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3 years ago

How many of the zeros in the measurement 0.050060 are significant

Chemistry

2 answers:

Feliz [49]3 years ago

6 0

I think 3 of them are its been 1 half years since ive done this i dont take chemistry anymore

earnstyle [38]3 years ago

6 0

3 of them are significant. Two are sandwiched by nonzero significant numbers and since there is a decimal in the number, the zero on the end is also significant

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Please help me i keep getting this wrong :(

solmaris [256]

A) A chandelier has been hanging in the kitchen for years
B) A log floats on top of the lake
C) You place your book on the top of a flat table

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3 years ago

A 5.0 milliliter sample of a substance has a mass of 12.5 grams. What is the mass of a 100 milliliter sample of the same substan

exis [7]

Answer:

It sould be 250 grams

Explanation:

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2 years ago

The combustion of 0.570 g of benzoic acid (ΔHcomb = 3,228 kJ/mol; MW = 122.12 g/mol) in a bomb calorimeter increased the tempera

torisob [31]

Answer:

The temperature change from the combustion of the glucose is 6.097°C.

Explanation:

Benzoic acid;

Enthaply of combustion of benzoic acid = 3,228 kJ/mol

Mass of benzoic acid = 0.570 g

Moles of benzoic acid = $\frac{0.570 g}{122.12 g/mol}=0.004667 mol$

Energy released by 0.004667 moles of benzoic acid on combustion:

$Q=3,228 kJ/mol \times 0.004667 mol=15.0668 kJ=15,066.8 J$

Heat capacity of the calorimeter = C

Change in temperature of the calorimeter = ΔT = 2.053°C

$Q=C\times \Delta T$

$15,066.8 J=C\times 2.053^oC$

$C=7,338.92 J/^oC$

Glucose:

Enthaply of combustion of glucose= 2,780 kJ/mol.

Mass of glucose=2.900 g

Moles of glucose = $\frac{2.900 g}{180.16 g/mol}=0.016097 mol$

Energy released by the 0.016097 moles of calorimeter combustion:

$Q'=2,780 kJ/mol \times 0.016097 mol=44.7491 kJ=44,749.1 J$

Heat capacity of the calorimeter = C (calculated above)

Change in temperature of the calorimeter on combustion of glucose = ΔT'

$Q'=C\times \Delta T'$

$44,749.1 J=7,338.92 J/^oC\times \Delta T'$

$\Delta T'=6.097^oC$

The temperature change from the combustion of the glucose is 6.097°C.

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2 years ago

What is wrong with this model of the atom.

sp2606 [1]

Answer:

A. The neutrons and electrons are in the wrong place.

Explanation:

The atom's nucleus contains both protons and neutrons, whilst the electrons are arranged in shells around the nucleus.

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2 years ago

How does the strength of a metallic bond compared to other types of bonds?

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3 years ago

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