someone help please :)

Someone Help Please :)

Answers

Answer 1

6.79 x 10⁶

Further explanation  

Scientific Notation consists of 2 parts  

1. the first part: the first digit followed by the decimal point  

2. The second part: the power of 10 (the exponents).which shows the number of digits after the decimal point  

To add/subtract, the exponents must be the same and then add/subtract the coefficient

convert the largest exponent

[tex]\tt 7.2\times 10^6\rightarrow 72\times 10^5[/tex]

subtract the coefficients

[tex]\tt =(72-4.1)\times 10^5\\\\=67.9\times 10^5\rightarrow 6.79\times 10^6[/tex]


Related Questions

Is this equation completely balanced?

2C8H8 + 25O2 = 8CO2 + 18H2O

A. No, because the number of carbon, hydrogen & oxygen atoms on both sides of the equation are not equal.

B. No, because the number of oxygen atoms on both sides of the equation are not equal.

C. Yes, because all of the coefficients are in their lowest whole number ratio.

D. No, because the number of hydrogen atoms on both sides of the equation are not equal.

E. Yes, because the number of products is equal to the number of reactants.

Answers

Answer: No because the number of carbon hydrogen and oxygen atoms on both sides of the equations are not equal

When we look at the periodic table of elements, the elements in a have the same number of valence electrons

Answers


Elements in the same group on the periodic table have the same number of valence electrons. The "groups" are the column (or rows). groups are vertically and periods are horizontally.

What is meaning of metabolism

Answers

Answer:

Metabolism is a combination of biochemical processes that your body uses to convert food into energy. These metabolic processes include breathing, eating and digesting food, the delivery of nutrients to your cells through the blood, the use of energy by your muscles, nerves, and cells, and finally the elimination of waste products from your body.

Hope this Helps!

Metabolism is the chemical processes that occur within a living organism in order to maintain life.

Hopes this helps luv! ο(=•ω<=)ρ⌒☆

Which of these is an example of a homogeneous mixture
A- Distilled water
B- A bar of pure gold
C- A solution of salt water
D- Carbon dioxide

Answers

Answer:

C- A solution of salt water

Explanation:

You cannot see the salt within the water, for it has already dissolved. The contents are uniformly distributed throughout the water's volume.

I hope this made sense! (^-^)

6. This is the most commonly abused illegal drug in the United States
(5 Points)
Nicotine
Marijuana
Alcohol
Opioids

Answers

The answer is the second one which is marijuana

What happens when the two negative ions are brought close together?

Answers

They attract each other to form ionic networks.


Xenon-60 In order, what is the number of protons, electrons, and neutrons.

60,6,6

54,54,6

6,54,54

Answers

Answer:

I would say B?

54,54,6

Explanation:

Help!! In desperate need of help!!??

Answers

Answer:

MgO

Explanation:

A suspect could be exonerated if his/her hair was not found at a crime scene. True or False. If false why?

Answers

Answer:

False

Explanation:

Just because their hair is their doesn't mean they where their during that time period or their at all. It could have been brought in by someone else's clothes.

Please award me brainliest

We can determine the culprits by extracting the fingerprints and DNAs from the hair strand taken from the crime location. But if suspected one's hair is not found from the scene does not indicated that he or she was not involved in the crime. Hence, the statement is false.

What is forensic tests?

Forensic laboratories tests samples from crime scenes. There are various advanced testing methods which helps to identify the culprits of a crime. For example the hair and fingerprints, clothes or any chemical materials, blood etc. obtained from the crime scene are tested to identify its owner.

Hair is made of proteins. From each hair strand we can extract a number of DNA molecules. Thus a hair strand obtained from a crime scene can be tested and can identify its owner.

However, sometimes there will be no evidences such as hair or blood in the crime location or sometime the may some samples which are not related the culprits.

Hence, it cannot be said that if there is no hair or any sample related with the suspected one from the crime scene, that they could be exonerated. Thus the statement is falls and he/she can be a culprit which can be proved in another way.

To find more about forensic tests, refer the link below:

https://brainly.com/question/9029550

#SPJ2

What makes up a film badge?

an electrolyte paste spread across a plastic sheet

a thin film of salts and other chemicals on clear acetate

layers of photographic film covered in black paper

a panel of photographic film exposed to the air

Answers

Answer:

Question:-

What makes up a film badge?

Answer:-

a panel of photographic film exposed to the air

What is the mass of 2.3 moles of SnF4?

Answers

447.81830943999995. that's the mass

A 48.9 g piece of aluminum is dropped in a graduated cylinder partially filled with water. The original volume of water in the cylinder was 41.8 mL. The water rose to 54.4 mL when the aluminum was dropped in. What is the density of the aluminum?

Answers

Answer:

3.88g/mL

Explanation:

Density could be understood as the mass of a compound when it occupies 1mL.

To find the mass in 1mL we need to determine the volume that the piece occupies:

Based on Archimedes' principle, the volume of water displaced is equal to volume of the aluminium piece, that is:

54.4mL - 41.8mL = 12.6mL

As the piece has as mass 48.9g, the density is:

48.9g / 12.6mL =

3.88g/mL

A dog barks to alert his owner. What is the medium for the sound waves produced
by the dog barking? lesson 4.01
A. Air
B. ground
C. water
D. the ocean

Answers

Answer:

The Answer is ground or air

The element in Group 14 Period 4 has how many neutrons and is it a metal, nonmetal, metalloid or noble gas.

Answers

Number of neutrons=41, and it is metalloid

Further explanation

Group 14⇒valence electron = 4(ns²np²)

Period 4⇒n=4

So electron configuration of the element :

1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p² = 32 electron=atomic number

The element with atomic number 32, which is in period 4 and group 14 is Ge-Germanium

There are seven elements that can be classified as metalloids, namely boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), and polonium (Po).

While the mass number: 73

So the number of neutrons = mass number-atomic number

[tex]\tt 73-32=41[/tex]

When solid magnesium burns, it reacts with oxygen in the air to form a powder called magnesium oxide. A chemist performed this reaction in a lab and found that the mass of the magnesium oxide was greater than the mass of the magnesium. What is the reason behind this increase in mass?

Answers

Answer:

magnesium oxide is greater than the mass of the magnesium.

Which statement describes an advantage of asexual reproduction?
O Asexual reproduction results in variations in DNA.
o Asexual reproduction causes less competition for resources.
o Asexual reproduction is faster tha sexual reproduction.
O Asexual reproduction requires more energy than sexual reproduction.
Activity

Answers

Asexual reproduction is faster tha sexual reproduction.

In asexual reproduction there is mitosis. There is prophase, metaphase, anaphase, and telphase. In sexual reproduction there is meiosis. Meiosis does have prophase, metaphase, anaphase, and telophase. But it has two stages of that. So it also has prophase 2, metaphase 2, anaphase 2, and telophase 2,

Explanation:

Barbara completed an assignment for extra credit in science class. She used a pH meter to find the pH of different substances.

After she finished measuring the pHs, she created a diagram that showed the substances arranged in order from the most acidic to the most basic.


If Barbara added lemon juice—pH 2.2—to her investigation, where should it appear in her diagram?
A.
between milk and water
B.
to the left of cola
C.
between soap and bleach
D.
between water and blood

Answers

To the left of cola, using the process of elimination and counting you can verify that lemonade fits to right of cola.

Answer:

if ur here for the coffee one its between cola and acid rain

Explanation:

ur mom

2. When the vapor pressure of water is 80 kpa the temperature of the
water is:
O 93 °C
O 103 °C
O 60°C
None of above

Answers

Answer:

103

Explanation:

ee

How do plants take in oxygen?
Through photosynthesis
Through the stomata
By eating food
By sleeping

Answers

Through stomata....

hope it's helpful :)

What is the formula for calculating time

Answers

Answer:

A

Explanation:

bc its right

Which of the following would be a good choice of metal spoons to stir a
solution of lead(II) nitrate?
A. Silver
B. tin
C. nickel
D. Fe

Answers

Answer:

A. Silver

Explanation:

In order to answer this question accurately, we must have a good knowledge about the position of metals in the electrochemical series.

We must know that metals that are high above in the electrochemical series displace metals that are lower in the series from their aqueous solution. This means that tin, nickel and iron  can all displace the lead from the solution of lead(II) nitrate.

However, silver is far less reactive than lead so it can not displace lead from its aqueous solution, hence the answer above.

difference between calcium sulfide and calcium sulfate.

Answers

Answer: Calcium sulfide is a chemical compound having formula CaS. While  Calcium sulfide is inorganic compound g fomlaCaSO4.

Explanation:

calcium sulfide is use in  preparation of  hydrogen sulfide, luminous pain and as a depilatory in cosmetics while  calcium sulfate is used as desiccant. calcium sulfides is  white material crystallizes in cubes like rock salt while calcium sulfate has three different crystalized forms known as hemihydrate (CaSO4⋅12H2O) , anhydrate (CaSO4) and as  gypsum (CaSO4⋅2H2O). hope this explanation will be helpful for you

what happens to the radius of the atoms of an element as you go towards the right in a row of the periodic table ?

Answers

Answer:

It decreases

Explanation:

As one moves from left to right on the periodic table, the radius of atoms reduces due to the nuclear pull.

The size of an atom estimated by the atomic radius is taken as half of the internuclear distance between the two covalently bonded atoms of non-metallic elements. Across a period, atomic radius decreases progressively from left to right. This is due to the increasing nuclear charge without attendant increase in the number of electronic shell.

Will give brainliest

Answers

If this is an option for u hopefully it helps I’m not sure tho I searched it

Order the liquids from most dense to least dense: Water, Pancake Syrup/Maple Syrup, Cooking Oil, Milk, Dish Soap

Answers

The answer should be Syrup, Dish soap, milk, water and then cooking oil.

Which is classified as nonpolar covalent?
1) hydrogen and iodine
2) carbon and sulfur
3) hydrogen and chlorine
4) nitrogen and hydrogen

Answers

Answer:

3 i think...............

Answer:

3

Explanation:

When Iodine-131 emits a β particle (beta particle), what nuclide is produced? *

Answers

When Iodine-131 emits a β particle will produce Xe-131

Further explanation

Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,  

alpha α particles ₂He⁴ beta β ₋₁e⁰ particles gamma particles ₀γ⁰ positron particles ₁e⁰ neutron ₀n¹

So for reaction Iodine-131 :

[tex]\tt _{53}^{131}I\rightarrow _{-1}^0\beta +_{54}^{131}Xe[/tex]

Question, Answer, and Explanation are within the picture of files:

If you have 1.2754x1020 molecules of Barium nitrate (Ba(NO3)2), how many moles of barium nitrate do you have?

Answer: ??? moles Ba(NO3)2 (round to 5 sig figs)

Answers

Answer:

0.00021186 moles of barium nitrate

Explanation:

The given parameter is as follows;

The number of molecules of Barium nitrate Ba(NO₃)₂ = 1.2754 × 10²⁰ molecules

The number of molecule present per mole of Barium nitrate, is given by Avogadro's number, 6.02 × 10²³

1 mole of a substance contains 6.02 × 10²³ molecules

The umber of moles in a substance = (The number of molecules of the substance)/(The number of molecules per mole)

Therefore the number of moles of barium nitrate in 1.2754 × 10²⁰ molecules of barium nitrate = (1.2754 × 10²⁰)/(6.02 × 10²³) ≈ 0.00021186 moles (rounding to 5 significant figures)

The number of moles of barium nitrate present in 1.2754 × 10²⁰ molecules of barium nitrate ≈ 0.00021186 moles

6. A serving of Cheez-Its releases 130 kcal (1 kcal = 4.18 kJ) when digested by your body. If this same amount of energy were transferred to 2.5 kg of water at 27°C, what would the final temperature be?​

Answers

Answer:

78.8°C

Explanation:

Given parameters:

Amount of heat energy  = 130kCal

Mass of the cheese  = 2.5kg

Initial temperature  = 27°C

Unknown:

Final temperature  = ?

Solution:

To solve this problem, use the expression below;

       H = m C (T₂ - T₁)

H is the amount of heat

m is the mass

C is the specific heat capacity of water  = 4200J/kg°C

Now,

     convert the amount of heat to kJ;

            1kCal  = 4.18KJ

           130kCal  = 130 x 4.18  = 543.4kJ

Insert the parameters and solve;

       543.4 x 10³ = 2.5 x 4200 x (T₂ - 27 )

         543.4 x 10³  = 10500 x  (T₂ - 27 )

           (T₂ - 27 ) = 51.75

            T₂ = 51.75 + 27  = 78.8°C

You walk 75 meters in 5 hours. What is your speed?
A.10 m/hr
B.5 m/hr
C.15 m/hr
D.12 m/hr
HELP!

Answers

C. 15 m/hr
Speed = distance/ time
Other Questions
PLZ HELP! CANT FIND ANY AVAILABLE TUTORS RIGHT NOW!!!! NEED HELP ASAP! BEEN STUCK ON THIS PROBLEM FOR SO LONG I NEED FURTHER EXPLANATIONS!!!! hELP PLEASE PLEASE PLEASE PLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASE I JUST NEED THE ASNWER PLEASE PLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASEPLEASE Define null hypothesis. In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. For example, the note at 110 Hz has two strings at this frequency. If one string slips from its normal tension of 600 N to 540 N, what beat frequency is heard when the hammer strikes the two strings simultaneously? What is the percent of increase from 600,000 to 1,000,000? There are_periods included in the periodic table.Answer hereSUBMITs can i have some help Which sentence best captures the central idea of the informational text Pediatrics Official Journal of the American Academy of Pediatrics? 1 point a)The AAP provides suggestions to pediatricians on the various ways they can inform individuals, the public, and take action about healthy media use among adolescents b)The AAP describes the variety of media available to adolescents continues to increase health concerns c)The AAP suggests how pediatricians are very limited in the ways they can inform individuals about the safety use of media exposure among teens d)The AAP explains how pediatricians could offer advice on how to monitor adolescent media use at home onlyPlz answer as soon as possible how did common sense affect colonial thinking Describe 2 of the New Deal programs and their impact today Victoria charges $9 per hour for babysitting. Taylor charges $10.50 per hour for babysitting. If they both work for 5 hours. how much more will Taylor earn than Victoria? -3.2 < -3 Is this true or false? Steve can run 1 2/9 miles in 10 minutes. How many miles can he run in 30 minutes? what is the distance between -48 and 17 on a number line Please help! Ill give brainliest :)X = ___ ??Y = ___ ?? b. Some of Company X's new practices and systems are unethical. Business ethics is a set of codesabout how a business should conduct itself. In what ways is Company X not applying ethical practices?(1 point) !!!HELP ME WITH THIS QUESTION PLEASE!!! Hudson and know are running a race. Know got a 30 foot head start. Hudson is running at 8.8 feet per second. Know is running at 6.3 feet per second. How many seconds until know and Hudson are at the same place. which term describes the governments Italy, Germany and the soviet union in the early Write the slope-intercept form of the equation of the line given the slope and the y-intercept.8Slope = -y-intercept = 43