Plug in the values heat = 5.25 g * 4.186 joule/gram °C * 57.5 °C = 1263.6 J Rounded to two three significant figures, it is 1260 J of energy needed. In terms of calories, the heat capacity of water is 1 calorie/gram °C. So do the plugging in all over again. mass = 5.25 g heat capacity of water = 1 calorie/gram °C Change in temperature = 62.8°C - 5.3°C = 57.5 °C heat = 5.25 g * 1 calorie/gram °C * 57.5 °C = 301.9 calories Rounded to 3 significant figures, it is 302 calories Q=SM∆T=4.18*5.25*(62.8-4.3)=1280 J 1280 J * (1 cal/4.18 J) = 307 cal

5 0

3 years ago

A solution is made by mixing equal masses of methanol, CH 4 O , CH4O, and ethanol, C 2 H 6 O . C2H6O. Determine the mole fractio

wariber [46]

Answer: The mole fraction of methanol

Xmeth= 0.59

The mole fraction of ethanol

Xeth = 0.41

Explanation:

Mole fraction of a component can be determined by:

Xi = moles of i / total moles of the components the components

Where i indicates the component

An equal mass of 100.0g is assumed for both methanol and ethanol

Molar mass of Methanol (CH4O)

= (1*12) + (4*1) +(1*16) =32g/mol

Mole of Methanol = mass of methanol /molar mass of methanol

=100/32 = 3.13mol.

Molar mass of ethanol ( C2H6O)

= (2*12)+(6*1)+(1*16) = 46.0g/mol

Mole of ethanol = 100/46

= 2.17mol.

Mole fraction of methanol (Xmeth)

= moles of methanol / total moles

Xmeth = 3.13/(3.13+2.17)

Xmeth = 0.59

Mole fraction of ethanol (Xeth)

= moles of ethanol /total moles

= 2.17/((3.13+2.17)

Xeth= 0.41

5 0

3 years ago

Really need help:<br> A dry mixture of water soluble KNO3 and sand could be seperated by _______?

Tanzania [10]

Answer:

Explanation:

When you add the water, KNO3 will be in solution, but sand is not soluble.

So, we can use filtration.

8 0

3 years ago

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