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Alex
2 years ago
13

To determine the specific heat capacity of copper, Alyssa performed an investigation by which she dropped a heated piece of copp

er into a calorimeter. Some of the data Alyssa recorded is given in the following table. The experimental specific heat capacity of the copper is _____J/g°C. Use three significant digits in your answer.

Chemistry
1 answer:
user100 [1]2 years ago
6 0

Answer:

0.446

Explanation:

ccu =  3035.655 / 104 g x (98.9 - 33.5)  = 0.446 J / g 0 C

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Write dissociation equations for the following soluble salts dissolving in water. Then draw a particle - level representation fo
zhuklara [117]

Answer:

The dissociation equations for NaBr gives Na+ and Br-

The dissociation equations for ZnCl2 gives Zn2+ and 2 Cl-  

Explanation:

The following pictures shows that the dissociation of one particle of NaBr produces one particle of Na+ (sodium cation) and one particle of Br- (bromine anion).

The dissociation of one particle of ZnCl2 produces one particle of Zn+2 (Zinc cation) and two particles of Cl- (chlorine anion).

8 0
3 years ago
A .115 L sample of dry air has a pressure of 1.0895633 atm at 377 K. What is the volume of the sample if the temperature is incr
matrenka [14]

Answer:

V= 0.147 L

Explanation:

This is simply the application of combined gas law twice, to find the unknowns.

Combined gas law states that: PV = nRT

P= pressure of air

V= volume of air

n= moles of air

R= Universal gas constant ( 0.08205 L atm mol⁻¹ K⁻¹)

T= Absolute temperature in kelvin.

n=\frac{P * 0.115}{R * 377}

Now, applying the same gas law at 483K and substituting for n

V = \frac{P * 0.115}{R * 377} * \frac{R* 483}{P}

V= \frac{0.115 * 483}{377}

V= 0.147 L

4 0
3 years ago
I need help that youu
Anestetic [448]

Answer:

it is ether a or b i think more b tho

Explanation:

Hope i could help

6 0
3 years ago
An empty graduated cylinder has a mass of 11.4g.When it is filled with an unknown liquid to the 45.2 mL mark the cylinder and th
Lesechka [4]
The density of the liquid is about 1.85 g/mL.

Density is mass/volume. The volume is given (45.2 mL). The mass must be found by subtracting the tare weight of the graduated cylinder from the total:
95.1 g- 11.4g = 83.7g

Using the mass and volume of the liquid, you can now calculate the density:
d = m/v = 83.7g/45.2 mL = 1.8517699115 g/mL.

Of the original values, the least number of significant figures are 3, so the answer must have a degree of accuracy of 3 significant figures:
1.8517699115 g/mL ≈ 1.85 g/mL.
3 0
3 years ago
What is the frequency of a wave ?
Musya8 [376]
Hi there! The frequency of a wave is the amount of cycles (or waves) that occur in the given time. So, the answer is D. Normally, the time given is one second, so the frequency unit is Hertz (Hz) most of the time.

Here are some other definitions:

wavelength- the distance from one crest to crest or trough to trough

I hope this helps you! :))

6 0
2 years ago
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