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3 years ago

If gold is selling presently for $1000.00/oz how much would 1 cubic inch of gold be worth?

Chemistry

1 answer:

KatRina [158]3 years ago

6 0

Answer:

$89.69

Explanation:

$1000 = 1 oz = 28.3g

volume = mass/density

volume = 28.3/19.3 = 1.47cm³

1 inch= 2.54 cm

1 cubic inch = (2.54)³ = 16.39 cm³

16.39/1.47 = 11.15 cubic inch

11.15 cubic inch = $1000

1 cubic inch = 1000/11.15 = $89.69

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How many ml of concentrated hydrochloric acid would be required to make 1 L of a 0.2 M solution? Assume that concentrated hydroc

fgiga [73]

Answer: The volume of concentrated hydrochloric acid required is 16.53 mL

Explanation:

To calculate the volume of concentrated solution, we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the concentrated solution

$M_2\text{ and }V_2$ are the molarity and volume of diluted solution

We are given:

Conversion factor: 1 L = 1000 mL

$M_1=12.1M\\V_1=?mL\\M_2=0.2M\\V_2=1L=1000mL$

Putting values in above equation, we get:

$12.1\times V_1=0.2\times 1000\\\\V_1=16.53mL$

Hence, the volume of concentrated hydrochloric acid required is 16.53 mL

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3 years ago

Which isotope has the greatest number of protons?

tino4ka555 [31]

Answer:

The isotope with the greatest number of protons is:

option D: Pu-239, with 94 protons

Explanation:

The number of protons is the atomic number and is a unique number for each type of element.

You can tell the number of protons searching the element in a periodic table and reading its atomic number.

Thus, this is how you tell the number of protons or each isotope

Sample Chemical symbol Element atomic number # of protons

A Pa-238 Pa protactinium 91 91

B U-240 U uranium 92 92

C Np-238 Np neptunium 93 93

D Pu-239 Pu plutonium 94 94

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3 years ago

Which of the following are quantized? A) canned soup from the grocery store b) the weight of jelly beans c) elevation of a perso

alisha [4.7K]

Both b) the weight of jelly beans and c) elevation of a person on a ramp

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3 years ago

What is the answer?

Dmitry_Shevchenko [17]

as a heterogeneous mixture

Explanation:

because I just know that it is

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3 years ago

Is a mixture of toys a substance or homogeneous and heterogeneous mixture

Aleonysh [2.5K]

Answer:

homogeneous

Explanation:

one type of molecules

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3 years ago