Examine the fossil. List the parts of the animal that you recognize. What kind of animal do you think this was?

The balanced equation for the reaction of solid magnesium and silver nitrate solution is: `Mg(s) + 2AgNO₃(aq) → Mg(NO₃)₂(aq) + 2Ag(s)`.

This equation shows that one atom of magnesium reacts with two molecules of silver nitrate to produce one molecule of magnesium nitrate and two atoms of solid silver. The coefficients in the equation are balanced to ensure that the same number of atoms of each element are present on both sides of the equation.

In this reaction, magnesium is a more reactive metal than silver, so it displaces the silver from the silver nitrate solution. This is an example of a single replacement reaction, in which one element replaces another in a compound.

Overall, this reaction is exothermic, meaning that it releases heat energy as it occurs. The balanced equation allows us to predict the amount of each reactant and product that will be present in the reaction, as well as the energy changes that will occur.

To know more about exothermic click on below link:

https://brainly.com/question/4345448#

#SPJ11

A white powdery chemical sedimentary rock that does not react to hydrochloric acid could be chalk or gypsum.

Chalk is a soft, porous form of limestone composed primarily of the mineral calcite (calcium carbonate).

It is commonly used for writing on blackboards or as a dietary supplement. Gypsum, on the other hand, is composed of calcium sulfate dihydrate and is often used in construction materials such as drywall.

When hydrochloric acid is applied to gypsum, there is no significant effervescence or bubbling, indicating the absence of a chemical reaction.

This distinctive property allows geologists and mineralogists to identify gypsum in various geological formations and helps differentiate it from other minerals that may react with acid.

Both chalk and gypsum are relatively soft and can be easily scratched with a fingernail. They do not react with hydrochloric acid, as their main constituent minerals are not soluble in acid.

know more about hydrochloric acid here

https://brainly.com/question/24784580#

#SPJ11

Answer:

Explanation:

Warm lake vapor pressure is higher than cold lake vapor pressure because it evaporates more quickly. In other words, as the temperature of warm water increases, the kinetic energy of the warm water molecule also increases. As the kinetic energy of the warm water molecule increases, the number of molecules conversion into a vapor also increases, thereby increasing the vapor pressure of warm water.

Answer:

B.

Warm water evaporates more quickly.

Explanation:

i got it right on edmentum!!

increasing the temperature decreases the value of equilibrium constant for the forward reaction is endothermic

Answer:

Increasing the temperature decreases the value of the equilibrium constant. Where the forward reaction is endothermic, increasing the temperature increases the value of the equilibrium constant

Explanation:

The given molecule is

H3C - C ≡ C - CH3

The numbering order is shown below:

H3C - C ≡ C - CH3

    1     2     3     4

So, the alkyne group is in the second position.

The carbon chain has four carbons.

Hence, the IUPAC name of the given compound is:

2-butyne.

Answer:

\(\boxed {\boxed {\sf molarity \approx 0.722 \ M \ HCl}}\)

Explanation:

Molarity is the concentration measurement equal to moles per liter.

\(molarity=\frac{moles}{liters}\)

We have 26.0 grams of HCl and 1.00 liters of water. We must convert grams of HCl to moles.

To convert from grams to moles, the molar mass is used. Usually we find these values on the Periodic Table, but they are already provided. The molar mass of hydrochloric acid is 36.0 grams per mole. Use this number as a ratio.

\(\frac {36.0 \ g \ HCl}{ 1 \ mol \ HCl}\)

Multiply by the given number of grams: 26.0

\(26.0 \ g \ HCl *\frac {36.0 \ g \ HCl}{ 1 \ mol \ HCl}\)

Flip the ratio so the grams of hydrochloric acid cancel.

\(26.0 \ g \ HCl *\frac {1 \ mol \ HCl}{ 36.0 \ g \ HCl}\)

\(26.0 *\frac {1 \ mol \ HCl}{ 36.0 }\)

\(\frac {26.0}{ 36.0 } \ mol \ HCl = 0.72222222222 \ mol \ HCl\)

Now we know the moles and liters.

Substitute these values into the molarity formula.

\(molarity = \frac {0.72222222222 \ mol \ HCl}{1.00 \ L }\)

\(molarity = 0.72222222222 \ mol \ HCl/L\)

The original measurements of grams and liters have 3 significant figures, so our answer must have the same. For the number we calculated, that is the thousandth place.

The 2 tells us to leave the 2 in the thousandth place.

\(molarity \approx 0.722 \ mol \ HCl/ L\)

1 mole per liter is equal to 1 molar, or M. Change the units.

\(molarity \approx 0.722 \ M \ HCl\)

The molarity of this solution is approximately 0.722 M HCl

Answer:

yes your right its is 4

Explanation:

Answer:

I think B is the right answer.

hope this answer will help you

To find the number of nitrate ions in 24.4 grams of Ca(NO3)2, first determine the moles of Ca(NO3)2, then calculate the moles of nitrate ions, and finally convert moles to a number of ions.

1. Calculate moles of Ca(NO3)2:
Molar mass of Ca(NO3)2 = 40.08 (Ca) + 2*(14.01 (N) + 3*16.00 (O)) = 164.10 g/mol
Moles of Ca(NO3)2 = 24.4 g / 164.10 g/mol = 0.1487 moles

2. Calculate moles of nitrate ions (NO3-):
Each molecule of Ca(NO3)2 contains 2 nitrate ions, so:
Moles of NO3- = 0.1487 moles Ca(NO3)2 * 2 = 0.2974 moles

3. Convert moles of nitrate ions to a number of ions:
Number of ions = 0.2974 moles * 6.022 x 10^23 ions/mol (Avogadro's number)
Number of ions ≈ 1.79 x 10^23 nitrate ions

So, there are approximately 1.79 x 10^23 nitrate ions in 24.4 grams of Ca(NO3)2.

Learn more about moles here:

https://brainly.com/question/30885025

#SPJ11

The radius of an atom of a chemical element is a measure of the atom's size. The meaning of it is said to be the typical distance, which is from the center of the nucleus to the boundary of the atom, which is surrounding the electrons.

Explanation :

To arrange the following in order of increasing radius: O2-, F-, Ne, Rb, and Br-, follow these steps:

1. Determine the number of protons and electrons for each species.
2. Compare their positions on the periodic table.

Here's a breakdown of the species with their protons and electrons:
- O2-: 8 protons, 10 electrons
- F-: 9 protons, 10 electrons
- Ne: 10 protons, 10 electrons
- Rb: 37 protons, 37 electrons
- Br-: 35 protons, 36 electrons

Now, let's compare their positions on the periodic table:
- O2-, F-, and Ne are all in the same period (row), so we'll compare their atomic numbers (protons) to determine their size. As we move across a period from left to right, the atomic radius decreases, so the order will be O2- > F- > Ne.
- Rb and Br- are in the same group (column). Going down a group, the atomic radius increases, so Rb > Br-.

Finally, we can combine these orders to get the overall order of increasing radius: O2- < F- < Ne < Br- < Rb.

To know more about the radius https://brainly.com/question/13449316

#SPJ11

Answer:

it takes about an hour

Explanation:

On average, it takes about an hour for a person to metabolize around 14 grams of pure ethanol—the amount of alcohol contained in one standard drink—which amounts to roughly 12 ounces of 5% ABV beer, 5 ounces of wine, or 1.5 ounces of 80 proof liquor.

Several factors influence the rate at which alcohol is absorbed into the bloodstream. For example, food in the stomach slows gastric emptying and alcohol absorption.

Answer:                                                                                                                    So the burning of paper is considered as a chemical change as the paper after burning changes into ashes and fumes of gases evolve.

Explanation:

There are approximately 1.998 x 10^23 copper atoms in a 79 g sample of Monel.

Monel is an alloy of nickel and copper that contains 28% copper. This means that 100 g of the alloy contains 28 g of copper. To find the amount of copper in a 79 g sample of Monel, we can set up a proportion:

\(\dfrac{28\text{ g Cu}}{100\ g} = \dfrac{x\text{ g Cu}}{79\ g}\)

Cross-multiplying, we get:

28 g Cu * 79 g = 100 g * x g Cu

Simplifying

x g Cu = (28 g Cu * 79 g) / 100 g

x g Cu = 22.12 g Cu

To find the number of copper atoms in this amount of copper, we can use Avogadro's number, which tells us the number of atoms in a mole of a substance:

1 mole Cu = 63.55 g Cu contains 6.022 x 10^23 atoms of Cu

Therefore, the number of copper atoms in 22.12 g of copper is:

(22.12 g Cu) / (63.55 g Cu/mol) * (6.022 x 10^23 atoms Cu/mol) = 1.998 x 10^23 atoms of Cu

To know more about alloy, here

brainly.com/question/18404834

#SPJ4

The longer one goes without drinking water, the more water is reinforcing (and similar liquids). This serves as an example of the reinforcer effectiveness of deprivation.

A liquid is a form of matter that has unique characteristics that make it more rigid than a gas but less stiff than a solid. Like a solid, a liquid can flow and lacks a fixed shape. On the other hand, liquids adopt the shape of the containers they are maintained in.. A liquid is just a fluid. The freedom of movement of molecules in a liquid is far larger than that of a solid. A liquid can flow whereas a solid can't because the forces that hold the molecules together in a solid are only momentary in a liquid.

The two most visible physical properties of a liquid are its ability to retain volume and conform to a shape of its container. When a liquid substance was poured into a container, the liquid condition causes the substance to conform to a shape of a container and stay inside the container.

To know more about Liquid visit:

https://brainly.com/question/20922015

#SPJ4

The balanced nuclear equations for the following:(c) Alpha decay of ²¹²₈₃Bi is ^22688Ra → ^22286Rn + ^42He

Alpha decay usually occurs in heavy nuclei such as uranium or plutonium, and therefore is a major part of the radioactive fallout from a nuclear explosion.

Alpha decay occurs most often in massive nuclei that have too large a proton to neutron ratio. An alpha particle, with its two protons and two neutrons, is a very stable configuration of particles.

Learn more about alpha decay here:

brainly.com/question/1898040

#SPJ4

Paracelsus, a sixteenth-century alchemist, and healer, adopted the slogan "the patients are your textbook, the sickbed is your study." This view is not consistent with using the scientific method.

The scientific method relies on systematic observation, experimentation, and hypothesis testing to gather evidence and draw conclusions.

Paracelsus' approach, on the other hand, seems to prioritize learning from individual patients and their experiences rather than following a systematic and evidence-based approach.

While his approach may have had value in certain contexts, it does not align with the principles of the scientific method.

So,  this view is not consistent with using the scientific method.

Read more about Systematic observations.

https://brainly.com/question/14070509

#SPJ11

The age of a skeleton can be determined by measuring the amount of carbon-14 present in the remains. Carbon-14 is a radioactive isotope of carbon that undergoes decay over time. In this case, the skeleton has lost 19% of its carbon-14.
The decay rate, k, of carbon-14 is given as 0.01205% per year.

This means that each year, the amount of carbon-14 in the skeleton decreases by 0.01205% of the remaining amount.
To find the age of the skeleton, we can use the formula for exponential decay: N(t) = N0 * e^(-kt). Since we know that the skeleton has lost 19% of its carbon-14, the remaining amount is 100% - 19% = 81% of the initial amount. Therefore, N(t) = 0.81 * N0. Substituting these values into the formula, we have: 0.81 * N0 = N0 * e^(-0.01205t). Dividing both sides by N0, we get: 0.81 = e^(-0.01205t)

To solve for t, we take the natural logarithm (ln) of both sides: ln(0.81) = -0.01205t. Now we can solve for t: t = ln(0.81) / -0.01205. Using a calculator, we find that t is approximately 137.51 years. Therefore, the skeleton is estimated to be around 137.51 years old based on the 19% loss of carbon-14 and the given decay rate.

To know more about skeleton visit:

brainly.com/question/32952961

#SPJ11

A ceiling level is a level that is not to be exceeded at any time.

A ceiling level refers to the maximum concentration of a substance that should never be surpassed in the given environment, such as a workplace or laboratory, to ensure safety and prevent any harmful effects.This indicates that regardless of the length of time, a worker exposed to a concentration greater than the CEV may experience health impacts. This exposure cap is closely adhered to for chemicals and biological agents that might have long-term negative impacts on health.

To learn more about concentration, click here:

https://brainly.com/question/12674058

#SPJ4

Taking into account the definition of calorimetry, the change in temperature of a 5.0 g sample of water that loses 1800J of heat energy is 86.12 C.

In first place, calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is the amount of heat that a body can receive or give up without affecting its molecular structure. If the molecular structure does not change, the state (solid, liquid, gaseous) does not change. Since the molecular structure does not change, a change in temperature is observed.

In other words, sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

So, the equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Replacing in the expression to calculate heat exchanges:

1800 J= 4.18\(\frac{J}{gC}\)× 5 g× ΔT

Solving:

1800 J ÷ (4.18\(\frac{J}{gC}\)× 5 g)= ΔT

ΔT= 86.12 C

In summary, the change in temperature of a 5.0 g sample of water that loses 1800J of heat energy is 86.12 C.

Learn more:

Answer:

The dog ate the bone hiding under the shady tree.

Explanation:

The best observation is that the dog ate the bone hiding under the shady tree. This is because it provides the most graphic details about the position and activities of the dog.

Answer:

The dog ate the bone hiding under the shady tree.

Explanation:

It has the most detail :)

The Big Bang theory claims that hydrogen was the first element to form.

Atomic number 1 and the letter H are used to identify the chemical element hydrogen. In the cosmos, it makes up around 75% of the elemental mass and is the lightest and most prevalent element. At room temperature and pressure, hydrogen is a colorless, tasteless, odorless gas that is non-toxic.

The Big Bang theory claims that hydrogen was the first element to form. The universe was made of a hot, dense plasma of protons, neutrons, and electrons in the initial moments following the Big Bang. These particles merged when the cosmos cooled and expanded to create hydrogen atoms, which subsequently fused to create the first stars. Helium, carbon, oxygen, and other atoms that make up the universe we see today were converted into heavier elements through nuclear fusion in these stars.

To know more about Hydrogen, visit:

https://brainly.com/question/28557068

#SPJ4

Answer:

(NH4)2SO4

Explanation:

2NH3(aq) + H2SO4 (aq) ---> (NH4)2SO4(aq)

Ammonia reacts with sulfuric acid to give the fertilizer ammonium sulfate.

Answer:Nhóm gồm tất cả các kim loại tan trong axit sunfuric đặc nóng nhưng không tan trong axit sunfuric lo

Al, Cu, Au.

Al, Fe, Cr.

Ag, Fe, Pt.

Ag, Cu, Hg.

Explanation:

To calculate the colony-forming units per milliliter (CFU/mL), you need to know the volume plated and the number of colonies counted.

In this case, you plated 0.1 mL of urine and observed 279 colonies after incubation.

CFU/mL can be calculated using the following formula:

CFU/mL = (Number of Colonies / Volume Plated) × Dilution Factor

Since you plated 0.1 mL of urine, the volume plated is 0.1 mL. The dilution factor is assumed to be 1 since no dilution was mentioned.

CFU/mL = (279 colonies / 0.1 mL) × 1

= 2790 CFU/mL

So, there are 2790 CFU/mL of urine.

To calculate the CFU per 100 mL, you can use the following formula:

CFU per 100 mL = CFU/mL × Volume

Since you want to calculate the CFU per 100 mL, the volume is 100 mL.

CFU per 100 mL = 2790 CFU/mL × 100 mL

= 279,000 CFU

Therefore, there are 279,000 CFU per 100 mL of urine.

Learn more about volume here : brainly.com/question/24086520

#SPJ11

According to the research, a nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.

It is a procedure that leads to combining and modifying the nuclei of atoms and subatomic particles and appears to violate the law of conservation of mass.

Through this kind of process, the nuclei can be combined or fragmented, absorbing or releasing particles and energy according to each case.

Therefore, we can conclude that according to the research, a nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.

Learn more about nuclear reactions here: https://brainly.com/question/1480032

#SPJ1

We are given that Radium-226, a common isotope of radium, has a half-life of 1,620 years and we need to find how many grams of a 120-gram sample will remain after t years. We will use the formula which is given below to solve this problem:

Amount remaining = initial amount x (1/2)^(time elapsed/half-life)

First of all, we need to find out how many half-lives have elapsed using the formula which is given below:

Number of half-lives elapsed = time elapsed / half-life

The half-life of radium-226 is 1,620 years.

Hence, the number of half-lives elapsed will be:

Number of half-lives elapsed = t / 1,620

Now, we will put the value of t in the above formula to calculate the number of half-lives elapsed.

Using the value of the number of half-lives elapsed, we will calculate the amount remaining using the formula which is given below:

Amount remaining = initial amount x (1/2)^(number of half-lives elapsed)

We are given that the initial amount is 120 grams, so we will put this value in the above formula and calculate the amount remaining.

We are given that the initial amount is 120 grams, so we will put this value in the above formula and calculate the amount remaining.

Amount remaining = initial amount x (1/2)^(number of half-lives elapsed)

Amount remaining = 120 x (1/2)^(t/1620)

Now, we will simplify this expression.

We know that (1/2)^x can be written as 2^(-x).

Amount remaining = 120 x (2^(-t/1620))Amount remaining = 120/2^(t/1620)

This is the required equation which can be used to solve the given problem.

Therefore, the amount of grams of a 120-gram sample that will remain after t years using the given equation is 120/2^(t/1620).

To know more about Radium-226 visit:

brainly.com/question/16767156

#SPJ11

Answer:

2.8 moles

Explanation:

The formula for water is H2O, so one mole of water contains two moles of hydrogen and one mole of oxygen.

Here, the ratio of water particles to oxygen particles is one to one.

Therefore, in 2.8 moles of water, there are 2.8 moles of oxygen.

Hence, 2.8 moles of oxygen are required to produce 2.8 moles of water.

Answer:

It would be 1.21133177

Explanation:

0.0032 equals in centilitler= 1.21133177

Hope it helped brainiest plz

Answer:

P4O6 is the formula

Explanation:

I hope I could help

Yes, a metal will always be produced at one electrode during electrolysis.

An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit.

An electrode can be anode or cathode. During electrolysis, that is , the decomposition of a chemical compound by electricity, a metal will be deposited at the cathode.

Thus, a metal will always be produced at one electrode during electrolysis.

Learn more about electrolysis here: https://brainly.com/question/25712870

#SPJ1

Answer: FALSE

Explanation: Often, gases rather than metals form at electrodes, especially if it involves the electrolysis of a solution.