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Aleks [24]
3 years ago
15

A woman’s menstrual cycle usually lasts about 28 days T/F

Chemistry
2 answers:
Sergio039 [100]3 years ago
6 0

A woman’s menstrual cycle usually lasts about 28 days *TRUE*

anastassius [24]3 years ago
3 0

This is true.

For the entire cycle, it lasts from 26 to 31 days.

Hope this helps! Brainliest is always appreciated!

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3. Write DISSOCIATION or IONIZATION equations for the following chemicals:
Romashka [77]

Answer:

a) HNO3 -> H+ + NO3- disassociation of Nitric Acid; to yield a Nitrate ion and a Proton, H+, or as a Hydronium ion H3O+

b) H2S04 -> Disassociation of Sulfuric Acid; simple way- 2H+ + SO4- -

c) H2S hydrogen sulphide in water is an acid; thus H+ HS- disassociation.

d) NaOH -> dissociation of Na+ + OH-; this is complete; sodium hydroxide is deliquescent, meaning it will draw water - EVEN from the air! Strong Base

e) Na2CO3 -> 2Na+ CO3- - Ionization of sodium carbonate - a salt

f) Na2S04 -> 2Na+ + SO4 - - ionization of sodium sulphate - a salt

g) NaCl​ -> Na+ + Cl- ionization of the salt, Sodium Chloride

Explanation:

Salts ionize at different rates; acids or bases dissociate; these are mostly strong acids and NaOH, a strong base.

8 0
3 years ago
A standard backpack is approximately 30cm x 30cm x 40cm. Suppose you find a hoard of pure gold (density = 19.3 g/cm3) while trea
Law Incorporation [45]

Answer:

30

Explanation:

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6 0
3 years ago
What is the precipitation reaction of sodium nitrate and lead (II)?
Vadim26 [7]
The precipitation reaction of sodium nitrate and lead (II) chloride would not happen. No reaction will happen between these substances. Hope this answers the question. Have a nice day.
8 0
3 years ago
How many moles are present in 2.45 x 1023 molecules of CH ?
Phantasy [73]

Answer:

the aware is 6182

Explanation:

jejejieieiejeie

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3 years ago
An astronaut weighs 104 newtons on the moon,where the strength of gravity is 1.6 newtons per kilogram
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I'd say he ways about 35 kilograms, but I'm probably wrong, xD

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