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Alik [6]
3 years ago
5

How does science help us protect our nations resources.

Chemistry
2 answers:
Rina8888 [55]3 years ago
5 0
Science has helped us protect our resources because today, scientists have figured out a way to predict the weather and help us prepare for any storms to come.
Helga [31]3 years ago
3 0
By showing what resources the planet had to offer
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What is the mass, in grams, of solute in 255mL of a 0.0525M solution of KMnO4 (MM =
aliya0001 [1]

Answer:

Mass = 2.12 g

Explanation:

Given data:

Volume of KMnO₄ = 255 mL (255/1000 = 0.255 L)

Molarity = 0.0525 M

Mass in gram = ?

Solution:

First of all we will calculate the number of moles.

<em>Molarity = number of moles of solute / volume in litter</em>

0.0525 M = number of moles of solute / 0.255 L

Number of moles of solute = 0.0525 M ×0.255 L

Number of moles of solute = 0.0134 mol

Mass in gram:

<em>Number of moles = mass/ molar mass</em>

Mass = moles × molar mass

Mass = 0.0134 mol × 158.04 g/mol

Mass = 2.12 g

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3 years ago
Which type of energy is stored within an object and is partially determined by the object’s position?
Vsevolod [243]
It is A. Electrical energy
3 0
2 years ago
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Today is a historic day! Why? Write a paragraph.
alekssr [168]

Answer:

JOE BIDEN GOT ELECTED

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2 years ago
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How many grams of FeCl 3 are in 250. mL of a 0.100 M solution?
Naddika [18.5K]

Answer:

The correct answer is option B

Explanation:

$Molarity=\frac{Weight}{Molecular \,weight} \frac{1000}{V(in \, ml)}

Given values,

Molarity of $FeCl_3=0.100M$

Volume of solution, $V=250ml$

Molecular weight of $FeCl_3=162.2$

Substituting this values in Molarity formula, we get

$0.1=\frac{weight}{162.2} \times\frac{1000}{250} $\\$\Rightarrow 16.22=weight\times4$\\$\Rightarrow weight=\frac{16.22}{4} $\\$\therefore weight=4.06g$

5 0
3 years ago
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