how did your estimated poputation size
compare with the actual population size

Answers

Answer 1

Answer:

HE coracle—as I had ample reason to know before I was done with her—was a very safe boat for a person of my height and weight, both buoyant and clever in a seaway; but she was the most cross-grained, lop-sided craft to manage. Do as you pleased, she always made more leeway than anything else, and turning round and round was the manoeuvre she was best at. Even Ben Gunn himself has admitted that she was "queer to handle till you knew her way."

Explanation:


Related Questions

The sun is 93 million miles from the earth approximately how many years would it take to travel from earth to the sun if a person flew in a spaceship at 55 miles an hour?

(Hint:begin by dividing the distance by the speed to determine the number of hours it would take. Round your answers the the nearest whole number.)

Answers

Answer:

it would take 2 years

Explanation:

93/55=1.69--->1.70------>2

how many grams are in one mole of CH3CO2H ?

Answers

Answer: 60.2g

Explanation:

One mole acetic acid weighs 60.2g

Whoever answers I’ll give brainliest!

Answers

It would be 13.5 ml so d

How many significant figures are there in each of the following measured values?
a. 6.002 cm
b. 0.0020 m
c. 10.0500

Answers

Answer:

6)

a). 5.6 × 10⁵

b) 3.34 × 10⁴

c) 4.12 × 10_⁴

The pOH a solution of 0.04 M HCl is:________
a. 1.4
b. 10
c. 12.6
d. 13.6
e. The pOH cannot be determined

Answers

pH of 0.04 M HCl is

pH = -log 0.04 =1.4
pOH = 14-pH = 12.6

hence the answer is C 12.6

The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14. Thus the pOH of 0.04 M HCl is  12.6. pH is a unitless quantity. The correct option is option C.

What is pH?

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7.

The concentration of HCl is 0.04 M

Concentration of H₃O⁺=0.04 M

Mathematically,

pH=-log[H⁺]

Substituting the values

pH=-log[0.04 M]

     = 1.4

pOH = 14-pH = 12.6

Thus  the pOH of 0.04 M HCl is  12.6. The correct option is option C.

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Calculate the mass of 1 molecule of water
with step

Answers

Molecular Mass of water:-

[tex]\\ \sf\longmapsto H_2O[/tex]

[tex]\\ \sf\longmapsto 2(1u)+16u[/tex]

[tex]\\ \sf\longmapsto 2u+16u[/tex]

[tex]\\ \sf\longmapsto 18u[/tex]

[tex]\\ \sf\longmapsto 18g[/tex]

1mole of water weighs 18g

We know

[tex]\\ \sf\longmapsto 1mol=6.023\times 10^23molecules[/tex]

Mass of one molecule:-

[tex]\\ \sf\longmapsto \dfrac{18}{6.023\times 10^23}[/tex]

[tex]\\ \sf\longmapsto 2.98\times 10^24g[/tex]

If you change the number of neutrons in an atom, you will also change its -
charge
element.
o
number
d
isotope.

Answers

isotope… without changing electrons/atomic nimber, the atom remains the same changing neutron will cause it to become isotope

A sample of solid X is carefully weighed and put inside a vented flask. The flask is heated until oxygen gas starts being produced. After no more oxygen gas is produced, the contents of the flask are removed and weighed, and from the decrease in weight the value of O may be calculated. physical or chemical

Answers

Answer:

I honestly have no  clue

Explanation:

An atom has 15 protons and 14 Neutrons. What is the atomic number of this atom?

Answers

Answer:

Silicon

Explanation:

Therefore the isotope with 14 protons and 15 neutrons is Silicon-29.

An atom has 15 protons and 14 Neutrons. The atomic number of this atom is 14 and the element is silicon.

What is the atomic number?

The atomic number of an element is its total number of protons or the total number of electrons. The atomic number is written down the element. It can be calculated by knowing the numbers of protons and electrons.

The element here is silicon, whose number of protons, electrons, and neutrons are equal, which is 14. These are the charged particles that are present in the atoms of the element.

The number of band protons is equal to an element. The atomic number will be its number of protons. The isotope with 14 protons and 15 neutrons is Silicon-29.

Thus, the atomic number of the element is 14 if it has 15 protons and 14 Neutrons. The element is silicon.

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Aqueous aluminium bromide and solid zinc are formed by the reaction of solid aluminum and aqueous zinc bromide. Write a balanced chemical equation for this reaction.​

Answers

Answer:

3 ZnBr2(aq) + 2Al (s) ====>2AlBr3 (aq) + 3 Zn(s),

What property is not used to separate a mixture ?

Answers

Answer:

Conductivity

Explanation:

What is the formula of the compound in which the atom combining ratios are:
carbon : hydrogen : chlorine = 2:5:1
Enter elements in the order given:

Please help me with this

Answers

Answer: Carbon, hydrogen oxygen

Explanation:C2H5OH

What is the mass number for Iron-58?

Answers

Answer:

58

Explanation:

mass number of iron 58 is 58

I will give brainliest if you show work and answer correctly

1. Calculate the slope of each line using the points given. Graph each of the lines and determine if each is a positive or negative relationship. If you use graph paper, please take a photo and upload to your document.


2. Which graph(s) can not be a true measure of density? Why?




a. (24cm3, 6.0g), (12cm3, 24g)


b. (5.0cm3, 6.0g), (13cm3, 15g)


c. (5.0cm3, 4.0g), (25cm3, 24g)


d. (24 cm 3 , 8.0 g), (12 cm 3 , 22 g)

Answers

Answer:

https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:linear-equations-graphs/x2f8bb11595b61c86:slope/v/graph-from-point-slope. Answer 1

Explanation:

I only know the first one

Bella wants to know which mode of transportation is the fastest for getting from her home to the grocery store. She can drive her car, ride her bike, walk, or charter a helicopter. What is the Independent, dependent, controlled variables and hypothesis

Answers

Answer

 I think a helicopter would be fastest, just sayin.

Explanation:

Rolls of foil are 300mm wide and 2.020mm thick. (The density of foil is 2.7 g/cm^3). What maximum length of foil can be made from 1.40 kg of foil?

Answers

Answer:  8556 mm, or 855.6 cm (8560 mm to 3 sig figs)

Explanation:  Convert mm to cm by dividing by 10 (1cm/10mm)

Find the area of the foil face in cm^2 (30cm*0.2020cm) = 0.606 cm^2

Calculate the volume occupied by 1.40 kg of foil in cm^3.  1.40kg = 1400g

1.400g/(2.7 g/cm^3) = 518.5 cm^3 for 1.40 kg Au

   Volume = Area (of the face) * Length  

We want Length:

Length = Volume/Area

L = (518.5 cm^3/0.606 cm^2)

L = 855.6 cm (8556 mm)  Round to 3 sig figs (856 cm and 8560 mm)

Which statement best describes the light that will cause emission of electrons from a given metal through the photoelectric effect?
light with a low enough intensity
light with a high enough frequency
light with a high enough intensity
light with a low enough frequency

Answers

Answer:

b

Explanation:

edge 2021

The best describes the light that will cause emission of electrons from a given metal through the photoelectric effect is " light with a high enough frequency. "

What is photoelectric effect?

When electromagnetic radiation, like light, strikes a substance, the photoelectric effect would be the generation of electrons.

What is electrons?

The smallest atom-forming particle is an electron, which has negatively charged.

The photoelectric effect would be a phenomenon where electrically charged particles were released from or contained within a substance as electromagnetic radiation will be absorbed. The effect is often referred to as the emission of electrons from such a metal plate when light strikes it.

Therefore, the correct answer will be option (B).

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Which element is not an alkali metal?

Answers

Hello!

Answer:

Hydrogen

Explanation:

Hydrogen (H) has one electron in its outermost shell, but it is not classed as an alkali metal since it is not a metal but a gas at room temperature.

Answer:

hydrogen, lithium, sodium element are not alkali metal

Equal masses of carbon dioxide (CO2) and oxygen (O2) are mixed. What is the mole
fraction of oxygen in this mixture?
A) 0.4211
B)0.2500
C)0.7500
D) 0.661

Answers

The mole fraction of oxygen in this mixture is = 0.5789  which is not listed  in the options. while the mole fraction of carbon dioxide = 0.4211 ( A )

Given that :

Mass of carbon dioxide = mass of oxygen

lets assume the given mass  = x

first step : determine the moles of CO₂ and O₂

moles of CO₂ = mass / molar mass of CO₂

                       = x / 44

moles of O₂  =  mass / molar mass of O2

                     = x / 32

mole fraction of O₂ = moles of O₂ / ( Total moles in the mixture )

                                   = [tex]\frac{x}{32} / ( \frac{x}{44} + \frac{x}{32} )[/tex]

                                   = [tex]\frac{44*32*(x)}{32 * 76 *(x)}[/tex]  = 0.5789

While the mole fraction of Carbon dioxide = 1 - 0.5789 = 0.4211

hence the mole fraction of oxygen in this mixture = 0.5789 while the mole fraction of Carbon dioxide = 0.4211

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What's you favorite food

Answers

Answer:

all of it

Explanation:

my favourite food is pasta.

If 35.6 g of nitrogen with 7.69 g of hydrogen are combined in a closed system, what mass of ammonia will be produced?

Answers

Consider the balanced reaction,

N₂ + 3 H₂   ⇒   2 NH₃

which says that 1 mole of nitrogen gas combines with 3 moles of hydrogen gas to produce 2 moles of ammonia gas.

Look up the molar masses of each element:

• N has a molar mass of 14.007 g/mol

• H has a molar mass of 1.008 g/mol

Then the reaction starts with

• (35.6 g) (1/28.014 mol/g) ≈ 1.27 mol N₂

• (7.69 g) (1/2.016 mol/g) ≈ 3.81 mol H₂

which means we have nearly exactly 3 times as many moles of H₂ as we do of N₂. These will combine to make 2 * 1.27 = 2.54 moles of NH₃, which has a molar mass of 17.031 g/mol, and so the reaction produces

(2.54 mol) (17.031 g/mol) ≈ 43.3 g NH₃

Which of the following is a physical change?

A. Water reacting with potassium

B. Alcohol evaporating

C. Water splitting into hydrogen and oxygen

D. Alcohol burning

Answers

Explanation:

Alcohol burning

hope this helps you

alcohol burning , it changes its state

what is the need to refer to books before using appreciable amount of chemicals​

Answers

Answer:

Prudent execution of experiments requires not only sound judgment and an accurate assessment of the risks involved in the laboratory, but also the selection of appropriate work practices to reduce risk and protect the health and safety of trained laboratory personnel as well as the public and the environment. Chapter 4 provides specific guidelines for evaluating the hazards and assessing the risks associated with laboratory chemicals, equipment, and operations. Chapter 5 demonstrates how to control those risks when managing the inventory of chemicals in the laboratory. The use of the protocols outlined in Chapter 4 in carefully planned experiments is the subject of this chapter.

Explanation:

why is water a compound but hydrogen an element​

Answers

Compounds are made of more than one element hence water is made of 2 Hydrogen and one Oxygen, but nacent Hydrogen is single hence it is an element.

Water is a compound because simply it’s made out of water molecules. It consists of one oxygen atom binding with two hydrogen atoms. There no such thing as a water atom!

Hydrogen is an element because it’s composed of a single proton and single electron. It is the MOST abundant element.

When 47.1 J of heat is added to 14.0 g of a liquid, its temperature rises by 1.80 ∘C. What is the heat capacity of the liquid?

Answers

Answer:

[tex]\boxed {\boxed {\sf 1.87 \J/g \textdegree C}}[/tex]

Explanation:

We are asked to find the specific heat capacity of a liquid. We are given the heat added, the mass, and the change in temperature, so we will use the following formula.

[tex]q= mc\Delta T[/tex]

The heat added (q) is 47.1 Joules. The mass (m) of the liquid is 14.0 grams. The specific heat (c) is unknown. The change in temperature (ΔT) is 1.80 °C.

q= 47.1 J m= 14.0 g ΔT= 1.80 °C

Substitute these values into the formula.

[tex]47.1 \ J = (14.0 \ g) * c * (1.80 \textdegree C)[/tex]

Multiply the 2 numbers in parentheses on the right side of the equation.

[tex]47.1 \ J = (14.0 \ g * 1.80 \textdegree C)*c[/tex]

[tex]47.1 \ J = (25.2 \ g*\textdegree C) *c[/tex]

We are solving for the heat capacity of the liquid, so we must isolate the variable c. It is being multiplied by 25.2 grams * degrees Celsius. The inverse operation of multiplication is division, so we divide both sides of the equation by (25.2 g * °C).

[tex]\frac {47.1 \ J}{(25.2 g *\textdegree C)} = \frac {(25.2 g *\textdegree C)*c}{{(25.2 g *\textdegree C)}}[/tex]

[tex]\frac {47.1 \ J}{(25.2 g *\textdegree C)} =c[/tex]

[tex]1.869047619 \ J/g *\textdegree C = c[/tex]

The original measurements of heat, mass, and temperature all have 3 significant figures, so our answer must have the same. For the number we found that is the hundredth place. The 9 in the thousandth place to the right tells us to round the 6 up to a 7.

[tex]1.87 \ J/ g * \textdegree C =c[/tex]

The heat capacity of the liquid is approximately 1.87 J/g°C.

Is sand a element, compound or a mixture?

Answers

Answer:s  its  a mixture

Explanation:

it would be a mixture:)))

A particular medication dosage is 45.0mg/kg of body weight. what is the mass in mg of the medication a child weighing 33.5lb

Answers

Answer:

Dosage of drugs is dependent on the body weight of a person. The route of administration also plays crucial role in determining the dosage of the drugs. The calculation of dosage of drugs based on the bodyweight is calculated by the multiplication of body weight and dosage.

Explanation:

The medication dosage is given as 45mg/kg. To calculate the mass of dosage a child will require of body weight 33.5lb will be:

[tex]\text{Dose} = \text{Body weight} \times \text{Dosage}[/tex]  

Therefore, converting the pounds to kg, it will be:

[tex]33.5\;\text{lb} = 15.19\;\text{ kg} \;(1\;\text{lb} = 0.4\;\text{ kg})[/tex]

Thus, dose of medication required will be:

[tex]\text{Dose} = 15.19 \: \times \: 45[/tex]

[tex]\text { Dose} = 683.8\: \text { mg}[/tex]

13. Find the total number of atoms present in the following molecules. a. 5 H₂O b. Zn Cl₂

Please ​

Answers

Answer:

5H²O= 23

ZnCl²=135

have a great day

13. Find the total number of atoms present in the following molecules.
a. 5 H₂O
b. Zn Cl₂

If 125 cal of heat is applied to a 60.0-g piece of copper at 24.0 °C, what will the final temperature be? The
specific heat of copper is 0.0920 cal/(g. "C)

Answers

Answer:

id answer but you only put the points at "5"

Explanation:

soooo......sorry.....

[tex]x^{2} blelllelelele[/tex]

not

hehe

The energy of the universe is zero and the mass of the earth is also zero. True or false and why. please I need help​

Answers

Answer:

false

Explanation:

false

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