He is missing a (real) control. Growing two plants without plant food at all doesn't count; in order to see if the new food is better, he must also grow plants with the original food in order to compare it.
He does have an independent variable. This is the type of plant food. It's independent because he has direct control over it.
He needs to give plants the same conditions besides food: same water (amount), same light exposure, same temperature, etc.
He needs to choose a quantitative way to measure how much the plants grew, like mass or length.
The Ti 2+ ions is represented by electron configuration (Ar)3d2. Titanium is in atomic number 22 and its electronic configuration is (Ar)3d2 4s2. Titanium loss two electron that is 4s2 electrons hence the electronic configuration ( Ar)3d2. 4s2 is the valence electron hence it the one which is lost to form Ti2+
The answer is 0.0171468704904. We assume you are converting between moles Mg(OH)2 and gram. This compound is also known as Magnesium Hydroxide. 1 mole<span> is equal to </span>1 moles<span> Mg(OH)2, or 58.31968 grams.</span>
Explanation:
There is a clear cut difference between a compound and an element:
- A compound is made up of substances composed of two or more kinds of atoms or elements joined together in a definite grouping.
- An element is a distinct substance that cannot be split-up into simpler substances. These substances are only made up of one kind of atom.
Compounds are formed so that unstable elements can attain stability.
Carbon monoxide is made up two elements: Carbon and oxygen that have combined chemically together.
- Carbon monoxide is a toxic gas and it is different from oxygen atom and carbon atom.
- Carbon is a solid but carbon monoxide is a gas.
- Oxygen atom does not exists on its own but it exists as Oxygen gas O₂
- The properties of carbon monoxide clearly differ from that of oxygen and carbon.
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Answer:
49.95 g of HCl
Explanation:
Let's formulate the chemical equation involved in the process:
Ca(OH)2 + 2 HCl → CaCl2 + 2 H2O
This means that we need 1 mole of Calcium hydroxide to neutralize 2 moles of hydrochloric acid. From this, we calculate the quantity of HCl moles that would be neutralized by 0.685 moles of Ca(OH)2
1 mole Ca(OH)2 ---- 2 moles HCl
0.685 moles Ca(OH)2 ---- x = 1.37 moles HCl
Now that we know the quantity of HCl moles that would react, let's calculate the quantity of grams this moles represent:
1 mole of HCl ---- 36.46094 g
1.37 moles ------ x = 49.95 g of HCl
