in one of the imvic tests, a green color is a negative test result in this test. question 1 options: a) hydrogen sulfide b) citrate c) methyl red d) indole

Answer:

Explanation:

Hydrosulfuric acid (H_2S) is considered a 'weak acid." It dissociates in water according to this reaction: H_2 S(aq) + H_2O(t) HS^-(aq) + H_3O^+(aq) k_a = 9 times 10^-8 Hydroiodic acid (HI) is considered a "strong acid".

The second temperature of the sample of gas is 24.3°C

The calculation can be done as follows

T1= 27 °c

T2= ?

V1= 10 dm

V2= 9 dm

V1/T1= V2/T2

10/27= 9/T2

Cross multiply

10 ×T2= 9 × 27

T2= 9 × 27/10

= 243/10

= 24.3 °C

Hence the second temperature is 24.3°C

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doing chem alone is fun but in school its not at all  

Answer:

I have correctly written all the formula of the compounds listed. Kindly download/view the image below to access it. Thank you.

Explanation:

Sodium chlorate is known be an inorganic compound which is a white crystalline powder. Magnesium hydroxide, an inorganic compound occurs in nature as mineral brucite. It's a component of antacids. Titanium dioxide is a naturally occurring oxide seen in rutile, anatase, etc. Barium acetate is known to be the salt of barium (II) and acetic acid.

Answer:

The information that they will learn from the graph is how fast the waves will move and which one has the fastest velocity. What they will notice ia that the P wave will be moving faster and arrive first.

Answer: 1265.6037

Explanation:

6.32mL of phosphate solution is needed to completely neutralize the lead in this reaction.

A neutralization reaction is defined as the reaction between an strong acid and strong base to produce a salt and water.

The process of the reacting given volume of acids or bases for the determination of the concentration or volume of the acid or base which is required for neutralization is known as titration in volumetric analysis.

The formula used to determine the volume of the acid is given below:

(Ca × Va) /(Cb × Vb) = Na/Nb

where,

where Ca is the concentration of lead nitrate

Cb is the concentration of sodium phosphate

Va is the volume of lead nitrate

Vb is the volume of sodium phosphate

Na is the moles of lead nitrate

Nb is the moles of sodium phosphate

Concentration of lead nitrate = m/V

= 6.931/(0.1 × 331.2)

= 0.0281 M

Ca = 0.222M

Cb = 0.0281M

Na = Nb = 1

Va = ( 0.0281 × 50) /0.222

= 6.32 mL.

Thus, 6.32mL of phosphate solution is needed to completely neutralize the lead in this reaction.

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All the answers that apply to fission reactions include:

A. release less energy than fusion reactions.

B. requires lower temperatures than fusion reactions.

D. split atomic nuclei apart.

E. are used by power plants to create energy.

In Chemistry, there are two (2) major types of nuclear reaction and these include the following:

Nuclear fusion: this type of nuclear reaction involves the joining of two smaller nuclei of atoms to form a single massive or heavier nucleus with the release of energy.

Nuclear fission: this type of nuclear reaction involves the collision or splitting of a heavy atomic nucleus with a neutron, thereby causing a split and release of energy.

In conclusion, we can reasonably infer and logically deduce that nuclear fission is a type of nuclear reaction that requires lower temperatures than nuclear fusion reactions.

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The right answer is given in the picture.

To find the formula of an ionic compound, first, identify the cation and write down its symbol and charge. Then identify the anion and note its sign and charge. Finally, the two ions combine to form an electrically neutral compound.

Particle diagram Elements and compounds can be represented using particle diagrams. This is a box with colored spheres drawn to represent atoms or molecules. These diagrams can represent elements and compounds and their molecular composition by the types of spheres and how they are connected. Particle diagrams are used to show particles, atoms, or molecules within matter. A diagram showing particles in a substance.

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Answer:

If it is still too liquid, add pasta, rice, tapioca or potato to absorb the excess of liquid. Get inspired by recipes you can make with the ingredients you have at home today.

Explanation:

The electron configuration is 1s², 2s², 2p⁶, 3s²,3p⁶, 4s², 3d¹⁰, 4p⁵ i.e. 35 that is bromine.

Electronic configuration is defined as the arrangement of electrons around the nucleus of a particular atom or molecule.

An atom is made up of particles like protons, neutrons and electrons.

A neutral atom are the atoms with same number of protons and electrons.

Electronic configuration of an atom is defined as distribution of electrons in atoms shells and sub shells.

Bromine is element with symbol Br and atomic number 35. It is a oily liquid with a sharp smell, it is toxic in nature.

The neutral atom of bromine has 35 electrons as the neutral atom has same number of electrons and protons.

Thus, the electron configuration is1s², 2s², 2p⁶, 3s²,3p⁶, 4s², 3d¹⁰, 4p⁵, i.e. 35 that is bromine.

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The grams of SO₂ that would be dissolved in 100 g of 40 degree water to make a saturated solution can be calculated by making solubility curve.

Mass is the quantity of matter of a physical body.

If you want to calculate the mass of Sulfur dioxide in 100 g of 40 degree, you have to make a solution curve.

With the increase in temperature, the solubility increases as well

Thus, the grams of SO₂ that would be dissolved in 100 g of 40 degree water to make a saturated solution can be calculated by making a solubility curve.

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Answer:; 66 g is about 3/2 the value of the molar mass of CO2. It is reasonable that the sample contains 3/2 (1.5) mol.

Explanation:

the answer for this question is Mister

Answer:

Moths are hunted and killed in a variety of ways. I'll explain how we go about hunting and killing moths.

Explanation:

Step-by-Step:

Obtain a sticky trap in the morning and afternoon. It's available at Target and Walmart. Cover it in moth pheromones or anything else you know will attract moths. They will be stuck in the sticky trap for a long time and will eventually die as a result of not being able to escape.

At night, get or buy a lamp and turn it on. This will attract a lot of moths and make them easier to see. Then spray the area with insecticide or insect repellent. Finally, they should perish.

Tip: If a large swarm of moths becomes too much for you to handle, call pest control and they will get rid of them for you!

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Answer:

It will satisfy the law of conservation of mass.

Two substances must make a new substance.

All atoms on both sides of an equation must be the same.

Explanation:

Stay safe, stay healthy and blessed.

Have a blessed day !

Thank you

Answer:

SF6

Explanation:

Octet Rule

The central atom covalent bounds with 6 flourine atoms.

The Avogadro number in chemistry is 6.022 x 10²³ in scientific notation and 6.022E23 in engineering notation.

The Avogadro number, denoted as Nₐ, is a fundamental constant in chemistry that represents the number of atoms or molecules in one mole of a substance. It is approximately equal to 6.022 x 10²³.

In scientific notation, the Avogadro number is written as 6.022 x 10²³. This notation consists of a coefficient (6.022) multiplied by 10 raised to a certain power (23 in this case), indicating the number of zeros to be added after the coefficient.

In engineering notation, the Avogadro number is represented as 6.022E23. Here, the "E" denotes "times ten raised to the power of," and the number following it (23) indicates the exponent.

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Answer:

Poop

Explanation:

Answer:

convergergent

Explanation:

Mountains form where two continental plates collide. Since both plates have a similar thickness and weight, neither one will sink under the other. Instead, they crumple and fold until the rocks are forced up to form a mountain range. As the plates continue to collide, mountains will get taller and taller.

Answer:

force

Explanation:

Answer:

what dose this mean "_" is there an image that could help?

The negative sign means that heat was transferred from the aluminium piece to the ethyl alcohol. Consequently, the heat exchange of the system is roughly -22,770 J, or -2.28 x 10^4 J (to 2 significant figures).

The mixture's temperature rises to 20 C. The mixture in the calorimeter is then dipped into by a metallic block of mass 1 kilogramme at 10°C. The temperature rises to 19 C once thermal equilibrium has been reached.

Q = m * c * T, where Q is the heat exchanged, m is the mass of the substance, c is the specific heat capacity, and T is the change in temperature, is the formula used to determine the heat exchanged.

We can use the following formula to determine the equilibrium temperature:

m_al * c_al * (T_eq - T_al) = m_et * c_et * (T_et - T_eq)

By entering the specified values, we obtain:

(0.100 kg) * (0.902 J/g°C) * (T_eq - 450.0°C) = (0.100 kg) * (2.44 J/g°C) * (80.0°C - T_eq)

Simplifying, we get:

90.2 J/C * (T_eq - 450.0) = 244 J/C * (80.0 - T_eq)

90.2 T_eq - 40590 = 19520 - 244 T_eq

334.2 T_eq = 60110

T_eq ≈ 179.7°C ≈ 180°C (to the nearest 10°C)

As a result, the mixture's equilibrium temperature is roughly 180 °C.

(B) We can apply the same formula as before to determine the system's heat exchange. We can suppose that the mixture has a specific heat capacity equal to that of ethyl alcohol.

Q = m_al * c_al * (T_eq - T_al) + m_et * c_et * (T_eq - T_et)

Plugging in the given values, we get:

Q = (0.100 kg) * (0.902 J/g°C) * (180.0°C - 450.0°C) + (0.100 kg) * (2.44 J/g°C) * (180.0°C - 80.0°C)

Q ≈ -22,770 J ≈ -2.28 x 10⁴ J (to 2 significant figures)

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Answer:

The first one is Propane

The second one is HEPTANE

The third one is octane

The 4th is butane

the 5th is decane

The structures have been named according to IUPAC as \(\rm C_3H_8\) Propane, \(\rm C_7H_{16}\) Heptane, \(\rm C_8H_{18}\) Octane, \(\rm C_4H_{10}\) Butane, and \(\rm C_{10}H_{22}\) Decane.

The images has been the representation of the ball and stick structure of the compounds. The central balls have been the representation of the carbon atom , with small balls attached to the sticks have been the representation of the hydrogen attached.

The following structures has been given as:

The structures have been named according to IUPAC as \(\rm C_3H_8\) Propane, \(\rm C_7H_{16}\) Heptane, \(\rm C_8H_{18}\) Octane, \(\rm C_4H_{10}\) Butane, and \(\rm C_{10}H_{22}\) Decane.

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Answer:

2

Explanation:

Because 2 oxygen atoms in reactant are balanced only when 2H2O is produced.

Answer:

Polar

Explanation:

Electronegativity Difference:

0.7 Non-Polar Covalent = 0 0 < Polar Covalent < 2 Ionic (Non-Covalent) ≥ 2

Answer:

To calculate the percent of copper in copper oxide, you would need to know the mass of copper in the compound and the mass of the compound itself. Once you have this information, you would divide the mass of copper by the mass of the compound and multiply by 100 to express the result as a percentage.

Example:

If the mass of copper in copper oxide is 40 grams and the mass of the compound is 100 grams, the percent of copper in the compound would be:

(40/100) * 100 = 40%

It should be noticed that this is an example, I don't have access to the chemical analysis of your copper oxide.

Explanation:

☁️ Answer ☁️

Option 1: When dissolved, sugar molecules have more opportunities to bond with positive-negative water molecules. Therefore, sugar dissolves faster than salt, because its component molecules are more soluble in water.

❤️

Option 2: Sugar can dissolve easier than salt because when you add 8 spoons of salt into water the salt already starts to stay in the bottom of the cup. And, when you add 30 spoons into water the sugar just starts to stay in the bottom of the cup. It’s almost the same.

Hope it helps.

Have a nice day!~ ￣▽￣❤️

This statement is generally true for most metallic elements.

A cation is an ion with a positive charge, formed when an atom loses one or more electrons.

Metallic elements tend to have relatively low electronegativity values and tend to lose electrons easily due to their large atomic radii, low ionization energies, and low electron affinities.

As a result, they form cations more easily than anions.

When a metallic element loses electrons, its valence shell becomes less populated, leading to a more stable electronic configuration.

This stability is achieved through the formation of a noble gas-like configuration with a complete outer shell.

By losing electrons, metallic elements can achieve a stable electron configuration and become more stable and less reactive.

However, there are some metallic elements that can form anions, particularly those from the groups 14, 15, 16, and 17.

These elements have relatively high electronegativity values and can attract electrons to form anions more easily than cations.

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Answer: They are all true

Explanation:

Helium is a noble gas and non oder and such