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Nutka1998 [239]
3 years ago
11

What happens to cause a female to begin puberty

Chemistry
1 answer:
vova2212 [387]3 years ago
5 0
Hormones which are chemical produced in the body.The hormones are like chemical messages which send a message to the ovaries.the ovaries release hormones which work together hence starting puberty
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A 400 mL sample of hydrogen gas is collected over water at 20°C and 760 torr the vapor pressure of water at 20°C is 17.5 torr. w
o-na [289]

Answer:

V2 = 17371.43ml

Explanation:

We use Boyles laws

since temperature is constant

P1V1=P2V2

760 x 400 = 17.5 x V2

304000 = 17.5 x V2

V2 = 304000/17.5

V2 = 17371.43ml

4 0
3 years ago
2. How much heat is released when 432g of water cools down from 710C to 180C?
nadya68 [22]
The heat released by the water when it cools down by a temperature difference AT

is Q = mC,AT

where

m=432 g is the mass of the water

C, = 4.18J/gºC

is the specific heat capacity of water

AT = 71°C -18°C = 530

is the decrease of temperature of the water

Plugging the numbers into the equation, we find

Q = (4329)(4.18J/9°C)(53°C) = 9.57. 104J

and this is the amount of heat released by the water.
7 0
3 years ago
If velocity is positive, which would most likely yield a negative acceleration?
Nataliya [291]

Answer:

An initial velocity that is faster than a final velocity

Explanation:

Edg 2020

5 0
2 years ago
What would cause a liquid to turn into a solid?
KIM [24]
It’s C
Cooling a liquid til it freezes will cause a liquid to turn into a solid
3 0
2 years ago
Read 2 more answers
Write the chemical formula, condensed formula, and Lewis structure for each of the following hydrocarbons:
son4ous [18]

Explanation:

Here I send you all the 3 elements that you are asking for.

Notice that first on the left you will find lewis structure, then condensed and finally chemical formula of each of the compound you enlisted.

5 0
2 years ago
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