A solution with a volume of 4.0 L that contains 2.0 mol of KNOg has a molarity of

We will be left with 16g after 6years

The half-life of  radioactive isotopes refers to the amount of time it will take for half of the amount of the original isotope to decay.

it is calculated as

N(t)=N₀([tex]\frac{1}{2}[/tex])^(t/t₁/₂)

where,

N(t) = quantity of the substance remaining

N₀ = initial quantity of the substance

 t= time elapsed

t₁/₂ = half life of the substance

Given that:

The initial quantity is 1024g,

The half-life is 1year,

6 years is the time elapsed.

We have that

N(t)=N₀([tex]\frac{1}{2}[/tex])^(t/t₁/₂)

N(t)=1024([tex]\frac{1}{2}[/tex])^(6/1)

N(t)=1024([tex]\frac{1}{2}[/tex])⁶

N(t)=1024 x 0.015625

N(t)=16g

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Answer:

The number of electron shells is therefore the same across a period but increases when moving down a column.

Explanation:

Answer:

the answer should be d I'm pretty sure.

Answer: D.Plants with large leaves have become common in rain forest

Explanation: I got this right on the test trust me

Answer:

D. Plants with large leaves have become common in rain forests

Explanation:

I got it correct. Be careful that sometimes the questions are in another order, so be guided by the sentence.

Answer:

1. Never leave the gas cartridge in the stove when you’re not using it.

2. Always wait until the stove cools down before you remove the gas cartridge.

3. Always try to store gas cartridges and camping stoves in a dry place

4. Clean your stove each time you have used it because it needs to be clean in order to perform at its best.

The number of mole in the container at 1.8 atm with a temperature of 270 K is 0.162 mole.

From the question given above, the following data were obtained:

Gas constant (R) = 0.0821 atm.L/Kmol

Volume (V) = 2 L

Pressure (P) = 1.8 atm

Temperature (T) = 270 K

Using the ideal gas equation, we can obtain the number of mole in the container as illustrated below:

1.8 × 2 = n × 0.0821 × 270

3.6 = n × 22.167

Divide both side by 22.167

n = 3.6 / 22.167

Therefore, the number of mole in the container is 0.162 mole

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Answer:

sediments are compacted and compressed under pressure

Answer:

A → 16 protons

B → 16 neutrons

C → Sulfur

Explanation:

Remember, in a neutral atom the amount of protons is the same as the number of electrons. In the picture provided, its shown that there are 16 electrons which means there are 16 protons. Finding the amount of neutrons will be more tricky. The valence electron count will allow us to find this. The valence electrons will allows us to determine where it is on the periodic table (So does atomic number). The valence electron count is 6. So, using the current information (6 valence electrons and atomic number of 16) we can look at the periodic table and pinpoint which element it is. As you look, you'll find that the element sulfur matches the information. Since the element is sulfur, and it has an atomic mass of 32, we can subtract the atomic number from the atomic mass to find the amount of neutrons.

32 - 16 = 16

Thus, the atom in the picture is sulfur with an atomic number of 16, atomic mass of 32, and an electron count of 6.

It might indicate NO fermentation and oxidation of glucose occurred. An oxidative organism breaks down glucose in presence of Oxygen, while a nonoxidative organism can break down glucose in absence of oxygen.

An Oxidation-Fermentation (OF)-glucose test is a microbiological test to determine how an organism is able to break down glucose.

In the first tube, a layer of mineral oil is added in order to reproduce anaerobic conditions, whereas this layer is not added to the second tube in order to reproduce aerobic conditions.

When the non-oil tube turns yellow, while the oil tube remains green, it means that the microorganism is oxidative (i.e., the microorganism only can metabolize glucose in presence of oxygen).

If both tubes remain green, it means that the test is negative and no fermentation/oxidation of glucose occurred.

If both tubes turn yellow, then the microorganism is oxidative and fermentative.

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Answer:

Kinetic energy is the energy by ethicalness of article's movement while Thermal energy is the inner energy of an item because of the motor energy of its particles.

Explanation:

Answer:

Thermal energy:

Thermal energy is a type of energy that is formed by the vibration of atoms and molecules inside matter. The faster they vibrate, the more energy they contain. They also gain more heat.

Kinetic energy:

Kinetic energy is the mass/energy that is in moving objects. When an object speeds up, it gains more kinetic energy. All moving objects contain kinetic energy. The moving object gains energy due to its motion.

Note:

Sorry if this is a bad explanation but hopefully this helped!

Answer:

its A

Explanation:

cause Earth's relatively thin atmosphere primarily consists of a mixture of nitrogen (75%) and oxygen (21%) gases.

Answer:

The answer to your question is A

Explanation:

Because Earth's relatively thin atmosphere primarily consists of a mixture of nitrogen (75%) and oxygen (21%) gases.

Answer: I'm pretty sure the answer is 3:2

Explanation:

Gold (Au) in its bulk form, like the metal in a wedding ring, is not considered a magnetic material. ... This means that metallic gold has no unpaired electrons, and it does not display classical magnetism. Gold was one of the first metal known to man. Gold is most malleable and ductile of all metals.

Answer:

In general an acid reacts with a carbonate or hydrogen-carbonate to produce a salt, carbon dioxide gas and water.

Answer:

[tex]\boxed {\boxed {\sf 63.57 \ mol }}[/tex]

Explanation:

We are asked to find how many moles of gas are in a sample.

At standard temperature and pressure (STP), any gas has a molar mass of 22.4 liters per mole. This means 1 mole of every gas at STP has a volume of 22.4 liters.

We will convert using dimensional analysis. Set up a conversion factor using the molar mass.

[tex]\frac {22.4 \ L }{1 \ mol }[/tex]

We are converting 1424 liters of gas to moles, so we multiply the conversion factor by this value.

[tex]1424 \ L *\frac {22.4 \ L }{1 \ mol }[/tex]

Flip the ratio so the units of liters cancel.

[tex]1424 \ L *\frac {1 \ mol }{22.4 \ L }[/tex]

[tex]1424 *\frac {1 \ mol }{22.4 }[/tex]

[tex]\frac {1 424}{22.4 } \ mol[/tex]

[tex]63.5714286 \ mol[/tex]

The original value of volume (1424 L) has 4 significant figures, so our answer must have the same. For the number we found, that is the hundredth place. The 1 in the thousandth place tells us to leave the 7 in the hundredth place.

[tex]63.57 \ mol[/tex]

There are approximately 63.57 moles of gas in a sample of 1424 liters.

Answer: 32g of sulfur, S, is 1 molar mass

1 molar mass contains X particles (in this case, atoms)

32g of oxygen, O2, is 1 molar mass

1 molar mass contains X particles (in this case, molecules)

There are 2 oxygen atoms in each molecule of O2 gas

Therefore, there are 2X atoms of oxygen in 32g of oxygen gas.

Explanation:  bcs yes

The value of x in the compound SOₓ is 3 . The compound is SO₃

The relative atomic mass of sulphur is given as 32

The relative atomic mass of oxygen is given as 16

The compound shown contains 80 g of sulphur and 120 g of oxygen.

The value of x can be calculated as follows:

molecular mass of S0ₓ = 32 + 16x

if 32 g of sulphur is in 32 + 16x of the of S0ₓ

80 g of sulphur is in 200 g of the compound

cross multiply

200(32) = 80(32 + 16x)

6400 = 2560 + 1280x

6400 - 2560 = 1280x

3840 = 1280x

x = 3840 / 1280

x = 3

Therefore, the compound is SO₃

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Answer:

The answer is C

Explanation:

Protons and neutrons are found in the nucleus of an argon atom.

Answer:

The answer is Lyase

Explanation:

Any enzyme that catalyzes the addition or removal of the elements water (hydrogen, oxygen), ammonia (nitrogen, hydrogen), or carbon dioxide (carbon, oxygen) at double bonds, as defined in physiology. Decarboxylases, for example, remove carbon dioxide from amino acids, while dehydrases eliminate water.

Answer:

Explanation:

As we know,

Answer:

The first high part is Q4, then the low part is Q7, the following high part is Q6, and the energy moving from the next two high points is Q5.

Explanation:

The first high part is Q4, then the low part is Q7, the following high part is Q6, and the energy moving from the next two high points is Q5 because of the diagram.

Answer:

The fairly positive hydrogen on one HF molecule will be attracted to one of these lone pairs on a nearby HF molecule. This is a hydrogen bond. Hydrogen bonds are attractions between a δ+ hydrogen on one molecule and a lone pair on a very electronegative atom (N, O or F) on another molecule.

Explanation:

Answer:

Cellular respiration and photosynthesis are direct opposite reactions. Energy from the sun enters a plant and is converted into glucose during photosynthesis. Some of the energy is used to make ATP in the mitochondria during cellular respiration, and some is lost to the environment as heat.

Answer:

A. The elements that have been discovered so far can be found here.

B. It is arranged by the atomic number (number of protons).

Explanation:

About the Answers:

All the elements that have been discovered are on the periodic table. Scientist know that there are still unknown elements and actually predict what they'll be like and what their properties are. The periodic table is arranged by the increasing number of atomic numbers. The atomic number is main identification of elements and is the amount of protons each element has.  

About the Wrong Answers:

All the compounds that can be created are not found on the periodic table. In fact, there more than nine million organic compounds. The periodic table is not arranged by all of the subatomic particles. While the atomic mass and electron configuration is included, it is not arranged by it.

It is not possible  that  a molecule that has absorbed infrared radiation subsequently emit a photon with a wavelength in the UV region as a result.

Both infrared rays and ultraviolet rays belong to the electromagnetic spectrum. However, the infrared rays are lower in energy than the ultraviolet rays. Hence, infrared rays have a longer wavelength than ultraviolet rays.

This implies that it is not possible that  a molecule that has absorbed infrared radiation subsequently emit a photon with a wavelength in the UV region as a result.

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Answer:

question pls.............

Answer:

it is true

Explanation:

that's the right answer

Answer: True. Hydrogen bonding is a dipole-dipole interaction and it is between water and another molecule.

Answer:

2.40 × 10² nm.

Explanation:

We are given that the the first ionization of a sodium atom is 5.00 × 10² kJ/mol and we want to determine the wavelength of light (in nm) that is sufficient to ionize a sodium atom.

We will first find the ionization energy required for one sodium atom using molar conversions:

[tex]\displaystyle 1 \text{ atom Na} \cdot \frac{5.00 \times 10^2\text{ kJ}}{\text{mol Na}} \cdot \frac{1\text{ mol Na}}{6.02\times 10^{23} \text{ atom Na}} = 8.31 \times 10^{-22} \text{ kJ}[/tex]

From the formula:

[tex]\displaystyle E = hv[/tex]

Where h is Planck's constant, substitute and solve for frequency v:

[tex]\displaystyle \begin{aligned} \left(8.31 \times 10^{-22} \text{ kJ}\right) &= (6.626\times 10^{-34} \text{J$\cdot$s})\left(\frac{1 \text{ kJ}}{1000 \text{ J}}\right) v \\ \\ v & = 1.25\times 10^{15} \text{ s}^{-1}\end{aligned}[/tex]

From the relationship between frequency and wavelength, solve for wavelength:

[tex]\displaystyle \begin{aligned} c & = \lambda\nu \\ \\ \lambda & = \frac{c}{v} \\ \\ & = \frac{(3.00 \times 10^8 \text{ ms}^{-1})}{(1.25 \times 10^{15}\text{ s}^{-1})}\cdot \left( \frac{1\times 10^9\text{ nm}}{1 \text{ m}}\right)\\ \\ &=2.40\times 10^2 \text{ nm} \end{aligned}[/tex]

In conclusion, the wavelength of light necessary to ionize a sodium ion is about 2.40 × 10² nm.

Answer:

ZnS

Explanation:

Answer:

the chemical formula for zinc iii is ZnS

Answer:

I think the answer is the same number of protons.

Explanation:

I think the same element contain same number of protons.