can somebody please help me here ? i wanna make sure of my answer..

Answer: All the processes involve the release of heat.

Explanation: Note to self

Condensation, freezing and deposition release energy.

Evaporation, melting and sublimation absorb energy.

So if you have such a question first identify which process is taking place.

Answer: Pretty sure they got murdered.

Explanation:

Answer:

In order for something to be scientific it needs to be:

a) observable

b) replicable;

c) falsifiable,

d) testable

Explanation:

A) Science does not deal with non-obserbale or faith based phenomena. If it's not observable, it probably imaginary, therefore unscientific.

B) a scientists must be able to replicate phenomena under controlled environments in order to study it more closely.

C) a scientific phenomena must allow for the formation of a hypothesis. That is, if it is scientific, then the phenomena should allow for an explanation (no necessarily the right one) to be postulated at an experiment

D) the hypothesis surrounding the scientific pheonomena must be testable.

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Answer:

             0.045 L  or 45 mL

Explanation:

Moles = Mass/M.Mass

Moles = 10 g / 109.94 g/mol

Moles = 0.09 moles

Also,

Molarity = Moles / Vol in L

Or,

Vol in L = Moles / Molarity

Vol in L = 0.09 mol / 2 mol/L

Vol in L = 0.045 L

1mol of Ba contains

\(\\ \sf\longmapsto 6.023\times 10^{23}atoms\)

No of moles in 17atoms

\(\\ \sf\longmapsto \dfrac{No\:of\:atoms}{Avagadro\:no}\)

\(\\ \sf\longmapsto \dfrac{17}{6.023\times 10^{23}}\)

\(\\ \sf\longmapsto 2.82298\times 10^{-23}mol\)

Option 2

Answer:

C on edg.

Explanation:

Answer:

first answer is C ,second answer is A

Explanation:

The importance of the O₂ and CO₂ is the O₂  is used for respiration in all living things. CO₂ is greenhouse gas.

The O₂  is used for respiration in all living things. CO₂ is greenhouse gas.  In respiration the O₂ plays an very important . the O₂ helps the organism to grow and reproduce. human needs oxygen for breathing. The importance of the O₂ and CO₂ dissolve in water is very important for aquatic life. The CO₂ is very important for the regulation of the earth's temperature.

Thus, the O₂ and CO₂ gas plays a very vital role in the life of living thing.

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Answer:

Q = 33105.6 J

Explanation:

Given that,

Mass of water, m = 88 grams

The temperature raised from 48°C to steam at 138°.

We need to find the energy required to raise the temperature. The formula for the energy required is given by :

\(Q=mc\Delta T\)

Where

c is specific heat of water, c = 4.18J/g °C

So,

\(Q=88\times 4.18\times (138-48)\\\\Q=33105.6\ J\)

So, the required energy is 33105.6 J.

A vehicle traveling at a speed of 12.5 m/s is equivalent to  4.171 x 10⁻⁸ light years per year.

To convert a speed from meters per second to light years per year, we need to use conversion factors.

1 light year = 9.461 x 10¹⁵ meters

1 year = 31,536,000 seconds

So, to convert 12.5 m/s to light years per year using the conversion factor, 1 year = 31,536,000 seconds:

12.5 m/s = 12.5 x 31,536,000 m/year

12.5 m/s = 3.9468 x 10⁸ m/year

Now, we can convert meters per year to light years per year using the conversion factor 1 light year = 9.461 x 10^15 meters:

3.9468 x 10⁸ m/year = (3.9468 x 10^8 m/year) / (9.461 x 10^15 m/light year)

3.9468 x 10⁸ m/year = 4.171 x 10⁻⁸ light years per year

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Answer:

A comet

Explanation:

Comets  travel so fats through the solar system that they melt which give them their glowy tail

Answer:..A.) Each chlorine atom shares a pair of electrons with the sulfur atom

Answer:140 grams of N2 are made.

Explanation:

15 mol CuO x (1 mol N2 / 3 mol CuO) = 5 moles of N2.

5 mol N2 x (28 g N2 / 1 mol N2) = 140 grams of N2.

Answer:

The balanced chemical equation is:

Mg + 2 HCl ➞ MgCl2 + H2

From the equation, we see that 1 mole of Mg reacts with 2 moles of HCl. So, to determine how many moles of Mg reacted with 2.26 moles of HCl, we divide 2.26 moles by 2:

2.26 moles HCl / 2 = 1.13 moles Mg

Now we can use the molar mass of Mg to convert moles of Mg to grams:

1.13 moles Mg x 24.31 g/mol = 27.49 grams Mg

Therefore, if 2.26 moles of HCl were reacted, then 27.49 grams of Mg were used in the reaction.

I Hope This Helps!

Surface tension is a liquid characteristic that accounts for why acetone does not form beads on a windshield but water does.

The amount of force necessary to separate a liquid's surface is measured by its surface tension. High surface tension is caused by the attraction of water molecules to one another rather than to the surface they are in contact with. As a result of this attraction, water molecules limit their contact with the surface area, generating droplets with a high contact angle, which cause water to bead up on hydrophobic surfaces like a windshield. Acetone spreads out on surfaces rather than forming droplets due to its lower surface tension than water, which lowers the contact angle.

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Answer:

D. all of these

Explanation:

In the classification of organisms, they are placed into groups which they appropriately fit into.

All the choices given correctly shows the process of classifying organisms. This aspect of biology is described as taxonomy.

The correct abbreviation for each metric unit is:

Kilogram - kg, Milliliter - ml, Kilometer- Km, Meter- m, Millimeter - mm, Centimeter - cm, Gram - g,  Liter - L, and Milligram - mg.

The metric system can be described as a system of measurement that succeeded the decimalized system based on the meter.  Each of the fundamental dimensions can be expressed by a single base unit of measure.

For quantities derived from the base units of the system, units derived from the base units are used such as the square meter being the derived unit for the area, a quantity derived from length.

Metric units can be described as units based on the meter, gram, or second and decimal multiples or sub-multiples of these. The units of the International System of Units (SI). By extension, they involve units of electromagnetism from the CGS units and SI units systems.

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Answer:

Give a brief question

Not an awful question

the Lewis dot diagram for lithium is

Answer:

kurissso pogosiposyoo

Answer

7.53% 97% if you divide it you can get the answer

Explanation:

Answer:

He has two protons

Li electron has one electron in its outermost orbital.

Number of neutrons of nitrogen = seven neutrons

The second shell of boron: 3 electrons.

Explanation:

An atom is composed of electrons, protons and neutrons. The number of neutrons is determined by subtraction of the atomic number from the mass number.

The electronic configuration is already known for each of atoms in these questions according to standard tables.

Answer:

1.) Make a He atom with a mass of 4. How many protons did you put in the nucleus?

2

2.) Make a Li atom with a mass number of 7. How many electrons did you place in the outermost orbital (ring)?

1

3.) Make a N atom with a mass number of 14. How many neutrons are in the nucleus?

7

4.) Make a B atom with a mass number of 11. How many electrons did you put in the second orbital (ring)?

3

Explanation:

Did it on Edgenuity and got it correct (2020).

The correct statements are that a rock is considered an ore when it contains at least one metallic mineral in sufficient amounts to be extracted profitably and when it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably.

When it contains at least one metallic mineral in sufficient amounts to be extracted profitably.

When it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably.

Step-by-step explanation:

When it occurs in sufficient amounts to be used to build roads and buildings: This statement is incorrect. Rocks that are used for construction purposes, such as limestone or sandstone, are not considered ores unless they also contain economically valuable minerals.

Only when it contains lead: This statement is incorrect. Ores are not limited to containing only lead. Ores can contain various metallic minerals, not just lead.

When it contains at least one metallic mineral in sufficient amounts to be extracted profitably: This statement is correct. Ores are rocks that contain valuable metallic minerals in concentrations that make extraction economically feasible. These minerals can include gold, silver, copper, aluminum, zinc, and many others.

Only when it contains iron: This statement is incorrect. While iron ores are commonly known and widely used, ores are not limited to containing only iron. There are numerous other metallic minerals that can be extracted profitably from rocks.

When it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably: This statement is correct. Fluorite and sulfur are examples of non-metallic minerals that can be extracted profitably from rocks, and if a rock contains these minerals in sufficient quantities, it can be considered an ore.

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Genetic engineering improved the lives if individuals with insulin because it helps the body use and store sugar, since people with diabetes can't produce insulin.

Silicate minerals are found in  Earth have more of, it is found in the mantle.

What is silicate minerals ?

Tetrahedra that are confined together are separated by positive charges. Olivine is a prime example. They are connected by positive charges, like those seen in tourmaline, and are known as ringed tetrahedra. Similar to the pyroxene family, tetrahedra share oxygen with two of their neighbors. The amphibole family is a good example of a double chain or ribbon. When three neighboring molecules share an oxygen atom, as in the case of mica and clay minerals, silica sheets are formed. Framework with a three-dimensional structure made up of four oxygen atoms connected to other tetrahedra like quartz and feldspar.

What is mantle ?

The Earth's mostly solid interior is known as the mantle. The planet's mantle lies between its thin crust and its solid, incredibly heated core. The Earth's mantle, which is about 2,900 kilometres (1,802 miles) thick, makes up an astounding 84% of the planet's overall volume.

Therefore, Silicate minerals are found in  Earth have more of, it is found in the mantle.

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Answer:

C

Explanation:

Answer:due to unequal heating

Explanation: