can someone help me with this? thanks​

Answer:

its D I'm pretty sure because it's from high heat/pressure

Answer:

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Answer:

A to show that the mass of atoms in the product

Answer:

A) Separating funnel method

B) Simple Distillation

C) Evaporation

D) Sublimation

E) It is based on the principle of separation whereby even though two substances are dissolved in the same solvent, their respective solubilities could be different. Thus, the component that has more solubility will rise fastest and will therefore get separated from the mixture.

Explanation:

A)

B) Kerosene and petrol are both miscible liquids and the difference in their boiling point temperature is not more than 25°C. Thus, we make use of Simple distillation.

C) Can be separated by evaporation where the water is boiled and it evaporates and leaves the salt behind

D) To separate camphor from salt, we use sublimation so the camphor can change directly from solid to the gas state without passing through the liquid state.

E) Chromatography is used to separate components of a mixture.

It is based on the principle of separation whereby even though two substances are dissolved in the same solvent, their respective solubilities could be different. Thus, the component that has more solubility will rise fastest and will therefore get separated from the mixture.

Explanation:

[H+]=10^-pH

[H+]=10^-9.2

[H+]=6.031x10^-10

[OH-]=1x10^-14÷[H+]

[OH-]=1x10^-14÷[6.031x10^-10]

[OH-]= 1.66x10^-5

im pretty sure this is right

Answer:

reflection

Explanation:

wave reflection is when a sound bounces off something it cannot go through, like echoing

Answer: Yes they do;

Explanation:

Axons, the long projections of neural cells that make up our peripheral nervous system's nerves, are comparable to power wires in that they have dense electrical insulation and can easily transmit impulses from the body and signals from the brain to a toe, for example.

Answer: The spiny lobster belongs to the kingdom ANIMALIA while diatoms belongs to the kingdom PROTISTA.

Explanation:

There are different ways biologists have used to examine and describe million kinds of living organisms. To classify organisms into groups, biologist look for important features that are shared by a large variety of organisms. These features which should have similar origin, structure and position. Organisms with certain important features in common are then put together into one group.

In the hierarchy of living organisms, the largest group of organisms is the KINGDOM. There are five types of kingdoms in which organisms are grouped, these includes:

--> kingdom Monera

--> kingdom PROTISTA,

--> kingdom fungi,

--> kingdom plantae and,

--> kingdom ANIMALIA.

Kingdom PROTISTA: they are single-celled, motile or non-motile organisms that are made up of eucaryotic cells, that is,cell structure is complex with a definite nucleus. Member include the DIATOMS, amoeba and chlamydomonas.

Kingdom ANIMALIA: They are multiple-celled, motile organisms that feed on other organisms. Their cells have no cell walls. The members include the SPINY LOBSTER, corals,worms, snails and cows

Answer:

54.72 g

Explanation:

Mass = ?

Volume = 5.61 L

Pressure = 5.66 atm

Temperature = 311 K

The relationship between these equations is given by the ideal gas equation;

PV = nRT

where R = gas constant = 0.0821 atm L K-1 mol-1

n = PV / RT

n = 5.66 * 5.61 / (0.0821 * 311 )

n = 1.2436 mol

Number of moles = Mass / Molar mass

Mass = Number of moles * Molar mass = 1.2436 * 44 = 54.72 g

Answer:

Explanation:

Polar side chains tend to be present on the surface of a protein where they can interact with the aqueous environment found in cells. On the other hand, non-polar amino acids tend to reside within the center of the protein where they can interact with similar non-polar neighbors.

The curve in the given scenario is known as the meniscus. The correct option is B.

A graduated cylinder, also known as a measuring cylinder or mixing cylinder, is a piece of laboratory equipment that is commonly used to measure the volume of a liquid.

It is narrow and cylindrical in shape. The amount of liquid measured is represented by each marked line on the graduated cylinder.

A graduated cylinder is a piece of laboratory equipment used to measure the volume of liquids, chemicals, or solutions during the course of a day's work in the lab.

Graduated cylinders provide greater precision and accuracy than standard laboratory flasks and beakers.

The upward or downward curve seen at the top of a liquid in a container is known as the meniscus.

Thus, the correct option is B.

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Answer:

Bq

Explanation:

The number of decays per second, or activity, from a sample of radioactive nuclei is measured in becquerel (Bq), after Henri Becquerel. One decay per second equals one becquerel.

The radioactive decay has been measured as decay per second by becquerel (Bq).

Radioactive decay has been given as the loss of energy by the nucleus. The release of energy has been in the form of radiation. The varying energy radiations have been termed alpha decay, beta decay, gamma decay.

The decay has been performed by unstable nuclei with the emission of multiple particles. The decay unit has been given by Henri Becquerel. The unit has been the determination of the decay performed per second and has been given by becquerel (Bq).

Thus, the unit for the measurement of radioactive decay has been becquerel (Bq).

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Answer:

raising the Concentration of liquid

raise the temperature of the system

bubbles of hydrogen gas

Answer:

137.44g CO2

Explanation:

(1.88 × 10²⁴ / 6.02 × 10²³) × (16 + 16 + 12.01) = 137.44g

Answer:

Spot (4)  Has evidence that there were waves here at some point. It looks as if the sand/surface debris was moved back and forth, creating this pattern in the sand. Spots (5) and (7) show evidence of water erosion. The smooth edges of both hills mean that water once flowed through that area, carrying little pebbles and rocks that gradually shaped and smoothed those mounds. An example for this would be how there are smooth areas in the Grand Canyon where scientists have concluded that some, if not all, of the Grand Canyon was formed by flowing water. "Rapid uplift, cracking, and surface drainage of receding floodwaters provide both the path and the necessary volume of water to quickly carve out Grand Canyon," says scholars on icr.org.

Explanation:

Water Erosion exists.

2.2 x 10^-2

0.055 / 250 = 0.00022 - This would be 2.2 x 10^-4, but the question is asking for percent, not proportion, so multiply by 100% to get the percentage.

0.00022 * 100% = 0.022% = 2.2 * 10^-2

Answer:

Because of the earths rotation

Explanation:

But it appears to rise and set because of the Earth's rotation on its axis. It makes one complete turn every 24 hours. ... As the Earth rotates toward the east, it looks like the sun is moving west. As the Earth rotates, different locations on Earth pass through the sun's light.

Answer:

When the earth is rotating, it is rotating away and towards the sun which is why we have day and night

Explanation:

Answer:

10 watts

Explanation:

Power = Work / Time

Power = 330 J / 33 s

Power = 10 watts

Answer:

B. Electrons can move easily between copper atoms.

Explanation:

Explanation:

The reaction is CaCO

3

+2HCl→CaCl

2

+H

2

O+CO

2

.

Thus, 2 moles of HCl reacts with one mole of calcium carbonate to produce one mole each of calcium chloride, water and carbon dioxide respectively.

Hence, 3 moles of HCl will react with excess of calcium carbonate to produce 3×

2

1

=1.5 mol of carbon dioxide

Answer:

nine orbitals

Explanation:

There are nine orbitals in the n = 3 shell. There is one orbital in the 3s subshell and three orbitals in the 3p subshell. The n = 3 shell, however, also includes 3d orbitals.

Answer:

by wearing of rocks

Explanation:

earths gravity your welcome

Answer:

weathering of rocks is the answer to your question

Answer:

A- 3.0110 X 10^24

Explanation:

I took the quiz

The term mole concept is used here to determine the number of atoms of potassium. The number of atoms of potassium present in 195.49 grams is 3.011 × 10²⁴.

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is given as:

Number of moles of atoms (n) = Given mass / Gram atomic mass

The given mass of potassium =  195.49 g

The atomic mass of 'K' = 39.098 g

n = 195.49 / 39.098 = 5 mol

Number of atoms = Number of moles of atoms × 6.022 × 10²³

5 mol ×  6.022 × 10²³ = 3.011 × 10²⁴

Thus the number of atoms is 3.011 × 10²⁴ .

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Answer:

Pure elements:

Hydrogen(H)

Nitrogen(N)

Magnesium (Mg)

Pure Compounds:

Oxygen gas(O2)  

Water (H2O)  

Ammonia (NH3)

Explanation:

Hope it helps.Please mark me brainliest.^-^

Explanation:

Human activities such as agriculture, fuel combustion, wastewater management, and industrial processes are increasing the amount of N2O in the atmosphere. Nitrous oxide is also naturally present in the atmosphere as part of the Earth's nitrogen cycle, and has a variety of natural sources.

bullet fired from a gun

falling apple from tree

stone at a height

rusting of iron

loud speaker