Question is in picture

Question Is In Picture

Answers

Answer 1

Answer:

30

Explanation:

I believe it's 30 because half of 24 is 12 and that is its half life. And as you know it took 30 minutes to get there.


Related Questions

What type of energy must you add to a substance to make the particles of the substance
move faster?

A. thermal

B. potential

C. mechanical

D. geothermal

Answers

Answer: thermal  energy a}

Explanation:

Thermal energy (also called heat energy) is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy.

A. thermal
B.potential

Answer is A

How are hydrogen atoms arranged in ethene? in -different planes, separated by angles of 180° in -the same plane, separated by angles of 120° in -the same plane, separated by angles of 1800 in -different planes, separated by angles of 1200​

Answers

Answer:

Explanation:

How best to demonstrate the equivalence of hydrogens in  

H 2 C = C H 2 ?

1 H NM R spectroscopy would be the best way to show this. The 4 hydrogens give the one signal.

Explanation:

Can someone please help

Answers

Answer:

1. c) shiny

2) True. Reactivity is a chemical property.

1. A metal is shiny

2. yes

that's all

In a city, the buildings, streets, air,
and water are all ______
parts of the environment.

Answers

Answer:

living part of the environment

If 27.3g of C8H18 is combusted, according to the equation below, what mass of water is produced?

2C8H18 + 25O2 --> 16CO2 + 18 H2O,

molar masses: C8H18 = 114.3 g/mol O2 = 32.0 g/mol CO2 = 44.0 g/mol H2O = 18.0 g/mol

Answers

Answer:

38.7 g

Explanation:

2C₈H₁₈ + 25O₂ → 16CO₂ + 18 H₂O

First we convert 27.3 grams of C₈H₁₈ into moles, using the given molar mass:

27.3 g C₈H₁₈ ÷ 114.3 g/mol = 0.239 mol C₈H₁₈

Then we convert 0.239 moles of C₈H₁₈ into moles of H₂O, using the stoichiometric coefficients of the reaction:

0.239 mol C₈H₁₈ * [tex]\frac{18molH_2O}{2molC_8H_{18}}[/tex] = 2.151 mol H₂O

Finally we convert 2.151 moles of H₂O into grams, using water's molar mass:

2.151 mol H₂O * 18.0 g/mol = 38.7 g

why is the air so warm at the equator​

Answers

Because it’s the closest part of the earth to the sun. Basically the sun’s rays hit there more than anywhere else.

Answer:

C

Explanation:

Same reason as the answer before mine, but the answer to your questionaire is C.

A reaction is first order with respect to reactant A and second order with respect to reactant B. Starting with [A] = 0.175 M and [B] = 0.00250 M, the reaction rate is 2.83 x 10−5 M.S−1. What is the rate constant k? Show your work.

Answers

Answer:

[tex]k=25.9M^{-2}s^{-1}[/tex]

Explanation:

Hello there!

In this case, since rate laws are written by considering the rate constant, concentration and specific orders of reaction of the concentration of the species contributing to the rate of reaction, we write:

[tex]r=k[A][B]^2[/tex]

Since it is first-order with respect to reactant A and second-order with respect to reactant B. In such a way, given the rate and concentrations of both A and B, the involved rate constant k turns out to be:

[tex]k=\frac{r}{[A][B]^2} \\\\k=\frac{2.83x10^{-5}M/s}{(0.175M)(0.00250M)^2}\\\\k=25.9M^{-2}s^{-1}[/tex]

Best regards!

What happens with electrons in a non-polar bond?
Brainliest!!!!!!!

Answers

Answer:

In a nonpolar covalent bond, the atoms share electrons equally with one another.

Explanation:

Nonpolar covalent bonds are a type of bond that occurs when two atoms share a pair of electrons with each other. These shared electrons glue two or more atoms together to form a molecule.

WHAT CAN BE USED TO REPLACE OIL? help 30POINTS!!!!! ASAP

Answers

Answer:

Melted butter

Explanation:

Answer:

Look below

Explanation:

The following may be substituted cup for cup for vegetable oil in baked goods:

Applesauce, preferably unsweetened.

Banana, ripe and mashed.

Butter, melted.

Cauliflower – unseasoned, cooked, and pureed.

Ghee.

Margarine, melted.

Mayonnaise.

Pumpkin, cooked and pureed.

Complete the missing information in the reactions. Then, label the reaction one of the following:
Alpha Decay
Electron Capture
Beta Decay
Positron Emission
.
14
N +
0
Type:
238
92
234
90
Th +
Type:
15
0
15
N +
7
Type:
8
0
32
15
Type:
105
Ag +
47
105
Pd
46
Type:
40
Type:
20
I
244
94 Pu -
Type: :

Answers

50 i’m not sure though sorry

Identify one factor represented in the diagram that is used to classify the ten types of clouds

Answers

Low clouds
Stratus clouds are uniform grayish clouds that often cover the sky. Usually no precipitation falls from stratus clouds, but they may drizzle. When a thick fog “lifts,” the resulting clouds are low stratus. Nimbostratus clouds form a dark gray, “wet” looking cloudy layer associated with continuously falling rain or snow. They often produce light to moderate precipitation.

Middle clouds
Clouds with the prefix “alto” are middle-level clouds that have bases at 6,500 to 23,000 feet up. Altocumulus clouds are made of water droplets and appear as gray, puffy masses, sometimes rolled out in parallel waves or bands. These clouds on a warm, humid summer morning often mean thunderstorms by late afternoon. Altostratus clouds, gray or blue-gray, are made up of ice crystals and water droplets. They usually cover the sky. In thinner areas of them, the sun may be dimly visible as a round disk. Altostratus clouds often form ahead of storms that produce continuous precipitation.

High clouds
Cirrus clouds are thin, wispy clouds blown by high winds into long streamers. They are considered “high clouds,” forming at more than 20,000 feet. They usually move across the sky from west to east and generally mean fair to pleasant weather. Cirrostratus, thin, sheetlike clouds that often cover the sky, are so thin the sun and moon can be seen through them. Cirrocumulus clouds appear as small, rounded white puffs. Small ripples in the cirrocumulus sometimes resemble the scales of a fish, creating what is sometimes called a “mackerel sky.”

Vertical clouds
Cumulus clouds are puffy and can look like floating cotton. The base of each is often flat and may be only 330 feet above ground. The top has rounded towers. When the top resembles a cauliflower head, it is called “cumulus congestus.” These grow upward and if they continue to grow vertically can develop into a giant cumulonimbus, a thunderstorm cloud, with dark bases no more than 1,000 feet above ground and extending to more than 39,000 feet. Tremendous energy is released by condensation of water vapor in a cumulonimbus. Lightning, thunder and violent tornadoes are associated with them.

Calculate the molecules in 9.78 moles of oxygen gas
Calculate the number of grams in 2.44e26 molecules of carbon dioxide, CO?
How many atoms are in 3.73e-2 moles of potassium
How many moles are in 11.8 grams of Barium?
Calculate the number of particles in 43.2 grams of N2O
The chemical formula for aspirin is C9H8O4. What is the mass in grams of 0.60 moles of aspirin

Answers

Answer:

i am quite unsure what you want me to answer but if you explain it to me w ould live to help

Explanation:

what is my name?
chetana
ikshya
grishma
bhumika
puja​

Answers

they're name of bunch of girls.

A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are blank with the law of conservation of mass because the mass of reactants blank the mass of products. with the law of conservation of mass because the mass of reactants A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are blank with the law of conservation of mass because the mass of reactants blank the mass of products. the mass of products.

Answers

Answer: The data are consistent with the law of conservation of mass because the mass of reactants equals the mass of products

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

Given: mass of sodium = 12.8 g

mass of chlorine = 19.6 g

mass of reactants = mass of sodium + mass of chlorine = 12.8 g + 19.6 g = 32.4 g

Mass of product = Mass of sodium chloride = 32.4 g

As mass of reactant = mass of products , Thus results are in accordance with the law of conservation of mass.​

The answer to this question

Answers

Answer:

C. seems to be the answer as ionic comlopunds have high melting points becuase of the anion cation bond which is not seen in covalent bonds that share electrons in polar arragnements.

Explanation:

Answer:

I think is B hopefully is

The liquid metal at room temperature (a) Mercury (b) Sodium (c) Magnesium (d) Silver

Answers

Answer:

(a) Mercury

Explanation:

Mercury with chemical symbol (Hg) is also regarded as " quicksilver". It is heavy and silvery in nature and belongs to d-block of the periodic table, it is metallic element and it is liquid at standard conditions of (temperature and pressure). It has Boiling point of about 356.7 °C with Atomic number of 80. It can molten above the temperature of ( −38.8 °C)

Read the temp what is it?

Answers

About 2.4 because there are 9 lines between the numbers

What is the H 2 : H2O molar ratio?

Answers

Answer:

The ratio of hydrogen atoms to oxygen atoms used to make water molecules is always 2:1, no matter how many water molecules are being made.

Explanation:

Can I find the state of Ca3N2 using the solubility rules? If so how because there is no Nitride in the solubility tables, I don't understand.

Answers

Answer:

The day I was in the shower and I will be there at remove the day I was in the shower and I will be there at remove the day to see if you have any questions please feel free to contacts and the day I was in the shower and I will be there at remove the day I was in the shower and I will be there at remove the days of the week are you

Explanation:

because the calcium is combine with the nitride so the total solubility will change forming Ca3N2

What is the answer to this?

Answers

the answer is A.

the scientist used mud and vinegar to make a model of the volcano.

Answer: B OR D

its one of those 2

PLEASE HELPPP WILL GIVE BRAINLIEST!!!

Answers

Answer:

placental mammals

Explanation:

Answer:

B) placental mammals

Explanation:

Name the gases that mostly compose the atmosphere.
O Argon and Carbon Dioxide
O Oxygen and Carbon Dioxide
Oxygen and Nitrogen
Carbon Dioxide and Nitrogen

Answers

Explanation:

Oxygen and Nitrogen. is the correct pair.

How many molecules of water are there in 10 lbs of water?

Answers

55.556

Explanation:

or something like that

__MgCl2 +
_Na3PO4 -->
NaCl
_Mg3(PO4)2 +
---
In the reaction above, how many moles of sodium chloride would be produced
if you started with 20 grams of magnesium chloride and excess sodium
phosphate? The equation is not balanced.
(If anyone can answer in depth if appreciate it )

Answers

Answer:

24.5 g of NaCl

Explanation:

We begin from the balanced reaction:

3MgCl₂ +   2Na₃PO₄  →    6NaCl   +  Mg₃(PO₄)₂

If the sodium phosphate is in excess, then the limting reagent is the magnessium chloride.

We convert mass to moles:

20 g . 1mol / 95.2g = 0.210 moles.

3 moles of MgCl₂ can produce 6 moles of NaCl

0.210 moles of salt, may produce (0.210 . 6) /3 = 0.420 moles

Ratio of reactant is twice the product

We convert the moles to mass:

0.420 mol .  58.45 g/mol = 24.5 g

6th grade science plz help Major grade Need help with 4,5, and 6

Answers

4=population, 5 and 6 are ecosystem

Help. I’ll give brainliest.

Answers

Answer:

obviously it is 6 km cause that's the longest length

Answer:

the answer is A

Explanation:

Its A because 6km is the longest and 1Km = 1000 meters

The hot liquid substance that is inside the earth is referred to as lava or magma?

Answers

Answer:

magma

Explanation:

i did a test on it

The hot liquid substance that is inside the Earth is referred to as magma.

If this is incorrect, please, don't refrain to tell me. Thank you.

Calculate the volume of 150kg of chlorine gas at room temperature and pressure. The volume of one mole of gas at room temperature and pressure is 24.0dm^3. Relative formula mass (Mr): Cl2=71​

Answers

Answer:

Given mass 150 kg= 150000 gram

molar mass 71 gram

number of moles = given mass/molar mass

= 2112.76 moles

1 mole = 24 Dm³

2112.76 mole =24×2112.76= 50706.24 Dm³

The volume of the mole of gas at room temperature and pressure is 50,704.08dm³

We need to first calculate the number of moles of Chlorine gas (Cl₂)

Number of moles = Mass/Molar mass

Given the following parameters

The molar mass of Cl₂ = 71g/mol

Mass of chlorine gas = 150kg = 150,000g

Get the number of moles

[tex]n=\frac{150,000}{71}\\n=2,112.67moles\\[/tex]

Given that volume of 1 mole at STP = 24.0dm³

2112.67 moles = x

Get the volume of the chlorine gas at STP.

Volume of Cl₂ at STP = 24 × 2112.67

Volume of Cl₂ at STP = 50,704.08dm³

Hence the volume of the mole of gas at room temperature and pressure is 50,704.08dm³

Learn more here: https://brainly.com/question/3578153

PLZZZZZZZZ HELP PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ PLZ PLZ PLZZZZZZZ these are satellite images taken of the same area in 1986 and in 2020 what can these images be used to monitor

Answers

C. How land use has changed over time.

Answer:

I believe it is how land use changed over time

Explanation:

The images only show us the labels of communities and farm land/ forests. There is no evidence to support that this map would be monitoring water quality, pollution, etc. The only visible change is the change in land.

1. What pressure would be exerted by 46.0grams of hydrogen gas placed into a 3.00 L container at

25°C?

Answers

Answer:

187.34 atm

Explanation:

From the question,

PV = nRT.................. Equation 1

Where P = Pressure, V = Volume, n = number of mole, R = molar gas constant, T = Temperature.

make P the subject of the equation

P = nRT/V.............. Equation 2

n = mass(m)/molar mass(m')

n = m/m'............... Equation 3

Substitute equation 3 into equation 2

P = (m/m')RT/V............ Equation 4

Given: m = 46 g, T = 25°C = (25+273) = 298 K, V = 3.00 L

Constant: m' = 2 g/mol, R = 0.082 atmL/K.mol

Substitute these values into equation 4

P = (46/2)(0.082×298)/3

P = (23×0.082×298)/3

P = 187.34 atm

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the box and whisker plot below shows the volunteer service hours performed by students at indian trail middle school last summer During the month of September, the following transactions occurred. The applicable sales tax rate is 6%. Sept. 2 Sold merchandise on account to Sam Larson, $1,400, plus sales tax. 7 Sold merchandise on account to David Mitchell, $1,900, plus sales tax. 12 Issued credit memorandum to Sam Larson for $689, including sales tax of $39. 22 Sold merchandise on account to Matt Feustal, $500, plus sales tax. 28 Sold merchandise on account to Ana Cardona, $850, plus sales tax.Enter the transactions in the general journal. In the giver Which of the following is NOT a ritual that citizens participate in?A.the telling of dreamsB.the sharing of feelingsC.the celebration of birthdays Exercise 8-9 Petty cash fund with an overage LO P2 EcoMart establishes a $1,050 petty cash fund on May 2. On May 30, the fund shows $326 in cash along with receipts for the following expenditures: transportation-in, $120; postage expenses, $369; and miscellaneous expenses, $240. The petty cashier could not account for a $5 overage in the fund. The company uses the perpetual system in accounting for merchandise inventory. Prepare the (1) May 2 entry to establish the fund, (2) May 30 entry to reimburse the fund [Hint: Credit Cash Over and Short for $5 and credit Cash for $724], and (3) June 1 entry to increase the fund to $1,200. The question Im trying to figure out is What is y? Write a journal entry on the following prompt. Imagine you could be a star in any sport you wanted. 1) Which sport would you choose and why? 2) What would you have to do for training? Will Mark Brainliest. Freemore Company has the following sales budget for the last six months of 2018: July $206,000 October $181,000 August 168,000 November 203,000 September 209,000 December 185,000 Sales are immediately due, however the cash collection of sales, historically, has been as follows: 55% of sales collected in the month of sale, 35% of sales collected in the month following the sale, 7% of sales collected in the second month following the sale, and 3% of sales are uncollectible. Cash collections for September are ________. $126,710 $199,930 $188,170 $173,750 How can we mark a person the Brainiest in Web? I am unable to find the option for marking the brainiest. Pls help Please help ill give brainly WHAT DO YOU CALL A RABBIT WITH FLEAS???????? 9. Which diagram in Figure 1.19 represents single type of a human tissue?(3) Kidney(4) Digestive System(1)Neuron(2) Muscle Which prompt would be best addressed with a cause-and-effectstructure?A. How does your life differ from the life of a child in colonial times? How is it the same? Consider education, family, communication, transportation, and technology in yourresponse.B. In the American Revolution, the Americans had a smallerarmy with less training than the British, yet they were ableto win the war and create an independent United States.What factors best explain the outcome of the war?C. How has communication changed over the past 700years? Consider communication methods, communicating over long distances, and communicating to a large audience.D. Research the history and development of aviation. Be sure to include major milestones, from the Wright brothers' first experiments to the current space program. Transformation Geometry freaking help, its due tmrr how do people show inner strength? masculine to feminine 1. nephew2. gentleman/lord3. peacock Can a moon experience gravitational pull from something other than a planet ? Which of the following is the solution (x,y) of the system of equations x-2y = 2 and -x+2y = 2 Can someone help me with this paper please NEED HELP ASAP!!!!!!!!!!!!!! a) For Well A, provide a cross-section sketch that shows (i) ground elevation, (ii) casing height, (iii) depth towater table, (iv) sampling depth, (v) elevation of the well top of casing, (vi) water table elevation, (vii) elevationhead of the water sampled for bromide, and (viii) pressure head of the water sampled for bromide. Label each ofthese distances with the above phrases, plus a unique variable.b) Calculate the following for each well: (i) elevation of the well top of casing, (ii) water table elevation,(iii) sampling port elevation, (iv) elevation head of the water sampled for bromide, and (v) pressure head of thewater sampled for bromide. Use sea level as your vertical datum. Write out all calculations (including equationswith variables) for Well A.