i need help to pass my class

The geometry of PBr₃ is trigonal pyramidal. Therefore, option A is correct.

Trigonal pyramidal geometry refers to the molecular geometry around a central atom in a molecule or ion where there are three bonded atoms and one lone pair of electrons. This geometry is commonly found in molecules with a central atom surrounded by three bonding pairs and one non-bonding pair of electrons.

The term "trigonal" refers to the arrangement of the three bonding pairs, which are positioned in a flat, triangular shape around the central atom. The term "pyramidal" indicates that the lone pair of electrons occupies the fourth position, giving the molecule a three-dimensional pyramid-like shape.

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Answer:

x100.

Explanation:

Na2CO3 (aq) + CaCl2(aq) → CaCO3 (s) + 2 NaCl (aq)

For example, if we use 2.00 g CaCl2 x 1 mole = 0.0180 mole CaCl2

111 g CaCl2

and mix it with 2.00 g Na2CO3 x 1 mole = 0.0189 mole Na2CO3

106 g.

AB + CD → CB + AD, where A and C are cations and B and

D are anions

Answer:

x100 this is the answer I didn't do explanation sorry for that

Answer:

I believe it's qualitative and continuous.

Explanation:

Answer:

Continuous, and Quantitative

Hope this helps :)

Answer:

V= 12mL

Explanation:

you had the right idea with your Significant figures however, when we divide we see that it requires 2 significant figures as our least amount. this is because when looking at our division, 62 has 2 sig. fig. while 5.35 has a total 3. when looking at your answer we see that you had a total of 3 sig. figures. so in actuakity you had to round up to 12 and not to the tenths because the decimal makes .6 count as your third sig fig.

Answer:

7.11 x [tex]10^{14}[/tex] Hz

Explanation:

The equation for converting wavelength to frequency is ν=c/λ, or the speed of light over wavelength. The speed of light is 3.00 x [tex]10^{8}[/tex], and our wavelength here is 422 x [tex]10^{-9}[/tex]. All we have to do now is substitute our given values:

[tex]\frac{3.00x10^{8} }{422x10^{-9}}[/tex]

After reduction, our answer comes out to be about 7.11 x [tex]10^{14}[/tex] Hz.

Explanation:

mass = desity × volume

volume = mass/density...

i believe thats right...

btw u means Physics formulae only..lol

Answer:

Ca

Explanation:

Answer:

A

Explanation:

Option B, Excretory System

Answer:

The first evidence of quantization in atoms was the observation of spectral lines in light from the sun in the early 1800s by Joseph von Fraunhofer and William Hyde Wollaston.

Explanation:

Answer:

no it's part of chemistry to play thing exploring OR not.

Explanation:

Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.

Answer:

Atomic # is 9

protons 9

neutrons: 10

electrons: 9

mass :18.n u

energy shells: 18

Neon is transparent opaque as it is light, colorless and order less inert noble gas.

Noble gas are defined as the element that belong to group 18 of the modern periodic table.

It is also known as inert gas or aerogene.

Noble gas are light, transparent, colorless and order less gases.

They are the group of six inert or non reactive gases.

Noble gases are odorless, colorless, nonflammable gases with negligible chemical reactivity.

Noble gases are exceedingly stable and unlikely to form chemical bonds due to their complete valence electron shells, which have no tendency to add or lose electrons.

Noble gas were originally classified as group 0 in the periodic table because it was thought they had a valence of zero, which means their atoms could not mix with those of other elements to form compounds.

Thus, Neon is transparent opaque as it is light, colorless and order less inert noble gas.

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Answer:

0.03262841

I tried, hope this helps :)

Answer:

0.032 lbs

Explanation:

Divide the mass value by 454.

Answer:

the large object moving quickly because the more the mas the more kenetic energy

Answer:

[Rn]7s25f14

Explanation:

[tex][Rn]5f^{14}7s^2[/tex] is the electron configuration for nobelium (No).

Explanation:

Given:

The element nobelium.

To find:

The electronic configuration of nobelium

Solution:

The atomic number of nobelium is 102.

The number of protons = Atomic number = 102

The number of electrons = Number of protons = 102

There are 102 electrons in atom nobelium and they will be filled according to the Aufbau rule that the electron will be filled in a subshell with lower orbital energy.

The electronic configuration of nobelium :

[tex][No]=1s^22s^22p^63s^23p^63d^{10}4s^24p^64d^{10}5s^25p^64f^{14}5d^{10}6s^26p^65f^{14}7s^2[/tex]

Or we can also write the above electronic configuration as:

[tex][No]=[Rn]5f^{14}7s^2[/tex]

[tex][Rn]5f^{14}7s^2[/tex] is the electron configuration for nobelium (No).

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Answer:

67 kg = 67 kg × 1×10⁶ mg / 1 kg

67 kg = 6.7×10⁷ mg.

Explanation:

The following data were obtained from the question:

Mass in Kg = 67 kg

Mass in mg =.?

Thus, we can obtain the mass in milligrams (mg) as follow:

1 kg = 1×10⁶ mg

Therefore,

67 kg = 67 kg × 1×10⁶ mg / 1 kg

67 kg = 6.7×10⁷ mg

Therefore, 67 kg is equivalent to 6.7×10⁷ mg

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass of metal = 10.5 g

volume = 13 cm³

We have

[tex]density = \frac{10.5}{13} \\ = 0.8076923...[/tex]

We have the final answer as

Hope this helps you

Answer:

0.807

Explanation:

mass/volume = density

10.5/13 = 0.807

Answer:

FALSE

Explanation:

A man have to get their friend bond with someone they like a lot closer. Then, if the man is ready to confess his feeling, try buying his love of his life their favorite flower or favorite candy/food.

hope this help-(even though im a girl ;v;)

Answer: True

Explanation:

Tissues perform functions that are specializations of the normal function of individual cells.

Answer:

true

Explanation:

Answer:

8.75×10¹³ mg

Explanation:

From the question given above, we obtained:

Mass (in Kg) = 8.75×10⁷ Kg

Mass (in mg) =?

Next, we shall convert 8.75×10⁷ Kg to grams (g). This can be obtained as follow:

1 Kg = 1000 g

Therefore,

8.75×10⁷ Kg = 8.75×10⁷ Kg × 1000 g/1 kg

8.75×10⁷ Kg = 8.75×10¹⁰ g

Therefore, 8.75×10⁷ Kg is equivalent to 8.75×10¹⁰ g.

Finally, we shall convert 8.75×10¹⁰ g to mg. This can be obtained as illustrated below:

1 g = 1000 mg

Therefore,

8.75×10¹⁰ g = 8.75×10¹⁰ g × 1000 mg/ 1 g

8.75×10¹⁰ g = 8.75×10¹³ mg

Thus, 8.75×10⁷ Kg is equivalent to 8.75×10¹³ mg.

Answer:

If you pour a spoonful of salt into a glass of water, the sodium will react with the water and increase the mass.  

Explanation:

Answer:

  liquid

Explanation:

If there are no s-waves, the interior must be liquid, where s-waves cannot travel.

Answer:

C

Explanation:

Thermal energy from the fire move to the water in the form of heat.

Answer:

correct option C

Explanation:

Answer: When a combination reaction occurs between a metal and a non-metal the product is an ionic solid.

Explanation: Another hint(s): When magnesium burns in air, the atoms of the metal combine with the gas oxygen to produce magnesium oxide. This specific combination reaction produces the bright flame generated by flares.

Answer:

Activation energy, in chemistry, the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport.

Explanation:

Answer:

0.690666... g/cm^3

Explanation:

density=mass/volume. mass is 2.331 g and using the length we can determine that the volume of the cube is 3.375 cm^3. 2.331/3.375= 0.6906666....