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3 years ago

1. All of the “stuff" in the universe is made from

Chemistry

1 answer:

sattari [20]3 years ago

3 0

All of the “stuff” in the universe is made from B. Matter

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CHEM HELP!

sweet [91]

So let's convert this amount of mL to grams:

$\frac{13.6g}{1mL}*1.2mL=16.32g$

Then we need to convert to moles using the molar weight found on the periodic table for mercury (Hg):

$\frac{1mole}{200.59g}*16.32g=8.135*10^{-2}mol$

Then we need to convert moles to atoms using Avogadro's number:

$\frac{6.022*10^{23}atoms}{1mole} *[8.135*10^{-2}mol]=4.90*10^{22}atoms$

So now we know that in 1.2 mL of liquid mercury, there are $4.90*10^{22}atoms$ present.

4 0

4 years ago

Can someone help me please

mr_godi [17]

Answer:

health issues and physical encounters

4 0

3 years ago

Alveoli are tiny sacs of air in the lungs. Their average diameter is 4.50 × 10−5 m. Calculate the uncertainty in the velocity of

Arisa [49]

<u>Answer:</u> The uncertainty in the velocity of oxygen molecule is $4.424\times 10^{-5}m/s$

<u>Explanation:</u>

The diameter of the molecule will be equal to the uncertainty in position.

The equation representing Heisenberg's uncertainty principle follows:

$\Delta x.\Delta p=\frac{h}{2\pi}$

where,

$\Delta x$ = uncertainty in position = d = $4.50\times 10^{-5}m$

$\Delta p$ = uncertainty in momentum = $m\Delta v$

m = mass of oxygen molecule = $5.30\times 10^{-26}kg$

h = Planck's constant = $6.627\times 10^{-34}kgm^2/s^2$

Putting values in above equation, we get:

$4.50\times 10^{-5}m\times 5.30\times 10^{-26}kg\times \Delta v=\frac{6.627\times 10^{-34}kgm^2/s}{2\times 3.14}\\\\\Delta v=\frac{6.627\times 10^{-34}kgm^2/s^2}{2\times 3.14\times 4.50\times 10^{-5}m\times 5.30\times 10^{-26}kg}=4.424\times 10^{-5}m/s$

Hence, the uncertainty in the velocity of oxygen molecule is $4.424\times 10^{-5}m/s$

8 0

3 years ago

Everyone in Mrs. Blaylock's science class must perform an experiment for the science fair this year. To begin this process, Mrs.

olga_2 [115]

How does the position of the Sun, moons, planets and stars affect a person's personality traits and daily behavior patterns

Explanation:

The question that cannot be answered scientifically from the given choices is "how does the position of the Sun, moons, planets and stars affect a person's personality traits and daily behavior patterns".

This problem is off the jurisdiction of natural science.

Scientific questions are usually empirical in nature and draws relationship between two variables.
Usually, one variable changes and the other is affected.
This problem stated is subjective and not scientific.
Humans have a wide range of personality traits.
This problem can be solved using a psychological analysis.

learn more:

Scientific process brainly.com/question/5003338

#learnwithBrainly

7 0

4 years ago

Name 3 things that rainforest and deserts have in common

Arturiano [62]

Some similarities between deserts and rainforests are that they support complex ecosystems, are powered by the sun/photosynthetic plants, are dangerous/mostly uninhabitable for humans, due to both conditions and wildlife, and are found mostly in the tropics

3 0

3 years ago

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