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3 years ago

When will a seed begin to germinate?

Chemistry

2 answers:

ladessa [460]3 years ago

7 0

1 & 2
Are the correct answer

Hope it helps :)

Vlada [557]3 years ago

4 0

When it has sunlight and water

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How many neutrons does the most common isotope of hydrogen have?

Lorico [155]

Protium - the most common isotope of hydrogen - has no neutrons in its nucleus.

3 0

3 years ago

You have 54.32 grams of PbCl4. How many moles of PbCl4 do you have?

Dima020 [189]

Answer:

0.156mol

Explanation:

Number of moles of a substance can be calculated from its mass by dividing its mass by molar mass i.e.

Number of moles (n) = mass/molar mass

Molar mass of PbCl4 is as follows, where Pb = 207.2g/mol, Cl = 35.5g/lol

PbCl4 = 207.2 + 35.5(4)

= 207.2 + 142

= 349.2g/mol

Using: mole = mass/molar mass

mole = 54.32 grams ÷ 349.2g/mol

mole = 0.1555

mole = 0.156mol

6 0

3 years ago

In the presence of dry sulfuric acid at 100 degree c, salicylic acid can react with itself to form a water-insoluble precipitate

Leya [2.2K]

The side reaction will affect the purity and percent yield that, it will decrease the purity and also decrease the present yield.
Due to side reaction, the amount of aspirin which is being produced will be less for some amount of starting material which is used. The present yield will decrease. The insoluble water which is being precipitated is formed as a result of the side-reaction which will remain with aspirin and finally contaminate the aspirin.
The purity of aspirin will also decrease.

4 0

3 years ago

HELPP MEEE 15 POINTS!

Mademuasel [1]

The answer is A.

During any chemical change the total mass doesn’t changes. Whatever the total mass of starting materials was present the same mass of ending products is present in a chemical reaction.

5 0

4 years ago

Explain with equations and calculations, when necessary, whether an aqueous solution of each of these salts is acidic, basic, or

My name is Ann [436]

CaCl₂ is a basic salt.

Think about the same query for NaCl, a substance that most chemistry students are familiar with. A salt is always produced when an acid and a base combine, and this is how you make NaCl. NaOH is a basic, while HCl is an acid.

NaCl + H2O NaOH + HCl

Additionally, the salt will be neutral since the utilized bases (NaOH) and acids (HCl) are both strong acids and bases, respectively (if any or both are weak, then things change).

Ca(OH)2 can be used in place of NaOH when reacting with HCl.

Ca(OH)2 + 2HCl becomes CaCl2 + 2H2O.

CaCl2 is therefore neither an acid nor a base, by comparison thus, neutral salt alone.

<h3>What are neutral salts?</h3>

Strong acids and strong bases combine to generate neutral salts, which are so named because the color of their aqueous solutions is neutral to litmus. Examples include the neutral salts NaCl, KCl, K2S04, NaN03, KCl03, and KClO4.

To learn more about neutral salts:

brainly.com/question/3103303

#SPJ4

6 0

2 years ago