Suppose that the prevalence of Lyme Disease in Jackson, Mississippi is p = 0.0005 and that Dr. Robert Smalls has n = 800 patients.
How many of Dr. Smalls' patients are expected to have Lyme Disease?

Answer:

I think the first option is the answer

Answer:

I used to know this stuff but I don't remember it anymore

Answer:

1. atom

2. different

3. compounds

4. joined

5. separated

--

1. NT

2. ST

3. AT

--

1. subatomic

2. negative

3. Protons

4. neutrons

5. Nucleus

6. Rutherford

7. positive

8. electrons

--

1. T

2. T

3. F

4. T

Explanation:

look at the answer

The gases produced by running electricity through water are not the same particles as the gas produced when we heated the water. This is because gases have different densities.

Electrolysis is the process of passing an electric current through a solution or a molten form of a substance that is decomposed by the electric current passing through.

Electrolysis can be used to change the composition of a compound.

For example, the electrolysis of water results in the splitting of water molecules into their constituent elements with the formation of hydrogen gas and oxygen gas respectively.

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Answer:

10,765 g As

Explanation:

Answer:

1) faster

2) slower

Explanation:

Answer:

faster

Explanation:

Answer:

204,375 mL.

Explanation:

327 mL - 3.2 M

x mL - 2 M

x= (2 M x 327 mL) /3.2 M

x= 204,375 mL.

Answer:

1)Oxygen atoms have 8 electrons and the shell structure is 2.6. The ground state electron configuration of ground state gaseous neutral oxygen is [He]. 2s2. 2p4 and the term symbol is 3P2.

Explanation:

2)If the element were to become excited, the electron could occupy an infinite number of orbitals. However, in most texts the example will be the next available one. So for oxygen, it might look like this: 1s22s22p33s1 - where the valence electron now occupies the 3s orbital in an excited (i.e. not ground) state

The heat was required for his temperature change  26752 J.

given that :

volume : 100 mL

The initial temperature = 23 °C

The final temperature = 87 °C

ΔT = 87  °C - 23  °C = 64 °C

density = mass / volume

mass = density × volume

         = 1 × 100

         = 100 g

the specific heat expression is given as :

Q = m c ΔT

where,

specific heat capacity , c = 4.18 J/g °C

mass of water , m = 100 g

change in temperature , ΔT = 64 °C

Q = 100 × 4.18 × 64

Q = 26752 J

Thus, the initial temperature of 100.0 ml of water was 23 °C . the water was then heated to 87 °C .heat (in j) was required for this temperature change is 26752 J.

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The 13.5 g of oxygen combines with 50 g of tin. if the formula of compound a is SnO, the formula of compound b is SnO₂.

given that :

The mass of the oxygen = 13.5 g

The mass of the tin = 50 g

molar mass of the oxygen = 16 g/mol

molar mass of the tin = 118.7 g/mol

moles of the oxygen = mass / molar mass

                                   = 13.5 / 16

                                    = 0.84

moles of the tin = mass / molar mass

                          = 50 / 118.7

                           = 0.42

dividing by the smallest one we get :

O = 0.84 / 0.42 = 2

Sn = 0.42 / 0.42 = 1

The formula for the compound is SnO₂.

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Answer:

A - dendrites

B - cell body

C - axon terminal

D - myelin sheath

E - nucleus

Hope that helps.

A-dendrite

B-cell body

C-axon terminal

D-axon

E-nucleus

Answer:

Infrastructure of development is the construction and improvement of foundational services with the goal of sparking economic growth and improvements in quality of life

If glucose is the only energy source for animals, then the carbon dioxide exhaled is generated through the reactions of the citric acid cycle. Specifically, during the citric acid cycle, acetyl-CoA derived from the breakdown of glucose enters the cycle and undergoes a series of reactions that produce carbon dioxide as a byproduct. Therefore, all of the carbon dioxide exhaled by animals is generated by the reactions of the citric acid cycle.

When glucose is the only energy source, approximately two-thirds of the carbon dioxide exhaled by animals is generated by the reactions of the citric acid cycle. This is because glucose is first broken down into two molecules of pyruvate during glycolysis, and then each pyruvate is converted into acetyl-CoA, which enters the citric acid cycle. For each glucose molecule, the citric acid cycle produces six molecules of carbon dioxide, while glycolysis and pyruvate decarboxylation generate two. Therefore, 6 out of the total 8 carbon dioxide molecules (6/8 = 3/4 or 75%) come from the citric acid cycle.

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Exposure route can be defined as a way by means of which a person can come in contact with the hazardous chemicals, this can be prevented by wearing personal protective equipments.

Personal protective equipment is a protective clothing which is worn to protect the wearer's body from hazard or injury.The hazards which can be addressed by the use of personal protective equipment are physical,chemical and bio hazards.

It imposes a barrier between the user and the working environment.The main purpose of personal protective equipment is to reduce exposure of employees to the hazards.

It has a limitation that it does not eliminate the hazard and may lead to harm to the employee if the equipment is damaged.

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The type of scientific model the flow chart represents is the Conceptual model.

A scientific model is a physical and mathematical and conceptual representation of a system of ideas, events, or processes. Scientists seek to identify and understand patterns in our world by using scientific knowledge to provide explanations so that patterns can be predicted.

While it's easy to outline the steps of the scientific method flowcharts are helpful because they provide options at each point in the decision-making process. It shows you what to do next and makes it easier to visualize and plan your experiments. Molecular models are physical models of atomic systems that represent molecules and their processes. They play an important role in understanding chemistry and in formulating and testing hypotheses.

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CH3OCH3 = methoxymethane

trivial name : Dimethyl ether

CH3CH2OCH3 = methoxy ethane

trivial name: ethyl methyl ether.

CH3CH2OCH2CH3 = Ethoxyethane

trivial name = Diethyl ether

Not properly sure about the last one.

To find IUPAC name find the longest single bond carbon chain.

The mass of the nitrogen gas is approximately 949 grams.

The mass of the nitrogen gas can be calculated using the ideal gas law, which states:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in Kelvin. R is the ideal gas constant ( 0.08206 Latm/molK )

Given thw volume of the Nitrogen gas to be 759l, at ST, temperature equals 273.15 K and pressure 1 atm.

we can rearrange the ideal gas law to solve for n:

PV = nRT

n = PV / RT

Plug in the values

n = ( 1 atm × 759 L ) / ( 0.08206 Latm/molK × 273.15 K )

n = 33.86 mol

Finally, we can calculate the mass of the nitrogen gas using the molar mass of nitrogen:

m = n × M

Where M = 28.02 g/mol is the molar mass of nitrogen.

m = 33.86 mol × 28.02 g/mol

m = 949 g

Therefore, the mass is 949 g.

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Answer:

a. 1810mL

Explanation:

When conditions for a gas change under constant pressure (and the number of molecules doesn't change), it follows Charles' Law:

\(\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\)  where the temperatures must be measured in Kelvin

To convert from Celsius to Kelvin, add 273, or use the equation:  \(T_C+273=T_K\)

For this problem, one must also recall that standard temperature is 0°C (or 273K).

So, \(T_1 = 273[K]\), and \(T_2 = (49.4+273)[K]=322.4[K]\).

\(\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\)

\(\dfrac{(1532.7[mL])}{(273[K])}=\dfrac{V_2}{(322.4[K])}\)

\(\dfrac{(1532.7[mL])}{(273[K\!\!\!\!\!{-}])}(322.4[K\!\!\!\!\!{-}] )=\dfrac{V_2}{(322.4[K]\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{----})}(322.4[K]\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{----})\)

\(1810.04571428[mL]=V_2\)

Adjusting for significant figures, this gives \(V_2=1810[mL]\)

Answer:

it is D. Reactant

Explanation:

Answer:

D

Explanation:

A chemical reaction is a process in which one or more substances, also called reactants.

In mass-volume and volume-mass calculations all gases are considered to be at standard temperature.

what is standard temperature?

Standard sets of settings for experimental measurements are produced at standard temperatures and pressures (STP), allowing comparisons to be made between various sets of data. The most popular standards, though not universally acknowledged, are those of the National Institute of Standards and Technology (NIST) and the International Union of Pure and Applied Chemistry (IUPAC). For their common reference conditions, other organizations have developed a number of different alternative definitions.

In 1982, the IUPAC modified its definition of standard pressure and temperature for chemistry.

Before 1982, the standard temperature and pressure (STP) were 273.15 K (0 °C, 32 °F) and exactly 1 atm, respectively (101.325 kPa).

STP has been defined since 1982 as having a temperature of 273.15 K (0 °C,32F

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Answer:

3 ft is the most accurate

69 mmHg pressure is exerted by oxygen if 40% of the gas pressure is exerted by the oxygen gas.

Pressure is defined to be the amount of force exerted per area

40% of pressure is exerted by oxygen gas.

So, 60% of pressure will be exerted by carbon dioxide gas.

60% of 115 mmHg = 69 mmHg

Hence, 69 mmHg pressure is exerted by oxygen if 40% of the gas pressure is exerted by the oxygen gas.

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Answer:

Explanation:

The percentage error of a certain measurement can be found by using the formula

\(P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ \)

From the question

actual density = 7.80 g/cm³

error = 7.30 - 7.80 = 0.5

We have

\(p(\%) = \frac{0.5}{7.8} \times 100 \\ = 6.410256...\)

We have the final answer as

Hope this helps you

To solve this question we need to use the combined gas law:

sufix 1 reffears to the initial state and sufix 2 reffears to the final state. P is pressure, V volume and T temperature (in Kelvin). They are asking for the pressure at the final state (P2) and they give the initial conditions: P1= 1atm, V1=1L T1=25°C=298K and the final temperature T2=1000°C= 1273 K. They alse say that the Volume is fixed so V2=V1=1L. then we just have to substitute the values into the eqaution:

Then solve P2. P2 = 4.272 atm

The chemical formulas for these compounds:
a. Tin(II) hydroxide: Sn(OH)₂
b. Barium fluoride: BaF₂
c. Tetraiodide nonoxide: I₄O₉
d. Iron(III) oxalate: Fe₂(C₂O₄)₃

A set of guidelines used to produce systematic names for chemical compounds is known as a chemical nomenclature. The International Union of Pure and Applied Chemistry (IUPAC) developed and produced the nomenclature that is most frequently used globally.

The Red Book and Blue Book, respectively, are two publications that contain the IUPAC's rules for naming organic and inorganic compounds. A fourth book, the Gold Book, defines many of the technical terms used in chemistry, while a third, the Green Book, advises the use of symbols for physical quantities (in conjunction with the IUPAP). There are comparable compendia for clinical chemistry (the Silver Book), analytical chemistry (the Orange Book), macromolecular chemistry (the Purple Book), and biochemistry (the White Book, in association with the IUBMB).

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The chemical formulas for each of the following compounds:

a. Tin(II) hydroxide:
Tin(II) indicates that tin has a charge of +2. Hydroxide has a charge of -1. To balance the charges, we need two hydroxide ions for each tin ion.
Chemical formula: Sn(OH)₂

b. Barium fluoride:
Barium has a charge of +2, while fluoride has a charge of -1. To balance the charges, we need two fluoride ions for each barium ion.
Chemical formula: BaF₂

c. Tetraiodide nonoxide:
Tetra- means 4 and nona- means 9. So, there are 4 iodide atoms and 9 oxide atoms in the compound.
Chemical formula: I₄O₉

d. Iron(III) oxalate:
Iron(III) indicates that iron has a charge of +3. Oxalate is a polyatomic ion with a charge of -2. To balance the charges, we need two iron ions and three oxalate ions.
Chemical formula: Fe₂(C₂O₄)₃

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A person weighing around 62 kg can jump from a height of 0.329 metres without breaking their legs.

Potential energy present in a jumper from height h. = m g h  

which, when the individual strikes the ground, entirely transforms into kinetic energy. Now, the human can only absorb a maximum of 200 J of energy.

m = 62 kg

g = 9.8 m/s²

⇒ m g h = 200 J

⇒ h = 200 J / (62 kg × 9.8 m/s²) = 0.329 m

Therefore, a person can only fall from a height of 0.30 m safely and without breaking both of their legs.

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Answer:

for more details are in the pic

Molecular solid have covalently bonded atoms in it whereas Ionic solid have electronic bonds between its atoms..

We employ the octet rule, which states that all atoms in a compound are expected to comply by, to confirm the accuracy of any chemical structure. Every atom in the carbon IV oxide model precisely complies with the octet rule. The valence shell of each atom in the molecule is surrounded by eight electrons. We can therefore conclude that this structure is accurate given the total number of bonds and electrons, as well as the fact that CO₂ has sixteen valence electrons.

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"ionic character" is not a precise one and can vary depending on the definition and criteria used.

To rank the compounds in order of decreasing ionic character, we need to consider the electronegativity difference between the cation and anion in each compound. The greater the difference in electronegativity, the more ionic character the compound will have.

The electronegativity of potassium (K) is 0.82 and the electronegativity of fluorine (F) is 3.98. Therefore, the electronegativity difference between K and F is:

3.98 - 0.82 = 3.16

The electronegativity of magnesium (Mg) is 1.31 and the electronegativity of oxygen (O) is 3.44. Therefore, the electronegativity difference between Mg and O is:

3.44 - 1.31 = 2.13

The electronegativity of lithium (Li) is 0.98 and the electronegativity of iodine (I) is 2.66. Therefore, the electronegativity difference between Li and I is:

2.66 - 0.98 = 1.68

Therefore, we can rank the compounds in order of decreasing ionic character as follows:

KF (largest electronegativity difference)

MgO

LiI (smallest electronegativity difference)

Therefore, the correct order is:

KF

MgO

LiI

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