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aliya0001 [1]
3 years ago
11

¿Qué masa tiene un cuerpo que cuando se le aplica una fuerza de 20N se acelera 4m /s2?

Chemistry
2 answers:
PIT_PIT [208]3 years ago
6 0

Answer:

5kg?

Explanation:

xxTIMURxx [149]3 years ago
5 0

Answer:

La respuesta es 5 kg

Explanation:

f/a=m

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Sodium hydroxide (NaOH) and elemental sodium (Na)
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If the question is which can make a buffer, then NH3, NH4Cl should be correct. Because Ammonium (NH4) is conjugate acid of NH3 so they can form an equilibrium which is basically a buffer whose purpose is to resist pH change.

Explanation:

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What type of charge does each part of an atom have (positive, negative, no charge)
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P-positive
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294 g of potassium dichromate contains 52 g of chromium and 39 g of potassium. What is the mass percent of oxygen in the compoun
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69.047% is the answer to this question
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Calculate the molality of isoborneol in the product if, a) the melting point of pure camphor is 179°C and the melting point take
tresset_1 [31]

Answer:

The molality of isoborneol in camphor is 0.53 mol/kg.

Explanation:

Melting point of pure camphor= T =179°C

Melting point of sample = T_f = 165°C

Depression in freezing point = \Delta T_f=?

\Delta T_f=T- T_f=179^oC-165^oC=14^oC

Depression in freezing point  is also given by formula:

\Delta T_f=i\times K_f\times m

K_f = The freezing point depression constant

m = molality of the sample

i = van't Hoff factor

We have: K_f = 40°C kg/mol

i = 1 (  organic compounds)

\Delta T_f=14^oC

14^oC=1\times 40^oC kg/mol\times m

m=\frac{14^oC}{1\times 40^oC kg/mol}=0.35 mol/kg

The molality of isoborneol in camphor is 0.53 mol/kg.

8 0
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