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3 years ago

What does it mean for an object to be dense?

Chemistry

1 answer:

Sedbober [7]3 years ago

4 0

Answer: Density is a measure

Explanation: The more squashed together an object’s particles are, the denser it is.

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A sample of 0.0860 g of sodium chloride is added to 30.0 mL of 0.050 M silver nitrate, resulting in the formation of a precipita

Grace [21]

Answer:

0.21 g

Explanation:

The equation of the reaction is;

NaCl(aq) + AgNO3(aq) -----> NaNO3(aq) + AgCl(s)

Number of moles of NaCl= 0.0860 g /58.5 g/mol = 0.00147 moles

Number of moles of AgNO3 = 30/1000 L × 0.050 M = 0.0015 moles

Since the reaction is 1:1, NaCl is the limiting reactant.

1 mole of NaCl yields 1 mole of AgCl

0.00147 moles of NaCl yields 0.00147 moles of AgCl

Mass of precipitate formed = 0.00147 moles of AgCl × 143.32 g/mol

= 0.21 g

3 0

2 years ago

A common radio wavelength observed coming from astronomical objects is 21 cm. What temperature is associated with this radiation

qaws [65]

Answer:

The temperature associated with this radiation is 0.014K.

Explanation:

If we assume that the astronomical object behaves as a black body, the relation between its wavelength and temperature is given by Wien's displacement law.

$\lambda_{max}=\frac{b}{T}$

where,

λmax is the wavelength at the peak of emission

b is Wien's displacement constant (2.89×10⁻³ m⋅K)

T is the absolute temperature

For a wavelength of 21 cm,

$T=\frac{b}{\lambda _{max} } = \frac{2.89 \times 10^{-3} m.K }{0.21m} =0.014K$

8 0

3 years ago

How might the eruption of a large volcano affect weather for years to come

netineya [11]

The ashes released from the volcano could lead to acid rain and ash clouds.

3 0

3 years ago

How many moles of helium atoms are there in

fredd [130]

a is the correct answer .

2.4 × 10^24

6 0

3 years ago

*14. How many atoms of sulfur are in 0.75 moles of carbon disulfide?

Sedbober [7]

The answer is 14 i did

5 0

3 years ago