assign formal charges to each atom in the two resonance forms of cocl2 .

1000 grams of nitroglycerin 2% ointment should be mixed with the ointment base to obtain 100 grams of an ointment with a concentration of 0.2%.

To determine the amount of nitroglycerin 2% ointment needed to mix with an ointment base to obtain 100 grams of an ointment with a concentration of 0.2%, we can use the concept of a proportion.

Let's set up the proportion:

(grams of nitroglycerin 2% ointment) / 2% = 100 grams / 0.2%

To solve for the grams of nitroglycerin 2% ointment, we can cross-multiply and then divide:

(grams of nitroglycerin 2% ointment) = (2% / 0.2%) * 100 grams

Calculating the right side of the equation:

(grams of nitroglycerin 2% ointment) = (2 / 0.2) * 100 grams

                                = 10 * 100 grams

                                = 1000 grams

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We need  the volume of 1.88 mL of 1.40 M SrCl2 to prepare 525 mL of 5.00 mM SrCl2 solution.

To answer  we need to use the formula:
C1V1 = C2V2
where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.
We are given that the initial concentration (C1) is 1.40 M and we want to prepare 525 mL of a solution with a final concentration (C2) of 5.00 mM (millimolar). To convert mM to M, we need to divide by 1000, so the final concentration in M is 0.005 M.
Using the formula above, we can solve for the initial volume (V1):
C1V1 = C2V2
1.40 M x V1 = 0.005 M x 525 mL
V1 = (0.005 M x 525 mL) / 1.40 M
V1 = 1.88 mL
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Answer:

unbalanced

Explanation:

because it is REACTing.

Atoms are the basic building blocks of ordinary matter. Atoms can join together to form molecules, which in turn form most of the objects around you. The protons and neutrons cluster together in the central part of the atom, called the nucleus, and the electrons 'orbit' the nucleus.

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Each reproductive cell has only one copy of each gene because it has a haploid number of genes.

The expression a haploid number of genes is used to denote that meiotic reproductive gamete cells only contain a set of chromosomes in opposition to mitotic somatic cells that are diploid because they contain two complete sets of chromosomes.

Therefore, with this data, we can see that the haploid number of genes only has a complete set of different chromosomes in the meiotic gametic types of cells.

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Wascana Chemicals should use emissions reduction technologies to reduce the amount of sulphur dioxide emitted during paint production.

To comply with the Ministry of Environment's directive, Wascana Chemicals, a paint manufacturer, needs to reduce the amount of sulphur dioxide released during paint production. This can be accomplished through the use of emissions reduction technology, such as scrubbers, catalytic converters, or gasification systems.Scrubbers are devices that use a wet process to remove pollutants from gas streams. The gas stream is forced through a scrubbing solution that traps pollutants, including sulphur dioxide.Catalytic converters, on the other hand, use a chemical process to transform pollutants into less harmful substances. Gasification systems convert solid or liquid materials into a gas, which can be combusted to generate energy.

In conclusion, to comply with the Ministry of Environment's emissions reduction regulations, Wascana Chemicals should consider implementing one or more emissions reduction technologies such as scrubbers, catalytic converters, or gasification systems to reduce the amount of sulphur dioxide emitted during paint production.

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Answer:

39.0983 u.

Explanation:

Explanation:

Copper does not react with HCl to give H2 gas.

The statement about atoms that is FALSE from the following options is: B) Atoms are responsible for the sensation of smell.

What is an atom?

An atom is the smallest possible unit of matter that retains the chemical and physical characteristics of a component. Each element is made up of a unique kind of atom that has the same number of protons in its nucleus. In the periodic table, elements are arranged by atomic number.The following are the given options:A) Atoms compose all matter.B) Atoms are responsible for the sensation of smell.C) Atoms are the basic building block of nature.D) An atom is the smallest identifiable unit of an element.E) All of the above statements are true.Out of these given options, B) Atoms are responsible for the sensation of smell is the FALSE statement. The sensation of smell is produced by olfactory receptors in the nasal cavity, which are stimulated by molecules of various shapes and sizes.

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In this question, we have a situation where an ice cube is placed in a glass of hot water, which means we have a situation of exothermic and endothermic reactions occurring.

The endothermic reaction will be related to the ice cube, since this cube will increase its temperature, and in order to do that, the cube needs to absorb energy, and this thermal energy will come from the hot water

The exothermic reaction is the hot water releasing this thermal energy to its surroundings, and then the temperature will decrease as well

The options that are the answers will be:

C

F

Letter B should be the opposite, -qwater = qice, and letter A doesn't show the positive or negative sign

Considering the Boyle's law, the new volume becomes 1,148,344.444 mL or 1148.34 L.

Boyle's law relates pressure and volume, stating that the volume occupied by a given mass of gas at constant temperature is inversely proportional to pressure. This means that if the pressure increases, the volume decreases, while if the pressure decreases, the volume increases.

Boyle's law is expressed mathematically as:

P×V=k

Now it is possible to assume that you have a certain volume of gas V1 which is at a pressure P1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the pressure will change to P2, and the following is true:

P1×V1=P2×V2

In this case, you know:

Replacing in the Boyle's law:

10335.1 atm ×250 mL= 2.25 atm×V2

Solving:

(10335.1 atm ×250 mL)÷ 2.25 atm= V2

1,148,344.444 mL= 1148.34 L=  V2

Finally, the new volume becomes 1,148,344.444 mL or 1148.34 L.

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Answer:  The intertidal or littoral zone maintains a balance between the land and the sea. It provides a home to specially adapted marine plants and animals.

Explanation: The intertidal zone is the area where the ocean meets the land between high and low tides. A tide pool within Monterey Bay National Marine Sanctuary. Intertidal zones exist anywhere the ocean meets the land, from steep, rocky ledges to long, sloping sandy beaches and mudflats that can extend for hundreds of meters.

The equilibrium vapor pressure with respect to water (eow) is 259.9 Pa. assume that saturation vapor pressure is same as equilibrium vapor pressure.

Therefore, the RH at the frost point is  

RH = (eow / saturation vapor pressure) × 100

= (259.9 Pa / 259.9 Pa) × 100

= 100%

b) At T = -11 °C, we need to compare the equilibrium vapor pressure with respect to water (eow) and the equilibrium vapor pressure with respect to ice (coi) to determine if ice particles will form. From the given table, at T = -11 °C, the equilibrium vapor pressure with respect to water (eow) is 237.7 Pa, and the equilibrium vapor pressure with respect to ice (coi) is 165.3 Pa.

The air is supersaturated with respect to ice, and the presence of Kaolinite particles can provide surfaces for water droplets to condense onto, leading to the formation of ice particles.

c) At T = -12 °C, we compare the equilibrium vapor pressure with respect to water (eow) and the equilibrium vapor pressure with respect to ice (coi). From the given table, at T = -12 °C, the equilibrium vapor pressure with respect to water (eow) is 217.3 Pa, and the equilibrium vapor pressure with respect to ice (coi) is 181.2 Pa.

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Answer:

a. the 5-gram piece of ice will melt at a lower temperature and it will take less time to melt

Explanation:

Answer: Water molecules from the dilute to the concentrated solution

Explanation:

During Osmosis if a solution is separerated by a semipermeable membrane, the solvent (typically water) from the less concentrated solution in terms of solute goes through the semipermeable membrane to the solution with the higher concentration so that the concentrations between the solutions can be balanced.

With the above solutions therefore, water molecules would move from the solution of 0.4M of sugar to the solution with a 0.7M of sugar through the semipermeable membrane.

During osmosis, water molecules move from the dilute to the concentrated solution.

OSMOSIS:

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Answer: Nitrogen and Oxygen

Answer:

its D

Explanation:

Brooke should turn so that her back is to the Sun to her wall, and hold the Moon (ball representing Moon) in front of her. Therefore, option (D) is correct.

The eclipse of the moon occurs when the earth comes in between the sun and the moon. The earth blocks the light coming from the sun from reaching the surface of the moon and casts its shadow on the moon.

A lunar eclipse occurs on a full moon day and can be observed up to 3 lunar eclipses per year.  A lunar eclipse can be categorized depending on how the sun, the moon, and the earth line up.

A partial lunar eclipse is when only a part of the moon moves into the shadow's earth. A total lunar eclipse is when the earth crossed directly in front of the moon and casts its shadow.

If Brooke's head is earth then it will be in the center and her back will be towards to sun poster on the wall. So that the ball in her hand can play as a moon to show the lunar eclipse.

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Balanced equation

2Al(ClO₃)₃ + 3BaSO₄⇒ Al₂(SO₄)₃ + 3Ba(ClO₃)₂

Given

Word equation

Required

Chemical equation

Solution

Chemical equations can be expressed in

Aluminum chlorate = Al(ClO₃)₃

Barium sulfate = BaSO₄

Aluminum sulfate = Al₂(SO₄)₃

Barium chlorate = Ba(ClO₃)₂

Al(ClO₃)₃ + BaSO₄⇒ Al₂(SO₄)₃ + Ba(ClO₃)₂

2Al(ClO₃)₃ + 3BaSO₄⇒ Al₂(SO₄)₃ + 3Ba(ClO₃)₂

The balanced equation of the given equation would be:

\(2Al(ClO_{3} )_{3} + 3BaSO_{4}\) ⇒ \(Al_{2}(SO4)_{3} + 3Ba(ClO_{3})_{2}\)

Given that,

Aluminum Chlorate  +  Barium Sulfate → Aluminum Sulfate + Barium Chlorate

In chemical form, it would be written as:

\(Al(ClO_{3} )_{3} + BaSO_{4}\) ⇒ \(Al_{2}(SO_{4})_{3} + Ba(ClO_{3})_{3}\)

After balancing the two sides, the equation will read as:

\(2Al(ClO_{3} )_{3} + 3BaSO_{4}\) ⇒ \(Al_{2}(SO4)_{3} + 3Ba(ClO_{3})_{2}\)

Thus, \(2Al(ClO_{3} )_{3} + 3BaSO_{4}\) ⇒ \(Al_{2}(SO4)_{3} + 3Ba(ClO_{3})_{2}\) is the correct answer.

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Answer:

The enthalpy of reaction is -185 kJ

Explanation:

To get the reaction:

 H₂(g) + Cl₂(g) → 2 HCl(g)

you must follow the following steps:

1)  Reactive molecules must break their bonds to obtain their atoms.

H₂(g) → 2 H(g)

Cl₂(g) → 2 Cl(g)

Bond energy (or enthalpy) is the energy required to break one mole of bonds of a gaseous substance. In the case of diatomic molecules with a single bond, it corresponds to the energy necessary to dissociate 1 mole of said substance in the atoms that form it.

Whenever you want to break links you must supply energy, so the link enthalpy will have positive values; while when a mole of bonds is formed energy is released and the bond enthalpy of this process will be negative.

In this case you will then have:

H₂(g) → 2 H(g)           ΔH=436 kJ/mol

Cl₂(g) → 2 Cl(g)         ΔH=243 kJ/mol

So the total energy needed to break all the bonds is:

ΔH=1 mol*436 kJ/mol +1 mol* 243 kJ/mol= 679 kJ

2) The atoms that were obtained in the break of the bonds must be combined to obtain the product.

2 H (g) + 2 Cl (g) → 2 HCl (g)

Being the single bond energy for one mole of 431 kJ H-Cl bonds and considering that two moles of H-Cl bonds are formed, the ΔH is:

ΔH = -2 moles* (432 kJ/mol) = -864 kJ

As mentioned, when a mole of bonds is formed energy is released, the bond enthalpy of this process will be negative.  So the formation of HCl is negative.

Hess's law states that the energy change in an overall chemical reaction is equal to the sum of the energy changes in the individual reactions comprising it. So:

ΔHtotal= -864 kJ + 679 kJ

ΔHtotal= -185 kJ

The enthalpy of reaction is -185 kJ

Answer:

you did not add a question so I cannot help you out sorry

Explanation:

The molarity of the solution is 2.50 M (reported to two significant figures).

To find the molarity of the solution, we need to calculate the number of moles of calcium nitrite (Ca(NO2)2) and then divide it by the volume of the solution in liters.

First, we need to calculate the number of moles of calcium nitrite:

Mass of calcium nitrite (Ca(NO2)2) = 120 grams

Molar mass of Ca(NO2)2 = (40.08 g/mol + 2 * (14.01 g/mol + 16.00 g/mol)) * 2

= (40.08 g/mol + 2 * 30.02 g/mol) * 2

= (40.08 g/mol + 60.02 g/mol) * 2

= 100.10 g/mol * 2

= 200.20 g/mol

Number of moles = Mass / Molar mass

= 120 g / 200.20 g/mol

= 0.5994 mol

Next, we need to calculate the volume of the solution in liters:

Volume = 240 ml = 240/1000 L = 0.240 L

Finally, we can calculate the molarity (M) using the formula:

Molarity (M) = Number of moles / Volume

= 0.5994 mol / 0.240 L

= 2.50 M

Therefore, the molarity of the solution is 2.50 M (reported to two significant figures).

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Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit. Stability is the reason that causes atoms  to bond together to form molecules.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. In the nucleus, proton and neutron are present.

Every atoms want to gain stability. To gain stability atoms have to gain noble gas configuration that is outermost shell must contain 2,8, 18 electrons. The atom should follow octet rule. Stability lowers the energy of an atom.

Therefore stability is the reason that causes atoms  to bond together to form molecules.

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Answer:

500/100=5m

W=F*D

W=20*5=100Nm

Explanation:

The work done in Nm on the object is 100 Nm

Since A force of 20N acts on an object. It causes a displacement of 500 cm in the direction of the force.

Since the displacement is in cm

So, in meters, it should be like

= 500 / 100

= 5 m

Now we know that

Work done = force * displacement

= 20N * 5

= 100 Nm

hence, The work done in Nm on the object is 100 Nm

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Answer:

false

Explanation:

The equilibrium state of a biochemical reaction is approached more rapidly in the presence of a catalyst.

Aldehyde is created in the Rosenmund reaction by reducing acid halides with hydrogen gas while palladium is present. If a catalyst is not poisoned, the reaction does not halt at the aldehyde level, which is an alcohol feather reducer. to halt at the aldehyde level. Barium sulfate contaminates palladium.

The catalyst and the reaction are in separate states of matter in heterogeneous catalysis. 

1) Adsorption of reactant molecules activation center is the key phase in this process.

2) The center forms an activation complex.

3)The complex breaks down into products.

4) Product desorption from the catalyst's surface.

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Certain e-cigarette devices with high-power settings and sub-ohm coils can emit higher levels of metals, such as nickel and silver, compared to regular cigarettes.

There is evidence to suggest that certain types of electronic cigarettes (e-cigarettes) can emit higher levels of metals, including nickel and silver, compared to regular cigarettes.

However, it's important to note that the specific metal emissions can vary depending on various factors, such as the design, construction, and use of the e-cigarette device.Research studies have found that e-cigarette aerosols can contain metals such as nickel, silver, lead, chromium, and cadmium, among others.

The levels of these metals can vary significantly between different e-cigarette brands, models, and even individual devices. Some studies have reported higher levels of certain metals in e-cigarette aerosols compared to regular cigarette smoke, while others have found similar or lower levels.

It's worth mentioning that the presence of metals in e-cigarette aerosols can be attributed to several factors, including the heating element used in the device, the composition of the e-liquid, and the temperature at which the device operates.

Certain types of e-cigarette coils or atomizers, particularly those made from low-grade materials or with poor construction, may lead to increased metal emissions.To minimize potential exposure to metals, it is advisable to choose e-cigarette devices from reputable manufacturers and to avoid using low-quality or counterfeit products.

Additionally, following proper maintenance and cleaning procedures for e-cigarette devices can help reduce the risk of metal contamination.

It is important to note that while e-cigarette aerosols may contain higher levels of certain metals compared to regular cigarettes, the overall health risks associated with e-cigarette use are still being studied.

E-cigarettes are generally considered to be less harmful than traditional cigarettes, but they are not without risks, especially for non-smokers and young people. It is always recommended to exercise caution and make informed decisions regarding any form of nicotine or tobacco product use.

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Answer:

\(2.71(10^{25})\) molecules

Explanation:

Remember 1 mol is equal to Avogadro's number

\(45 mol (\frac{6.02(10^{23}) molecules}{1 mol})\)