Chemistry High School

what's the answer plz help​

What's The Answer Plz Help

Answers

Answer 1
c. one energy level
Answer 2

Answer:

C.. one enegry level..

Related Questions

what are class C fire extinguishers used for

Answers

they are used on fires that involve electricity such as electrical fires which can be very dangerous

What is the correct formula for calcium dihydrogen phosphate?

A) CaH2PO4
B) Ca(H2PO4)2
C) Ca(H2HPO4)2
D) Ca2H2PO4

Answers

Answer:

B) Ca(H2PO4)2

Explanation:

To solve this we must be knowing each and every concept related to chemical formula.  Therefore, the correct option is option B among all the given options.

What is chemical formula?

The chemical formula is indeed a means of expressing information about just the chemical proportion of atoms that comprise a certain chemical compound as well as molecule through the use of chemical element numbers and symbols.

Furthermore, the molecular formula does not contain any words and does not serve as a chemical name. However, it just indicates basic chemical structures and is not the same as the entire chemical structural formula.  The correct formula for calcium dihydrogen phosphate is Ca(H[tex]_2[/tex]PO[tex]_4[/tex])[tex]_2[/tex].

Therefore, the correct option is option B among all the given options.

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Calculate the following expression and round your answer to the correct number of significant figures.
52.6cm x 1.214cm

Answers

Answer:

63.9 cm

Explanation:

Looking at the periodic table, which of theses elements has the smallest atomic radius (A. Sodium B. potasaium C. Hydrogen D. LithIum)

Answers

Answer:

The answer is C. Hydrogen

Explanation:

It has a radius of 53 pm calculated.

how many unpaired electrons does calcium have

Answers

Answer:

0

Explanation:

The number of unpaired electrons in  is 0

Answer:

4 unpaired electrons

Explanation:

becausd it have 4 unpaired electros it is paramagnetic

Which of the following is an example of the Law of Conservation of Mass?

Answers

Answer:

C.

Explanation:

The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases, equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.

Answer:

C, since matter cannot be created or destroyed the same number of particles must be present on both sides of the equation. Hence why all chemical reactions must be balanced.

Explanation:

What is the density of a sample of lead that has a mass of 4.85 kg and a density of 280 cm ^3?

Answers

Answer:

The answer is 0.017 kg/cm³

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 4.85 kg

volume = 280 cm³

We have

[tex]density = \frac{4.85}{280} \\ = 0.01732...[/tex]

We have the final answer as

0.017 kg/cm³

Hope this helps you

Calculate the wavelength of a photon of light having a frequency of 3.50 x 1015 Hz. A. 1.05 x 1024 m B. 1.33 x 1016 m C. 8.57 x 10-8m D. 1.17 x 107 m​

Answers

Answer:

1.17x107m

Explanation:

Which one of the following is an alkane?

A. C2H4
B. C5H10
C. C3H8
D. C4H6

Answers

Hello

Answer :

C. C3H8

a drop of water has a volume of about 0.05 mL. How many molecules of water are in a drop of water?

Answers

Answer:

20 drops

Explanation:

An irregular object with a mass of 18.00 kg displaces 2.50 L of water when placed in a large overflow container. Calculate the density of the object.

Answers

Answer:

7.20 kg/L

Explanation:

Density is mass (kg) / volume (L).

18.00kg/2.50L = 7.20 kg/L

If you need it in g/mL this is the equation:

[tex]\frac{7.20kg}{L} *\frac{1000g}{1kg} *\frac{1L}{1000mL} = 7.20g/mL[/tex]

Which of the following represents a pair of isotopes?
A. Ca+2, Be+2
B. 12C, 14C
C. Fe+2, Fe+3
D. 7N, 8O

Answers

B.
Isotopes is an atom has same number of electrons and protons but different number of neutron.

We have that

the Carbon isotopes represents a pair of isotopes

12C, 14C

Option B

From the question we are told

Which of the following represents a pair of isotopes?

A. Ca+2, Be+2 B. 12C, 14C C. Fe+2, Fe+3 D. 7N, 8O

Generally

Isotopes

This is defined as variant forms of an element with variant atomic mass but same proton number

Therefore

the Carbon isotopes represents a pair of isotopes

12C, 14C

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how many significant figures in 890

Answers

Answer:

890 has 2 significant figures

Explanation:

When measuring the volume of a liquid, why is it best to use a measuring container that is narrow?

Answers

so as to minimize the interference of a deeper meniscus, allowing for more accurate measurement

Answer:

n the sciences, the “tools” for measuring the volumes of liquids are generally made from glass, plastic or occasionally metal, although professionals referred to all of them as “glassware.” Scientists, and chemists in particular, have a variety of glassware at their disposal for measuring volumes. The particular piece of glassware chosen in any situation will depend primarily upon two factors: the required volume and the accuracy required for the measurement.

Explanation:

Hope this helps leave a heart c:

4. How does the water vapor change as altitude increases?

Answers

Answer:

it drifts through the atmosphere and the vapor absorbs heat then the warm air rises up therefore leaving the planet's surface and releasing the heat back into the upper part of the atmosphere

what is one way that the thermal energy of a system may be changed?

Answers

Answer:

In a open system, the thermal energy of a system may be changed by adding or removing matter with a different temperature.

Explanation:

The thermal energy of a system can be changed when a new substance of different temperature is introduced into the system

The thermal energy of a system is the amount of heat energy contained in that system.

The quantity of heat in a system is given as;

[tex]Q = mc \Delta \theta[/tex]

where;

[tex]\Delta \theta[/tex] is the change in the temperature of the system

When a new substance is introduced into the system, the temperature of the resulting system changes.

For example;

a hot iron introduced into a cold water, will increase the temperature of the water thereby increasing the thermal energy of the water.

Thus, the thermal energy of a system can be changed when a new substance of different temperature is introduced into the system.

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Explain what is meant by the natural abundance of isotopes. Can someone help me to answer this plz

Answers

“Is a percentage of atoms with a specific atomic mass found in a naturally occurring sample of an element.” < you can try and put it in your own words or you could stick with that just add quotations :)

Which statement best explains why aluminum is a pure substance? Group of answer choices Aluminum is one type of atom and its composition is always the same. Aluminum has a composition that is evenly mixed. The aluminum atom cannot be seen with a microscope. Aluminum contains substances that are not bonded together.

Answers

Answer:  

The best explanation for both the first and second claims is that aluminum is a pure substance: Aluminum is one form of atom and its structure is always the same.  Aluminum has an evenly blended composition.

Explanation:

Aluminum is one type of atom and its composition is always the same, this statement also gives the property of a pure substance . In fact, pure substances are often homogeneous and contain only one form of atom or molecule.

One of a pure substance's key characteristics is that it has a uniform composition that is homologous in nature, and can be mixed uniformly throughout. ALUMINUM's second statement notes the property of a pure substance. Aluminum is also homologous in terms of occurrence.

The atoms are very small and have a diameter of around 1 x 10-10 meters. It's difficult to view them using a light microscope due to their limited size. Although it may not be possible to view an atom using a light microscope, a number of techniques have been developed, such as electron microscopy, to observe and research the structure of atoms. Therefore, the statement that the aluminum atom can not be seen through a microscope does not explain the pure content of aluminum.

This argument - 'Aluminum contains substances which are not bound together' does not explain the fact that it is a pure material as it notes that the property of a pure material does not exist in relation to its chemical bonds.

.Therefore, the first and second aluminum statements give the best description of a pure material.

why do astronomers use frequencies other than the visible ones when they are investigating the universe?

Answers

Because different objects give out electromagnetic radiation at different frequencies. Some objects are very ea...

Hope this help

If 5,800 j of energy are applied to a 15.2 kg piece of lead, by how much does the temp change if the specific heat of lead is 0.128

Answers

Answer:

The answer will be 2.98K

Explanation:

Using the formula:

Q = mc∆T

Q= 5,800 (heat in joules)

m= convert 15.2kg to g which is 15200g (mass in grams)

c= 0.128 J/g °c (Specific heat capacity)

∆T=  what we need to find (temperature change)

5800J = 15200g x 0.128 x ∆T

= 2.98K  

what is kwaishokor?
​

Answers

Answer:

Kwaishokor is a form of severe protein malnutrition characterized by edema and an enlarged liver with fattty infiltrates.

Explanation:

if two group in the game are exirting equal ad opposite force the rope,will the rope move?

Answers

Answer:

No.

Explanation:

If the forces are acting on opposite direction, they will cancel out each other. As a result, the object will not move. This type of force is called balanced force. In this type of force the net force acting on an object is equal to 0. Hence, if two groups in the game are exerting equal and opposite force, the rope will not move.

What is the relationship between the temperature and the rate of the reaction?

negative
neutral
positive

Answers

i think it would be neutral

Please help I don't understand this-

Answers

Answer:

im sorry i think i know the answer but i dont want you to get it wrong

Explanation:

Answer:its C

Explanation:

bc were learning bout rn n we lagit just went over this

i will give brainliest and lots of points

Answers

Answer:yyyyyyyyyeeeeeeetttttt you will figure it out

Explanation:

Which pair of elements have the same number of atomic orbitals?
A.
Silver and strontium
B.
Sodium and strontium
C.
Silver and sulfur
D.
Sulfur and strontium

Answers

Answer:

B I think

Explanation:

Answer:

B, I'm guessing by their characteristics

how much is 3.5 gallons in cups

Answers

Answer:

3.6 gallons are equal to 56 cups

0.20dm
2. How many grams of salt, NaCl need to be dissolved in 0.50dm of solution to
make a 0.20moldm solution?

Answers

Answer:

I don't no sorry. ਕਿਉੁਂਕਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ 478figxigxurRyyv ਸ੍

Why do you think many metals are good at conducting electricity?
Hurry, please!!!

Answers

Answer. Metals are excellent conductors because the atoms in a metal form a matrix through which their outer electrons can move freely. Instead of orbiting their respective metal atoms, they form a "sea" of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions

Who wants to do my acellus work? Or know how to get the answers ?

Answers

im just answering questions to get points Explanation:

i dont know what points do

Answer:

Hello I passed my Chemistry exam (Acellus) in the beginning of June:)

Explanation:

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A car has a 16-gallon fuel tank. When driven on a highway, it has a gas mileage of 30 miles per gallon. The gas mileage (also called "fuel efficiency") tells us the number of miles the car can travel for a particular amount of fuel (one gallon of gasoline, in this case). After filling the gastank, the driver got on a highway and drove for a while.How many miles has the car traveled if it has 10 gallons of gas left in the tank? and write an equation that represents the relationship between the distance the car has traveled in mikes, d, and the amount of gas left in the tank in gallons, x Whats the total distance he travels What is 17/5 as a mixed number in simplest form? Substitute x = 3 into the equation x+33 +2.V x +33 + 2 =Enter your next step here What is so special about Don Quixote and Sancho Panza?They worked with Cervantes.They never even existed.They had a squire named La Mancha.They lived in England. What was a problem caused by Sumerian city-states'independence from one another? The city of Ashkelon, on the eastern end of the Mediterranean Sea, is one of the major cities of the Philistines. A powerful merchant family (known henceforth as The Family) of this city has to decide how to allocate its vast but finite resources to further their own wealth and the glory and influence of their state. Some trade routes use camel caravans and go to the southern deserts, where they may trade in salt and gold with the great inland African nations; others may go north and west, oversea by galley, toward the Greeks; others may push their foul-mouthed, humped mounts east, overland toward Sumeria, to trade in spices and the crafted goods specific to that region. Some of the routes are over more arduous terrain than others, so make take longer to pay off (no revenue is realized by The Family until the caravan returns to Ashkelon). The financial costs and returns of each route are as follows (in Phils, the currency of the Philistines:Route Costs,Period 0 Revenue, Period1 Revenue, Period 2 Revenue, Period 3African Route - 75,000 215,000Greek Route - 50,000 140,000Sumerian Route -125,000 385,000Costs are incurred at the end of year zero, and revenues accrue at the end of Periods 1, 2, and 3, for each respective route (for instance, the African caravan returns at the end of period two, at which time its revenue is realized). The discount rate for the shipping company is 5%.a. Calculate the NPV, B/C ratio, Payback period, and IRR for each route option b. Rank the route options according to NPV, B/C ratio, Payback period, and IRR c. If the company had unlimited funds, which trade routes would you recommend the family pursue? Why? Be sure to consider all combinations of routes, including multiple caravans on the same trade routed. Given that the family can only invest 150,000 Phils, which combination of trade routes would you recommend pursuing? Why? A chair costs $155. What is the total cost with a 30% discount and 5.5% sales tax? Which health risk is associated with tanning beds? the quotient of 5 times a number and 7 is equal to 10 what is the number (Random question no. 3) As we all know that cats love eating rats, Why isnt there mouse-flavored cat food?Answer it only if you can Complete the expression so it forms a perfect-square trinomial.x + x + 49 The formulas below are the cost and revenue functions for a company that manufactures and sells small radios.C(x)= 64,000 + 45x and R(x) = 49xa. Use the formulas shown to write the company's profit function, P, from producing and selling x radios.b. Find the company's profit if 24,000 radios are produced and sold.a. The company's profit function is P(x) =(Simplify your answer.) I need help with number 15 please help Which option best defines the term citizen?A. A person with certain legal rights and responsibilities in a countryB. A person with both parents and grandparents living in a countryC. A person who serves in the military or government for a countryO D. A person who owns property and earns money in a countrySUBMIT What is the y-intercept of the function f(x) =-2/9x + 1/3?-2/9-1/31/32/9 is 9.68 rational or irrational? Click on the correct answer.\(\frac{2}{5}\div2\frac{1}{4}\)a:\(\frac{8}{45}\)b:\(\frac{9}{10}\)c:\(1\frac{1}{9}\)d:\(5\frac{5}{8}\) Treys grandmother has a framed picture with side lengths that are 12 inches. Trey wants to know how much wall space is needed for the picture.What is the area of a picture with side lengths that are 12 inches? Use the formula A= s^2, where s is the length of one side.A. 12in.^2B. 144in.^2C. 24in.^2D. 288in.^2 DYSTOPIAN NARRATIVE ESSAY IDEAS! WHAT CAN I WRITE ABOUT? I JUST NEED AN IDEA! WILL MARK BRAINLIEST! IF YOUR ANSWER IS UNAPPLICABLE, I WILL REPORT IT! THANKS!