in the following reaction, what type of bond is holding the two atoms together? k cl k cl- kcl group of answer choices hydrophobic hypertonic covalent ionic

Electrons contribute greatly to the atom's charge, as each electron has a negative charge equal to the positive charge of a proton. Scientists define these charges as “+1” and “-1. ” In an uncharged, neutral atom, the number of electrons orbiting the nucleus is equal to the number of protons inside the nucleus.:

Answer:

thick, insulating fur

Explanation:

If an animal lives in a freezing climate, it makes sense logically that the animal would adapt and develop a layer of thick fur to keep its body insulated and maintain homeostasis.

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Answer:

d = distance traveled by her on her bicycle on a long flat road = 24 kilometer

t = time taken by her to travel distance "d" on her bicycle on a long flat road = 1.2 hours

v = average speed of vivian = ?

we know that average speed is given as

v = d/t

inserting the values in the above formula

v = 24 kilometer / 1.2 hour

v = 20 kilometer/hour

hence the correct choice is

C) 20 km/h

As the first five elements in group 14 are considered in order from top to bottom, there are changes in both the electronegativity values and atomic radii changes.

The columns of the periodic table that contain elements with the same number of valence electrons are referred to as groups. The atomic size of the elements grows as one moves from top to bottom in the 14th group of the periodic table, while electronegativity drops. All elements will have an equal number of electrons in their initial shell and their outermost shell. Thus, changes in atomic radii and electronegativity levels.

Further, The group 14 elements exhibit the periodic table's broadest variation of the chemical behaviour of any group. In general, the electronegativity falls as we advance down the group. Ionization energies drop as atomic radii rise within the group. Down the group, the metallic characteristics also get stronger.

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2.49 x \(10^{-4}\) moles is equal to 1.5×\(10^{20}\). The number of moles is equal to the number of molecules divided by Avogadro's number, 6.022×\(10^{23}\).

This means that 1.5×\(10^{20}\)moles are equal to

1.5×\(10^{20}\)/6.022×\(10^{23}\)

0.24908×\(10^{-3}\)

2.49 x \(10^{-4}\) moles.

Avogadro's number: Avogadro's number is a constant used in chemistry to represent the number of atoms or molecules in a mole of a substance. It is equal to 6.022 x \(10^{23}\). Or we can say that Avogadro's number is, the number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.02214076 × 1023. The units may be electrons, atoms, ions, or molecules, depending on the nature of the substance and the character of the reaction.

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Answer:

B. Experiments test the scientists' ideas.

Explanation:

Experiments helps scientist test the ideas.

Experiment is simply an act of performing a controlled test about an idea.

Before an experiment is made, observations using senses must be deduced from the environment at first.

Observations leads to the formulation of hypothesis.

Hypothesis are more or less a scientific predictions.

Most hypothesis presents variables that can be tested.

The test of a hypothesis is an experiment.

Experiments help us makes controlled test about a scientific observation in a laboratory.

The second option!

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The 20.16 grams of magnesium oxide is formed in this reaction.

To determine the mass of magnesium oxide formed in the reaction, we need to calculate the limiting reactant and then use the stoichiometry of the balanced chemical equation to find the corresponding mass of the product.

The balanced chemical equation for the reaction is:

2 Mg + O2 -> 2 MgO

Given:

Mass of magnesium (Mg) = 24.3 grams

Mass of oxygen gas (O2) = 16.0 grams

1: Calculate the moles of each reactant.

Moles of magnesium (Mg) = mass / molar mass = 24.3 g / 24.31 g/mol = 1.00 mol

Moles of oxygen gas (O2) = mass / molar mass = 16.0 g / 32.00 g/mol = 0.500 mol

2: Determine the limiting reactant.

The ratio of Mg to O2 in the balanced equation is 2:1. Since there are fewer moles of oxygen gas (0.500 mol) compared to magnesium (1.00 mol), oxygen gas is the limiting reactant.

3: Calculate the moles of magnesium oxide formed.

From the balanced equation, 2 moles of Mg react to form 2 moles of MgO.

Therefore, the moles of MgO formed is also 0.500 mol.

4: Calculate the mass of magnesium oxide formed.

Mass of magnesium oxide (MgO) = moles × molar mass

Mass of magnesium oxide (MgO) = 0.500 mol × 40.31 g/mol = 20.16 grams

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Increasing LED brightness with a lampshade or reflection and choosing LED lights with high luminous efficiency can be useful  to obtain a brighter lamp.

Lamp, lighting device, initially a jar housing a flame soaked in flammable substance, and later such light-producing devices as gas and electrical lamps.

The light was developed at least 70,000 years ago. Originally, it was a sunken rock filled in moss or other absorbent substance, saturated in animal fat, and burned. The ways to obtain a brighter lamp are

Increasing LED brightness with a lampshade or reflection.

To boost brightness, use greater color temperature LED lights.

Choosing LED lights with high luminous efficiency.

With increased voltage, LED lights get brighter.

Therefore, in above ways we can get brighter lamp.

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Answer:

See explanation

Explanation:

Electronegativity is the ability of an atom in a compound to attract the shared electron pair of a bond towards itself.

Electronegativity is one of the periodic trends. It decreases down the group and increases across the period. This implies that as you move from left to right in the periodic table, atoms of elements become more electronegative.

Remember also that non-metallic property increases from left to right in the periodic table. This means that as you move from left to right, metallic properties such as thermal conduction decreases.

It then follows that as electronegativity increases, electrical conductivity decreases from left to right in the periodic table.

Answer: Milk and chocolate/ oil and water are solution whereas fruit salad and air are mixtures

Answer:

D.

Explanation:

Answer:

Explanation:

                                             PCl₅    ⇄    PCl₃    +     Cl₂

                                           1 mole         1 mole        1 mole

molecular weight of  PCl₅ = 208.5

molecular weight of PCl₃  = 137.5

molecular weight of Cl₂  =       71

moles of PCl₅ = .0185

moles of PCl₃ = .0924

moles of Cl₂ = .1873

Total moles = .2982 moles

mole fraction of PCl₅ = .062

mole fraction of  PCl₃ = .31

mole fraction of Cl₂ = .628

If total pressure be P

partial pressure of  PCl₅ = .062 P

partial pressure of  PCl₃ = .31 P

partial pressure of  Cl₂ = .628 P

Kp = .31 P  x  .628 P /  .062 P

= 3.14 P

To calculate Total pressure P

PV = nRT

P x 4 x 10⁻³ = .2982 x 8.31  x 600

P = 371.7 x 10³

= 3.717 x 10⁵ Pa

Kp = 3.14 P = 3.14 x  3.717 x 10⁵ Pa

= 11.67 x 10⁵ Pa

Kp  = Kc x \(( RT )^{\triangle n}\)

\(\triangle n\) = 1

11.67 x 10⁵ = Kc x \(( 8.31\times 600 )^{1}\)

Kc = 234

The solid that has the lowest solubility at 10°C is substance D

A solubility curve is a graphic representation of a solute's solubility in a particular solvent at different pressures and temperatures. A material's solubility, which is often expressed in grams per 100 milliliters (g/100 mL) of solvent, is the maximum quantity of the substance that can dissolve in a given amount of solvent at a particular temperature and pressure.

This is because, the solubility of the substance D as we can see from the curve is closest to zero around 10°C .

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Answer:

Substance D

Explanation:

its right on acellus

Answer:

idrk im sorry and iknow this didnt help bt im sorry

Explanation:

To keep burning, fires require oxygen. Carbon dioxide is used in certain fire extinguishers to put out flames. Explanation: Because magnesium is higher on the reactivity scale than carbon, it is more reactive and eliminates oxygen from carbon dioxide (to give carbon and magnesium oxide).

AgCl is more likely to dissolve in water when ammonia (NH3) is present. This is due to the fact that ammonia and AgCl may combine to create the water-soluble complex ion, Ag(NH3)2+.

At 25°C, the solubility of AgCl in water is 0.0020 g of AgCl per litre of H2OS.

AgCl dissolves in NH3 at a rate of 14.00 g per kilogramme of NH3 when the temperature is 25°C. Due to the production of the soluble stable complex [AgNH32]+, AgCl is more soluble in NH3. Since oxygen is more electronegative than nitrogen, ammonia is less polar than water.

AgCl is well known to be insoluble in water whereas NaCl and KCl are soluble in the pedagogical literature: implementations of Elementary studies of both qualitative and quantitative analysis make this distinction.

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The similar skeletal arrangements in different animals with different functions can be explained by convergent evolution, where different structures evolve independently in different species to serve a similar function.

The similar skeletal arrangements in different animals can be attributed to evolutionary adaptations. The evolution of different species can result in anatomical structures that have similar functions but are not necessarily homologous in origin. For example, the wings of bats and birds have a similar function of enabling flight, but they have different skeletal arrangements.

This is because the wings of bats evolved from their forelimbs, whereas the wings of birds evolved from their feathers. Similarly, the fins of fish and the flippers of whales have a similar function of propulsion, but they have different skeletal arrangements. This is because the fins of fish evolved from their ancestral limbs, whereas the flippers of whales evolved from their modified limbs.

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Answer:

Fossils also help us to infer why dinosaurs and other organisms became extinct. Fossils tell us that there was a mass extinction at the time of the dinosaurs. They died out about 65 million years ago, along with more than half of all the other animal and plant species. ... Without plants, dinosaurs could not survive.

Explanation:

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Answer:

Your answer will be C. 1/32

Answer:

C. 1/32

Explanation:

Answer: no water

Explanation:

Answer:

a substance that is a crystalline compound, contains no water

Answer:

I'm the constant, volume and shape are both definite. Constant means that those characters are not changeable in the same common volume and shape or both.

Answer:

B- why or how because any scientist deals with matter it's relationships ,properties and its composition which can be inferred from the questions why and how

Answer:

The theory of plate tectonics explains how continental movements could occur

Explanation:

Answer:

The theory of plate tectonics does not explain how continental movements could occur.

Explanation:

Answer:

person and earth since they are closer to the core ? maybe

448 K is the final temperature of the water.

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases by 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

Given,

the mass of Na is 23 g

The volume of water = 293 cm3

Mass of water = 293 g

Total solution mass = 23 g + 293 g = 316 g

Specific heat capacity of water = 4.18 J/Kg

The equation relating mass, heat, specific heat capacity and temperature change is:

q = mcΔT

197 kJ = 316 g x 4.18 J/Kg x (\(T_{finals} - T_ {initial}\))

197 kJ = 316 g x 4.18 J/Kg x ( \(T_{finals}\)-298 K)

0.1491429956 x 1000 =  \(T_{finals}\)-298 K

149.1429956 + 298 = \(T_{finals}\)

447.1429956 = \(T_{finals}\)

448 K = \(T_{finals}\)

Hence, 448 K is the final temperature of the water.

A high specific heat capacity means that it can store a large amount of thermal energy for a small change in mass or temperature.

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Answer:

One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.

The oxidation number of Na in the compound Na2CO3 is +1.

To determine the oxidation number of Na in Na2CO3, we need to consider the known oxidation numbers of other elements and the overall charge of the compound.

1. The compound Na2CO3 contains two Na atoms and one C atom, along with three O atoms.

2. Oxygen (O) typically has an oxidation number of -2, unless it is in a peroxide where it is -1.

3. Carbon (C) is more electronegative than hydrogen (H) but less electronegative than oxygen (O), so it usually has an oxidation number of +4 in compounds.

4. The compound Na2CO3 has a neutral charge, which means the sum of the oxidation numbers of all the elements must be zero.

5. Let's assign the oxidation number of Na as x. Since there are two Na atoms, the total oxidation number contribution from Na is 2x.

6. The oxidation number of C in CO3 is +4, and the oxidation number of O is -2. Since there are three O atoms in CO3, the total oxidation number contribution from O is 3*(-2) = -6.

7. Setting up the equation: 2x + 4 + (-6) = 0.

8. Solving the equation: 2x - 2 = 0, 2x = 2, x = 1.

Therefore, the oxidation number of Na in Na2CO3 is +1.

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Answer:

600 mAh·g−1

Explanation:

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