Representation of chemical reaction using symbols of substances is called ________.
A. chemical equation
B. symbolic equation
C. unbalanced equation
D. both a and b

The specific heat of the metal is 21,695.047 J/g/deg

The water will develop heat as a result of heat being transmitted from the hot metal to the colder water. The metal and the water will both be the same temperature (56C) at the conclusion.

The heat (q) is determined by multiplying the mass (m) by the specific heat (C) and the temperature change (ΔT).

q = mC∆T

For the metal: q = (2.34kg) (C J/g/deg) (129deg - 88deg)

                        q = 301.86- 205.92

                        q = 95.94 C

For the water: q = (15,546g) (4.184 J/g/deg) (88 deg - 56 deg) 

= 65,044.464*88 - 65,044.464*56

= 2081422.848 J

95.94 C = 2081422.848

C = 2081422.848/95.94 = 21,695.047

C = 21,695.047 J/g/deg --> specific heat of the metal

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Answer:

the answer is cobalt and chloride

tt takes 67,200 J of heat to warm 1.20 kg of sand from 30.0 °C to 100.0 °C.

To calculate the amount of heat required to warm up 1.20 kg of sand from 30.0 ∘C to 100.0 ∘C, we need to use the specific heat capacity of sand. The specific heat capacity of sand is typically around 0.8 J/g⋅∘C.

First, we need to convert the mass of sand from kg to grams, which is 1.20 kg x 1000 g/kg = 1200 g.

Next, we can use the formula:

Q = m x c x ΔT

where Q is the amount of heat required, m is the mass of the substance (in grams), c is the specific heat capacity of the substance (in J/g⋅∘C), and ΔT is the change in temperature (in ∘C).

Substituting the values we have:

Q = 1200 g x 0.8 J/g⋅∘C x (100.0 ∘C - 30.0 ∘C)

Q = 1200 g x 0.8 J/g⋅∘C x 70.0 ∘C

Q = 67,200 J

Therefore, it would require 67,200 J of heat to warm up 1.20 kg of sand from 30.0 ∘C to 100.0 ∘C.

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It possible to eat acidic things without changing your blood pH blood can absorbed small amounts of acids or bases without harmful effects.

The body has systems in place to maintain a steady pH, so little pH variations don't hurt the body. Researchers frequently claim that eating more or less acidic or alkaline meals has little to no effect on blood pH levels.

High blood acid levels are typically a symptom of underlying diseases like diabetes or kidney issues. By excreting acids in urine, the kidneys control the blood's pH. Additionally, they generate and control bicarbonate, which raises the pH of the blood. These changes could take hours or days, taking longer than those brought on by breathing.

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Answer:

Its mass number is 15

And this element is nitrogen N

Explanation:

Because mass number = number of proton + number of neutrons

So 7+ 8 = 15

The rate of reaction if it follows a zero-order reaction mechanism is 0.0012 mol⋅L⁻¹⋅s⁻¹.

To determine the rate of reaction for the hydrogenation of ethylene following a zero-order reaction mechanism, you'll need to use the rate constant (k) and the initial concentration of ethylene ([en0]). In a zero-order reaction, the rate is independent of the concentration of the reactant, which means the rate is equal to the rate constant.

In this case, the rate constant (k) is 0.0012 mol⋅L⁻¹⋅s⁻¹. Hence, the rate of reaction is:

Rate = k = 0.0012 mol⋅L⁻¹⋅s⁻¹

So, the rate of reaction for the hydrogenation of ethylene using a nickel catalyst is 0.0012 mol⋅L⁻¹⋅s⁻¹.

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Answer:

1.

A. 3 significant figures

B. 4 significant figures

C. 3 significant figures

D. 2 significant figures

E. 2 significant figures

F. 2 significant figures

Answer:Evaporation

Explanation:

The suns heat speeds the movement of water molecules, until the molecules move fast enough that they jolt out the surface of the water individually. Overtime the water gradually evaporates into water vapor.

Answer:

something with one particle/atom

Explanation:

Answer: C Repeat the experiment and compare the data again.

A.

i had this question and i got it right

Answer:

It's a metaphor. It's comparing Jordan and their emotions to a tornado

Answer:

Sodium ion ( Na+) is known to have no smell at all but however appears salty which is the reason why the compound Sodium Chloride has the same type of taste.

Hydrogen ions ( H+) are known to have no taste which implies it being tasteless. It is also important to note that it has no smell too when perceived (odorless).

Answer:

To determine the limiting reactant and the excess reactant, we need to compare the stoichiometry of the reaction with the amounts of each reactant given.

The balanced chemical equation is:

3 MgCl2 + 2 Na3PO4 -> 6 NaCl + Mg3(PO4)2

Given:

Moles of MgCl2 = 0.75 mol

Moles of Na3PO4 = 0.65 mol

a) To verify the limiting reactant, we need to calculate the moles of Na3PO4 and MgCl2 needed to react completely, based on the stoichiometry of the balanced equation.

From the equation, we can see that:

For every 3 moles of MgCl2, 2 moles of Na3PO4 are required.

Therefore, the moles of Na3PO4 required to react with 0.75 mol of MgCl2 would be:

(0.75 mol MgCl2) x (2 mol Na3PO4 / 3 mol MgCl2) = 0.5 mol Na3PO4

Since we have 0.65 mol of Na3PO4, which is greater than the required amount of 0.5 mol, Na3PO4 is the excess reactant.

b) To find the moles of the excess reactant left over, we subtract the moles of Na3PO4 that reacted from the initial moles:

0.65 mol Na3PO4 - 0.5 mol Na3PO4 = 0.15 mol Na3PO4 (left over)

c) To determine the moles of NaCl produced in the reaction, we need to calculate the moles of the limiting reactant (MgCl2) that reacted. From the balanced equation, we know that:

For every 3 moles of MgCl2, 6 moles of NaCl are produced.

Using the stoichiometry, we can calculate the moles of NaCl produced:

(0.75 mol MgCl2) x (6 mol NaCl / 3 mol MgCl2) = 1.5 mol NaCl

Therefore, 1.5 mol of NaCl will be produced in this reaction.

C) Presence of ribosomes

The correct option is C) Presence of ribosomes.

Ribosomes are normally absent from the cytoplasm of the axon terminal, whereas they are present in the cytoplasm of the axon. Protein synthesis is carried out by ribosomes, and the fact that they are found in the cytoplasm suggests that protein synthesis can also take place in the axon. Protein synthesis is typically not necessary in the axon terminal, as this structure's main job is to release neurotransmitters and promote communication with nearby neurons or target cells. Due to the absence of ribosomes in the axon terminal, protein synthesis differs between the axon and axon terminal.

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--The question is incomplete, the complete question is:

"Identify an important difference between the cytoplasm of the axon and that of the axon terminal. Choose the correct option. A) Protein content of the membrane differs from the soma B) Occurrence of protein synthesis C) Presence of ribosomes D) Large numbers of mitochondria"--

The majority of the energy required for life on Earth is produced and maintained by photosynthesis, which is also substantially responsible for producing and maintaining the oxygen content of the atmosphere. 

6CO₂ + 6H₂O = 6O₂ + C₆H₁₂O₆

6 moles of water are required for 1 mole of glucose.

Therefore, 0.9 x 6 = 5.4 moles of water are needed for every mole of glucose.

5.4 x 18 = 97.2 g

Plants and other living things employ a process called photosynthesis to transform light energy into chemical energy that can then be released through cellular respiration to power the organism's activities. Carbohydrate molecules like sugars and starches, which are created from carbon dioxide and water, contain some of this chemical energy.

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Answer:

product

Explanation:

It is the right answer.

Answer:

Multiply n by M to convert to the mass, m:

m = n × M = (0.09299 mol)/1 × (60.083 g)/(1 mol) = 5.5871 g

Explanation:

Convert from molecules into grams:

5.6×10^22 molecules silicon dioxide (SiO2)

Determine the number of molecules, N_molecules:

N_molecules = 5.6×10^22 molecules

Look up Avogadro's constant, N_A, to find the number of molecules in a mole:

N_A = 6.022×10^23 molecules/mol

Divide N_molecules by N_A to convert to the amount of substance, n:

n = N_molecules/N_A = N_molecules/1 × 1/N_A = (5.6×10^22 molecules)/1 × (1 mol)/(6.022×10^23 molecules) = 0.09299 mol

Calculate the molar mass, M, of SiO_2:

M = 60.083 g/mol

Answer:

Body fluid has electrolytes, they are chemicals that dissolve in water and then produce charged ions.

Electrolytes play an important role in our body and there are many of them.

The main electrolytes include chloride, potassium, calcium, sodium, and magnesium.

For example Sodium ions (Na+)

Function in our body: regulate osmotic pressure and the content of water of our body, transmit nerve signals, contract muscle, etc.

That is one type of ion.

Answer:I’m not sure

Explanation:free trial

Let us take our minds back to the kinetic theory of matter. Recall that the particles that compose matter are in constant random motion and the solids are arranged in a definite pattern while the particles of a gas are in random motion.

As such, the zinc has its atoms in a fixed pattern while the hydrogen atoms are roaming freely in the gaseous state.

Given that;

Amount of the acid = 10.95 g/36.5 g/mol = 0.3 moles

Amount of the zinc = 1g/65 g/mol = 0.015 moles

Given the reaction equation; \(Zn(s) + 2HCl(aq) ------ > ZnCl_{2} (aq) + H_{2}(g)\)

1 mole of Zn reacts with 2 moles of acid

0.015 moles of zinc reacts with x moles of acid

x =0.015 moles * 2 moles / 1 mole

= 0.03 moles

Thus, the zinc is the limiting reactant.

1 moles of the zinc produces 1 mole of the hydrogen

The amount of the hydrogen produced =  0.03 moles * 2 g/mol

= 0.06 moles of hydrogen

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The correct order to rank the activity of the elements Cu, Cd, and Zn is d) Cd > Cu > Zn. The correct answer is d).

Given the following observed reactivity information: Zn + CuBr₂ → Cu + ZnBr₂ → No Reaction, Cu + CdBr₂ → No Reaction. Copper displaces zinc from zinc bromide, while zinc cannot displace copper from copper bromide. Hence, Copper is more reactive than Zinc.

Zinc cannot displace cadmium from cadmium bromide, while copper can displace cadmium from cadmium bromide. Hence, Cadmium is more reactive than Zinc and Copper is more reactive than Cadmium. The correct order to rank the activity of the elements Cu, Cd, and Zn is Cd > Cu > Zn.

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Answer:

\(\Large \boxed{\boxed{\text{$\rm \therefore K_{sp}=0.0104$}}}\)

Explanation:

The following equilibrium reaction is an example of a dissolution reaction:

\(\Large \text{KClO$_{4\,(s)} \leftrightharpoons$ K$^+_{\ \,(aq)}$ + ClO$_4^{\ -}_{(aq)}$}\)

Dissolution is the process in which solutes dissolve in water and form a solution. This can be represented by the equation as seen above, where a solid solute dissolves into its separate ions, in solution with water.

When a salt completely dissolves, the reaction has proceeded completely to the right. However, when a salt is in a saturated state or is insoluble in a solution, the reaction is in equilibrium and follows the equilibrium law.

Consider the following general equilibrium dissolution reaction:

\(\Large \text{aA$_{(s)} \leftrightharpoons$ bB$_{(aq)}$ + cC$_{(aq)}$}\)

Using the equilibrium constant expression, the solubility product constant is thus:

\(\Large \boxed{\text{$\rm K_{sp}=\frac{\left[B\right]^b\left[C\right]^c}{\left[A\right]^a}$} }\)

However, since the solid solute is not dissolved in any solvent, it essentially has no concentration. Thus, we exclude it from the Ksp expression, and we are left with:

\(\Large \boxed{\text{$\rm K_{sp}=\left[B\right]^b\times \left[C\right]^c$} }\)

This is the expression for the solubility product constant.

Now to calculate the Ksp when we are given the solubility (i.e, the concentration) of one of the reagents, we can use stoichiometry (the ratio of reactant to product particles), to calculate the Ksp.

Using the reaction above, stoichiometry = 1 : 1 : 1. If the molar solubility of KClO₄ is 0.102 M, then due to the stoichiometry:

[K⁺] = 0.102

[ClO₄⁻] = 0.102

Hence, plugging these values into our Ksp equation:

\(\Large \text{$\rm K_{sp}=\left[K^+\right]\left[ClO_4^{\ \,-}\right]$}\\ \\\Large \text{$\rm \phantom{K_{sp}}=\left(0.102\right)\left(0.102\right)$}\\ \\\Large \text{$\rm \phantom{K_{sp}}=\left(0.102\right)^2$}\\\\\Large \boxed{\boxed{\text{$\rm \therefore K_{sp}=0.0104$}}}\)

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Answer:

its 90

Explanation:

because you add the mass together

What is forest vegetation?

However, Four case studies, namely Mudumalai, Sholayar, Uppangala, and Kakachi permanent plots in the Western Ghats forests, have had their sampling techniques thoroughly discussed.

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The expansion of forest plants across the continents' surfaces is what caused carbon dioxide levels to decline throughout time.

How does increase in forest vegetation affect the amount of \(CO_{2}\) ?

The expansion of forest plants across the continents' surfaces is what caused carbon dioxide levels to decline throughout time.

Carbon dioxide that would otherwise contribute to global warming is absorbed by trees. Plants use the process of photosynthesis to convert carbon dioxide and water into energy. In this way, trees remove the carbon from the atmosphere that we so sorely need to. Trees help the soil capture and store carbon, in addition to capturing carbon dioxide.

Forests are known to be the best carbon sinks when left untouched, whether it be in the Amazon Rainforest or Western Ghats. In addition to serving as a habitat for a wide variety of creatures, vegetation stores a sizable amount of carbon.

Therefore, Increasing vegetation resulted in the dramatic reduction in concentration of \(CO_{2}\).

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The structure of the 4-ethyl-2-methyl-3-propyl heptanoic acid is shown in the image attached

The arrangement and connectivity of the atoms within a molecule are referred to as the structure of an organic substance. Along with other elements including oxygen, nitrogen, sulfur, and halogens, organic molecules are largely made of carbon atoms bound to hydrogen atoms.

It is crucial to remember that organic compounds can exist in several isomeric forms, where the same chemical formula leads to various structural configurations. The connection of atoms or the spatial arrangement of atoms in three-dimensional space might vary between isomers.

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Answer:

Explanation:

El hielo encierra la primavera antes de espolvorear la sal.

Cuando se rocía sal sobre el hielo, disminuye el punto de fusión del hielo 32 ° F a un poco por debajo de 32 °, por lo tanto, se acumula.

A medida que el hielo se vuelve a congelar, encierra la primavera

The stroke volume in the next few cardiac cycles will be 100 ml if the end-diastolic volume is increased from 135ml to 165m.

The formula for stroke volume is given as;

SV = EDV - ESV

Here SV represents stroke volume, EDV represents end-diastolic volume and ESV represents end-systolic volume.

First, we calculate this person's end-systolic volume as follows;

If the person’s stroke volume was 70ml and his initial diastolic volume was 135 ml, then:

70 = 135 - ESV

70 - 135 = -ESV

-65 = -ESV

ESV = 65ml

Now the stroke volume in the next few cycles if the end-diastolic volume increase to 165 ml can be calculated as follows;

SV = 165 - 65

SV = 100ml

Therefore, the stroke volume in the next few cardiac cycles is calculated to be 100ml.

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\(\frac{(28)(92.2297)+(29)(4.6832)+(30)(3.0872)}{100} \approx \boxed{28.11 \text{ amu}}\)

The average atomic mass in amu of this element using four significant figures would be 28.10 atomic mass units.

It is the sum of the mass of all the protons as well as the neutrons that are present inside the nucleus.

As given in the problem, there are three isotopes of an element, X-28, X-29, and X-30, with relative abundances of 92.2297%, 4.6832%, and 3.0872%, respectively, then the average atomic mass in amu of this element using four significant figures would be

The average  atomic mass of the element X = 0.922297×28 + 0.046832×29 + 0.030872×30

                                                        = 28.10 atomic mass units

Thus, the atomic mass of the element X in the four significant figures would be 28.10 atomic mass unit

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