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Gala2k [10]
3 years ago
15

How can i write a problem statement for a science project​

Chemistry
2 answers:
allochka39001 [22]3 years ago
8 0

Answer:

The problem statement is usually the problem that happened DURING the experiment

anygoal [31]3 years ago
3 0
Basically the problem during the experiment

Explanation: You cannot have a problem before the experiment, you have to have time during the experiment to write a problem statement. You can write it like an analysis, and explain what you found out and what you tested, during the experiment.
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If you combine neon argon and helium what would happen
Savatey [412]
All are gases so no visible reaction persay, unless in closed quarters and then massive pressure.
5 0
3 years ago
If I have a 50 liter container that holds 45 moles of gas at a temperature of 200 0C, what is the pressure inside the container?
Bezzdna [24]

hdhjdbdhjssnmsmsnsjsbxbhow?

8 0
4 years ago
A sample of a pure substance with a density of 3 g/mL is separated into two pieces. One piece has a mass of 50 g and the other p
pshichka [43]

Answer:

8.3ml

Explanation:

to get volume u have to divide 25g over the density, i rounded to the nearest tenth, if you don't want to then write out the full number with all the decimals

4 0
3 years ago
Explain why the atomic radius decreases across a period and increases down a group ?​
andreyandreev [35.5K]

Answer:

In general, atomic radius decreases across a period and increases down a group. ... Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital. This results in a larger atomic radius.

4 0
3 years ago
Calculate the mass of CaCl2•2H2O required to make 100.0 mL of a 0.100 M solution. Each of the calculations below will take you t
Zolol [24]

Answer:

The mass is 1.4701 grams and the moles is 0.01.

Explanation:

Based on the given question, the volume of the solution is 100 ml or 0.1 L and the molarity of the solution is 0.100 M. The moles of the solute (in the given case calcium chloride dihydride (CaCl2. H2O) can be determined by using the formula,  

Molarity = moles of solute/volume of solution in liters

Now putting the values we get,  

0.100 = moles of solute/0.1000

Moles of solute = 0.100 * 0.1000

= 0.01 moles

The mass of CaCl2.2H2O can be determined by using the formula,  

Moles = mass/molar mass

The molar mass of CaCl2.2H2O is 147.01 gram per mole. Now putting the values we get,  

0.01 = mass / 147.01

Mass = 147.01 * 0.01

= 1.4701 grams.  

4 0
3 years ago
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