Please help



Boiling off a pot of water


A pot containing 500 g of water is brought to a boil.


The latent heat of vaporization is for water HΔv =2260 kJ/kg



How much heat will it take to completely boil the water (turn it all to steam).



Use the equation q = mHΔv

Answer:

plastic

Explanation:

plastic doesn't conduct electricity

Answer:

Respiration

Explanation:

Respiration is the system of how an animal breathes

Answer:

meter. 1.5×10^-6

Litter. 2×10^-5

Kilo Gram. 1.7

Kilo Gram. 3.4 ×10^-3

I hope you understood that and if you don't understand write in comments

Answer:Both protons and neutrons have a mass of 1

Explanation:

Answer:

Protons and neutrons are both subatomic particles, which means they are both components of atoms. Protons and neutrons are found in the nucleus of an atom. They both have mass of 1 amu.

Explanation:

Yes, Cayden will succeed in making curd. We would follow the same procedure to make the curd.

When a spoonful of old curd is added to warm milk, the bacteria present in the curd starts to multiply in the milk. These bacteria convert the lactose (milk sugar) present in the milk into lactic acid, which causes the milk to thicken and form curd. The process of curd formation is called curdling.

When the curdled milk is kept in a fridge, the low temperature inhibits the growth of bacteria, and the curd sets. This is because the lactic acid formed by bacteria during the curdling process makes the milk protein molecules coagulate and form a solid mass.

Therefore, Cayden's procedure of adding a spoonful of old curd to warm milk and keeping it in the fridge is an effective way to make curd.

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Answer:

La clorofila capta la energía luminosa del sol. (verdadero) La fotosíntesis degrada las sustancias orgánicas que nesecitas las células(falso)

Explanation:

La clorofila es la encargada de dar el pigmento de color verde en las plantas y la que transforma la energia luminica en energia quimica, es por eso que es verdadera.

La fotosintesis NO degrada las sustancias organicas, sino que transforma un sustrato inorganico en una fuente energetica organica para las plantas.

Esto se debe por que las plantas o vegetales son autonomas, es decir que se autoabastecen energeticamente sin necesidad de ingerir alimentos como en el caso de los mamiferos.

Answer: B

Explanation:

protons are positive,

electrons are negative,

and neutrons are neutral.

the amount of electrons to protons is always the same in a balanced atom.

electrons can be removed creating "ions" which is simply an unbalanced atom. removing protons would result in a different type of atom or element.

Answer:

Neutron - neutral

Explanation:

This was the correct answer for the test I just took.

The strength of acids is influenced by the molecular structure of an acid by polarization of H-A bond and electronic effects like inductive, resonance .

The more the acidic strength, the more is the ability of an acid to donate H+ ions. So, the molecular structure of an acid is very important in determining the strength of the acid. Generally, if the size of an acid molecule increases, the acidic strength increase. If the size of the acid molecule decreases, the acidic strength decreases. There might be few exceptions. In conclusion, the strength of acids is greatly influenced by the molecular structure of an acid.

The following factors affect the acidic strength of acids :

In general, the key factors that determine the strength of an acid are the presence of polar bonds, the stability of the resulting conjugate base, and the ability to release hydrogen ions (protons).

Thus, the strength of acids is influenced by the molecular structure of an acid by polarization of H-A bond and electronic effects like inductive, resonance .

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The consumption function based on the information in Table 5 is as follows: C = 2577 + 0.75Y. It is given, Consumption function, C = Ca + cY Where, Ca is autonomous consumption expenditure, c is marginal propensity to consume (MPC)Y is disposable income

The consumption function based on the information in Table 5 is: Table 5Income(¥ billions)

Consumption(¥ billions)100025020007526000102772750120301.

Write the consumption function in the given format. Ca = Autonomous consumption expenditure c = MPCY = Disposable Income Calculation:

We can obtain the value of Ca as follows: C = Ca + cY

Put the given values, C = 2577Ca + 0.75YAt Y = 1000 billion, C = 2577(1) + 0.75(1000)

= 8327 billion

At Y = 2000 billion, C = 2577(1) + 0.75(2000)

= 13277 billion

At Y = 3000 billion, C = 2577(1) + 0.75(3000)

= 18277 billion

At Y = 4000 billion, C = 2577(1) + 0.75(4000)

= 23277 billion

At Y = 5000 billion, C = 2577(1) + 0.75(5000)

= 28277 billion

Therefore, the consumption function based on the information in Table 5 is as follows: C = 2577 + 0.75Y.

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347.69 grams of Fe are produced from 12.57 grams of\(H_2.\)

The chemical reaction between Fe and H2 is\(:Fe + H_2 -> FeH_2\)

To find out how many grams of Fe are produced from 12.57 grams of H2, we need to use stoichiometry. To do this, we need to first balance the equation. It's already balanced:\(Fe + H_2 -> FeH_2\) .Now, we need to convert 12.57 grams of H2 to moles.

To do this, we need to use the molar mass of \(H_2\), which is 2.02 g/mol:12.57 g.

\(H_2 * (1 mol H_2/2.02 g H_2) = 6.22 mol H_2\)

Now that we know we have 6.22 moles of \(H_2\), we need to figure out how many moles of Fe are needed to react with this amount of \(H_2\).

We can see from the balanced equation that 1 mole of Fe reacts with 1 mole of H2, so we need 6.22 moles of Fe:6.22 mol FeNow that we know how many moles of Fe we need, we can convert that to grams of Fe using the molar mass of Fe, which is 55.85 g/mol:

6.22 mol Fe × (55.85 g Fe/1 mol Fe)

= 347.69 g Fe.

Therefore, 347.69 grams of Fe are produced from 12.57 grams of \(H_2.\)

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The reaction is in order relative to I in the number 1. when the oxidation of iodide ions by arsenic acid in acidic aqueous solution occurs according to the stoichiometry.

In each of the reactants, the rate law displays the sequence in which a certain reaction occurs. The rate rule is Rate = k [H3AsO4] [I] [H3O+], and it applies to the reaction H3AsO4 + 3 I + 2 H3O+ ------> H3AsO3 + I3 I + H2O.

The reaction is first order with regard to each of the reactants, according to the interpretation of this. Consequently, the reaction is of the order of 1, relative to I.

The pace at which a chemical reaction occurs is known as the reaction rate or rate of reaction, and it is proportional to both the rise in product concentration per unit time and the fall in reactant concentration per unit time. Variable reaction times

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When the stoichiometric oxidation of iodide ions by arsenic acid in an acidic aqueous solution occurs, the reaction is in order relative to I in number 1.

The rate law illustrates the order in which various reactions take place in each reactant. The reaction H3AsO4 + 3 I + 2 H3O+ follows the rate rule Rate = k [H3AsO4] [I] [H3O+]. H3AsO3 + I3 I + H2O is the equation.

The interpretation of this is that the reaction is first order with respect to each of the reactants. As a result, in relation to I, the reaction is of order 1.

The reaction rate, also known as the rate of reaction, is the rate at which a chemical reaction takes place. It is proportional to both the increase in product concentration per unit of time and the decrease in reactant concentration per unit of time. different reaction times.

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Answer:

i think it MIGHT be D

Explanation:

Answer:

b

Explanation:

edge :)

The ideal gas law, which relates the pressure, volume, temperature, and number of moles of an ideal gas, can be applied to real-world situations. By considering a specific scenario and applying the ideal gas law, we can analyze the behavior of gases and make predictions about their properties.

Let's consider a situation where a scuba diver is exploring underwater at a depth of 30 meters. We can apply the ideal gas law, specifically the form known as Boyle's law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

Question: How does the pressure of the gas in the scuba tank change as the diver descends to a depth of 30 meters, assuming the temperature remains constant?

To answer this question, we can use the ideal gas law equation PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature. By keeping the temperature constant, we can observe the relationship between pressure and volume as the diver descends and calculate the change in pressure based on the change in volume.

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Given that we want to prepare a 10% solution of sodium hydroxide in 200 mL, we need to calculate the mass of sodium hydroxide required to make this solution.

We can use the following formula to calculate the mass of solute required to make a given volume and concentration of solution:

The density of solid NaOH is 2.13 g/mL. So, the density of sodium hydroxide solution is:

Sodium hydroxide, also known as lye and caustic soda or caustic soda, is an inorganic compound with the chemical formula NaOH. This compound is an ionic compound in the form of a white solid composed of the sodium cation Na⁺ and the hydroxide anion OH⁻. Sodium hydroxide is a building block that can also be found in detergents and oil stain removers. We use it to make products clean better by influencing the formula molecules, so they work better together.

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The base in an anticodon that will pair with the base adenine (A) in a codon is uracil (U).

When there is DNA replication, the genetic code from the DNA molecule is transferred to the messenger RNA molecule. The messenger RNA molecule contains codons, which are three bases long sequences. These sequences are complementary to the three-base long anticodons found in transfer RNA.The base pairing is done according to the complementary base pairing rule: cytosine (C) pairs with guanine (G), and adenine (A) pairs with thymine (T) in DNA or uracil (U) in RNA. In the process of protein synthesis, the anticodon found in transfer RNA pairs with the codon found in messenger RNA. Since adenine pairs with uracil in RNA, the base in an anticodon that will pair with the base adenine (A) in a codon is uracil (U).Therefore, option C, Uracil (U), is the correct answer.

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According to Charle's law, the volume of the given mass of a gas is directly proportional to its absolute temperature provided that the pressure is constant. Mathemically;

where;

V1 and V2 are the initial and final volume of the gas

T1 and T2 are the initial and final temperatures of the gas (in Kelvin)

Given the following parameters:

Substitute the given parameters into the formula;

Therefore the volume of the gas at 20°C is approximately 97.67cm³

intestinal flora

A modest level of ethanol enters the human circulation naturally from intestinal flora, equivalent to a fraction of a drink per day.

Intestinal microflora primarily serves two purposes:

The immune system's development and balance depend heavily on intestinal microorganisms.

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Answer:

N2 + O2 → 2NO is an oxidation-reduction reaction.

Explanation:

An oxidation-reduction reaction (also know as Redox reaction) is a type of chemical reaction that involves a transfer of electrons between two species. It occurs when the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.

We will consider the equations one after the other.

Oxidation numbers of the individual element on the reactant side:

KOH : K = +1, O = -2, H = +1

HNO3 : H = +1, N = +5, O = -2

Oxidation numbers of the individual element on the product side:

H2O: H = +1, O = -2

KNO3: K = +1, N = +5, O = -2

There is no change in the oxidation numbers, hence, it is not an oxidation-reduction reaction.

Oxidation numbers of the individual element on the reactant side:

CaCl2 : Ca = +2, Cl = -1

Na2SO4: Na = +1, S = +6, O = -2

Oxidation numbers of the individual element on the product side:

CaSO4: Ca = +2, S = +6, O = -2

NaCl: Na = +1, Cl = -1

There is no change in the oxidation numbers, hence, it is not an oxidation-reduction reaction.

Oxidation numbers of the individual element on the reactant side:

AgNO3: Ag = +1, N = +5, O = -2

NaCl: Na = +1, Cl = -1

Oxidation numbers of the individual element on the product side:

AgCl: Ag = +1, Cl = -1

NaNO3: Na: +1, N = +5, O = -2

There is no change in the oxidation numbers, hence, it is not an oxidation-reduction reaction.

Oxidation numbers of the individual element on the reactant side:

Al2(SO4)3: Al =+3, S = +6, O = -2

KOH: K = +1, O = -2, H = +1

Oxidation numbers of the individual element on the product side:

Al(OH)3: Al =+3, O = -2, H = +1

K2SO4: K = +1, S = +6, O = -2

There is no change in the oxidation numbers, hence, it is not an oxidation-reduction reaction.

Oxidation numbers of the individual element on the reactant side:

N2: N = 0

O2: O = 0

Oxidation numbers of the individual element on the product side:

NO: N = +2, O = -2

There are changes in the oxidation numbers, hence, it is an oxidation-reduction reaction.

The following is an oxidation-reduction reaction - N2 + O2 → 2NO

Oxidation numbers represent the potential charge of an atom in its ionic state. If the oxidation number decreases in a reaction, it is reduced. If an atom's oxidation number increases, it is oxidized.

= > Oxidation state of N in the reactant is 0

=> Oxidation state of N in the product is +2

So, N is oxidized

=> Oxidation state of O in the reactant is 0

=> Oxidation state of O in the product is -2

So, O is reduced

Thus, the following is an oxidation-reduction reaction - N2 + O2 → 2NO

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Answer:

Examples of calcium channel blockers include:

Amlodipine (Norvasc)

Diltiazem (Cardizem, Tiazac, others)

Felodipine.

Isradipine.

Nicardipine.

Nifedipine (Procardia)

Nisoldipine (Sular)

Verapamil (Calan SR, Verelan)

The volume of 0.50M BaCl2 solution needed to react with the Ba2+ ions is 0.44 L (440 mL) of 0.50M BaCl2 solution.

To determine the amount of 0.50M BaCl2 solution needed to completely precipitate Ba2+ in 1.0L of 0.15 molal Al2(SO4)3 solution, we need to consider the stoichiometry of the reaction.

From the balanced equation:
BaCl2(aq) + Al2(SO4)3(aq) -> BaSO4(s) + 2AlCl3(aq)

We can see that one mole of BaCl2 reacts with one mole of BaSO4. Since BaCl2 is the limiting reactant, we need to calculate the number of moles of Ba2+ in the Al2(SO4)3 solution.

0.15 molal solution means 0.15 moles of Al2(SO4)3 dissolved in 1 kg of solvent (water). The molar mass of Al2(SO4)3 is 342 g/mol, so we have:

0.15 moles x 342 g/mol = 51.3 g Al2(SO4)3 in 1 kg of solvent

Now, we need to convert this mass of Al2(SO4)3 to moles of Ba2+ ions. Since the molar mass of BaSO4 is 233.4 g/mol and it has a 1:1 stoichiometry with Ba2+, we have:

51.3 g / 233.4 g/mol = 0.22 moles of Ba2+ ions

Finally, we can calculate the volume of 0.50M BaCl2 solution needed to react with the Ba2+ ions:

0.22 moles / 0.50 mol/L = 0.44 L (440 mL) of 0.50M BaCl2 solution.

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Answer:

8.72×10^5

Explanation:

Answered it in the comments! ^^

Answer:

Pb(NO3)2+ 2Kl →PbI2 + 2KNO3

Mg + 2HCl → MgCl2 + H2

4H2O → 4H^+ + 4OH^-

2Mg + O2 → 2MgO

Explanation:

This question has to do with the balancing of chemical reaction equations. The general rule for balancing chemical reaction equation is that the number of atoms of each element on the left hand side of the reaction equation must be equal to the number of atoms of the same element on the right hand side of the reaction equation.

This principle was followed in balancing each reaction equation above. For instance, in the burning of magnesium, there are two atoms of both magnesium and oxygen on either side of the reaction equation.

The example of a reaction to which Markovnikov's rule applies is: CH₂=CH-CH₂-CH₃ + HBr → CH₂Br-CH₂-CH₂-CH₃

In this reaction, the hydrogen atom from HBr adds to the carbon atom with the fewer alkyl substituents (less substituted carbon), while the bromine atom adds to the carbon atom with more alkyl substituents (more substituted carbon). This follows Markovnikov's rule, which states that in the addition of a protic acid (such as HBr) to an asymmetrically substituted alkene, the hydrogen atom adds to the less substituted carbon and the other atom adds to the more substituted carbon.

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Answer:

Blank 1: 1

Blank 2: 1

Blank 3: 2

Explanation:

I think the question is like this __Na2O +___H2O =___NaOH

I used "á" this word as equal sign. Is there any wrong with that?

Answer:

I think this is the right answer, I researched this. I am not sure if this is the right answer.

Lava flows rarely kill people because they move slowly enough for people to get out of their way. If magma is thick and sticky, gases cannot escape easily. Pressure builds up until the gases escape violently and explode. ... Explosive volcanic eruptions can be dangerous and deadly.

Explanation:

To calculate the amount of energy transferred to the filament bulb, we can use the power, voltage, and time involved in the circuit. The given information states that the bulb is labeled as '2.5 V, 1.25 W'.

To start, we can use the formula P = IV, where P represents the power, I represents the current, and V represents the voltage. Since the resistance of the bulb is not provided, we cannot directly use the formula P = V² / R. However, we can derive the value of current using I = V / R, where R is the resistance.

By substituting I = V / R into the equation P = IV, we obtain P = V² / R. Now, we have the power value, which is 1.25 W. The bulb is connected to a 2.5 V battery, so we can use P = IV to find the current, I. Substituting P = 1.25 W and V = 2.5 V into the equation, we get I = P / V = 1.25 / 2.5 = 0.5 A.

Now that we know the current flowing through the bulb is 0.5 A, we can calculate the energy transferred using the formula E = Pt, where E represents energy, P represents power, and t represents time. Given that the bulb is connected for 1 minute (60 seconds), we can calculate E = Pt = 1.25 W × 60 s = 75 J (Joules).

Therefore, the amount of energy transferred to the filament bulb when it is connected to a 2.5 V battery for one minute is 75 Joules.

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Answer:

13.18

Explanation:

We'll begin by calculating the hydrogen ion concentration, [H⁺] in the solution. This can be obtained as follow:

HCl (aq) —> H⁺(aq) + Cl¯(aq)

From the balanced equation above,

1 mole of HCl dissociate to produce 1 mole of H⁺.

Therefore, 0.15 M HCl will also dissociate to produce 0.15 M H⁺.

Thus, the concentration of the hydrogen ion, [H⁺] in the solution is 0.15 M.

Next, we shall determine the pH of the solution. This can be obtained as follow:

Concentration of the hydrogen ion, [H⁺] = 0.15 M.

pH =?

pH = – Log[H⁺]

pH = – Log 0.15

pH = 0.82

Finally, we shall determine the pOH of the solution. This can be obtained as follow:

pH = 0.82

pOH =?

pH + pOH = 14

0.82 + pOH = 14

Collect like terms

pOH = 14 – 0.82

pOH = 13.18

Therefore, the pOH of the solution is 13.18

The pOH of the solution is 13.18 when a solution of 0.15 M HCl (aq) is present.

The potential of hydrogen; a measure of the acidity or alkalinity of a solution equal to the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimetre of solution.

Concentration of the hydrogen ion, [H⁺] = 0.15 M.

pH =?

pH = – Log[H⁺]

pH = – Log 0.15

pH = 0.82

Finally, we shall determine the pOH of the solution. This can be obtained as follow:

pH = 0.82

pOH =?

pH + pOH = 14

0.82 + pOH = 14

pOH = 14 – 0.82

pOH = 13.18

Therefore, the pOH of the solution is 13.18

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Answer:

food

Explanation:

If you have 9 moles of CaCl₂ and all the  Na₃PO₄i needed 18 moles of NaCl

In the chemical reaction here

CaCl₂ +  Na₃PO₄ → Ca₃(PO₄)₂ + NaCl if we balance this chemical reaction then

3CaCl₂ +  2Na₃PO₄ → Ca₃(PO₄)₂ + 6NaCl then Ca=1×3=3

,Cl=2×3=6,

Na=3,PO₄=1,

all this are in reactant Ca=3, Cl=1, Na=1, PO₄=2 all this are in product so NaCl produce 18 moles.

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