Answer:
Animal cells are more round and do not have a rigid cell wall.
Explanation:
Answer:
To convert from mols to grams, multiply the number by the total molar mass of the compound.
To find the approximate molar mass of a compound, add up the molar masses of each element in the compound, making sure to multiply by the subscripts.
<u>#2 for example:</u>
First, find the molar mass of NaCl.
Molar mass of Na= 22.990g (refer to a periodic table or look it up)
Molar mass of Cl= 35.45g
22.990g + 35.45g= 58.44g
Next, convert from mols to g.
2.19 mol x 58.44g= 127.98g NaCl
To convert from grams to mols, do the same thing as mols to grams except DIVIDE instead of multiply.
<u>#3 for example:</u>
NaC2H3O2
Na= 22.99g
C2= 12.011 x 2 => 24.022g (multiply molar mass of C by 2 since there are 2 carbons)
Do this for the rest of the elements in the compound and add them up. The total molar mass should be approximately 82.0343g.
Next, convert from g to mol.
14.68g/82.0343g≈ 0.179 mol
Answer:
Explanation:
Hello there!
In this case, according to the given chemical equation, it turns out possible for us to realize there is a 4:3 mole ratio of chromium(III) nitrate to lead(IV) nitrate, and therefore, we can calculate the moles of the former by applying the shown below stoichiometry setup:
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Answer:
Covalent
Explanation:
In the carbon tetrachloride molecule, four chlorine atoms are positioned symmetrically as corners in a tetrahedral configuration joined to a central carbon atom by single covalent bonds
Answer: E. It decreases the value of Eact.
Explanation:
Activation energy is the extra energy that must be supplied to reactants in order to cross the energy barrier and thus convert to products.
A catalyst is a substance which increases the rate of a reaction by taking the reaction through a different path which involves lower activation energy and thus more molecules can cross the energy barrier and more molecules convert to products.
The catalyst itself does not take part in the chemical reaction and is regenerated as such at the end.