what is the mass number? plz help!

Answer:

when the altitude increases the temperature decreases. it's happens because the pressure changes(below the stratosphere)

Explanation:

+altitude------> - pressure(ar above us)---> -temperature

Answer:

In order to develop a healthy, working hypothesis it's best to work within the lines of: If _______, Then ______, as an act of if, being the input (independent) variable and then being the output (dependent).

Answer:

Copy and paste "Electromagnetic waves are categorized according to their frequency f or, equivalently, according to their wavelength λ = c/f.  Visible light has a wavelength range from ~400 nm to ~700 nm.  Violet light has a wavelength of ~400 nm, and a frequency of ~7.5*1014 Hz.  Red light has a wavelength of ~700 nm, and a frequency of ~4.3*1014 Hz." into google, and the correct website pops up as the first result.

Explanation:

I tried to link the website that I use to convert wavelengths and frequencies into types of light, but it deleted my answer, so I guess we're doing it this way. As for converting the wavelength to energy, the same principles apply as before:

Frequency: ν       Wavelength: λ       Energy: E       Speed of light: C (3.00e8)       Planck's Constant: h (6.626e-34)

ν -> λ    λ = C/ν

λ -> ν    ν = C/λ

For either of these equations, wavelength must be converted to meters or nanometers, depending on the equation.

For ν -> λ, after doing the equation, convert the wavelength into nanometers by dividing by 1e-9.

For converting λ -> ν, convert the wavelength into meters by multiplying by 1e-9.

For energy: E = hν = hc/λ

Answer:

include all compounds.

Answer:

CO2 is a pure compound

Explanation:

Element non examples include all compounds, which are substances made when two different types of atoms form a chemical bond. Any material made by mixing elements is no longer an element. Anytime you see a chemical formula with more than one element symbol in it, it's an element non example.Pure elements are Substances which are made up of only one kind of atom. Air is a mixture of element and compound whereas alcohol in water is a mixture of compounds. CO2 is a pure compound and not an element.

Answer:

Alkali metals

hope it helps

Answer:

The answer is 15 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density of Chloroform = 1.5 g/ml

volume = 10 mL

We have

mass = 1.5 × 10

We have the final answer as

Hope this helps you

answer : the correct option is, (B) 2, 3 and 6.

Answer:

b

Explanation:

i took the test

Answer:

the cheta

Explanation:

kinetic means movement

Answer:

it doesnt even give you enough information for you to answer it

Explanation:

Answer:

it doesnt even give you enough information for you to answer it

Explanation:

Answer:no

Explanation:as long as it’s not too much of it then no , it’s not bad . food coloring gets tested to be safe for human consumption so you’re good

Food coloring should be edible and safe on food (hence the name). If it's safe on food, then it should be safe to drink with water. Of course check with the label to be sure.

Answer:

malleability

Explanation:

Answer:

The answer is Malleabillity

Explanation:

I took the test and got a 100% on Edge

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Answer:

A microhabitat is a small or localized ecosystem in a larger ecosystem where a range of small populations of plants and animals sustain and main a micro-ecosystem.

Rotting or decomposing log is an example of the microhabitat as it provides food shelter, and various plants and organisms found and interact to make it an ecosystem. There are also interactions between biotic and abiotic factors. Many other characteristics present in this small ecosystem as given in the question.

A microhabitat is a small or localized ecosystem in a more extensive ecosystem a range of small populations of plants, animals sustain main a micro-ecosystem.

A rotting or decomposing log is an illustration of a microhabitat as it nourishes food shelter, and different plants and organisms found and interact to create an ecosystem. There are also interchanges between biotic and also abiotic factors. Multiple different characteristics are present in this small ecosystem as given in the question.

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Answer:

observation

Explanation:

hope it is correct

Answer:

Inference science

Explanation:

Your inferring that the horse is hungry. The word 'probably' infers that the horse may be hungry.

The thick soil accumulation of fine-grained particles is called as silt

Answer:

longer, greater;

Explanation:

This is more of a physics question. Refer to any notes you might have on simple machines. In short though, a wrench with a longer handle requires less force to be used than a wrench with a short handle. As a result it has more mechanical advantage.

The answer "shorter, less " could also be correct but it's listed twice so I wouldn't pick it.

Answer:

long,great

Explanation:

Examples include storage polysaccharides such as starch, glycogen and galactogen and structural polysaccharides such as cellulose and chitin. Here's the answer, but I think it's A

The mass of a cube of magnesium : 322.2 g

Density is a quantity derived from the mass and volume

Density is the ratio of mass per unit volume

The unit of density can be expressed in g / cm³ or kg / m³

Density formula:

[tex]\large{\boxed {\bold {\rho~=~ \frac {m} {V}}}}[/tex]

ρ = density , g / ml

m = mass , g

v = volume , ml

mass of aluminum = 500 g

density of aluminium = 2.7 g/ml

there is data that needs to be added⇒ density of magnesium : 1.74 g/ml

the same dimensions = the same volume

[tex]\tt V=\dfrac{m}{\rho}\\\\V=\dfrac{500}{2.7}=185.19~ml[/tex]

V magnesium = V aluminum

[tex]\tt m=\rho\times V\\\\m=1.74\times 185.19\\\\m=\boxed{\bold{322.2~g}}[/tex]

The cube of same dimensions of magnesium and aluminum have same volume. The mass of cube of magnesium has been 321.85 grams.

The density has been given as the mass of substance per unit volume. The density of aluminum cube has mass 500 grams, and density 2.7 g/mL. The volume of the aluminum cube has been:

[tex]\rm Density=\dfrac{Mass}{Volume}\\\\2.7\;g/mL=\dfrac{500\;g}{Volume} \\\\Volume=185.18\;mL[/tex]

The volume of the magnesium and aluminum cube has been the same. The density of magnesium has been 1.735 g/mL. Thus, the mass of Mg cube has been given as:

[tex]\rm 1.738\;g/mL=\dfrac{Mass}{185.18\;mL}\\\\ Mass=321.85\;g[/tex]

Thus, the mass of magnesium cube has been 321.85 grams.

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Answer:

True

Explanation:

Volume is measured in "cubic" units. The volume of a figure is the number of cubes required to fill it completely, like blocks in a box. Volume of a cube = side times side times side. Since each side of a square is the same, it can simply be the length of one side cubed.

Answer: Atoms aren't entirely empty space

Explanation:

Rutherford did his scatter experiment to disprove Thomson's Plum Pudding Model. Rutherford shot helium nuclei at a sheet of gold and expected the particles to all go straight through to a sensor. The reason he expected this was because Thomson said that atoms are mostly made of empty space. Not all the particles went through the gold sheet, a lot of them actually reflected back to him. This meant that atoms aren't entirely empty space and something had to deflect the helium nuclei

Answer: 2.856km

Explanation: 1000m = 1km

2856m / 1000 = 2.856km

answer

the answer is C

explanation

this is because the oxygen makes up 46.1%of the earth's surface while silcon is 28.5% and the question says "what makes up" which means you should add them and it becomes 74.6% which Is approximately 75%

Answer:

Na has the most similar configuration.

Explanation:

Na electron configuration: 1s²2s²2p⁶3s¹ or [Ne] 3s₁

Mg electron configuration: 1s²2s²2p⁶3s² or [Ne] 3s²

Be electron configuration: 1s²2s² or [He] 2s²

This is because Na and Mg are right next to each other in the same period (horizontal).

Answer:

Na has the most similar configuration. Na electron configuration: 1s²2s²2p⁶3s¹ or [Ne] 3s₁. Mg electron configuration: 1s²2s²2p⁶3s² or [Ne] 3s². Be electron configuration: 1s²2s² or [He] 2s². Na and Mg are right next to each other in the same period

Answer:

Hydrogen is the smallest chemical element. It has one proton and one electron, making it neutral. However, the ions of hydrogen atom are charged species. Thus, the key difference between hydrogen atom and hydrogen ion is that the hydrogen atom is neutral whereas hydrogen ion carries a charge.

Answer:

A normal hydrogen (H) atom does not have any neutrons in its tiny nucleus. That tiny little atom (the tiniest of all) has only one electron and one proton. You can take away the electron and make an ion, but you can't take away any neutrons.

Explanation:

Answer:

Suspension!

Explanation:

A suspension is a heterogeneous mixture in which the solute particles do not dissolve, but get suspended throughout the bulk of the solvent, left floating around freely in the medium. The other answers are homogeneous, not heterogenous.

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Electrons in pi bonds can spread over a group of atoms. This is what is meant by delocalization of a pi bonded network.

There are two kinds of bonds in chemistry, these are;

Sigma bonds are formed by end to end overlap of atomic orbitals while pi bonds are formed by side by side overlap of atomic orbitals.

Sometimes, pi orbitals are well oriented in such a way that electrons are spread over the pi orbitals of several atoms. For instance, in benzene, there are six pi electrons that are spread over the six carbon atoms in benzene. This is what is meant by delocalization.

Delocalization can only occur when there is are conjugated double bond. This is why delocalization is common in many aromatic compounds. Some inorganic ions such as CO3^2- also have delocalized pi electrons.

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Answer:

10.1389

Explanation: