Hey do you guys have any ideas for a science fair project

1 answer:

3 0

You could do how different liquids affect plant growth. Take 3 SAME plant seeds and plant them in the SAME environment. For plant A use juice, for plant B, use milk, and for planting C, use coffee.

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Why iodide ions cannot be determined by Mohr method

pickupchik [31]

Answer:

Exactly the same approach can be used for determination of bromides. Other halides and pseudo halides, like I- and SCN-, behave very similarly in the solution, but their precipitate tends to adsorb chromate anions making end point detection difficult.

Hope it helps!

8 0

3 years ago

If 6.00 g of the unknown compound contained 0.200 mol of C and 0.400 mol of H, how many moles of oxygen, O, were in the sample?

Arada [10]

Convert moles to mass.

mass C = 0.2 mol * 12 g / mol = 2.4 g

mass H = 0.4 mol * 1 g / mol = 0.4 g

So mass left for O = 6 g – (2.4 g + 0.4 g) = 3.2 g

Calculating for moles O given mass:

moles O = 3.2 g / (16 g / mol) = 0.2 moles

Answer:

<span>0.2 moles O</span>

8 0

4 years ago

Read 2 more answers

Consider the electronic configuration for the following elements:

zavuch27 [327]

Answer:

Explanation:

P. Group 6 , block p

Q. Group 1 , block s

R. Group 3, block s

S . Group 5.block p

Q2p

Q3S

5 0

3 years ago

How many protons, electrons, and neutrons does a magnesium-25 atom have if it has a sharge=2?

Sveta_85 [38]

Answer:

There are 12 protons, and 10 electrons in an Mg2+ ion, the normal amount of neutrons is 12.

Explanation:

3 0

3 years ago

If 10.5 L of a gas at 0.98 atm has its pressure increased to 1.50 atm, what is the new volume?

serg [7]

Answer:

The new volume of this gas is 6.86 liters.

Assumption: the temperature of this gas stays the same, and this gas is ideal such that Boyle's Law applies.

Explanation:

By Boyle's Law, the volume of an ideal gas shall be inversely proportional to the pressure on it when temperature stays the same (as in an isothermal process.)

In other words,

$\displaystyle V \propto \frac{1}{P}$ ,