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Katyanochek1 [597]
3 years ago
14

Do yeast need air to release carbon dioxide?

Chemistry
1 answer:
nasty-shy [4]3 years ago
4 0
Yes because if you don't it might blow up I forgot what would happen
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Which of the following has the shortest bond lenght Options A). H2 B).N2 C).O2 D).F2
hammer [34]

Answer:

B. N2

Explanation:

The triple bonds pull the atoms closer together, and since N2 is the only molecule with the triple bond, it is the shortest bond length.

6 0
3 years ago
What are some ways to eliminate waste
Margaret [11]

Answer:

use following methods

Explanation:

  • Recycling the waste
  • segregation and dumping in right place
  • practice 4 R's
  • practice waste Management
  • reduce using undegredable waste like plastic bags

4 0
2 years ago
Even though so much energy is required to form a metal cation with a 2+ charge, the alkaline earth metals form halides with gene
nasty-shy [4]

The ∆Hrxn of the reaction is -394.5kJ/mol.

<h3>What is alkaline earth metal? </h3>

The alkaline earth metals are those elements which correspond to group 2 of the modern periodic table.

All elements of this group forms a cation of +2 charge.

The other elements of this group are:

Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium.

<h3>What is Halogen? </h3>

The Halogen elements are present in group 17 of the modern periodic table.

All elements of this groups forms anions of -1 charge.

The elements of this group are:

Fluorine, Chlorine, bromine, iodine, and astatine.

∆Hrxn = ∆H(bond broken) - ∆H(bond formed)

We have following data of bond energy in kJ/mol:

Mg—Mg = 738

Cl—Cl = -349

Mg—Cl = 783.5

Since, one mole of Mg react with one mole of Cl atom to form one mole of MgCl

∆Hrxn = 738-349-783.5

∆Hrxn = -394.5kJ/mol.

Thus, we concluded that the ∆Hrxn of the reaction is -394.5kJ/mol.

learn more about bond energy:

brainly.com/question/13526463

#SPJ4

3 0
1 year ago
Suppose you were required to make a solution by diluting 20.0 mL of an aqueous solution to a final volume of 750 mL.
torisob [31]
The first thing you do before performing anything in the laboratory is to read the procedure and prepare the materials needed. Next, if you already have the solution where you are supposed to take your 20 mL sample, then have it near you. Then, prepare a volumetric flask (750 mL) and a 20-mL pipette. Wash the pipette 3 times with the sample solution. If your diluent is water, wash the flask 3 times with water. Now, get 20 mL of sample from your parent solution, then add it to the flask (previously washed with water). Finally, add water until the mark in the flask and make sure that the water added is up to the mark based on the lower meniscus reading to be accurate in the amount inside the flask. <span />
7 0
3 years ago
Convert 25 liters per hour to milliliters per second.
Dominik [7]

Answer:

6.94444

Explanation:

4 0
3 years ago
Read 2 more answers
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