Oxygen-16 and Hydrogen-1 Are they becoming positively or negatively charged ions to gain stability?

Answer: It will give up electrons, forming a positive ion.

During bonding, strontium atom will give up electrons, forming a positive ion.

STRONTIUM:

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The substance that would not be a compound is Cl3 (third option).

What is a compound?

A compound is a pure substance formed by chemical union of two or more ingredients in definite proportions by weight.

In a compound, two or more elements come together by chemical bond.

According to this question;

Glucose with the chemical formula C6H12O6, is a compound because it is made up of three elements

Sulfuric acid is also a compound because it is made up of hydrogen, sulfur and oxygen.

However, Cl3 is not a compound because it contains only chlorine atoms.

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Answer:

The answer is 263 L

Explanation:

I just did it on edu, and if you want the answer before this is 0.95 atm

Your welcome!

Answer:

i beleive iron

Explanation:

The empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen is C3H3O.

The empirical formula of a molecule tells us the simplest whole number ratio of atoms in the molecule. To find the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen, we need to convert these percentages into mole ratios.

Assuming we have 100 grams of this molecule, we can calculate the number of moles of each element:
- Carbon: 65.5 grams / 12.01 g/mol = 5.45 moles
- Hydrogen: 5.5 grams / 1.01 g/mol = 5.45 moles
- Oxygen: 29.0 grams / 16.00 g/mol = 1.81 moles

Next, we need to divide each of these mole amounts by the smallest mole amount to get the mole ratios:
- Carbon: 5.45 moles / 1.81 moles = 3.01
- Hydrogen: 5.45 moles / 1.81 moles = 3.01
- Oxygen: 1.81 moles / 1.81 moles = 1.00

So the empirical formula for this molecule is C3H3O, which can be simplified to CH3O. This means that there are three carbon atoms, three hydrogen atoms, and one oxygen atom in the simplest whole number ratio in this molecule.

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After experiment number 10, you created equilibrium solutions. In equilibrium solution A, the initial concentration of Pb is 0.00072 M, or  7.2 × 10⁻⁴ M in scientific notation.

To determine the initial concentration of Pb in equilibrium solution A, we need to consider the volumes and concentrations of the reactants involved in the mixture.

The volume of Pb(NO₃)₂ used is 5.00 mL, and its concentration is 0.012 M. Using the formula:

Moles of Pb(NO₃)₂ = volume (L) × concentration (mol/L),

we can calculate the moles of Pb(NO₃)₂ as follows:

Moles of Pb(NO₃)₂ = (5.00 mL × 0.001 L/mL) × 0.012 mol/L = 0.06 × 0.012 mol = 0.00072 mol.

Since each mole of Pb(NO₃)₂ produces one mole of Pb, the initial concentration of Pb is also 0.00072 M.

Therefore, the initial concentration of Pb in equilibrium solution A is 0.00072 M, written in scientific notation as 7.2 × 10⁻⁴ M.

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Complete question :

At the end of experiment 10, you prepared equilibrium solutions. Equilibrium solution A was prepared by mixing: 5.00 mL 0.012 M Pb(NO3)2 2.00 mL 0.030 M KI 3.00 mL 0.20 MKNO Determine the initial concentration of Pb and enter it in the box below: Written in scientific notation, this number should contain Odecimal place(s)

Answer:

Hope this helps! :)

Explanation:

The ground state electron configuration is the arrangement of electrons around the nucleus of an atom with lower energy levels. Electrons occupying the orbitals of varying energy levels naturally fall towards the lowest energy state or ground state. For example, the ground state electron configuration of oxygen is 1s2 2s2 2p4

(But to simplify it, A short hand notation to indicate the electron orbitals which are filled in a particular atom.)

The diagonal rule basically says that electrons fill orbitals in order of increasing "quantum number sum" (n + ℓ). When two orbitals share the same "quantum number sum", they will be filled in order of increasing n.

The order of intermolecular forces from weakest to strongest is dispersion forces, dipole-dipole forces, and hydrogen bonds

Intermolecular forces are electromagnetic forces that occur between one molecule and another. The intermolecular forces influence the boiling point, freezing point, density and solubility. Some of the intermolecular forces from weakest to strongest are dispersion forces, dipole-dipole forces, and hydrogen bonds.

Hydrogen bonds are the strongest intermolecular forces. This bond causes the high boiling point of water. These bonds play an important role in the structure of synthetic and natural polymers. An example of a hydrogen bond bond is H2O or water. Dipole-dipole forces have a relatively weak strength due to the permanent polarity of molecules that occurs between polar molecules at the tail and head of the molecule itself. An example of dipole-dipole forces is hydrochloric acid or HCL. Dispersion forces are the weakest intermolecular forces, this is due to the momentary induced dipole which results in an uneven electron density. An example of dispersion forces is in methane or CH4 compounds.

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When a reaction is properly refluxing, vapors from the heated mixture should be seen rising and condensing in the water-cooled condenser.

When a liquid is heated and then the resulting vapors are condensed and returned to the original liquid, the process is known as refluxing. This method ensures that the reaction's components are constantly exposed to each other, resulting in a more complete reaction.

The reaction mixture in a round-bottom flask is heated when refluxing. The vapors produced from the heated mixture should be seen rising and condensing in the water-cooled condenser. The vapors are collected and returned to the reaction vessel, which prevents the evaporation of any liquids from the reaction mixture while also enabling the reaction to continue until completion.

This procedure is frequently used in organic chemistry to generate compounds with high purity, such as esters and carboxylic acids.

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The total cooling performed by the coil is 29168.21 BTU/Hr and the sensible cooling performed by the coil is 1209.93 BTU/Hr.

Inlet Condition: TDB, in = 84 °F and TWB, in = 72 "F

Outlet Condition: TDB,

out = 55 F and TDP out = 50 'F

Flow Rate: CFM of air = 3000

Standard Density of Air = 0.075 lbm/ft³

Specific Heat of Air = 0.24 BTU/lbm-'F.

The total cooling performed by the coil can be calculated using the following formula;

Sensible Cooling = CFM x Density x Specific Heat x (TDB, in - TDB, out)

Latent Cooling = CFM x Density x (HFG x (W, in - W, out)

Total Cooling = Sensible Cooling + Latent Cooling

First, we need to calculate the density of air at the inlet condition and outlet condition using the formula:

Density = 0.075 x (460 + TDB) / (460 + TWB)  at inlet and outlet condition

Density at inlet condition = 0.075 x (460 + 84) / (460 + 72)Density at inlet condition = 0.0666 lbm/ft³

Density at outlet condition = 0.075 x (460 + 55) / (460 + 50)Density at outlet condition = 0.068 lbm/ft³

The sensible cooling performed by the coil is;

Sensible Cooling = CFM x Density x Specific Heat x (TDB, in - TDB, out)

Sensible Cooling = 3000 x 0.0666 x 0.24 x (84 - 55)

Sensible Cooling = 1209.93 BTU/Hr

The total cooling performed by the coil is;

Total Cooling = Sensible Cooling + Latent Cooling

Here, Latent Cooling = CFM x Density x (HFG x (W, in - W, out))

At the inlet condition; W, in = (0.62198 x PWS) / (PB - PWS)W,

in = (0.62198 x 0.6237) / (14.433 - 0.6237)W,

in = 0.0427

At the outlet condition; W, out = (0.62198 x PWS) / (PB - PWS)W,

out = (0.62198 x 0.315) / (14.266 - 0.315)W,

out = 0.0237

HFG at average of inlet and outlet air temperature = 1074 BTU/lbm

Latent Cooling = CFM x Density x (HFG x (W, in - W, out))

Latent Cooling = 3000 x 0.0666 x (1074 x (0.0427 - 0.0237))

Latent Cooling = 27958.28 BTU/Hr

Therefore, Total Cooling = Sensible Cooling + Latent Cooling

Total Cooling = 1209.93 + 27958.28

Total Cooling = 29168.21 BTU/Hr

Therefore, the total cooling performed by the coil is 29168.21 BTU/Hr and the sensible cooling performed by the coil is 1209.93 BTU/Hr.

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Answer:

B. O2 is reduced when it accepts electrons and forms water.

Explanation:

During cellular respiration water is formed when oxygen receives electrons and picks up protons at the conclusion of the electron transport chain. The electron transport chain will stop functioning if there isn't enough oxygen to receive electrons (for example, because a person isn't breathing in enough oxygen), and ATP will no longer be created by chemiosmosis. Cells can't carry out the reactions they need to function if they don't even have enough ATP, and they may perish after a long period of time.

Answer:

118.71 u

Explanation:

Tin. Tin is a chemical element with the symbol Sn (for Latin: stannum) and atomic number 50. It is a main-group metal in group 14 of the periodic table.

Source: https://en.m.wikipedia.org/wiki/Period_5_element#:~:text=Tin,-Main%20article%3A%20Tin&text=Tin%20is%20a%20chemical%20element,14%20of%20the%20periodic%20table.

The D45G variant of GalK has a lower affinity for all three substrates (D-galactose, D-xylose, and L-arabinose) than the wild-type GalK.

The D45G mutation in GalK changes the amino acid at position 45 from aspartic acid (D) to glycine (G). Aspartic acid is a negatively charged amino acid, while glycine is a neutral amino acid. This change in charge affects the polarity of the active site, making it less polar. The substrates for GalK are all polar molecules, so the less polar active site in the D45G variant has a lower affinity for these substrates.

In addition to the change in polarity, the D45G mutation also changes the shape of the active site. The side chain of aspartic acid is bulky, and it helps to fill in some of the gaps in the active site. The side chain of glycine is smaller, so it leaves more gaps in the active site. These gaps make it more difficult for the substrates to bind to the active site.

The combination of these two factors, the change in polarity and the change in shape, results in a lower affinity for all three substrates in the D45G variant of GalK.

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Answer:

D. The reaction in test tube 1 is exothermic, and the reaction in test tube 2 is not.

Explanation:

just took it

The option that best explains the result is option D. That is, the reaction in test tube 1 is exothermic, and the reaction in test tube 2 is not.

In a chemical reaction, heat is either absorbed or released.

In a reaction where there is absorption of heat from the surrounding is called an endothermic reaction.

While in a reaction where heat is released into the surrounding is called exothermic reaction.

From the experiment, there is increase in temperature, from 20 to 25°C, which shows the release of temperature to the surrounding.

Therefore, the reaction in test tube 1 is exothermic, and the reaction in test tube 2 is not.

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Two single bonds and two lone pairs of electrons: Oxygen molecule (O2)

Four single bonds and no lone pairs of electrons: Methane molecule (CH4)

Three single bonds and one lone pair of electrons: Ammonia molecule (NH3)

Six single bonds and no lone pairs of electrons: Carbon dioxide molecule (CO2)

Two double bonds and no lone pairs of electrons: Oxygen molecule (O2)

Three double bonds and no lone pairs of electrons: Nitrogen molecule (N2)

Five single bonds and no lone pairs of electrons: Phosphorus pentachloride molecule (PCl5)

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Answer:

If a membrane is permeable to water, though not to a solute, water will equalize its own concentration by diffusing to the side of lower water concentration

Explanation:

A negative (triangle) Hf for a molecule means that energy was released when the molecule was formed from its elements.

The symbol (triangle) Hf represents the enthalpy change during the formation of a molecule from its constituent elements. A negative (triangle) Hf indicates that the formation of the molecule is exothermic, which means that energy is released during the process. This energy release can be in the form of heat or light.


The enthalpy change during the formation of a molecule from its elements is an important thermodynamic parameter that provides information about the stability and reactivity of the molecule. A negative (triangle) Hf indicates that the formation of the molecule is energetically favorable, and the molecule is more stable than its constituent elements.

For example, the formation of water from hydrogen and oxygen molecules has a negative (triangle) Hf of -286 kJ/mol. This means that energy is released during the formation of water, and the reaction is exothermic. The negative (triangle) Hf value indicates that the products (water molecules) are more stable than the reactants (hydrogen and oxygen molecules).

On the other hand, a positive (triangle) Hf value indicates that the formation of the molecule is endothermic, which means that energy is absorbed during the process. This energy absorption can be in the form of heat or light. Positive (triangle) Hf values indicate that the products are less stable than the reactants and require energy input to form.

In conclusion, a negative (triangle) Hf for a molecule means that energy was released when the molecule was formed from its elements, and the formation of the molecule is exothermic.

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4.9 moles of salt are required to be added to 1 kg water to change the boiling temperature

by 5°C.

Based on the given equation, the molality of the solution is calculated as follows:

Change in temperature = 5 °C

Kb = 0.51

i = 2

Molality = 5/0.51 × 2 = 4.9 molal

Also, Molality = moles/kg of water

Moles of salt = molality × kg of water

Moles of salt = 4.9 × 1 = 4.9 moles.

Therefore, 4.9 moles of salt are required to be added to 1 kg water to change the boiling temperature

by 5°C.

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Answer: if we lost our core it would be an entire fallout like fallout 76 we would have no way to protect ourselves from the radiation of space except for a select few that actually own astronaut suits tho we would not turn into monsters, sadly :( I wanna be a ghoul

483.07 grams

The reaction between Iron (III) oxide and carbon to produce solid iron and carbon monoxide is given as

Determine the moles of Iron(III) oxide

According to stoichiometry, 1 mole of Iron(III)oxide produced 2 moles of Iron. The moles of Iron required is expressed as:

Determine the mass of Iron produced

Hence the mass of iron that can be produced is 483.07 grams

The correct match of the correct location on the image is:

Rain or any other form of precipitation that is unusually acidic, that is, with high quantities of hydrogen ions, is referred to as acid rain.

The acid from acid rain produces corroding effects on snails. Due to global warming, the ice caps melt, thus increasing the sea levels.

Therefore, the correct option is

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The question is incomplete. Your most probably complete question is given below:

answer choices are

acid rain,

and global warming

Answer:

Theoretical yield = 40.8g

Explanation:

4Al + 3O2 ----] 2Al2O3

10.8g×102.0g/ 27.0g

theoretical yield = 40.8 g

Answer:

20.410 grams of Al2O3 are produced

Explanation:

First, we need to calculate the number of moles of aluminum that are actually reacting..

     We will convert from grams to moles using the atomic weight which (for aluminum) is 26.982 g/mol (which can also be rewritten as 1 mol/26.982)

10.8 g Al * 1 mol Al/26.982 g Al = 0.4002668446 moles Al

**Grams cancel out, so we are left with moles

(I would type this differently so that it would make more sense visually, however brainly is giving me errors, so try writing it out yourself if it doesn't initially make sense..put the equation in fraction form)

     Now that we have the moles of Al, we will convert from moles of Al reacting to moles of aluminum oxide produced..

To do this we will use the balanced chemical equation..

4Al + 3O2 -> 2Al2O3

Using the balanced chemical equation, we can see that for every 4 moles of aluminum that react, 2 moles of aluminum oxide are produced..

0.4002668446 moles Al * 2 mol Al2O3 / 4 mol Al

= 0.2001334223 moles Al2O3..

Now we need to convert from moles of Al2O3 to grams..

We can do this using the atomic weight of Al2O3..

The atomic weight of Al2O3 is 101.961 g/mol or 1 mol/101.961 grams

Now we will convert to grams of Al2O3...

0.2001334223 moles Al2O3 * 101.961 grams Al2O3/1 mol Al2O3

= 20.40580387..

20.410 grams of Al2O3 are produced

To determine the pressure of the ammonia gas at a new volume and temperature, we can use the combined gas law, which states that the ratio of the initial pressure, volume, and temperature is equal to the ratio of the final pressure, volume, and temperature.

Using the combined gas law equation: (P1 * V1) / T1 = (P2 * V2) / T2

Given:

P1 = 585 torr (initial pressure)

V1 = 20.0 ml (initial volume)

T1 = 20.0 °C + 273.15 = 293.15 K (initial temperature)

V2 = 50.0 ml (final volume)

T2 = 50.0 °C + 273.15 = 323.15 K (final temperature)

We need to solve for P2 (final pressure).

Rearranging the equation, we have:

P2 = (P1 * V1 * T2) / (V2 * T1)

Substituting the given values into the equation:

P2 = (585 torr * 20.0 ml * 323.15 K) / (50.0 ml * 293.15 K)

Calculating this expression gives us the final pressure (P2) of the ammonia gas at the new volume and temperature.

In summary, using the combined gas law equation, we can determine the pressure of the ammonia gas at a new volume and temperature. By substituting the given values into the equation and performing the calculation, we can find the final pressure of the gas.

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If a reaction occurs in a flask and the temperature decreases, this indicates that the reaction is exothermic. This means that the products of the reaction have less energy than the reactants, and the excess energy is released as heat.

The symbol for the change in enthalpy of a reaction is δH, where the negative sign indicates an exothermic reaction. In this case, the δH would be negative, indicating that heat is released by the system. It is important to note that the magnitude of the temperature change does not necessarily indicate the magnitude of the δH, as the heat capacity of the flask and surrounding environment can also play a role in the temperature change.

When a reaction occurs in a flask and you observe that the flask gets colder, it indicates an endothermic reaction. In an endothermic reaction, the system absorbs energy from its surroundings, causing a decrease in temperature. The sign of ΔH (change in enthalpy) for endothermic reactions is positive, as the system gains heat from its environment. Therefore, in this case, the sign of ΔH is positive.

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Answer:

19.8% of Nitrogen

Explanation:

In the Al(NO₃)₃ there are:

1 atom of Al

3 atoms of N

And 9 atoms of O

The molar mass of Al(NO₃)₃ is:

1 Al * (26.98g/mol) = 26.98g/mol

3 N * (14g/mol) = 42g/mol

9 O * (16g/mol) = 144g/mol

26.98 + 42 + 144 = 212.98g/mol

We can do a conversion using these molar masses to find the mass of nitrogen is the sample, that is:

2.57g * (42g/mol / 212.98g/mol) =

0.51g N

Percent composition of nitrogen is:

0.51g N / 2.57g * 100

= 19.8% of Nitrogen

The density of the liquid is 1.05 g/ml. To find the volume of 1.05 g of the liquid, we can use the formula:

Density = Mass / Volume

Solving for Volume, we get:

Volume = Mass / Density

Substituting the given values, we get:

Volume = 1.05 g / 1.05 g/ml

Volume = 1 ml

To convert ml to liters, we divide by 1000:

Volume = 1 ml / 1000

Volume = 0.001 L

Therefore, the volume of 1.05 g of this liquid is 0.001 liters.

To find the volume of 1.05 g of a liquid with a density of 1.05 g/mL, you can use the formula:

Volume = Mass / Density

Given:
Mass = 1.05 g
Density = 1.05 g/mL

Now, plug the values into the formula:

Volume = 1.05 g / 1.05 g/mL = 1 mL

Since 1 L equals 1000 mL, you'll need to convert the volume from mL to L:

Volume = 1 mL * (1 L / 1000 mL) = 0.001 L

So, the volume of 1.05 g of this liquid is 0.001 liters.

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Answer: Mixing vinegar and baking soda initiates a chemical reaction that produces carbon dioxide and water.

Explanation:

Answer:

Alex forgot to get a flu shot and missed two weeks of school

answer:

a change from one form of energy to another

explanation: