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pantera1 [17]
3 years ago
6

I need help if anyone would like to provide info

Chemistry
2 answers:
Pie3 years ago
8 0
I think the answer is D
Zigmanuir [339]3 years ago
4 0
I believe the answer is A. <span />
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How can so many different substances in the world be made of so few elements?
Mrrafil [7]
Matematically speaking, maybe because:
The number of substances = number of elements + number of different combinations of those elements
7 0
3 years ago
How many grams of solute are needed to prepare a 3.50% mass/mass solution that has a solution mass of 2.50x102 grams.
Elis [28]
One way of expressing concentration is by percent. It may be on the basis of mass, mole or volume. Percent is expressed as the amount of solute per amount of the solution. For this case, we are given the percent by mass. In order to solve the amount of solute, we multiply the percent with the amount of the solution.

Mass of solute = percent by mass x mass solution
Mass of solute = 0.0350 x 2.50 x10^2 = 8.75 grams of solute
5 0
3 years ago
Calculate the molarity of a solution with 233.772g sodium chloride dissolved in 2,000mL of water
LekaFEV [45]

Answer:

The molarity is 2M

Explanation:

First , we calculate the weight of 1 mol of NaCl:

Weight 1mol NaCl= Weight Na + Weight Cl= 23 g+ 35, 5 g= 58, 5 g/mol

58,5 g---1 mol NaCl

233,772 g--------x= (233,772 g x1 mol NaCl)/58,5 g= 4 mol NaCl

<em>A solution molar--> moles of solute in 1 L of solution:</em>

2 L-----4 mol NaCl

1L----x0( 1L x4mol NaCl)/4L =2moles NaCl---> 2 M

3 0
3 years ago
Several bird species feed is a certain species of tree. Each bird species feeds in a different part of the tree. Which statement
Fofino [41]

Answer:

They have adapted to different niches.

Explanation:

due to competition

8 0
3 years ago
Read 2 more answers
A gas exerts a pressure of 4.1 atm at 300K. What is the pressure of the gas at 1010K?
Ainat [17]

Answer: 10

Explanation: 10 + 4.1 = 10

7 0
2 years ago
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