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Kruka [31]
4 years ago
10

Help cure the stupid by answering this also will give crown if right

Chemistry
2 answers:
posledela4 years ago
5 0

Answer:

i think B

Explanation:

Usimov [2.4K]4 years ago
5 0
The answer is B. Displacement describes the result of an object's motion, regardless of the path traveled
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Please answers only , if you dont know do not reply you will be reported . 100 pts and brainliest.
Leokris [45]

Answer:

1. 77.5g,

2. 1.78 mol,

3. 281 g

4. add 80 mL of water

Explanation:

1. Molar mass (Na2O) = 2*23.0 + 16.0 = 62.0 g/mol

1.25 mol *62.0 g/1mol = 77.5 g Na2O

2. Molar mass (KOH) = 39.1 +16.0+1.0 = 56.1 g/mol

100 g * 1 mol/56.1 g = 1.78 mol KOH

3. Molar mass (KOH) = 39.1 +16.0+1.0 = 56.1 g/mol

5 mol * 56.1g/1 mol = 281 g KOH

4. M1V1 =M2V2

M - molarity, V- volume of solution

2.0M*20mL = 0.4M*V2

V2 = 2.0*20/0.4 = 100 mL

Volume of diluted solution = 100 mL

We have 20 mL of solution, we need 100 mL of solution,

so we need to add (100-20) =80mL of water.

Take 20 ml 2.0 Molar  of solution of HCl , add 80 mL of water, then we get 100 mL 0.4 M solution of HCl.

3 0
3 years ago
The ancient remains or trace of once-living things.
vodka [1.7K]
Archeology? maybe im not too sure
6 0
3 years ago
I have to obtain an empirical formula from:
JulsSmile [24]
When finding empirical formulas decimals are fine so you wouldn't have to multiply all of them to turn into whole numbers. What you would do is divide each of those numbers by the smallest of those numbers and take the nearest whole number so if you had:

1.81 mol     .6 mol     and .3.61 mol you would divide each of those numbers by .6
and you would have 3, 1, and 6

for your problem you would divide them all by 1 and Carbon would be 2 (if your teacher normally has you round down at .5's then it would be 1)  hydrogen would be 3 and oxygen would be 1. 
C2H3O

7 0
4 years ago
Why would you expect a packet of sugar to dissolve faster in hot tea than iced tea?
Phantasy [73]
Because of the heat level which makes the sugar break down faster. Your welcome.
4 0
3 years ago
Read 2 more answers
How can you tell from the name the types of bonds present in a hydrocarbon?
Darya [45]

Answer:

Alkane

Alkene

Alkyne

Explanation:

Alkane=1 bond (Saturated hydrocarbon)

Alkene= 2 bonds (Unsaturated hydrocarbon)

Alkyne= triple bonds (Unsaturated hydrocarbon)

Formula of Alkane = CnH2n+2

Formula of Alkene = CnH2n

Formula of Alkyne = CnH2n-2

7 0
4 years ago
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