Calculate the mass of the zinc that reacts with 4.11 g of hydrochloric acid to form 9.1 g of zinc chloride and 3.97 g of hydrogen gas.

Answer:

8740 joules are required to convert 20 grams of ice to liquid water.

Explanation:

The amount of heat required ([tex]Q[/tex]), measured in joules, to convert ice at -50.0 ºC to liquid water at 0.0 ºC is the sum of sensible heat associated with ice and latent heat of fussion. That is:

[tex]Q = m\cdot [c\cdot (T_{f}-T_{o})+L_{f}][/tex] (1)

Where:

[tex]m[/tex] - Mass, measured in grams.

[tex]c[/tex] - Specific heat of ice, measured in joules per gram-degree Celsius.

[tex]T_{o}[/tex], [tex]T_{f}[/tex] - Temperature, measured in degrees Celsius.

[tex]L_{f}[/tex] - Latent heat of fussion, measured in joules per gram.

If we know that [tex]m = 20\,g[/tex], [tex]c = 2.06\,\frac{J}{g\cdot ^{\circ}C}[/tex], [tex]T_{f} = 0\,^{\circ}C[/tex], [tex]T_{o} = -50\,^{\circ}C[/tex] and [tex]L_{f} = 334\,\frac{J}{g }[/tex], then the amount of heat is:

[tex]Q = (20\,g)\cdot \left\{\left(2.06\,\frac{J}{g\cdot ^{\circ}C} \right)\cdot [0\,^{\circ}C-(-50\,^{\circ}C)]+334\,\frac{J}{g} \right\}[/tex]

[tex]Q = 8740\,J[/tex]

8740 joules are required to convert 20 grams of ice to liquid water.

Answer:

Polymerisation is the chemical process of monomers joining together to form polymers, often it takes many thousands of monomers to make a single polymer.

Explanation:

1 mole of carbon contains 6.02*(10^23) atoms of carbon

Answer: a neutral

Explanation: it’s an neutral because it’s all alone and there’s no chemicals

Answer:

In a chemical formula, the elements in a compound are represented by their chemical symbols, and the ratio of different elements is represented by subscripts.

Explanation:

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.

Answer:

C. The molecules move slower

Explanation:

Oxidation half equation; 2Fe^2+ ----> 2Fe^3+ + 6e

Reduction half equation; 3Cu^2+  + 6e ---->3Cu

An oxidation-reduction (redox) reaction is a type of chemical reaction that involves the transfer of electrons between two species. Oxidation refers to the loss of electrons by a substance, while reduction refers to the gain of electrons by a substance.

Redox reactions are important in many chemical and biological processes, such as cellular respiration, photosynthesis, corrosion, and combustion. They can also be used in industrial processes, such as electroplating, battery operation, and chemical synthesis.

Learn more about oxidation:https://brainly.com/question/9496279

#SPJ1

Answer: In the Nitrogen family

Explanation:

Other elements in the family are: phosphorus, arsenic, antimony, and bismuth.

Answer:

5A

Explanation:

Answer:

100 n im just guess

Explanation:

if it helps.

have a good day

hope you stay safe

Answer:

for brass

mass m1 =150g

t1=90°c

specific heat of brass s1=0.380 J/gC.

for water

t2=20°c

mass m2=230g

Specific heat of water s2= 4.18 J/gC,

Explanation:

we have

Q1=Q2

m1s1{t-t1)=m2s2(t2-t)

150×0.380(t-90)=230×4.18(20-t)

57t-5130=961.4×20-961.4t

57t +961.4t=19228+5130

1018.4t=24358

t=24358/1018.4=23.91=24°c is final temperature

Answer: 3 elements

Explanation:

They are

K for Potassium, C for Calcium and O for Oxygen

Answer:

becomes runoff and finds its way back to the ocean

Explanation:

Precipitation refers to rainfall that reaches the earth.

Most of the rainfall that reaches the earth becomes runoff and finds its way back to the ocean.

When the rain falls on earth, some evaporates, some enters into the ground while some runs off into rivers and streams. Almost all of the rain water flows into the oceans or other bodies of water.

Hence, most of the rainfall that reaches the earth becomes runoff and finds its way back to the ocean

Answer:

True

Explanation:

Both work because an element would be pure and compounds can be split into elements. This will work unless the substance isnt chemcially pure, but in this case it is so the answer would be true.

Answer:

Metal is a better conductor than plastic so its going to absorb any cooler temperatures while the plastic stays the same.

Explanation:

Answer:

Sodium (Na) has more protons than carbon (C).

hope that helps!

Answer:

A

Explanation:

Answer:

28atm

Explanation:

Using Gay lussac's law equation as follows:

P1/T1 = P2/T2

Where;

P1 = initial pressure (atm)

T1 = initial temperature (K)

P2 = final pressure (atm)

T2 = final temperature (K)

Based on the information provided in this question;

P1 = 30.0 atm, T1 = 30.0°C, P2 = ?, T2 = 10.0°C

NOTE: Absolute temperature i.e. Kelvin is required for this law

T1 = 30°C + 273K = 303K

T2 = 10°C + 273K = 283K

Using P1/T1 = P2/T2

30/303 = P2/283

Cross multiply

P2 × 303 = 30 × 283

303P2 = 8490

P2 = 8490/303

P2 = 28.02

New pressure of the gas = 28atm

62.1 g Al

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

2.30 mol Al

Step 2: Identify Conversions

[PT] Molar Mass of Al - 26.98 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

62.054 g Al ≈ 62.1 g Al

The net ionic equation is applied mainly in neutralization reactions, double displacement reactions and redox reactions. Therefore,  the net ionic equation is Ag⁺(aq)+CO[tex]_3[/tex]²⁻(aq)  [tex]\rightarrow[/tex]Ag[tex]_2[/tex]CO[tex]_3[/tex](s).

The net ionic equation represents a chemical equation of a reaction that give an idea of species that are really participating in the reaction. We can write net ionic equations for those electrolyte which are strong in water.

The balanced net ionic equation is

2AgF(aq)+Na[tex]_2[/tex]CO[tex]_3[/tex](aq)[tex]\rightarrow[/tex]Ag[tex]_2[/tex]CO[tex]_3[/tex](s)+2NaF(aq)

Ag⁺(aq) +F⁻(aq) +Na⁺(aq) +CO[tex]_3[/tex]²⁻(aq) [tex]\rightarrow[/tex]Ag[tex]_2[/tex]CO[tex]_3[/tex](s)+Na⁺(aq) +F⁻(aq)

Ag⁺(aq)+CO[tex]_3[/tex]²⁻(aq)  [tex]\rightarrow[/tex]Ag[tex]_2[/tex]CO[tex]_3[/tex](s)

The net ionic equation cancels out ions that appear on both sides of the reaction arrow because they essentially don't participate in the reaction of interest.

Therefore,  the net ionic equation is Ag⁺(aq)+CO[tex]_3[/tex]²⁻(aq)  [tex]\rightarrow[/tex]Ag[tex]_2[/tex]CO[tex]_3[/tex](s).

To learn more about net ionic equation, here:

https://brainly.com/question/13161506

#SPJ2

Answer: The empirical formula is [tex]MgSO_3[/tex]

Explanation:

Mass of Mg= 46.6 g

Mass of S= 61.4 g

Mass of O = 92.0 g

Step 1 : convert given masses into moles.

Moles of Mg =[tex]\frac{\text{ given mass of Mg}}{\text{ molar mass of Mg}}= \frac{46.6g}{24g/mole}=1.942moles[/tex]

Moles of S =[tex]\frac{\text{ given mass of S}}{\text{ molar mass of S}}= \frac{61.4g}{32g/mole}=1.918moles[/tex]

Moles of O =[tex]\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{92.0g}{16g/mole}=5.75moles[/tex]

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For Mg = [tex]\frac{1.942}{1.918}=[/tex]

For S= [tex]\frac{1.918}{1.918}=1[/tex]

For O =[tex]\frac{5.75}{1.918}=3[/tex]

The ratio of Mg: S: O = 1: 1: 3

Hence the empirical formula is [tex]MgSO_3[/tex]

Answer:

Explanation:

There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.

Answer:

Diamond, graphite and fullerness

Explanation:

Diamond is clear and transparent but graphite is black and opaque

Answer:

water pulling a compound apart and then surrounding the broken pieces/ions (this is what dissolving is)

Explanation:

As we know, water is a polar solvent. What this means is that water can effectively interact with ions in an ionic substance owing to its large dipole moment.

Now, when an ionic substance is dissolved in water, the positive end in water pulls hard on the negative ion of the ionic substance while the negative end in water pulls hard on the positive ion of the ionic substance.

The ionic substance is eventually pulled apart and surrounded by water molecules. This is how an ionic substance is dissolved in water.

Explanation:

Ionic Compounds: These are compounds that contain ionic bonds. Generally, they are compounds that consists of a metal bonded to a nonmetal. Examples includes;

- CaO

- AgCl

- KCl

- CaI₂

- AgNO₃

- KClO₃

Molecules: They typically contain the covalent bonds. Generally, they are non metals bonded to each other.

Examples Includes;

- H₂

- C₂H₄

- N₂

- NH₃

- Cl₂

- I₂

Answer:

It would be 151.832775 because one mole is 44.0095*3.45 i hope this helps!

Explanation:

Answer:According to the Darwin’s theory “ the survival of the fittest” , any organism would survive through the process of natural selection by  adapting itself  to the changing environment in order to become the fittest among all of its native species.  

Thus, in order to survive even after some major environmental changes, an organism is required to adapt to the new conditions.  

Hence, option 2 is the correct answer which talks about adaptation as per the changing environmental condition

Explanation:

Answer:

uhhhhh ik there are about 45,000 to 69,000 left in the wild, but a healthey number in one exhibit say, at a zoo or sum would be likeee 7 t0 8

Explanation:

if this wasnt what u were asking, srry lol, u werent specific