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gogolik [260]
2 years ago
15

Zzzzzzzzzzzzzzzzzzzzzzz

Chemistry
1 answer:
Korolek [52]2 years ago
6 0

Answer:

Wake up wake up wake up wake up

Explanation:

wake up wake up wake up wake up

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HELP ASAP PLEASE PLEASE PLEASE Complete and balance the following reaction. Note that Cr forms +3 in the product. ____ Sn(NO3)2
Rzqust [24]

Answer:

Explanation:

3Sn(NO3)2 (aq) +  2Cr(s) → 2Cr(NO3)3(aq ) + 3Sn(S )

5 0
3 years ago
Which layer of ground contains organic matter and tiny rock particles?
Ann [662]

Answer:

A Horizon - The layer called topsoil; it is found below the O horizon and above the E horizon. Seeds germinate and plant roots grow in this dark-colored layer. It is made up of humus (decomposed organic matter) mixed with mineral particles.

4 0
3 years ago
What does the Roman numeral in the name Tin IV Fluoride indicate?
Gre4nikov [31]

Answer:

It indicates the number 4

Explanation:

IV=4

4 0
3 years ago
Read 2 more answers
a chemist isolated a gas in a glass bulb with a volume of 255 ml at a temperature of 25 and a pressure of 10 torr. The gas weigh
uranmaximum [27]

Answer:

88.5 g/m is the molar mass for the gas

Explanation:

We need the Ideal Gases Law equation to solve this:

P . V = n . R . T

Pressure (P) = 10 Torr

We must convert to atm → 10 Torr / 760 Torr = 0.0131 atm

Volume (V) = 255 mL

We must convert to L → 255 mL /  1000 = 0.255 L

n = number of moles

moles = mass in g / molar mass

12.1 mg/ 1000 = 0.0121 g

T° = 25°C + 273K = 298K

R = 0.082 L.atm /mol.K

Let's replace the values

0.0131 atm . 0.255L = 0.0121 g / x .  0.082 L.atm /mol.K  . 298K

(0.0131 atm . 0.255L) / (0.082 L.atm /mol.K  . 298K) = 0.0121 g / x

1.367×10⁻⁴ /mol = 0.0121 g / x

x = 0.0121 g / 1.367×10⁻⁴ mol = 88.5 g/m

4 0
3 years ago
How do you do Calorimetry? We've had it in class for about a week and I still don't understand it so does anyone have any simple
Ede4ka [16]

It basically works like this:

You dry out the food

put it in this ceramic oven thingy surrounded with water

burn the food

the water will heat up

measure the water temperature in f

= calories

Calorimetry is the science or act of measuring changes in state variables of a body for the purpose of deriving the heat transfer associated with changes of its state due, for example, to chemical reactions, physical changes, or phase transitions under specified constraints.

in this case, you're finding the amount of energy is contained within it when combusted

8 0
3 years ago
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