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Sav [38]
2 years ago
7

Can some one help I'm lost iam being timed:( Show using two conversion factors how you would convert from 0.020 kg into mg

Chemistry
1 answer:
dezoksy [38]2 years ago
5 0

Answer:

20000 Mg

Explanation:

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Which contains more molecules: 340g of NH3 or 90g of H2O show your working!!
Shtirlitz [24]

Answer:

atomic mass ( N =14 , H = 1×3 that means 14+3=17

340gram×17gram / mole

=5780mole

atomic mass ( H= 1×2 ,O= 16 =16+2 =18

90gram×18gram /mole

=1620mole

I think 340g ammonia (NH3)

6 0
3 years ago
Read 2 more answers
A mixture which contains more than one phase is called .
kirza4 [7]
This is a heterogeneous mixture. 

6 0
3 years ago
Read 2 more answers
What is the molecular formula for a compound that is 44.87% potassium, 36.7%
Phoenix [80]

Answer:

Molecular formula: S4K8O16  empirical formula: SK2O4

Explanation:

First we find the moles of each by first finding grams (using the percent) and then using stoichiometry to convert into moles:

Sulfur: 696 *.18 = 125.28grams S* \frac{1 mole S}{32.065 g S} = 3.907 moles S

Potassium: 696 *.4487 = 312.2952 *\frac{1 mole K}{39.08 g K}= 7.99117 mole K

Oxygen: 696 * .367 = 255.432 * \frac{1 mol O}{16g O} = 15.9654 mole O

Then we divide each value by the atom with the smallest number of moles to find the mole ratio:

3.907/3.907= 1

7.99117 mole K/ 3.907= 2.043

15.9654 mole O/ 3.907= 4.08

The empirical formula is SK2O4

To find the molecular formula, we divide the mass given (696) by the mass of the empirical formula (174.22) to get 4. We then divide each atom by 4.

Molecular formula: S4K8O16

5 0
2 years ago
With enough nitrogen (N2), suppose you have 65.3 moles of Hz, then how many moles of ammonia (NH3) are produced? ​
Nana76 [90]
(N2) = to 65.3 is the right answer plus 21 = 63
4 0
3 years ago
Use the data in the simulation to find the Ka value of HF, hydrofluoric acid
Dmitry_Shevchenko [17]
We need to find the Ka value of HF. First, set up the balanced chemical equation:

HF ===> H+ + F-

The formula for the Ka value of an acid is

Ka = [concentration of products] / [concentration of reactants]

Ka = [H+] [F-} / [HF]

So if we are given the concentration of the products and reactants, we will be able to solve for the Ka value of HF. 
4 0
3 years ago
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