What ingredients can be alternative for cornstarch?

Answer:

6

Explanation:

slope= \(\frac{rise}{run}\)

slope=\(\frac{6}{1}\)

slope=6

Answer:

its one half

Explanation:

i learned this last week

Oxygen atoms has the highest electronegativity. Fluorine is the most electronegative element, but francium is one of the least electronegative.

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Answer:

2.28bar

Explanation: Boyle's law P1V1=P2V2 manipulate formula in favor of V2 the new formula should beP1V1/V2

0.895*318/125=2.2768 but to same sigfig it is 2.28

Explanation:

Most objects expand when heated.

Answer: D. get bigger.

Approximately 63.5% of the compound AgNO3 is made of silver.

The atomic mass of silver (Ag) is 107.87 g/mol, and the atomic mass of nitrogen (N) is 14.01 g/mol, and the atomic mass of oxygen (O) is 16.00 g/mol.

The molecular weight of AgNO3 is:

AgNO3 = (Ag atomic mass) + (N atomic mass) + (3 x O atomic mass)

AgNO3 = (107.87 g/mol) + (14.01 g/mol) + (3 x 16.00 g/mol)

AgNO3 = 169.87 g/mol

The percent by mass of silver in AgNO3 can be calculated as:

Percent by mass of silver = (Mass of silver / Total mass of AgNO3) x 100

Since there is only one silver atom in one AgNO3 molecule, the mass of silver in one mole of AgNO3 is equal to the atomic mass of silver, which is 107.87 g/mol.

Therefore, the percent by mass of silver in AgNO3 is:

Percent by mass of silver = (107.87 g/mol / 169.87 g/mol) x 100

Percent by mass of silver = 63.5%

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Answer: B

Explanation:

Protons are similar in aize to neutrons.  they are larger than electrons.

Krypton, Chromium, and Oxygen with the following symbols Kr-13, Cr-2, and O-15 respectively have 23 electrons.

The atomic number of an atom determines the number of electrons it has. When the number of protons is equivalent to the number of electrons, the atom is electrically neutral. An anion, on the other hand, is an atom with a negative charge. It has gained an electron or two, or even more. Below are the chemical symbols for three different atoms or atomic anions with 23 electrons.Krypton:Kr has an atomic number of 36, indicating that it has 36 electrons. However, if we add 13 electrons to it, the total number of electrons becomes 49. Krypton with 13 additional electrons becomes Kr-13, with a total of 49 electrons.Chromium:Cr has an atomic number of 24, indicating that it has 24 electrons. Adding two more electrons to it, the total number of electrons becomes 26. The atomic anion with 26 electrons is Cr-2.Oxygen:Oxygen has an atomic number of 8, indicating that it has 8 electrons. However, if we add 15 electrons to it, the total number of electrons becomes 23. Oxygen with 15 additional electrons becomes O-15, with a total of 23 electrons.

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Answer:

Object C

Explanation:

The object experiencing the greatest gravitational force is C.

This choice is made based on the newton's law of universal gravitation.

It states that "every particle attracts every other particle with a force that is directly proportional to their mass and inversely proportional to the square of the distance between them".

  From the law, we understand that the higher the mass, the higher the force of gravitation.

 The force is inversely proportional to the distance between the two bodies, so, the larger the distance the lesser the force.

From the given choices, mass 5kg of two bodies and distance 1m will yield the greatest gravitational force.

The pair of objects at 1 m distance and 5 kg mass have been experiencing the greater gravitational force. Thus, option C is correct.

Gravitational force has been the force acting on the body with the influence of gravity.

According to the Newton's law of the gravitational force, the force has been directly proportional to the mass of the object and has been inversely proportional to the square root of the distance between the object.

In the given set of objects, the objects with least distance and greater mass have been experiencing the higher gravitational force.

Thus, objects at 1 m distance and 5 kg mass have been experiencing the greater gravitational force. Thus, option C is correct.

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Answer:

B) "When substances are chemically combined, the properties of the new substances that are formed are often different from the properties of the original substances."

Explanation:

From the information given, the question was juxtaposing how dangerous the reactants Sodium and Chlorine were at their elemental, natural states with how harmless the product is by combining both of them. There isn't any other statement beside B which is supported by this.

Usually however, most reactions that make NaCl are done through acid-base titrations because they form the salt and water when neutralized.  

Answer:

B

Explanation:

All substances have their own unique chemical and physical properties. When substances are chemically combined (i.e., when substances undergo a chemical reaction), the properties of the new substances that are formed are often different from the properties of the original substances.

Answer:

Samarium:

Electron configuration:

Samarium

Explanation:

Samarium is a chemical element that belongs to the lanthanoid series. The lanthanoids are the chemical elements that follow lanthanum. They are all known to possess 4f orbitals. The 4f electrons are found in the antepenultimate shell of the elements of the lanthanoid series and they do not take part in chemical bonding. They are neither removed in bonding nor do they take part in crystal field stabilization of lanthanoid complexes.

The electronic configuration of samarium is; 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f6 while the condensed, short hand electronic configuration is [Xe] 4f6 6s2. This corresponds to (noble gas]ns2(n − 2) f6 as required by the question, hence the answer provided above.

The molar mass of the given gas is equal to 68.48 g.

The ideal gas law can be described as an equation of the state of a hypothetical perfect gas. This equation can be represented as the product of the volume and pressure of one-mole perfect gas is equal to the product of the universal gas constant and absolute temperature of that gas.

The mathematically, ideal gas equation can be written as follows:

PV = nRT

Where n is the moles of gas, P is the pressure,  V is the volume of the gas,  and R is the gas constant.

Given, the volume of collected gas, V = 165 ml = 0.165 L

The temperature of the gas, T = 27° C = 273 + 27 = 300 K,

The pressure of gas, P = 765 mmHg = 0.99 atm

The value of the gas constant, R = 0.082 atm L /K mol

Substituting the values V, R, P, and T in the equation, we get:

The number of moles of the gas, n = PV/RT

n = 0.99 ×0.165/(0.082 × 300)

n = 0.0066 mol

The molar mass of the gas = 0.452/ 0.0066 =68.48 g/mol

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11.29 grams of strontium-ninety had been gift withinside the unique rock pattern in 1933. Strontium- ninety decays to yttrium-ninety, which in flip decays to solid zirconium.

The isotopes of strontium and yttrium emit beta debris as they decay. The launch of radiation throughout this decay manner reasons situation approximately the protection of strontium and all different radioactive substances. Sr-ninety may be inhaled, however ingestion in meals and water is the best fitness situation. Once withinside the body, Sr-ninety acts like calcium and is effectively included into bones and teeth, wherein it may purpose cancers of the bone, bone marrow, and smooth tissues across the bone.

Strontium has a half-existence of 28.8 years. Therefore,

1989 - 1933 = 56years.

fifty six / 28.eight = 1.94 half-lives

Thus, the amount of the radioisotope closing will double for every half-existence elapsed. transferring backwards in time. Therefore, transferring backwards in time through 1.94 times half-lives, the amount closing will double through 1.94 times.

Thus, the quantity closing in 1933 is 3.0 × (1.ninety four)² = 11.29 grams.

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Answer:

a) alternate interior angles are congruent

Explanation:

on edgen

For an electron as a particle, E = \(1/2mv^2\)

For an electron as a particle, the energy E can be described using the equation:

E =  \(1/2mv^2\)

where

This equation represents the kinetic energy of the electron, which is the E is the energy

energy associated with its motion.

This equation assumes classical mechanics and does not take into account relativistic effects that become significant at high speeds close to the speed of light.

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At a pressure of 939 mbar, the corresponding height of the mercury in the column of a mercury barometer is approximately 141.9 cm.

The height of the mercury column in a barometer is proportional to the atmospheric pressure. The proportionality constant depends on the density of mercury and the acceleration due to gravity. At standard conditions, the height of the mercury column in a barometer is about 760 mm.

To find the height of the mercury column at a pressure of 939 mbar, we can use the following proportion;

pressure / height = constant

The constant is the product of the density of mercury and the acceleration due to gravity, which we can take as 13,595 kg/m^3 * 9.81 m/s^2 = 133,322 Pa/m.

Substituting the given pressure and the constant, we get;

939 mbar / height = 133,322 Pa/m

Solving for height, we get;

height = 133,322 Pa/m / 939 mbar

= 141.9 cm

Therefore, the height of the mercury in the column of a mercury barometer is 141.9 cm.

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The covalent bond is present in the compound C₃H₈. The reactant C is 3, product C is 6, reactant H is 8, product H is 10, Reactant O is 2, product O is 9.

What is covalent bond ?

Atoms share electron pair between them in covalent bonds. H-H or C-H are examples of nonpolar covalent bonds between atoms with similar or identical electronegativity, whereas polar covalent bonds are formed when unequal electronegativity is shared between atoms (e.g., H–O).

What is reactant ?

Raw materials known as reactants combine to create products. When the right factors, such as temperature, time, or pressure, come into play, the chemical bonds between the reactants are broken, allowing the atoms to form new bonds that lead to various combinations.

Therefore, covalent bond is present in the compound C₃H₈. The reactant C is 3, product C is 6, reactant H is 8, product H is 10, Reactant O is 2, product O is 9.

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The concentration of CO at Equilibrium is 0.0361 M

It is a state of dynamic equilibrium where the ratio of the product and reactant concentrations is constant.

Given ;

Balanced equation ;

Now, let's calculate final concentrations ;

There will react X M of COCl₂

Since, the mole ratio is 1 : 1

Now, Let's find Kc

Kc=  [CO] x [Cl₂] /  [COCl₂]  = 8.33 x 10⁻⁴

Kc = [X] x [X] / 1.6 - X = 8.33 x 10⁻⁴

8.33 x 10⁻⁴  = X² / (1.6 - X)

8.33 x 10⁻⁴ x (1.6 - X) = X²

0.0013328 - 8.33x 10⁻⁴ X = X²

X² + 8.33*10⁻⁴ X  - 0.0013328= 0

X = 0.0361 M = [CO] = [Cl₂]

[COCl₂] = 1.6 - 0.0361 = 1.5639 M

To balance this, we can calculate the Kc

Kc = (0.0361 x 0.0361) / 1.5639 = 0.000833

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The net ionic equation for the reaction between potassium sulfide and magnesium iodide is S2- + Mg2+ -> MgS, as the potassium and iodide ions are spectator ions and do not participate in the reaction.

To determine the net ionic equation for the reaction between potassium sulfide (K2S) and magnesium iodide (MgI2), we first need to identify the ions present in each compound and then determine the products formed when they react.

Potassium sulfide (K2S) dissociates into two potassium ions (K+) and one sulfide ion (S2-):

K2S -> 2K+ + S2-

Magnesium iodide (MgI2) dissociates into one magnesium ion (Mg2+) and two iodide ions (I-):

MgI2 -> Mg2+ + 2I-

Now, we need to determine the possible products when these ions combine. Since potassium (K+) has a +1 charge and iodide (I-) has a -1 charge, they can combine to form potassium iodide (KI):

K+ + I- -> KI

Similarly, magnesium (Mg2+) and sulfide (S2-) can combine to form magnesium sulfide (MgS):

Mg2+ + S2- -> MgS

Now, we can write the complete ionic equation by representing all the ions present before and after the reaction:

2K+ + S2- + Mg2+ + 2I- -> 2KI + MgS

To obtain the net ionic equation, we remove the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the actual reaction. In this case, the spectator ions are the potassium ions (K+) and the iodide ions (I-).

Thus, the net ionic equation for the reaction between potassium sulfide and magnesium iodide is:

S2- + Mg2+ -> MgS

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Answer:

A. The seeds on the ground are going to grow into new trees.

Explanation:

Trees are renewable resources.

Since what we have is an alpha decay, the missing component is 234/90 Th

Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle, which is a helium nucleus consisting of two protons and two neutrons. During alpha decay, the atomic number of the parent nucleus decreases by two, and the mass number decreases by four.

Apha particles can be stopped by a thin layer of material such as paper or skin, and they do not penetrate very far into matter.

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The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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The de Broglie wavelength of the ball bearing is approximately 1.004 x 10^-35 meters.

According to de Broglie's equation, the de Broglie wavelength (λ) of a particle is given by:

λ = h / p

where

h is Planck's constant (6.626 x 10^-34 J s) and

p is the momentum of the particle.

The momentum (p) of the ball bearing can be calculated using the formula:

p = m * v

where

m is the mass of the ball bearing and

v is its velocity.

Substituting the given values, we get:

p = 0.02 kg * 330 m/s = 6.6 kg m/s

Now, we can calculate the de Broglie wavelength (λ) of the ball bearing as follows:

λ = h / p = 6.626 x 10^-34 J s / 6.6 kg m/s = 1.004 x 10^-35 m

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The rainwater sample has a pH of 4.35, indicating that it is acidic. The concentration of \(H_3O^+\) ions in the sample is \(4.47 * 10^{-5} M\), which is higher than in neutral or basic solutions.

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Answer:

option B

Explanation:

The ΔH fusion of a substance is the energy evolved per one mole. Then mass of the substance that evolves 1 KJ of energy is 1 KJ divided by ΔH fusion. Then divide the obtained mass by density in g/ml. Thus option B is correct.

Fusion enthalpy is the heat energy released during the fusion of molecules in a substance. The liquid phase changes to solid phase by fusion. The enthalpy of fusion depends on the bond type and temperature as well as presence of impurities if any.

The heat of fusion, ΔH fusion for a substance is the energy released by the fusion of one mole of that substance. The mass of one mole is expressed in g/mol.

Then, the number of moles  of the substance that release 1 KJ energy is:

1 KJ / ΔH fusion

then, mass = no.of moles × mass

then, volume = mass/density in g/ml

then the expression, becomes

1kJ * 1/ΔHfusion * g/mol x ml/g liquid

Therefore, option B is correct.

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The strand 1 of hydrocarbons is used to produce plastic, hence option D is correct.

Raw resources like natural gas, oil, or plants that have been processed into ethane and propane are used to make plastics. The subsequent "cracking" procedure uses heat to transform ethane and propane into ethylene and propylene. To produce various polymers, these components are mixed.

Propylene is a substance found in large quantities in petroleum. In order to speed up chemical processes, refiners combine heated propylene with a catalyst to create plastic. Propylene molecules start to cluster together like beads on a thread as a result.

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250 L of 5.0% w/v glucose solution can be prepared using 125 g of glucose.

w/v = [ mass of solute (g) / volume of solution (mL) ] × 100

5.0 % w/v = [ 125 g / volume of solution (mL) ] × 100

volume of solution (mL) = [ 125 g / 5.0 % w/v ] x 100

volume of solution (mL) = [ 125 g / (5.0 / 100) ] x 100

volume of solution (mL) = [ 125 g / 0.05 ] x 100

Answer:

desity =mass /volume

27/ 3cube

1g/cm³

The given chemical reaction equation of photosynthesis as shown in the image is balanced.

The term photosynthesis has to do with the process that involves the combination of water and carbon dioxide in order to form glucose and oxygen. This is the only process in the universe that is able to  trap the vast energy from the sun and convert the same to the energy that is stored in biomass.

The organisms that are able to carry out nutrition by this chemistry are said to be producers. The green plants in the various ecosystems are able to effectively carry out this process. The balanced chemicals reaction of this process is shown in the image attached.

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