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3 years ago

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Vesna [10]3 years ago

4 0

From Q = mcΔΤ, the specific heat capacity, c, of the metal that was cooled is c = Q/mΔT = (-769 J)/(46.4 g)(30.0 °C - 101.0 °C) = 0.233 J/g °C. From the table, it appears that this is the specific heat capacity of silver. So, the metal is most like silver.

Note: The value for Q was written as a negative value in the equation as heat energy was given off by the metal when the metal was cooled (from the metal’s point of view, it’s losing heat energy).

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How many moles of solute are contained in a 500.0 milliliter solution that has a concentration of 0.35 M?

RUDIKE [14]

I think the answer you are looking for is .18 moles

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3 years ago

Read 2 more answers

How many grams of NaNO3 would have to be added to 100. grams of water at 45°C to make a saturated solution of this salt? 1. 100.

denis-greek [22]

Answer:

2. 110.

Explanation:

Kindly find the attached image.

From the solubility curve, you can find that at 45°C to make a saturated solution of this salt, you should add 110 g of NaNO₃.

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3 years ago

el diametro de la tierra en el ecuador es de 7926381 ml. redondee este numero a tres cifras significativas y expresel en notcion

elena55 [62]

7.93 x 10⁶mi

Explanation:

Significant figures are numbers that shows how accurate and precise scientific measurements are reported.

Here are some rules to identifying them;

All non-zero digits are significant
zeros between digits are significant
leading zero before a decimal are not significant
trailing zero after a decimal are significant
trailing zero before a decimal point are significant.

The number 7926381 has 7 significant numbers.

To write in the scientific notation, we simply express as N x 10ᵃ

N is the number of significant number

a is the exponent

N here is 7.93

a here is 6

7.93 x 10⁶mi

learn more:

Significant figures brainly.com/question/2746374

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3 years ago

The density of water at 400C is 0.992 g/mL What is the volume of 27.0 g of water at this temperature?

pantera1 [17]

Answer:

Volume of water at this temperature is 27.2 mL

Explanation:

We know that $density=\frac{mass}{volume}$

Here density of water is 0.992 g/mL

Here mass of water is 27.0 g

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

= $\frac{27.0g}{0.992g/mL}$

= 27.2 mL

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4 years ago

A property of matter that can be observed without changing the matter into a new substance is known as ___.

dezoksy [38]

Extensive properties such as mass and Volume depend on the amount of matter being measured.

Intensive properties such as density and color do not depend on the amount of the substance present,

Physical properties can be measured without changing a substance's chemical identity.

and Hope this help and i hope you do great on the quiz

7 0

3 years ago