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3 years ago

2. Imagine you have just baked a pizza in the oven. You've only let it cool for a minute, but you're

Chemistry

1 answer:

GaryK [48]3 years ago

3 0

Answer:

You should take a bite near the crust that contains very little sauce.

Explanation:

Specific heat capacity is amount of heat a one gram of substance must absorb or lose to change its temperature by one degree Celsius.

The sauce has water in it. Water has a high high heat capacity,( i.e 4.186 J/g °C, ) which means that the sauce takes more time to cool, as a result the sauce is still be hot even after few minutes of cooling, as compared to crust which has less sauce so it will cool faster.

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AlekseyPX

Answer:

Physical changes are when the object can be returned back into their original form. Chemical changes are when the object gets changed and can't get reversed.

Explanation:

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5 0

3 years ago

Suppose that magnesium would react exactly the same as copper in this experiment. how many grams of magnesium would have been us

Vikentia [17]

The solution for this problem would be:

We are looking for the grams of magnesium that would have been used in the reaction if one gram of silver were created. The computation would be:

1 g Ag (1 mol Mg) (24.31 g/mol) / (2mol Ag)(107.87g/mol) = 0.1127 grams of Magnesium

6 0

3 years ago

2. The volume of a rock is 5 cm' and its mass is 50 g. Find the density.<br> pls help :)

Vladimir [108]

Answer:

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume}\\$

From the question we have

$density = \frac{50}{5} = 10 \\$

We have the final answer as

Hope this helps you

5 0

3 years ago

Which of the following statements is incorrect?

yarga [219]

The correct option is D.
Mole is a measurement used in chemistry which allows us to measure out the same quantity of matter in different substances. Mole allows scientist to measure two substances, for instance, magnesium and sodium, which have equal amount of atoms. Thus, a mole of magnesium contains the same number of atoms as a mole of sodium.

4 0

3 years ago

A standard solution is prepared for the analysis of fluoxymesterone (C20H29FO3), an anabolic steroid. A stock solution is first

VLD [36.1K]

Answer:

The final solution has a concentration of 5.95 * 10^-6 M

Explanation:

<u>Step 1:</u> data given

Mass of fluoxymesterone : 10mg = 0.01g

Molar mass of fluoxymesterone = 336g/mole

Volume = 500 mL =0.5 L

<u>Step 2:</u> calculate Concentration of fluoxymesterone

Concentration = mole / volume

⇒ To find the concentration, we first need to find the number of moles

⇒moles fluoxymesterone= mass of fluoxymesterone / Molar mass

0.01g / (336g/mole) = 2.976 *10^-5 mole

C = 2.976 *10^-5 mole / 0.5 L = <u>5.95 * 10 ^-5 M</u>

<u>Step 3:</u> Calculate dilution

⇒ If 10 mL is diluted to 100 ml then this is a 10x dilution (100 ml /10 ml = 10) so the final solution will be 10 x more dilute.

⇒5.95 * 10^-5 M /10 = 5.95 ^* 10^-6 M

We can control this through the following formula: M1 * V1 = M2 * V2

5.95 *10^-5 * 10 * 10 *^-3 = M2 *0.1 L

M2 = 5.95 * 10^-6 M

6 0

4 years ago