Difference between gynosperms and angiosperms

1 answer:

6 0

Gynosperms is a plant that has seeds unprotected by an ovary or fruit and Gymnosperms include the conifers and cycads and angiosperms are a plant that has flowers and produces seeds enclosed within a carpel. The angiosperms are a large group and include herbaceous plants, shrubs, and most trees.

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A 642 mL sample of oxygen gas at 23.5°C and 795 mm Hg, is heated to 31.7°C and the volume of the gas expands to 957 mL. What is

Ratling [72]

We can use the combined gas law equation to find the new pressure of the gas.
$\frac{P1V1}{T1} = \frac{P2V2}{T2}$
where P - pressure
V - volume
T - temperature
parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation
P1 - 795 mm Hg x 0.0013 atm/ mm Hg = 1.033 atm
T1 - 23.5 °C + 273 = 296.5 K
T2 - 31.7 °C + 273 = 304.7 K
substituting the values in the equation
$\frac{1.033 atm *642 mL}{296.5K}= \frac{P*957mL}{304.7K}$
P = 0.712 atm
the answer closest to this value is A) 0.723 atm
therefore answer is
<span>A) 0.723 atm</span>

8 0

4 years ago

Could someone tell me if i’m correct

vladimir1956 [14]

Yeahh you should be anyways!!

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3 years ago

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The spontaneous decay of an atom is called

Sladkaya [172]

The spontaneous decay of an atom is called transmutation

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4 years ago

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A certain skin lotion is a fine mixture of water and various oils. This lotion is cloudy and cannot be separated into oil and wa

Nataly [62]

A certain skin lotion is a fine mixture of water and various oils. This lotion is cloudy and cannot be separated into oil and water by any filtration or centrifuge, it is a colloid mixture. The colloid consists of large molecules & ultra microscopic particles of a substance that has been dispersed by another substance.

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3 years ago

A solution containing 42% naoh by mass has a density of 1.30 g/ml. what mass, in kilograms, of naoh is in 6.00 l of this solutio

Aliun [14]

NaOH
Na=23
O=16
H=1
SO,NaOH=23+16+1
NaOH=40g/mol
42% of 40=42/100x40
oxygen is the compound
density=mass/volume
1.30=mass/6
mass=7.8g

3 0

4 years ago

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