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2 years ago

The sexual reproduction of plants occurs through what process? (2 points)

Chemistry

1 answer:

elena-14-01-66 [18.8K]2 years ago

5 0

Answer:

Pollination

Explanation: Involves production of male and female. Sexual reproduction is also the flowering of plants.

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A pharmacist wishes to strengthen a mixture from 10%alcohol to 30% alcohol. How much pure alcohol should be added to 7 liters of

Tomtit [17]

Answer:

2 litres of pure alcohol will be added to make the overall concentration of 9 litres of mixture as 30%.

Explanation:

Suppose x is the number of litres added to the 10% mixture than the quantity of new mixture is given as below

$n_{old}=7$ litres
$n_{new}=7+x$ litres

Also the quantity of alcohol is given as

$q_{old}=10 \% \, of \, 7 \, litres =0.7$

$q_{added}=x$

$q_{new}= 30 \% \,of \,new\, quantity = 0.3(7+x)$

Now the equation is as

$q_{old}+q_{added}=q_{new}\\0.7+x=0.3(7+x)\\0.7+x=2.1+0.3x\\x-0.3x=2.1-0.7\\0.7x=1.4\\x=2 \, litres$

So 2 litres of pure alcohol will be added to make the overall concentration of 9 litres of mixture as 30%.

8 0

3 years ago

The answer is: variable

sergeinik [125]

Answer:

variable: not consistent or having a fixed pattern; liable to change.

Explanation:

6 0

2 years ago

Which of the following food proteins has the best assortment of essential amino acids for the human body?

Katen [24]

The answer to your question is an Egg

7 0

2 years ago

Use the activity series below to predict whether the following reactions will take place.

andrey2020 [161]

First one is yes second one is no :)

5 0

2 years ago

Identify the base in this acid-base reaction:

yarga [219]

Answer:

$\boxed{\text{NaOH}}$

Explanation:

$\rm \underbrace{\hbox{NaOH }}_{\hbox{base}} + \underbrace{\hbox{HCl}}_{\hbox{acid}} \longrightarrow \, NaCl + H$_{2}$O$

A hydroxide of a metal is a base.

$\text{The base is }\boxed{\textbf{NaOH}}$

B is wrong. HCl is an acid.

C is wrong. NaCl is a salt.

D is wrong. Water is neutral.

8 0

2 years ago

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