2 years ago

What volume will 50.2 grams of co2 (g) occupy at stp?

1 answer:

8 0

Number of moles of CO2 =
Mass /Ar
= 50.2 / (12 + 32)
1.14 mols

For every 1 mol of gas, there will be
24000 cm^3 of gas

Vol. = 1.14 x 24 dm^3
= 27.36 dm^3

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The blue color in some fireworks occurs when copper(I) chloride is heated to approximately 1500 K and emits blue light of wavele

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Given that,

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To find,

The energy of one photon of this light.

Solution,

We know that, the energy of a photon is given by the formula as follows :

$E=\dfrac{hc}{\lambda}\\\\E=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{4.5\times 10^2\times 10^{-9}}\\\\=4.42\times 10^{-19}\ J$

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2 years ago

Fill in the blanks with the word that best completes each statement. Scientists develop knowledge by making ------------about th

kotegsom [21]

Answer:

1. observations

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Observations are made, Hypothesies are formed from observations, and experimnets help alter and comfirm hypothesis.

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2 years ago

A laboratory utilizes a mixture of 10% dimethyl sulfoxide (DMSO) in the freezing and long-term storage of embryonic stem cells.

Mars2501 [29]

Answer:

The correct answer is "1.0100".

Explanation:

Let the volume of mixture be 100 ml.

then,

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= $\frac{101.004}{100}$

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2 years ago

(f) what is the observed rotation of 100 ml of a solution that contains 0.01 mole of d and 0.005 mole of l? (assume a 1-dm path

never [62]

<span>Answer: .01 moles of D to .005 moles of L ~ so, .01+.005 = .015 total; using this total value, divide the portions of D and L. so .01/.015 to .005/.015 ~ 67% D to 33% L. And thus, the enantiomer excess will be 34%.</span>

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2 years ago

Read 2 more answers

The distance between the atoms of H−I is 1.61Å. What is the distance in meters?

frosja888 [35]

<span>the answer is
1A = 10^-10 m
so </span>1.61Å = 1.61 x 10^-10 m
he distance between the atoms of H−I is 1.61 x 10^-10 m

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2 years ago