i need help:((( like now pls

Answer: The Atomic Number increases. Hope this helps!!!

Explanation:

Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass.

Answer:

The Atomic number increases....

Explanation:

Duh

Answer:

The element phosporus is located to the right of the element magnesium along the same period in the periodic table. Which best describes the relationship of the elements? Magnesium has a larger atomic number.

The calculate the minimum amount of energy needed to break the bond between two atoms, we first need to know the bond energy. Bond energy is the energy required to break a specific chemical bond between atoms. Unfortunately, without knowing the specific atoms or bond energy involved, we cannot calculate the exact minimum amount of energy needed in Joules.

The general idea of the process involved. Atoms are the smallest units of matter that make up all the elements and compounds. Kinetic energy refers to the energy of an object in motion. When two atoms are in a bound state, they are held together by a chemical bond. In order to break the bond between two atoms that are 0.1 nm apart and have no kinetic energy Determine the bond energy E for the specific chemical bond between the atoms. This value is usually given in units of Joules per mole (J/mol).  Convert the bond energy from Joules per mole to Joules per pair of atoms by dividing it by Avogadro's number 6.022 x 10^23. The resulting value will give you the minimum amount of energy that needs to be added to the system in order to break the bond between the two atoms. Keep in mind that this calculation requires knowledge of the specific atoms and bond energy.

learn more about energy here.

https://brainly.com/question/30328386

#SPJ11

Explanation:

False, gray whales average 75 miles per day at a speed of 5 mph and is the longest annual migration of any mammal.

Answer:

That would be speed.

Explanation:

Answer:

5.77% Error.

Explanation:

Given an experimental value of 275 g , and a theoretical value of 260 g, the percent error can be found using the equation:

\(\% \: error \: = \frac{ |theoretical \: value \: - \: experimental \: value | }{theoretical \: value} \times 100\)

% Error = ( | 260 - 275 | / 260 ) × 100 = ( | - 15 | / 260 ) × 100 = ( 15 / 260 ) × 100 = 1500/260 = 300 / 52 = 5.769230769230.. ≈ 5.77%

The two conditions that can cause water or liquids to backflow into a water system are back siphonage and back pressure. Option (d) is the correct answer.

Back siphonage occurs when there is a sudden decrease in water pressure in the water supply system, causing the water to flow in the opposite direction, leading to backflow. This can happen when there is a break in the main water supply line, or when there is a sudden high demand for water, such as during firefighting activities. Backpressure, on the other hand, occurs when the pressure in the downstream water system is higher than the pressure in the upstream water system.

This can happen when a pump is connected directly to a potable water system without proper backflow prevention devices or when a boiler or other heating device is connected to a water system without proper safety valves. Both of these conditions can result in contaminated or unsafe water entering the potable water supply, leading to health hazards and water quality issues. It is important to have proper backflow prevention devices installed and regularly maintained to prevent such occurrences.

To learn more about Liquids :

https://brainly.com/question/23338895

#SPJ11

Answer:

a

barium

b

calcium

e

aluminum

f

magnesium

g

copper

Forms cation

Explanation:

It is true that according to Hubble's law, the farther away a galaxy is, the faster it is moving away from us.

It is true that the formation of a star occurs when nuclear fusion begins to fuse light elements into heavier ones;

The distance to the nearest stars can be determined by parallax, the apparent shift of a start against background stars observed as the earth moves along its orbit. (Option B)

Based on the accompanying H-R Diagram, the type of start that has the greatest temperature is the blue giants (Option C)

Two hydrogen atoms come together in a nuclear fusion reaction to produce Helium Gas. (Option A).

Hubble's law, which essentially states that the velocity of a galaxy (or, as it is commonly plotted, its redshift) is precisely proportionate to its distance, also reveals crucial information about the condition of the universe. There should be no relationship between distance and velocity if the cosmos is static and unchanging.

Hubble's law is the physical cosmology observation that galaxies move away from Earth at a rate proportionate to their distance. In other words, the farther they are from Earth, the quicker they are travelling away.

Learn more about Hubble Law:
https://brainly.com/question/13705068
#SPJ1

Answer:

See explanation

Explanation:

A simple test that will distinguish flour from sugar is to dissolve the unknown substance in water.

Sugar dissolves in water due to the presence of polar groups in the chemical structure of sugar that are capable of interaction with water.

Flour does not dissolve in water. It rather becomes suspended in water when agitated and settles at the bottom of the container when the suspension is left to stand.

A compound with a soapy feel suggests that it is likely a basic substance. Basic substances have pH values above 7 on the pH scale, which ranges from 0 to 14.

The pH scale is logarithmic, meaning each unit represents a tenfold difference in hydrogen ion concentration. Given that the soapy feel is a characteristic of basic compounds, you would expect the mystery compound to exist in a pH range that is greater than 7.

This range typically falls between pH 8 and pH 14, with higher pH values indicating stronger alkaline properties.

However, without further information, it is challenging to determine the exact pH range of the mystery compound.

To know more about the pH scale refer here :

https://brainly.com/question/10825137#

#SPJ11

Answer:

releases energy from the food for us to use

Explanation:

Answer:

7.61 liters

Explanation:

From the question,

Applying Charles law formula,

V₁/T₁ = V₂/T₂...................... Equation 1

Where P₁ = initial volume of of air, V₂ = Final volume of air, T₁ = Initial Temperature of air, T₂ = Final Temperature of air.

make V₂ the subject of the equation

V₂ = (V₁×T₂)/T₁............... Equation 2

Given: V₁ = 5 liters, T₁ -35 °C = (-35+273) K = 238 K, T₂ = 89°C = (89+273) K = 362 K

Substitute these values into equation 2

V₂ = (5×362)238

V₂ = 1810/238

V₂ = 7.61 liters

The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.

Given:

Power rating of the refrigerator = 500 W

Running time per day = 12 hours

Number of days = 30

First, we need to convert the power rating from watts to kilowatts:

Power rating = 500 W / 1000 = 0.5 kW

Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:

Energy used = Power rating × Running time × Number of days

Energy used = 0.5 kW × 12 hours/day × 30 days

Energy used = 180 kWh

Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

For more question on energy

https://brainly.com/question/29339318

#SPJ8

Answer:

390.6 gram

Explanation:

Mass in gram = no of moles × molar mass

Mass in gram = 21.7×18

= 390.6 gram

Answer:

390.931576 grams

The grams of H₂ produced, if the chemical reaction produces 129 grams of  AlCl₃ are 2.92 grams. (Option b)

To determine the grams of H₂ produced, we need to use the balanced equation and the molar ratios between AlCl₃ and H₂.

From the balanced equation:

2 moles of AlCl₃ react with 3 moles of H₂

To find the moles of AlCl₃ produced:

129 grams AlCl₃ x (1 mole AlCl₃ / molar mass AlCl₃) = moles of AlCl₃

Now, using the molar ratios, we can determine the moles of H₂ produced:

moles of AlCl₃ x (3 moles H₂ / 2 moles AlCl₃) = moles of H₂

Finally, we can convert the moles of H₂ back to grams:

moles of H₂ x (molar mass H₂ / 1 mole H₂) = grams of H₂

Let's calculate it:

Given:

Mass of AlCl₃ produced = 129 grams

Molar mass of AlCl₃:

Al: 26.98 g/mol

Cl: 35.45 g/mol x 3 = 106.35 g/mol

Total molar mass = 26.98 g/mol + 106.35 g/mol = 133.33 g/mol

Calculations:

moles of AlCl₃ = 129 g AlCl₃ / 133.33 g/mol = 0.9676 moles AlCl₃

moles of H₂ = 0.9676 moles AlCl₃ x (3 moles H₂ / 2 moles AlCl₃) = 1.4514 moles H₂

grams of H₂ = 1.4514 moles H₂ x (2.02 g/mol / 1 mole H₂) = 2.93 grams of H₂

Therefore, the correct answer is b. 2.92 grams.

To know more about H₂ follow the link:

https://brainly.com/question/13656024

#SPJ4

Answer:

C.) 2

Explanation:

The pH equation is:

pH = -log[H⁺]

In this equation, [H⁺] is the molarity of the acid. In this case, the acid is HCl. Molarity can be found using the equation:

Molarity (M) = moles / volume (L)

Since you were given moles and volume, you can find the molarity of HCl.

Molarity = moles / volume

Molarity = 0.01 moles / 1.00 L

Molarity = 0.01 M

Now, you can plug the molarity of the acid into the pH equation.

pH = -log[H⁺]

pH = -log[0.01]

pH = 2

The mass of ZnSO4 produced when excess of ZnCO3 is added to 5 cm³ of 40 mol/dm³ H2SO4 is 0.0322 g.

The mass of a specific chemical element or chemical compound (g) divided by the amount of substance is known as the molar mass (mol). By multiplying the standard atomic masses (in g/mol) of the constituent atoms, one can determine the molar mass of a compound.

ZnCO3 + H2SO4 → ZnSO4 + CO2 + H2O

n(H2SO4) = C x V = 0.04 mol/dm³ x 0.005 dm³ = 0.0002 moles

Since ZnCO3 is in excess, the number of moles of ZnSO4 produced is equal to the number of moles of H2SO4 used in the reaction, which is 0.0002 moles.

MM(ZnSO4) = 161 g/mol

The mass of ZnSO4 produced can be calculated using the following equation:

Mass of ZnSO4 = Number of moles of ZnSO4 × Molar mass of ZnSO4

= 0.0002 moles × 161 g/mol

= 0.0322 g

To know more about molar mass visit:-

brainly.com/question/2399130

#SPJ1

The decrease in concentration (ΔO₂) of O₂ each year, given that for every two CO₂ produced, three O₂ are required from the atmosphere, can be calculated using the equation:

ΔO₂ = (3/2) * ΔCO₂

Where:

ΔO₂ represents the decrease in concentration of O₂

ΔCO₂ represents the increase in concentration of CO₂

According to the given information, for every two CO₂ produced, three O₂ are required. This ratio of 3 O₂ to 2 CO₂ can be used to determine the change in concentration.

Therefore, the decrease in concentration of O₂ each year is equal to (3/2) times the increase in concentration of CO₂.

It's important to note that the units of concentration should match, such as parts per million (ppm), for both CO₂ and O₂. The resulting decrease in concentration of O₂ (ΔO₂) will also be in ppm.

Learn more about parts per million

https://brainly.com/question/25104378

#SPJ11

The statements which is true about the reactants from the given simulation above is: It involves the breaking of chemical bonds.

The correct answer choice is option c

For a chemical reaction to occur, the bond between the reacting substances breaks either by covalent or electrovalent bonding in order to form new substance.

So therefore, reactants usually break chemical bonds duringchemical reaction.

Complete question:

A chemical reaction causes the chemical compositions of substances to change. Reactants are substances that enter into a reaction, and products are substances produced by the reaction

Which of the following are the reactants for this simulation? Select all that apply

a. A chemical reaction results to formation of new bonds

b. A chemical reaction involves the formation of new substance.

c. It involves the breaking of chemical bonds

Read more chemical reactions: https://brainly.com/question/5024599

#SPJ1

Lactic acid fermentation is not a reasonable long-term solution to a lack of oxygen because it is an inefficient process in terms of energy production and can lead to the accumulation of lactic acid.

During lactic acid fermentation, glucose is converted into lactic acid in the absence of oxygen. This process allows for the regeneration of NAD+ to sustain glycolysis, which is the primary pathway for ATP production in the absence of oxygen. However, lactic acid fermentation produces only a limited amount of ATP compared to aerobic respiration, which is the process that occurs in the presence of oxygen.

Additionally, lactic acid buildup can lead to a decrease in intracellular pH, causing acidification of the cells. This acidic environment can negatively impact cellular processes and potentially lead to cell damage. The accumulation of lactic acid also limits the ability of cells to perform essential functions, including muscle contraction.

In contrast, aerobic respiration, which occurs in the presence of oxygen, is a much more efficient process for ATP production. It generates a significantly higher amount of ATP per glucose molecule compared to lactic acid fermentation. Therefore, in the long term, relying solely on lactic acid fermentation would result in reduced energy production and potential harm to cellular function.

To learn more about fermentation , click here: brainly.com/question/29760642

#SPJ11

Answer:

the salt combine into physical and

chemical properties.

Answer:

it can be increased by the number of atoms on each side

The δh° for the process SB (s) + Cl2 (g) → SbCl5 (s) is -394 kJ using Hess's-Law.

Hess's Law states that the enthalpy change of a reaction is independent of the pathway taken and depends only on the initial and final states. By combining the given reactions, we can cancel out the intermediate compound (SbCl3) and obtain the desired reaction. The enthalpy change for the first reaction (SB (s) + Cl2 (g) → SbCl3 (s)) is -314 kJ, and for the second reaction (SbCl3 (s) + Cl2 (g) → SbCl5 (s)) is -80 kJ. By adding these two reactions, we obtain the overall reaction with a δh° of -394 kJ.

Learn more about  Hess's Law

brainly.com/question/10504932

#SPJ11

Answer:

The number of proton of magnisium = 12

Answer:

False, it is actually 100 kelvins

Explanation:

The statement is false. Electrodes should not be removed from the sealed protective envelope before use without worry of them drying out.

Electrodes, particularly those used in electrochemical systems, are typically designed to be stored and transported in a sealed protective envelope to prevent them from drying out. The envelope serves as a barrier to moisture and helps maintain the integrity of the electrode. Removing the electrodes from this sealed envelope exposes them to the surrounding environment, which can lead to drying out.

Electrodes are often made of sensitive materials or contain specific electrolytes that require a controlled environment to maintain their performance and stability. By removing the electrodes from their protective envelope, they become susceptible to moisture, air, and other external factors that can potentially affect their functionality and performance. Therefore, it is important to keep electrodes in their sealed protective envelope until they are ready to be used to ensure their optimal performance and longevity.

Learn more about electrochemical systems here: brainly.com/question/31606417

#SPJ11

Answer:

Explanation:

The first one is CrO.  The Chromium has the same charge as the oxygen so mol numbers are dropped.

The Second one is CrO2 The two oxygens have a charge of 2(-2) = -4. To balance this, the Chromium must have a charge of +4 Cr(Iv)O2

The third one is can be set up like this

Cr + 3(-2) = 0

Cr - 6 = 0

Cr = 6

Therefore the formula is Cr(vi)O3

The last one is a bit tricky. Follow this carefully. There are 2 Crs and 3Os.

The formula looks like this

2Cr + 3(-2) = 0

2Cr - 6 = 0

2Cr = 6

Cr = 3

The formula is Cr(iii)2 O3

Explanation:

55 kilometers per hour to meters per second

First we have to convert the kilometers to grams;

1 kilometer = 1,000 meters

This means we have;

55000 meters per hour

Converting hour to seconds;

1 hour = 60 minutes

1 minute = 60 seconds

1 hour = 60 * 60 = 3600 seconds

We divide 55000 by 3600;

55000 / 3600 = 15.28 meters per second

Explanation:

55 kilometers per hour to meters per second

First we have to convert the kilometers to grams;

1 kilometer = 1,000 meters

This means we have;

55000 meters per hour

Converting hour to seconds;

1 hour = 60 minutes

1 minute = 60 seconds

1 hour = 60 * 60 = 3600 seconds

We divide 55000 by 3600;

55000 / 3600 = 15.28 meters per second