Anyone know how to answer this?

Answer:

the value of water is

6000

Answer:

600 or 6000 I'm not sure

Answer: the answer is a

Explanation:

you should always keep lab coat on when in lab

Answer:

its  A. chemistry labs have a lot of things that can hurt you, even with just a few drops . its one of the most dangerous experiment types you do in science. even if your not doing an experiment  but your in the room you should have on protection in case of a spill or something.  it is always impotent  to have safety  gear on. even more so in chemistry

Answer:

Fusion doesn't produce runway chain reactions the way fission can, so there's no need to worry about meltdowns.

Answer:

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

Answer:

The correct answer is - option A. It is important to always ask questions and want to find answers not just in science but in all activities.

Explanation:

Curiosity is the desire to learn about things and natural phenomenon that what is the reason behind the particular reaction or particular phenomenon and any type of knowledge to understand things better.

It is an ability that is not confined to the scientific community only but found in most of the humans and in all the activities. It helps in understanding the world and things better.

Thus, the correct answer is - option A.

Answer:

1.99 g/mL

Explanation:

Use the formula d = m/v, where m is the mass and v is the volume.

Plug in the values:

d = 49.1/24.7

d = 1.99 g/mL

Answer:

About 1.99 g/mL

Explanation:

The density of a substance can be found using the following formula:

d= m/v

where m is the mass and v is the volume.

The mass of this substance is 49.1 grams and the volume is 24.7 milliliters.

m= 49.1 g

v= 24.7 mL

Substitute these values into the formula.

d= 49.1 g / 24.7 mL

Divide 49.1 g by 24.7 mL

d= 1.98785425 g/mL

We are asked to round to two decimal places, or the hundredth place. The 8 in the thousandth place tells us to round the 8 to a 9 in the hundredth place.

d ≈ 1.99 g/mL

The density of the this substance is approximately 1.99 grams per milliliter.

Answer:

Trichlorophosphane would be your answer

Explanation:

Answer:

Trichlorophosphane

Explanation:

Approximately 7.98 grams of silver chromate will precipitate when 150 mL of 0.500 M silver nitrate is added to 100 mL of 0.400 M potassium chromate.

To determine the amount of silver chromate that will precipitate when 150 mL of 0.500 M silver nitrate is added to 100 mL of 0.400 M potassium chromate, we need to identify the limiting reagent and calculate the corresponding amount of silver chromate formed.

First, we can calculate the number of moles of silver nitrate and potassium chromate using their respective concentrations and volumes:

Moles of silver nitrate = concentration × volume = 0.500 M × 0.150 L = 0.075 mol

Moles of potassium chromate = concentration × volume = 0.400 M × 0.100 L = 0.040 mol

From the balanced chemical equation:

2 AgNO3 + K2CrO4 → Ag2CrO4 + 2 KNO3

We can see that the stoichiometric ratio between silver nitrate and silver chromate is 2:1. Therefore, the moles of silver chromate formed will be half the moles of silver nitrate used:

Moles of silver chromate formed = 0.075 mol / 2 = 0.0375 mol

Finally, we can calculate the mass of silver chromate using its molar mass:

Mass of silver chromate = moles × molar mass = 0.0375 mol × (2 × 107.87 g/mol) = 7.98 g

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Answer:

docx it is a science document

Answer:

Explanation:

I cant see the question, could you type it out?

Answer:

c

Explanation:

try it I'm 60%sur its this

Since 3 moles of hydrogen are needed for every 1 mole of nitrogen, a litre of nitrogen takes 3 litres of hydrogen. So, to generate ammonia, 7 L of nitrogen will need 21 L of hydrogen.

To calculate the ammonia gas volume: -First, determine how many moles of N2 and H2 there are. -Next, determine how many moles were produced by the reaction. Use the following equation: volume of ammonia gas = number of moles x volume at STP.

In the Haber-Bosch process, hydrogen and nitrogen are combined and treated at high pressure and temperature using a catalyst to make ammonia.

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Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.

The correct answer is D. 100 mL × 1g divided by 1mL × 1mol divided by 18.02g × 4.186 kJ/mol = 23.2 kJ

To calculate the energy required to boil 100 mL of water, we need to use the specific heat capacity of water, which is approximately 4.186 J/g·°C. The molar mass of water is 18.02 g/mol.

First, we convert the volume of water from milliliters to grams:

100 mL × 1 g/1 mL = 100 g

Then, we calculate the number of moles of water:

100 g × 1 mol/18.02 g = 5.548 mol

Finally, we multiply the number of moles by the molar heat of vaporization of water, which is approximately 40.65 kJ/mol:

5.548 mol × 4.186 kJ/mol = 23.2 kJ

Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.

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\( \sf \implies 12 + ( 16\times 2) \\ \)

\( \sf \implies 12 + 32 \\ \)

\( \sf \implies 44 \\ \)

That means one mole of \( \sf CO_{2} \)has a mass of 44 g.

1 mole of carbon dioxide is equal to \( \sf 6.02 \times 10^{23}\\ \) molecules of carbon dioxide.Then, 7 moles is equal to -

\( \sf \implies 7\times 6.02\times 10^{23} molecules \\ \)

\( \sf \implies 4.214 \times 10^{24} \\ \)

Answer:

short answers:

A learned behavior is a behavior that develops during an animal’s lifetime.

Examples of learned behaviors include tying one’s shoes or solving a math problem.

An inherited behavior is a behavior that an animal is born with.

An example of an inherited behavior is a bird building a nest.

Explanation:

Learned behaviors are those which are gradually developing in us through learning at different ages and it takes time. Inherited behaviour is innate to us which are incorporated with us by birth.

An organism develops a learned behavior as a result of experience. In contrast to learned actions, inherent behaviors are genetically preprogrammed and can be carried out without any prior knowledge or instruction.  

Certain behaviors have features that are both acquired and innate. Zebra finches, for instance, have a genetic predisposition to learn a song, but the song they sing is influenced by what they hear from their dads.

Inherited behaviors are inherited from parents to their offsprings. Such as  similar nature in sound, angriness, some diseases etc. They are not gathered from any experience and are accompanied by birth.

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Answer:

The noble gases(neon, helium, argon)

Explanation:

In the ground state, noble gas atom has a completely filled valence electron shell. Space makes up the majority of an atom.

The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. Electric forces, which link electrons towards the nucleus of atoms, cause them to be drawn to any positive charge.

Space makes up the majority of an atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense. In the ground state, noble gas atom has a completely filled valence electron shell.

Therefore, in the ground state, noble gas atom has a completely filled valence electron shell.

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To determine how many times bigger the surface area to copper ratio of a nanoparticle is compared to bulk copper, we need to consider the difference in their geometries.

In general, nanoparticles have a much higher surface area compared to their volume due to their small size and increased surface-to-volume ratio. Bulk copper, on the other hand, has a relatively lower surface area compared to its volume because of its larger size.

Let's denote the surface area to volume ratio of the nanoparticle as SA/V_np and the surface area to volume ratio of bulk copper as SA/V_bulk.

The formula for surface area to volume ratio (SA/V) is:

SA/V = Surface Area / Volume

Since we are comparing the ratios, we can express the ratio of the nanoparticle to bulk copper as:

(SA/V_np) / (SA/V_bulk)

Now, let's consider the geometries of nanoparticles and bulk copper:

Nanoparticle:

A nanoparticle is characterized by its small size, often ranging from a few nanometers to hundreds of nanometers. Let's assume a simple shape for the nanoparticle, such as a sphere, for calculation purposes.

Surface Area of a Sphere = 4πr^2

Volume of a Sphere = (4/3)πr^3

Bulk Copper:

Bulk copper refers to a larger piece of copper with dimensions much larger than the nanoparticle. In this case, let's consider a cube for simplicity.

Surface Area of a Cube = 6s^2

Volume of a Cube = s^3

To compare the surface area to volume ratios, we need to find the expressions for SA/V_np and SA/V_bulk:

SA/V_np = (4πr^2) / [(4/3)πr^3] = 3/r

SA/V_bulk = (6s^2) / s^3 = 6/s

Now, let's determine the ratio:

(SA/V_np) / (SA/V_bulk) = (3/r) / (6/s)

                       = (3s) / (6r)

                       = s / (2r)

The ratio s / (2r) represents how many times bigger the surface area to volume ratio of the nanoparticle is compared to bulk copper.

Since we don't have specific values for the size of the nanoparticle or the bulk copper, we cannot provide an exact numerical value. However, based on the ratio s / (2r), we can infer that the surface area to volume ratio of the nanoparticle will generally be significantly larger than that of bulk copper due to the smaller size and increased surface area.

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Answer:0.144gWorking out:mol= conc x volume (in dm^3)mass = mol x RFFSo,mol = 0.18 x (20/1000) = 0.0036molMass= 0.036 x 40 = 0.144g.

Explanation:

Answer:

nucleic acids

Explanation:

Nucleic acids are bio-molecules that carry the sequence of molecular blueprints that are necessary for the replication of cells. As a result of this, they are largely responsible for inheritance.

These nucleic acids occur as deoxyribonucleic acid(DNA) or ribonucleuic acid(RNA).

DNA is responsible for the passing on of hereditary information of an organism​.

Sₙ2 mechanism for nucleophilic substitution reactions involves one step and occurs with inversion of configuration. - True

The rate determining step in Nucleophilic bimolecular Substitution reaction involves the presence of both substrate and the attacking nucleophile as in this mechanism the the process of bonding of substrate with the nucleophile takes place simultaneously with the process in which the leaving group is leaving the substrate. \

Rate α [Substrate][attacking nucleophile]

So, the reaction takes place in one step.

Also, the attacking nucleophile attacks on the opposite side of the leaving group of the substrate, so this reaction occurs with inversion in configuration.

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Nuclear magnetic resonance spectroscopy (NMR) is used to study the electronic environment of atoms and the bonding nature of a compound.

The number of different signals observed in the 1H NMR spectra of the given compounds are as follows: Compound A: 10 signals, Compound B: 6 signals ,Compound C: 4 signals Compound D: 6 signals ,Compound E: 9 signals, Compound F: 3 signals

In proton nuclear magnetic resonance spectroscopy (1H NMR), the magnetic field strength and electronic environment of the protons influence the chemical shifts. The shielding effect or deshielding effect of the nearby atoms, bond length, and bond angle, among other factors, all influence the chemical shifts. There are five different types of proton environments, which correspond to five different chemical shifts, in this case: Type 1: Hydrogen atoms that are covalently bonded to sp3 hybridized carbons. Type 2: Hydrogen atoms that are covalently bonded to sp2 hybridized carbons. Type 3: Hydrogen atoms that are covalently bonded to sp hybridized carbons. Type 4: Hydrogen atoms that are covalently bonded to aromatic carbons. Type 5: Hydrogen atoms that are directly bonded to electronegative elements such as nitrogen, oxygen, or halogens.

Here, to determine the number of signals expected in the 1H NMR of the compounds. Compound A: 10 different proton environments => 10 signals. Compound B: 6 different proton environments => 6 signals. Compound C: 4 different proton environments => 4 signals. Compound D: 6 different proton environments => 6 signals. Compound E: 9 different proton environments => 9 signals. Compound F: 3 different proton environments => 3 signals.

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Make the moon smaller than the Earth.

Boyle's law

P₁V₁=P₂V₂

4 x 450 = P₂ x 700

P₂ = 2.571

The structure at Teotihuacan which was built over a multi-chambered cave with a spring, which may have been the original focus of worship at the site is the Temple of the Feathered Serpent (also known as the Temple of the Feathered Serpent).

The Temple of the Feathered Serpent, also known as the Temple of the Teotihuacan, is located at the southern end of the Avenue of the Dead at Teotihuacan. The temple was dedicated to the Mesoamerican god Quetzalcoatl. The temple's front façade is decorated with stone reliefs of feathered serpents that were once painted in bright colors.

The temple was built over a cave that housed natural springs. The cave was once considered a sacred place and was probably a focus of religious ceremonies before the temple was built.

Archaeologists have discovered many offerings, including pottery and obsidian blades, that were made in the cave before it was sealed and incorporated into the temple's construction.

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Answer:

5

Explanation: