An alpha particle (mass = 6.6X10⁻²⁴ g) emitted by a radium isotope travels at 3.4X10⁷ ± 0.1X10⁷ mi/h.
(b) What is the uncertainty in its position?

Answer:

16

Explanation:

you can line up the fareinheit and celsius and see that the celsius is 16

Answer:

15 and 290 for the first question, if it drops 30 it will get to be 30 f, -0 c and 273 k

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The concentration of the HF solution is  0.03.

We know that the concentration has to do with the amount of the substance that is present in the system. We know that what we have is an acid hence we can only talk about the concentration of the acid if we can obtain the amount of the hydrogen ion.

We know that the acid is defined as any substance in which there is the presence of the hydrogen ion is what we call and acid. Since the hydrogen fluoride does have the hydrogen, we can say that the substance that we are dealing with here is an acid.

Thus;

pH = 14 - pOH

pOH = hydroxide ion concentration

pH = hydrogen ion concentration

pH = 14 - 12.5

= 1.5

[HF]  = Antilog (-1.5)

= 0.03

The acid would have a concentration of  0.03.

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Answer:

8 electrons

Explanation:

Magnesium is present on group 2.

It has 2 valence electrons.

Electronic configuration of magnesium:

Mg₁₂ = 1s² 2s² 2p⁶ 3s²

1st energy level contain 2 electrons.(1s²)

2nd energy  level contain 8 electrons. (2s² 2p⁶)

3rd energy level contain 2 electrons. (3s²)

3rs energy level of magnesium is called valence shell. It contain two valance electrons. Magnesium can easily donate its two valance electrons and get stable electronic configuration.

It react with halogens and form salt. For example,

Mg + Cl₂   →   MgCl₂

The class of the reaction between magnesium metal and oxygen in the air, which results in the formation of magnesium oxide, is oxidation.

Oxidation is a chemical reaction that involves the loss of electrons or an increase in oxidation state. In this case, magnesium metal (Mg) undergoes oxidation as it reacts with oxygen (O_2) in the air. The magnesium atoms lose electrons, transferring them to the oxygen atoms, resulting in the formation of magnesium oxide (MgO).

Magnesium metal is highly reactive and readily oxidizes in the presence of oxygen. The outer layer of magnesium metal reacts with oxygen molecules to form magnesium oxide. This process occurs gradually over time as magnesium atoms on the surface of the metal react with oxygen.

The formation of magnesium oxide is a classic example of an oxidation reaction, where magnesium undergoes oxidation by losing electrons, and oxygen undergoes reduction by gaining electrons. This type of reaction is commonly observed in the corrosion of metals when they are exposed to air or other oxidizing agents.

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Answer:

46.5

Explanation:

1.307 m + 45.2 m = 46.507

Rounded to the correct amount of signifigant figures it would be 46.5.

The operation 1.307 m + 45.2 m results in the value of m is equivalent to 46.5 m

The operations is defined as a functions which is take zero or more input value to give a well defined output value.

There are mainly four arithmetic operations:

This operations are well known as binary operations.

This four operations are considered as very important operations for all kind of calculations.

1.307 m + 45.2 m = 46.507 m

Rounded to correct amount of significant figures it would be 46.5 m

Thus, the operation 1.307 m + 45.2 m results in the value of m equivalent to 46.5 m

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So, Weight with molality percent of camphor = (45.0 g / 376.62 g) x 100% = 11.96%

Calculate the number of moles of camphor in the solution:

Number of moles of camphor = 45.0 g / 152.23 g/mol = 0.296 mol

Next, let's calculate the mass of ethanol in the solution:

Mass of ethanol = 0.785 g/mL x 425 mL = 331.62 g

Now, let's calculate the molality of the solution:

Molality = number of moles of camphor / mass of ethanol (in kg) = 0.296 mol / 0.33162 kg = 0.892 m

Next, let's calculate the mole fraction of camphor in the solution:

Mole fraction of camphor = number of moles of camphor / total number of moles in the solution

To calculate the total number of moles in the solution, we need to convert the mass of ethanol to moles:

Number of moles of ethanol = 331.62 g / 46.07 g/mol = 7.194 mol

Total number of moles in solution = 0.296 mol + 7.194 mol = 7.49 mol

Mole fraction of camphor = 0.296 mol / 7.49 mol = 0.0395

Finally, let's calculate the weight percent of camphor in the solution:

Weight percent of camphor = (mass of camphor / total mass of solution) x 100%

Total mass of solution = 45.0 g + 331.62 g = 376.62 g

Weight percent of camphor = (45.0 g / 376.62 g) x 100% = 11.96%

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Answer:

compressed spring

Explanation:

Answer:

semiconductors

Explanation:

Answer: Semiconductors

Explanation:

The initial concentration of the monoprotic weak acid solution (pka = 4.2) ` has a pH value of 3.4 is : 0.0025 M.

The pH value = 3.4

The pka value = 4.2

The monoprotic acid is given as follows :

HA   ---->   H⁺  +  A⁻

The pH expression is given as :w

pH = 1/ 2 [ pka - loga]

where,

pka = 4.2

pH = 3.4

3.4 = 1/2 [ 4.2 - loga]

6.8 = 4.2 - log a
2.6 = - log a

a =  10^-2.6

a = 0.0025 M

The initial concentration of a monotropic acid is 0.0025 M.

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Answer:

142.218

Explanation:

The ideal gas law is PV=nRT

P= pressure in kpa

V= volume

n= number of moles

R= always equals 8.31

T= temperature in kelvins

P= (1.25)(101.3)= 126.625kPa

V= 14L

n= 1.50 mol

R= 8.31

T= ?

Multiply (126.625)(14) then divide that by (1.5)(8.31) to get your temperature in kelvins

Answer:

In the periodic table, the elements are arranged in horizontal rows called periods (numbered in blue) and vertically into columns called groups

Answer:

The periodic table was created to organize the elements and provide physical and chemical properties, also to group with elements like it.

Hope this helps

Answer:

Solution A: 3.21% (m/v) NaCl  ⇒ CRENATION

Solution B: 1.65% (m/v) glucose  ⇒ HEMOLYSIS

Solution C: distilled H₂O  ⇒ HEMOLYSIS

Solution D: 6.97% (m/v) glucose  ⇒ CRENATION

Solution E: 5.0% (m/v) glucose and 0.9%(m/v) NaCl ⇒ CRENATION

Explanation:

Isotonic solution = 0.9% (m/v) NaCl or 5.0% (m/v) glucose

Crenation will occur if the solution has a concentration higher than 0.9% (m/v) NaCl or 5.0% (m/v) glucose (hypertonic solution). This will occur in the following solutions:

Solution A: 3.21% (m/v) NaCl  > 0.9% (m/v) NaCl

Solution D: 6.97% (m/v) glucose  > 5.0% (m/v) glucose

Solution E: 5.0% (m/v) glucose and 0.9%(m/v) NaCl (the addition of the 2 components exceeds the osmotic pressure permitted).

Hemolysis will occur if the solution has a concentration lower than 0.9% (m/v) NaCl or 5.0% (m/v) glucose (hypotonic solution). This is the case of:

Solution B: 1.65% (m/v) glucose < 5.0% (m/v) glucose

Solution C: distilled H₂O = 0% glucose/0% NaCl < 0.9% (m/v) NaCl or 5.0% (m/v) glucose

Answer:

Sound waves in air (and any fluid medium) are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves.

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A good starting point for citation chaining would be a relevant and well-cited article or book that directly relates to your research the topic.

This article or book should have a comprehensive bibliography or  the reference list that you can use to find additional sources. By examining the references cited in the original article, you can identify the other articles and books that are likely to be relevant to your research. Then, you can examine the references in those articles to find even more sources, continuing the process until you have a comprehensive set of relevant sources for your research.

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Answer:

a

Explanation:

Atoms form bonds by donating,accepting or sharing electrons with other atoms as bonding gives atoms same number of electrons as a noble gas which is similar to it's electronic configuration.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Answer:

if the negative ion ends in -ide

Explanation:

The rules for naming the ionic compounds is given as :

The negative ion (anion) is written next. The suffix is added at the end of the negative ion (anion). The suffix used is '-ide'.

Answer:

A. if the negative ion ends in -ide

Explanation:

in ionic compounds the second name in the chemical name is the negative atom, and always the second name in a chemical name has to end in -ide.

So putting those together, the negative ion (which in ionic compounds, comes SECOND) ends in -ide.

Also, I got this question correct on the edg review! :)

Thank God because he blesses us everyday!

Answer:

\(c=3.71\ J/g^{\circ} C\)

Explanation:

Given that,

Mass of sample, m = 996.9 g

The change in temperature of the sample, \(\Delta T=-70.98^{\circ}C\)

Heat produced, Q = 62.9  calories = 263173.6 J

The heat released by a sample due to change in temperature is given by :

\(Q=mc\Delta T\)

Where

c is the specific heat capacity

So,

\(c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{263173.6}{996.9\times 70.98}\\\\c=3.71\ J/g^{\circ} C\)

So, the specific heat of ethanol is equal to \(3.71\ J/g^{\circ} C\).

Answer:

For question 4.1, the proton numbers of the neutral X, Y, and Z are the same, since the number of protons is determined by the atomic number, which remains unchanged regardless of the ion's charge. So, if X has an atomic number of 3, Y and Z also have an atomic number of 3.

For question 4.2, the atomic number of S is 16, since S-2 and Ca+2 have the same number of electrons and the atomic number of Ca is 20. Since the atomic number is equal to the number of protons, then S must have 16 protons.

For question 4.3, Y must have 11 protons. Since X has an atomic number of 14, then it has 14 protons, and since X3- and Y2+ have the same number of electrons, then Y must have 11 protons in order to balance out the charges.

For question 4.4, X must have 15 protons. Since P5+ and X-1 have the same number of electrons, then X must have 15 protons in order to balance out the charges, and since the atomic number is equal to the number of protons, then X must have an atomic number of 15.

For question 4.5, X must have 18 protons. Since X3- and Y2+ have the same number of electrons, and the sum of electrons is 36, then X must have 18 protons in order to balance out the charges, and since the atomic number is equal to the number of protons, then X must have an atomic number of 18.

Answer:  (1 Kilogram = 2.20462 pounds) . There are 2.2046226218 lb in 1 kilogram. To convert kilograms to pounds, multiply your figure by 2.205 for an approximate result. 1 kilogram is also equal to 2 lb and 3.27396195 oz. Working out a rough estimate in your head for converting to pounds and ounces may be tricky - remember that there are 16 ounces in a pound.

Answer:

Scientific notation

Explanation:

For example 10000000000 =10 to the power of ten

Answer:

the pH of the solution is:

pH = 14 - pOH = 14 - 1.15 = 12.85

Explanation:

Sr(OH)2 dissociates into Sr2+ and 2 OH- ions in water. Since it is a strong base, it dissociates completely in water.

The hydroxide ion concentration can be calculated as follows:

[OH-] = 2 × 0.035 M = 0.07 M

The pH of the solution can be calculated using the formula:

pH = 14 - pOH

where pOH is the negative logarithm of the hydroxide ion concentration:

pOH = -log[OH-] = -log(0.07) = 1.15

Therefore, the pH of the solution is:

pH = 14 - pOH = 14 - 1.15 = 12.85

A violent change in weather occurs as the cold air mass digs underneath the warm air mass creating thunderstorms and snowstorms in the winter.

Weather is the state of the atmosphere, describing for example the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy.On Earth, most weather phenomena occur in the lowest layer of the planet's atmosphere, the troposphere,just below the stratosphere.

Weather refers to day-to-day temperature, precipitation, and other atmospheric conditions, whereas climate is the term for the averaging of atmospheric conditions over longer periods of time.When used without qualification, "weather" is generally understood to mean the weather of Earth.

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Answer:

150g

Explanation:

Assuming they are ideal gases at the same temperature and pressure, equal moles of gasses have equal volume. IN this case, if we have 10g of hydrogen gas, that is 5 moles of H2 gas. That means 5 moles og NO2 will occupy the same volume which is 5*(14.0 + 16.0*2) =  230 g

The metals that will react with aqueous \(AlCl_3\) to form elemental Al are Na and Fe.

A single displacement reaction occurs when aqueous \(AlCl_3\) reacts with Na or Fe to form elemental Al.

The displacement reaction occurs in the following way:

2 \(AlCl_3\)  + 3 Na ⇒ 3 NaCl + 2 \(Al_2\)

\(AlCl_3\)  + 3 Fe ⇒ 3 \( FeCl_2\) + 2 Al

The reaction between aqueous \(AlCl_3\)  and Mg or Mn does not result in the formation of elemental Al. As a result, both Mg and Mn will not respond to form elemental Al with aqueous \(AlCl_3\)

As a result, the appropriate response is to select "Na and Fe." Therefore, Na and Fe react with aqueous \(AlCl_3\) to form elemental Al.

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The first set of quantum numbers is invalid. According to the quantum number rules, the principal quantum number (n) must be a positive integer greater than zero. However, in this set, the principal quantum number is listed as -3, which violates this rule. Additionally, the azimuthal quantum number (l) should be an integer ranging from 0 to (n-1), but in this set, it is given as 2, which is outside the allowed range. The magnetic quantum number (m_l) should also be an integer ranging from -l to +l, but in this set, it is given as -3, which exceeds the allowed range for the given azimuthal quantum number.

The second set of quantum numbers is valid. The principal quantum number (n) is listed as 4, which satisfies the rule that it should be a positive integer greater than zero. The azimuthal quantum number (l) is given as 2, which is within the allowed range of values (0 to n-1). The magnetic quantum number (m_l) is listed as -1, which also falls within the acceptable range of values (-l to +l) for the given azimuthal quantum number.

In summary, the first set of quantum numbers is invalid due to violations of the rules regarding the principal quantum number, the azimuthal quantum number, and the magnetic quantum number. On the other hand, the second set of quantum numbers is valid as it adheres to the rules for each quantum number.

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Answer:

True

Explanation:The whole point of and expirement is to test the indepedent variable and the outcom or what your measuring is the dependent

sorry for the tone its late where i live

Answer:

anime

Explanation: