Sponed If 10cm³of hydrogen gas were sparked with 20cm³ of oxygen. calculate the volume(s) of residual gas (es) after cooling​

Answer:

Neodymium makes flints inside of lighters. It also takes away the green color off of glass. Rhenium is added with tungsten and molybdenum which makes filaments for lamps. Sulfur makes sulfuric acid which makes batteries and cleaners and can process ores.

Explanation:

An interesting fact for each element:

Neodymium is known for the atomic symbol Nd and the atomic number 60.

Rhenium is known for the atomic symbol Re and the atomic number 75.

Sulfur is known for the atomic symbol S and the atomic number 16.

I hope the Answer answers your question. I gave you some facts to remember those elements in the periodic table!

Neodymium(III) bromide, NdF3, neodymium(III) chloride, NdCl3, neodymium(III) bromide, NdBr3, and neodymium(III) iodide, NdI3, are the results of its reactions with fluorine, chlorine, bromine, and iodine.

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Answer:

Well maybe the pedals they don't help much

Explanation:

Answer:

brainliest please

Explanation:

the pollen probably because other plants have it

Answer:

and the question is?

Explanation:

The correct formula for the compound formed between barium and sulfur is BaS. Ba

The correct formula for the compound formed between barium and sulfur is BaS. Ba represents the chemical symbol for barium, and S represents the chemical symbol for sulfur. When barium and sulfur combine, they form an ionic compound with a 1:1 ratio of barium ions (Ba2+) and sulfide ions (S2-). The compound BaS indicates that one barium atom combines with one sulfur atom to form an ionic compound. In BaS, barium has a 2+ charge (Ba2+), and sulfur has a 2- charge (S2-).

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At various temperatures, catalase functions in different ways. The catalase enzyme becomes more active as the temperature rises from 0°C to about 30°C. Up to 100°C, catalase activity declines as the temperature rises.

How much cold can cells endure?

Cells can be stored for centuries at temperatures as low as -196 degrees C. The difficult part is figuring out how they can endure being cooled to such degrees and then being brought back to their normal physiological state. Whether they freeze intracellularly is a key consideration.

In general, a reaction is sped up by increasing temperature and slowed down by decreasing temperature. But extremely high temperatures can denature an enzyme, causing it to lose its form and cease functioning. Every enzyme has a preferred pH range. Temperatures near body temperature (37.5°C) are ideal for catalase enzyme activity and it performs poorly at temperatures of 30°C or lower or 45°C or higher.

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The neutrons are the neutral sub-atomic particles present in the nucleus. The variation in the number of neutrons produces isotopes that have different atomic mass. Thus, options 1. d and 2. a are correct.

An isotope is said to be an atom of an element that have a different atomic mass but the same atomic number due to the variation in the neutrons in the nucleus. The neutrons have a neutral charge that makes the atom stable.

When a neutron is added or lost it makes the nucleus of the atom unstable leading to radioactive decay. The isotopes have the same constant number of protons in their nucleus.

The atomic number of the atom remains the same due to the stable proton number but varies the atomic mass due to the change in the number of neutrons.

Therefore, options d and a. neutrons and atomic mass are the correct blanks.

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One or more new substances formed.

Answer:

d

Explanation:

100 quiz

Based on the provided data, the concentration of ammonia in the cloudy ammonia solution is 0.200 M.

The balanced chemical equation for the reaction between ammonia and hydrochloric acid is:

NH3(aq) + HCl(aq) → NH4Cl(aq)

From the equation, we see that one mole of ammonia reacts with one mole of hydrochloric acid to produce one mole of ammonium chloride.

To determine the concentration of ammonia in the cloudy ammonia solution, we need to find out how many moles of hydrochloric acid were used to react with the ammonia.

The number of moles of HCl used is:

moles of HCl = concentration of HCl × volume of HCl used

moles of HCl = 0.100 mol/L × 0.0500 L

moles of HCl = 0.00500 mol

Since the reaction is 1:1 between HCl and NH3, the number of moles of NH3 in the cloudy ammonia solution is also 0.00500 mol.

The volume of the cloudy ammonia solution used is 25.00 mL, which is equivalent to 0.02500 L.

The concentration of ammonia in the cloudy ammonia solution is:

concentration of NH3 = moles of NH3 / volume of cloudy ammonia solution

concentration of NH3 = 0.00500 mol / 0.02500 L

concentration of NH3 = 0.200 mol/L or 0.200 M

Therefore, the concentration of ammonia in the cloudy ammonia solution is 0.200 M.

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Answer:

The maximum number of molecules that one water molecule can hold through hydrogen bonding is 4 because the two hydrogen atoms of water can form two hydrogen bonds and the two lone pairs on oxygen can also form two hydrogen bonds. hope it helps

The maximum mass of titanium that can be obtained from 500 tonnes of titanium(IV) chloride in this reaction is 24,000 tonnes.

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Answer:

Explanation:I would put argument 2, because C.jejuni is bad r

After 20 minutes, there would be 0.75 kilograms of salt in the tank.

1. Let's derive the differential equation that y(t) satisfies. The rate at which salt is added to the tank is given by the concentration of the solution (0.5 kg/L) multiplied by the rate at which the solution is added (6 L/min). The rate at which salt is drained from the tank is given by the concentration of salt in the tank (y(t) kg/L) multiplied by the rate at which the solution is drained (4 L/min). Therefore, the differential equation is:

dy/dt = (0.5 kg/L * 6 L/min) - (y(t) kg/L * 4 L/min)

Simplifying further, we have:

dy/dt = 3 - 4y(t)

2. To find the amount of salt in the tank after 20 minutes, we can solve the differential equation. One approach is to find the particular solution by assuming y(t) takes the form of a constant, y. Substituting this into the differential equation, we have:

dy/dt = 3 - 4y

Setting dy/dt to zero (since y is constant), we can solve for y:

0 = 3 - 4y

4y = 3

y = 3/4

y = 0.75 kg

Therefore, after 20 minutes, there would be 0.75 kilograms of salt in the tank.

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We recover 4.583 gm of the compound in the ether when the compound has a distribution coefficient of 11.

Let S be the compound

Vaq = volume of water = 20ml

Vether = volume of ether = 20 ml

Distribution coeffiecient D = S_ether/ S_ water

assuming the compound was in water initially and using conservation of mass

moles of S in water initially = moles of S in water later + moles of S in ether

[Saq]1 = (mol Saq)1/ Vaq               (1)

[Sether] 1 = (mol Sether)1 / Vether     (2)

putting equation 2 in 1

[Sether]1 = (mol Saq)0  - (mol Saq)1 / Vether

(mol Saq)1 / (mol Saq)0 = Vaq / D. Vether + Vaq

which gives the fraction of S that remains in water after 1st extraction

(q_aq)1 = Vaq / D. Vether + Vaq = 20 / 11*20 + 20 = 0.0833

The amount of compound we will recover in ether = (1 - q_aq) * ( amt. of the compound) = (1 - 0.0833) * ( 5) = 4.583 gm

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B. intermolecular attractions.

Answer:

13.2 g Na2CO3

Explanation:

Convert 10.0 g NaOH to mol.

10.0 g x 1 mol/39.997 g = 0.250 mol

Use mol ration given by the equation: 2 mol NaOH to 1 mol Na2CO3

0.250 mol NaOH x 1 mol Na2CO3/2 mol NaOH = 0.125 mol Na2CO3

Finally, convert the moles of Na2CO3 to grams.

0.125 mol Na2CO3 x 105.99 g/1 mol = 13.2 g

According to stoichiometry,13.25 g of sodium carbonate is produced when 10 g of sodium hydroxide reacts with carbon dioxide.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

For the given reaction according to stoichiometry 2 molecules of sodium hydroxide react to  give 1 molecule of  sodium carbonate.

That is 80 g sodium hydroxide gives 106 g sodium carbonate

∴10 g sodium hydroxide will produce 10×106/80=13.25 g of sodium carbonate.

Thus, 10 g sodium hydroxide produces 13.25 g of sodium carbonate.

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Answer:

yep.. I am wide awake here.

yep

ExPlAnAtIoN:

yezs and nozs

Answer:

Two Electrons.

Explanation:

Strontium is the atom with atomic number 38, and electron configuration is [Kr] 5S^2 which mean just two electrons more than Krypton which one of the Noble gases.

The element that contains atoms with an average mass of 1.79 x 10²² grams is Kr (Krypton).

The element that contains atoms with an average mass of 1.79 x 10²² grams is Kr (Krypton).

An element is a chemical substance in which all atoms have the same number of protons. There are around 118 known elements, which are identified by their atomic numbers, which represent the number of protons in their nuclei.

Krypton (Kr) is a chemical element with the atomic number 36. It is a noble gas with a symbol of Kr. Its boiling point is around minus 243 degrees Celsius. The density of krypton is 3.749 grams per cubic centimeter.

Krypton was found by Sir William Ramsay and Morris Travers in 1898, in the residue left over after liquid air had boiled away.

It is an odorless, tasteless, colorless, and non-toxic gas that can be obtained from liquefaction of air. Krypton is often utilized in flash bulbs used in high-speed photography and sometimes in fluorescent lights.

Therefore, the element that contains atoms with an average mass of 1.79 x 10²² grams is Kr (Krypton).

Hence, the correct answer is "Kr".

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Answer:

convection

Explanation:

111900g  is the weight of an object that has the area of 74.6 m² and exerts a pressure of 1500 N/m².

Weight being a force The SI unit for weight is Newton (N), which also happens to be the same as the SI unit for force. When we look at how weight is expressed, we can see how it depends on both mass as well as the acceleration caused by gravity; while the mass might not vary from one location to another, the acceleration caused by gravity does.

Pressure = thrust/ area

              = weight/ area

1500  = weight/ 74.6

weight = 111900g

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The growth of the balloon after being taken out of liquid nitrogen is a result of the increase in temperature, which leads to an increase in the kinetic energy and speed of the gas molecules, causing them to spread out and expand, resulting in the expansion of the balloon.

The phenomenon you are describing, where a small, partially inflated balloon grows in size after being taken out of liquid nitrogen, can be explained by the principles of gas expansion due to temperature change.

When the balloon is submerged in liquid nitrogen, it is exposed to an extremely low temperature. As a result, the air molecules inside the balloon lose thermal energy and their average kinetic energy decreases. This decrease in kinetic energy causes the molecules to slow down and move closer together, leading to a decrease in pressure and volume of the gas inside the balloon.

When the balloon is removed from the liquid nitrogen and placed on the table, it starts to warm up. As the temperature increases, the air molecules regain thermal energy and their average kinetic energy rises. This increase in kinetic energy causes the molecules to move faster and spread out, leading to an increase in pressure and volume of the gas inside the balloon.

Furthermore, gases typically exhibit a property known as Thermal expansion, which means they expand when heated and contract when cooled. As the temperature of the air inside the balloon rises, the gas expands, causing the balloon to grow in size.

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1) List known values.

sample: 0.600 mol

Pressure: 1.0 atm

Temperature: 15ºC

Constant: 0.082057 L⋅atm⋅K−1⋅mol−1

List unknown values

Volume:

2) Set the equation and solve for V.

3) Converting to proper units.

15ºC + 273.15 = 288.15 K

4) Plug in known values.

n: 0.600 mol

R: 0.082057 L⋅atm⋅K−1⋅mol−1

T: 288.15 K

P: 1.0 atm

The sample will occupy a volume of 14.19 L.

Answer:

the answer is B Astroid Belt

Fluorine atoms = 1.517 x 10²³

The mole is the number of particles contained in a substance

1 mol = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

\(\large{\boxed{\boxed{\bold{mol=\frac{mass}{molar\:mass}}}}\)

Proust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison so that the compound has a fixed composition of elements

\(\tt mass~F=\dfrac{4.Ar~F}{MW~C_2F_4}\times mass~C_2F_4\\\\mass~F=\dfrac{4.19}{100}\times 6.3=4.788~gr\)

\(\tt =\dfrac{4.788}{19}=0.252\)

\(\tt 0.252\times 6.02\times 10^{23}=1.517\times 10^{23}\)