CHEMISTRY HIGH SCHOOL

What is the percent of O in Cr2O3?

Answers

Answer 1
Answer:

Answer:

31.58

Explanation:


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HIGH SCHOOL

How do you convert 2.97 kg per L as grams per cubic centimeter?

Answers

1 kg/L = 1 gram/cubic centimeter
So, 2.97 Kg/L = 2.97 grams/cubic centimeter

Hope this Helps :)
HIGH SCHOOL

Subatomic particles can usually pass undeflected through an atom because the volume of an atom is composed of (1) an uncharged nucleus
(2) largely empty space
(3) neutrons
(4) protons

Answers

Subatomic particles can usually pass undeflected through an atom because the volume of an atom is composed of largely empty space. The correct option is (2).

What are subatomic particles?

Subatomic particles are those particles that are present inside the atoms. They are charged particles. They are electrons, neutrons, and protons. Subatomic particles constitute the atom.

Subatomic particles known as electrons constantly revolve around the atomic nucleus of every atom. These particles are the furthest from the atom's nucleus and are negatively charged in nature.

Protons and neutrons, for example, are subatomic particles that are found in the atom's nucleus. While neutrons don't have any net charge, protons are positively charged particles.

Thus, the correct option is (2) largely empty space.

To learn more about subatomic particles, refer to the link:

brainly.com/question/13303285

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The answer is 2> largely empty space
MIDDLE SCHOOL

What happens to the particles of a liquid as it vaporizes

Answers

The question is so simple but complicate .

As you know that when liquid is heat it turns to liquid but question is that what happened inside?

When temperature raised the liquid began to boil as a result the liquid particles moves randomly or vibrate and collides each other and produce internal energy when temperature reaches in a certain limit it will turn into gas form so gas will moves upward to the atmosphere and evaporate.

I hope you will understand better now so click below and tell me how was ans.

The liquid particles gain energy  and start to get "excited." This means they vibrate and eventually break away from the surface of the liquid and into the surrounding gas. This particle of matter is still present, but not in liquid form.

MIDDLE SCHOOL

What is the wavelength of a 147-g baseball traveling at 91.0 mph?

Answers

The formula to determine the wavelength is, De-Broglie wavelength formula:

     -(1)

where, is wavelength, m is mass, v is velocity and h is Planck's constant = =

mass, m = 147 g  (given)

Since, 1 g = 0.001 kg

So, 147 g = 0.147 kg

v = 91.0 mph    (given)

Converting mph to mps:

Since,

So, =

Substituting the values in formula 1:

Hence, the wavelength wavelength of a 147-g baseball traveling at 91.0 mph is

.


HIGH SCHOOL

Water intoxication occurs when

Answers

Water intoxication occurs when:
water is consumed in larger amounts without much electrolyte take in.

Answer:

A, the body’s electrolytes are out of balance

Explanation:

I just took the test

COLLEGE

Is the speed of radio wave radiation higher or lower than infrared radiation

Answers

the speed of radio wave radiation is lower than infrared radiation
HIGH SCHOOL

Which response includes only species that have the electron configuration 1s 2 2s 2 2p 6 3s 2 3p 6 , and no other species?

Answers

Answer:

Cl- K+ Ar and P-3

Explanation:

Hello!

From the electronic configuration we can count 18 electrons.

Na+ has 10 electrons  (11 - 1 = 10)

Cl- has 18 electrons  (17 + 1 = 18)

K+ has 18 electrons  (19 - 1 = 18)

Ar has 18 electrons

Mg+2 has 10 electrons  (12 - 2 = 10)

P-3 has 18 electrons (15 + 3 = 18)

The electrons in the neutral atom are equal to the atomic number.

Negative charges are earned electrons and are added to the atomic number of the element to calculate the total electrons.

The positive charges are assigned electrons and are subtracted from the element's atomic number to calculate the total electrons.

Successes with your homework!

HIGH SCHOOL

If 56.8 ml of bacl2 solution is needed to precipitate all the sulfate ion in a 554 mg sample of na2so4 (forming baso4), what is the molarity of the solution?

Answers

0.0687 m The balanced equation is BaCl2 + Na2SO4 ==> BaSO4 + 2 NaCl Looking at the equation, it indicates that there's a 1 to 1 ratio of BaCl2 and Na2SO4 in the reaction. So the number of moles of each will be equal. Now calculate the number of moles of Na2SO4 we had. Start by looking up atomic weights. Atomic weight sodium = 22.989769 Atomic weight sulfur = 32.065 Atomic weight oxygen = 15.999 Molar mass Na2SO4 = 2 * 22.989769 + 32.065 + 4 * 15.999 = 142.040538 g/mol Moles Na2SO4 = 0.554 g / 142.040538 g/mol = 0.003900295 mol Molarity is defined as moles per liter, so let's do the division. 0.003900295 mol / 0.0568 l = 0.068667165 mol/l = 0.068667165 m Rounding to 3 significant figures gives 0.0687 m
MIDDLE SCHOOL

During the winter months, the groundwater in an area freezes, the rivers freeze, and there is little sunlight available. Which of the following processes would allow plants to survive the winter conditions? A. hibernation B. dormancy C. migration D. pollination

Answers

The correct answer is B: dormancy. In response to unfavourable environmental conditions, such as over winter months, plants are able to enter a state of little to no growth, called dormancy. In addition to reducing or halting growth over dormancy periods, deciduous trees shed their leaves over winter, thereby avoiding water loss. Most trees also bud over spring and summer periods, when conditions are more favourable. 

Answer:

The freezing of groundwater and rivers makes water unavailable to plants. To survive the winter where there is little water and little sunlight, many plants become dormant. During dormancy, the plant stops growing. This allows the plant to conserve energy and survive the winter conditions.

Explanation:

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