3 years ago

Hypothesize what would happen if the mirrors did not reflect light.

Chemistry

1 answer:

nataly862011 [7]3 years ago

6 0

If mirrors did not reflect light, then we would be able to see through it.

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3. A gram food sample is burned completely in a calorimeter that contains 1000. of water The temperature of the water increases

lidiya [134]

The food has 23629.64 cal

<h3>Further explanation</h3>

Given

mass = 1000 g of water

temperature increases 23.65 * C

Required

The energy of the food

Solution

Heat absorbed by water :

Q = m . c . Δt

Q = 1000 g x 4.184 J/g°C x 23.65 °C

Q = 98951.6 J

1 Joules = 0.2388 Calories

98951.6 J = 23629.64 cal

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3 years ago

What is the volume of an oxygen tank if it contains 12 moles of oxygen at 273 K under 75 kPa?

Zina [86]

Given:
n = 12 moles of oxygen
T = 273 K, temperature
p = 75 kPa, pressure

Use the ideal gas law, given by
$pV=nRT \\ or \\ V= \frac{nRT}{p}$
where
V = volume
R = 8.3145 J/(mol-K), the gas constant

Therefore,
$V= \frac{(12\,mol)(8.3145\, \frac{J}{mol-K} )(273\,K)}{75 \times 10^{3} \, Pa}= 0.3632\,m^{3}$

Answer: 0.363 m³

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4 years ago

What is the other product for this reaction? Hbr + NaOH —> ( select 2)

ratelena [41]

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Answer: HBr + NaOH = nabr + h2o

Explanation:

I hope this helped!

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3 years ago

A physical change is chemically the same after the experiment.<br> True<br> False

Elan Coil [88]

Answer: True

Explanation:

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Which of the following is a large glycoprotein?

Levart [38]

Answer:

B. Oxytocin

I think this is correct answer...

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