An unknown object has a mass of 150 grams and a volume of 5 cm3. What is the density of this
object?

The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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First use this equation to find the wave speed: vms== =τµ/ 0.4/ 0.001 20 / Then use the equation for solving frequency of a wavelength, and solve for wavelength λ = v/f = 20/100 = .2 m = 20 cm.

Answer: 55.5 oC is 0.014 atm (3rd decimal point)

Explanation:

The Clausius-Clapeyron equation is given as:

ln(P2/P1) = -(ΔH_vap/R) * (1/T2 - 1/T1)

where:

P1 = vapor pressure at temperature T1

P2 = vapor pressure at temperature T2

ΔH_vap = enthalpy of vaporization

R = gas constant = 8.314 J/(mol*K)

Converting the enthalpy of vaporization to J/mol:

ΔH_vap = 35.2 kJ/mol = 35,200 J/mol

Converting temperatures to Kelvin:

T1 = 64.7 + 273.15 = 337.85 K

T2 = 55.5 + 273.15 = 328.65 K

Substituting the values into the equation and solving for P2:

ln(P2/1 atm) = -(35,200 J/mol / 8.314 J/(mol*K)) * (1/328.65 K - 1/337.85 K)

ln(P2/1 atm) = -4.231

P2/1 atm = e^(-4.231)

P2 = 0.014 atm

Therefore, the vapor pressure for methanol at 55.5 oC is 0.014 atm, to the third decimal point.

Answer:

is

Explanation:

because

Answer:

name four agricultural inputs are subsidized by the government

0.297 kJ of heat is needed to raise the temperature of 10g of aluminum from 22 degrees Celsius to 55 degrees Celsius.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                  Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Given,

mass = 10g

c = 0.901J/g⁰C

Initial temperature (T₁) = 22⁰C

Final Temperature (T₂) = 55⁰C

Q = mcΔT

= 10 × 0.901 × (55 -22)

= 297.33 J = 0.297 kJ

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To solve this problem using the gas laws, we need to use the Ideal Gas Law. This law states that the product of the pressure and the volume of a gas is proportional to the absolute temperature.

The equation of the Ideal Gas Law is the following:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{\dfrac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2} } \end{gathered}$} }\)

Where:

We clear for V₂:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{P_1V_1T_2}{P_2T_1 } } \end{gathered}$} }\)

Where:

Substituting the known values:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{760\not{kPa}\times0.050 \ L\times20.0\not{k} }{ 380\not{kPa}\times10.0\not{k} } } \end{gathered}$} }\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{760 \ L}{3800 } } \end{gathered}$} }\)

\(\boxed{\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2\approx0.2 \ Liters} \end{gathered}$} }}\)

Answer:

d.) granulated

Because the granulated sugar has a greater surface area.

The net ionic equation for the reaction between Na₂SO₄ and CaCl₂ is:

SO₄²¯(aq) + Ca²⁺(aq) —> CaSO₄(s)

(Option C)

In solution, Na₂SO₄ and CaCl₂ will dissociate as follow

Na₂SO₄(aq) —> 2Na⁺(aq) + SO₄²¯(aq)

CaCl₂(aq) —> Ca²⁺(aq) + 2Cl¯(aq)

Na₂SO₄(aq) + CaCl₂(aq) —>

2Na⁺(aq) + SO₄²¯(aq) + Ca²⁺(aq) + 2Cl¯(aq) —> CaSO₄(s) + 2Na⁺(aq) + 2Cl¯(aq)

Cancel out the spectator ions (i.e Na⁺ + Cl¯) to obtain the net ionic equation

SO₄²¯(aq) + Ca²⁺(aq) —> CaSO₄(s)

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Answer

pOH=8.036

pH=5.964

The solution is acid

Procedure

We need to consider the following when we speak about pH and pOH

As we have a concentration of [OH-] ions, we will first calculate the pOH

Then we calculate the pH assuming the solution is at 25 C.

We can see that as the pH of this solution is lower than 7, the solution will be acid.

The balanced molecular equation for the reaction of magnesium nitrate, Mg(NO₃)₂ and sodium phosphate, Na₃PO₄ is:

3Mg(NO₃)₂(aq) + 2Na₃PO₄(aq) → 6NaNO₃(aq) + Mg₃(PO₄)₂(s)

The balanced molecular equation for the reaction of magnesium nitrate, Mg(NO₃)₂ and sodium phosphate, Na₃PO₄ can be written as illustrated below:

Mg(NO₃)₂(aq) + Na₃PO₄(aq) → NaNO₃(aq) + Mg₃(PO₄)₂(s)

There is 1 atom of Mg on the left side and 3 atoms on the right. It can be balanced by writing 3 before Mg(NO₃)₂ as shown below:

3Mg(NO₃)₂(aq) + Na₃PO₄(aq) → NaNO₃(aq) + Mg₃(PO₄)₂(s)

There is 1 atom of P on the left side and 2 atoms on the right. It can be balanced by writing 2 before Na₃PO₄ as shown below:

3Mg(NO₃)₂(aq)  + 2Na₃PO₄(aq) → NaNO₃(aq) + Mg₃(PO₄)₂(s)

There are a total of 6 atom of Na on the left side and 1 atom on the right. It can be balanced by writing 6 before NaNO₃ as shown below:

3Mg(NO₃)₂(aq) + 2Na₃PO₄(aq) → 6NaNO₃(aq) + Mg₃(PO₄)₂(s)

Now, the equation is balanced.

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The measurement on the buret should be read from the bottom of the meniscus.

Burets are commonly used in analytical chemistry experiments, such as titration, where small and precise quantities of a liquid are needed to be added to another solution for the purpose of determining the concentration or amount of a particular substance in the solution A buret (also spelled burette) is a laboratory glassware used for precisely measuring the volume of a liquid. It is typically a long, graduated tube with a stopcock (a valve) at the bottom that allows for controlled dispensing of the liquid. The volume of liquid dispensed can be read by observing the position of the meniscus (the curved surface of the liquid) in relation to the graduated markings on the tube.

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KH2PO4 is a more suitable choice as a buffer because it has a greater buffering capacity due to the presence of the weak acid and its conjugate base.

KHPo4 is not considered an effective buffer compared to KH2PO4 due to its limited buffering capacity. The effectiveness of a buffer is determined by the concentration and dissociation properties of its conjugate acid-base pair.

KH2PO4 is a salt composed of the weak acid H2PO4- and its conjugate base HPO4^2-. In an aqueous solution, KH2PO4 can dissociate to release H+ ions from the H2PO4- component, which acts as a weak acid, and the HPO4^2- component can accept H+ ions, acting as a weak base. This allows KH2PO4 to effectively resist changes in pH when small amounts of acid or base are added to the solution.

On the other hand, KHPo4 consists of the strong acid H3PO4 and the weak base HPO4^2-. H3PO4 fully dissociates in water, providing a large concentration of H+ ions, making it difficult for the HPO4^2- to effectively act as a base and maintain pH stability.

Therefore, KH2PO4 is a more suitable choice as a buffer because it has a greater buffering capacity due to the presence of the weak acid and its conjugate base.

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Answer:

Signs of chemical reactions may be:

Gas release

Formation of a precipitate

Change of color

Change of odor

Change of pH

Change of aspect

Change of viscosity

Change of the temperature

Visible formation of new compounds

Explanation:

Answer:

Types of bonding in chemistry

There are three primary types of bonding: ionic, covalent, and metallic. Definition: An ionic bond is formed when valence electrons are transferred from one atom to the other to complete the outer electron shell.

Explanation:

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Mechanical disintegration means breaking into small pieces (option A).

Digestion is the process occuring in the gastrointestinal tract, by which food is converted into substances that can be utilized by the body.

Digestion can, however, be mechanical/physical or chemical/enzymatical. The mechanical digestion involves the breaking down of food into smaller pieces by teeth.

Therefore, according to this question, there is no passage, however, the meaning of mechanical disintegration can be easily detected in biology.

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From the given graph, if we change from a moderately acidic environment ( pH near 6) to a basic environment, the peroxidase activity will decrease. Therefore, option (A) is correct.

pH can be described as the negative logarithm of hydrogen ion (H⁺) concentration. Mathematically, pH is generally inversely proportional to the concentration of hydrogen ions (H⁺).

pH = -log ([H⁺])

In chemistry, pH is a scale used to determine the acidity or basicity of an aqueous solution. Acidic solutions are calculated to have lower pH values than basic or alkaline solutions.

The pH scale possesses ranges from 0 to 14 while pH 7.0 is neutral. A low pH (about 1 or 2) is acidic and a high pH (12 or 14) is basic.

When we change the moderately acidic environment to a basic environment. We actually increase the pH value in the graph showing the peroxidase activity decreases when pH increases more than 6.

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In the given reaction, the limiting reactant is C₆H₆ (benzene).

To determine the limiting reactant as well as calculate the mass of HCl produced, compare the moles of each reactant.

The number of moles for each reactant:

Molar mass of Cl₂ = 35.5 g/mol + 35.5 g/mol = 71 g/mol

Moles of Cl₂ = mass of Cl₂ / molar mass of Cl₂

                     = 45 g / 71 g/mol

                     = 0.634 moles of Cl₂

Molar mass of C₆H₆ (benzene) = 12 g/mol + 6(1 g/mol) = 78 g/mol

Moles of C₆H₆ = mass of C₆H₆ / molar mass of C₆H₆

                        = 45 g / 78 g/mol = 0.577 moles of C₆H₆

Determine the stoichiometry between Cl₂ and HCl:

Cl₂ + C₆H₆ → C₆H₅Cl + HCl

Here, we can see that 1 mole of Cl₂ produces 1 mole of HCl.

Thus, the limiting reactant is C₆H₆ (benzene).

Calculate the mass of HCl produced:

Molar mass of HCl = 1 g/mol + 35.5 g/mol = 36.5 g/mol

Moles of HCl produced = moles of C₆H₆ = 0.577 moles

Mass of HCl produced = moles of HCl produced × molar mass of HCl

Mass of HCl produced = 0.577 moles × 36.5 g/mol

                                     ≈ 21.04 g

Therefore, approximately 21.04 grams of HCl will be produced.

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Answer:

The concentration of [H₃O^+] in a 0.300 M solution of CH₂CHCOOH is 3.16 × 10^-5 M.

Explanation:

Acrylic acid (CH₂CHCOOH) is a weak acid with a dissociation constant (Ka) of 3.16 × 10^-5.

The dissociation of acrylic acid in water is:

CH₂CHCOOH + H₂O ⇌ CH₂CHCOO^- + H₃O^+

The equilibrium expression for this reaction is:

Ka = [CH₂CHCOO^-][H₃O^+] / [CH₂CHCOOH]

At equilibrium, the concentration of CH₂CHCOOH that has dissociated is equal to the concentration of CH₂CHCOO^-:

[CH₂CHCOOH] = [CH₂CHCOO^-]

Let x be the concentration of [H₃O^+] at equilibrium. Then, the equilibrium concentration of [CH₂CHCOO^-] is 0.300 - x, and the equilibrium concentration of [CH₂CHCOOH] is also 0.300 - x.

Substituting these concentrations into the equilibrium expression gives:

Ka = (0.300 - x) * x / (0.300 - x)

Simplifying this expression:

Ka = x

Solving for x:

x = [H₃O^+] = Ka = 3.16 × 10^-5 M

Therefore, the concentration of [H₃O^+] in a 0.300 M solution of CH₂CHCOOH is 3.16 × 10^-5 M.

For a normal boiling point of a liquid is 282 °C, the temperature is mathematically given as

T2=181.55°C\

Generally, the equation for the gas  is mathematically given as

ln(p1/p2)=dHvap/R(1/T2-1/T1)

Therefore

ln(1/0.26)=23500/8.214(1/T2-1/555)

T2=181.55^C

In conclusion

T2=181.55°C

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Answer:

Composition: All hydrocarbons are made up of only two types of atoms: carbon and hydrogen. They are like building blocks that contain carbon and hydrogen stuck together.

Organic Nature: Hydrocarbons are special because they are part of a group of compounds that come from living things or things that were once alive. They have carbon and hydrogen in them, which is what makes them different from other types of compounds.

Explanation:

Answer:

Joints

Explanation:

Without joints we would not be able to bend our arms or legs. Hence option C is correct.

Bending is defined as the behavior of a thin structural element under an external load that is applied perpendicular to the element's longitudinal axis. Plants and their parts are thought to bend as a result of a flexure process in which the curvature of the plant part changes. The plant organs' collenchyma gives them flexibility and elasticity, preventing them from breaking when bent.

The force required to bend, straighten, and support joints is applied by muscles to the bones. Muscles act in pairs of flexors and extensors because they may pull on bones but not put them back into place. The extensor muscle relaxes and stretches as the flexor muscle contracts to bend the joint.

Thus, without joints we would not be able to bend our arms or legs. Hence option C is correct.

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I will eat the GAMMA-RAY because it can easily go outside my body without much harm. Those rays are just high-energy photons.

I think I would probably put the alpha-emitter in my pocket because those are easily stopped by a sheet of paper.

They are converted into a single “o” when "ao" or "oo" are together when naming covalent bonds.

A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms.

Sometimes, while naming the chemical compounds, a problem arises when compounds with “ao” and “oo” are written with -ide name. Conventionally, they are converted into a single “o”.

For example, the “ao” in the dichlorine hept-ao-xide (\(Cl_2O_7\)). This “ao” in the \(Cl_2O_7\) can be converted into “o”. As the result, the correct name of this compound would be dichlorine hept-o-xide.

Hence, they are converted into a single “o” when "ao" or "oo" are together when naming covalent bonds.

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Answer: Volume required is 0.115 L or 115 ml

Explanation:

moles of \(NaHCO_3\) = \(\frac{\text {given mass}}{\text {Molar mass}}=\frac{1.30g}{84g/mol}=0.015mol\)

The balanced chemical equation is:

\(HCl+NaHCO_3\rightarrow NaCl+H_2CO_3\)

1 mole of \(NaHCO_3\) requires = 1 mole of HCl

Thus 0.015 mol of \(NaHCO_3\) requires = \(\frac{1}{1}\times 0.015=0.015\) mole of HCl

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

\(Molarity=\frac{n}{V_s}\)

where,

n = moles of solute

\(V_s\) = volume of solution in L

\(0.130=\frac{0..015}{V_s}\)

\(V_s=0.115L\)

Thus volume required is 0.115 l or 115 ml

A 1.89 pints of blood would contain 873 grams of platelets.

To calculate the amount of platelets present in 1.89 pints, it is first necessary to transform this unit of volume into liters:

                                  \(1.89 \times 473.2 = 894.3 mL\)

                                         \(\frac{894.3}{1000}= 0.84L\)

Now, just calculate the amount of platelets present in 0.84L:

                                    \(\frac{1.04\times10^{3}g}{xg}=\frac{1L}{0.84L}\)

                                       x = 873 grams

So, a 1.89 pints of blood would contain 873 grams of platelets.

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Answer: True

Explanation:

Air is indeed a mixture as the component compounds and mixtures retain their individual properties as opposed to a compound that sees the component elements lose some of theirs.

Air is a type of mixture known as a homogeneous mixture which means that no matter what quantity of air is present, the composite elements (Oxygen, nitrogen etc) and compounds( carbon dioxide etc) are of the same quantity.  

Answer:

True

Explanation:

The balanced molecular equation for the reaction between sodium hydroxide (NaOH) and aluminum chloride (\(AlCl_3\)) in aqueous solution can be written as follows: 2NaOH(aq) + 3\(AlCl_3\)(aq) → 3NaCl(aq) + \(Al(OH)_3\)(s)

In this reaction, sodium hydroxide (NaOH) reacts with aluminum chloride (\(AlCl_3\)) to form sodium chloride (NaCl) and aluminum hydroxide (\(Al(OH)_3\)). The coefficients in the balanced equation indicate the stoichiometric ratio between the reactants and products.

The physical states of the substances are indicated by the symbols (aq) for aqueous solutions and (s) for the solid precipitate.

The reaction is a double-displacement reaction, also known as a precipitation reaction. Double-displacement reactions involve the exchange of ions between two compounds, resulting in the formation of a precipitate.

In this case, sodium hydroxide and aluminum chloride react to form sodium chloride and aluminum hydroxide, with aluminum hydroxide being the white solid precipitate.

It's worth noting that the actual reaction might involve hydrated forms of the compounds, such as NaOH·x\(H_2O\) and \(AlCl_3\)·y\(H_2O\). However, for simplicity, these hydrated forms are not included in the balanced equation.

Overall, the balanced equation represents the chemical reaction between sodium hydroxide and aluminum chloride, showing the reactants, products, and their stoichiometric ratios.

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