Sixty milliliters of a particular liquid has a mass of 350g. What is its density?

Answer:

its sodium hydroxide

Explanation:

Step 1

The mass of I-131 left in the body could be calculated as follows:

--------

Step 2

Data provided:

M = 5 μg (1 g = 1000000 μg) => 5 μg x (1 g/1000000 μg) = 5x10^-6 g

Mo = 5 g

Half-life = 8 hours = 8 h

-------

Step 3

Procedure:

Answer: t = 159 h (approx.)

Answer:

C. Sebum

Explanation:

C. Sebum

\(\text {Hi There! Let's Solve this Problem!}\)

\(\text {Since we are trying to find how many milligrams (mg) are in 13 grams}\) \(\text {we Multiply 1000.}\)

\(\text {\underline {Multiply}}\)

\(\text {1000*13=}\)

\(\text {Your Answer Would Be:}\)

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Answer:

A.) 28

Explanation:

The mass number is the number of protons and neutrons within a particular atom. The charge of the atom is irrelevant because the mass number is not affected by the number of electrons.

Unless this atom is an isotope (different number of neutrons), there should be an equal amount of protons and neutrons.

As such, since the mass number is 56, there should be 28 protons and 28 neutrons (56 / 2 = 28).

Answer:

37.58 g of FeCl₂.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

Fe + 2HCl —> FeCl₂ + H₂

Next, we shall determine the mass of HCl that reacted and the mass of FeCl₂ produced from the balanced equation. This is can be obtained as follow:

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

Mass of HCl from the balanced equation = 2 × 36.5 = 73 g

Molar mass of FeCl₂ = 56 + (2×35.5)

= 56 + 71

= 127 g/mol

Mass of FeCl₂ from the balanced equation = 1 × 127 = 127 g

SUMMARY:

From the balanced equation above,

73 g of HCl reacted to produced 127 g of FeCl₂.

Finally, we shall determine the mass of FeCl₂ produced by the reaction of 21.6 g of HCl. This can be obtained as follow:

From the balanced equation above,

73 g of HCl reacted to produced 127 g of FeCl₂.

Therefore, 21.6 g of HCl will react to produce = (21.6 × 127)/73 = 37.58 g of FeCl₂.

Thus, 37.58 g of FeCl₂ were obtained from the reaction.

you can use this method to balance any equation,

write you elements down , then start balancing them one after the other,

starting from metals , to non metals

it's better to balance hydrogen and oxygen the last and in most cases , they are automatically balanced

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The number of C atoms in 0.247 mol of C is  1.48 X 10²³ .

The number of C atoms in 1 mol of C is 6.02 X 10²³, which is also called Avogadro’s number .

so, The number of C atoms in 0.247 mol of C is _

0.247x6.02x10²³= 1.48 X 10²³.

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Answer:

\(0.01molO_2\)

Explanation:

Hello there!

In this case, by considering the definition of molar solution as the moles of solute over volume in liters or cubic meters of solution, we can see that actually 10.0 L of the solution are equal to 10.0 dm³. In such a way, since the concentration is 0.001 mol / dm³, the moles of oxygen that are dissolved turn out to be:

\(0.001mol/dm^3 * 10.0dm^3\\\\0.01molO_2\)

Best regards!

Answer:Venus and mars

Explanation:

Venus and Mars are the most like Earth, but in different ways. In terms of size, average density, mass, and surface gravity, Venus is very similar to Earth. But Mars is the planet that is most similar to Earth in other ways.

Only one planet in our solar system is particularly eccentric: Mercury with an eccentricity of 0.21. The dwarf planet Pluto also has an eccentricity of 0.25.

Explanation:

since 5g saturates 12.5g of water at 10°c

so......x would saturate 50g of water at 0°c

then you can cross multiply

Answer:

16.51%

Explanation:

The reaction that takes place is

Meaning that the white precipitate that formed is AgCl. Now we convert 0.535 g of AgCl into moles, using its molar mass:

Then we convert 0.00373 moles of AgCl into moles of CaCl₂, using the stoichiometric coefficients:

We convert moles of CaCl₂ into grams, using its molar mass:

Finally we calculate the percent of CaCl₂ by mass in the original mixture:

The percent calcium chloride by mass in the original mixture is 16.4%

The equation of the reaction between calcium nitrate and silver chloride is:

\(\mathbf{CaCl_2 + 2AgNO_3 \to 2 AgCl+Ca(NO_3)_2}\)

Given that;

the number of moles of the precipitated AgCl is:

= 0.535 g / 143.32 g/mol

= 0.0037 moles

From the above reaction, If 2 moles of AgCl are formed  by 1 mole of CaCl2

Then, 0.0037 moles of AgCl will form (0.0037 × 1)/2 moles of CaCl2.

0.0037 moles of AgCl will form 0.00185 moles of CaCl2.

Now, we can say that the number of moles of CaCl2 present in the mixture is =  0.00185 moles

Mass amount of CaCl2 present = 0.00185 moles × 110.98 g/mol

Mass amount of CaCl2 present = 0.205 grams

Finally, the mass percentage   \(\mathbf{=\dfrac{0.205}{1.25}\times 100\%}\)

= 16.4%

Therefore, we can conclude that the percent calcium chloride by mass in the original mixture is 16.4%

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Locations of high air pressure is the beach whereas the location of low air pressure is in the sea on a hot, sunny, summer afternoon.

Areas where the air is warmed have lower pressure because the warm air rises in the air. These areas are known as low pressure systems. Places where the air pressure is high, are called high pressure systems. These are places where air is cold.

So we can conclude that Locations of high air pressure is the beach whereas the location of low air pressure is in the sea on a hot, sunny, summer afternoon.

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Answer: The account of the prophet Daniel demonstrates to Jews that God will rescue them from harm because made the lions shut their mouths so that Daniel was safe through the night.

The amount of heat required to vaporize 181.20 g of ethanol would be 170.1 kJ.

Using the formula:

Q = n ∆Hvap

where:

Moles of 181.20 g of ethanol = 181.20 g / 46.07 g/mol = 3.933 mol

Substituting the values:

Q = 3.933 mol x 43.3 kJ/mol = 170.1 kJ

In other words, the amount of heat required to vaporize 181.20 g of ethanol is 170.1 kJ.

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Answer:

a. the conversion of nitric oxide into elemental nitrogen and oxygen gas.

Explanation:

Hello,

In this case, combustion at the automobiles' motors is not complete since gasoline usually has a considerable nitrogen oxides content (NOx) which is highly toxic when giving off from the cars. For that reason, recent advancements have shown platinum-rhodium-based catalytic converters have the capacity to catalyze the conversion of nitrogen oxides to elemental nitrogen and oxygen which are nontoxic. For that reason, answer is a. the conversion of nitric oxide into elemental nitrogen and oxygen gas.

Regards.

Answer:

424.7J-312J=the specific amount of heat passing through the metal

The question is incomplete, the question is;

Which drawing best accounts for the polarity of methanol, CH3OH, and the bond polarities that make a major contribution to the overall molecular polarity?

A) drawing (1)                                  B) drawing (2)

D) drawing (4)                                  C) drawing (3)

Answer:

   B) drawing (2)

Explanation:

In Chemistry, the direction of dipole is shown from positive end to negative end.

The image that contains the options in the question asked has been attached.

We can see in image 2 that the oxygen atom was correctly designated as the negative end of the dipole while the carbon and hydrogen atoms were each designated as positive ends of the dipole in accordance with the magnitude of electronegativity difference between the two atoms. The net dipole moment is now taken in the direction shown in image 2. This is the correct answer.

Drawing 2 best accounts for the polarity of methanol, CH3OH. Therefore, the correct option is B.

A carbon atom (C) joins with three hydrogen atoms (H), a hydroxyl group (OH), and three other atoms to form methanol (CH3OH). An oxygen atom (O) is attached to a hydrogen atom to form a hydroxyl group. The three hydrogen atoms and hydroxyl groups are arranged in three dimensions, giving the molecular structure of methanol a tetrahedral form around the core carbon atom.

A polar covalent bond is formed between oxygen and hydrogen because the oxygen atom in the hydroxyl group is more electronegative than the carbon and hydrogen atoms. Due to the unequal sharing of electrons, oxygen has a partial negative charge (-) and hydrogen has a partial positive charge (+), resulting in this polarity.

So, the correct option is B.

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Your question is incomplete, most probably the complete question is:

Which drawing best accounts for the polarity of methanol, CH3OH, and the bond polarities that make a major contribution to the overall molecular polarity?

A) drawing (1)                                  B) drawing (2)

D) drawing (4)                                  C) drawing (3)

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:

Coke

Explanation:

Coke is a feul made out of almost pure carbon.

I hope this helps...

Have a nice day <3

Answer:

Coke

Coke is a fuel with few impurities and a high carbon content, usually made from coal. It is almost pure form of carbon.

Hope this helps :)

Pls brainliest...

It is the primary source which helps the students to relate in a personal way to events of the past and promote a deeper understanding of history as a series of human events. The primary source is better, because it contains more charts. The correct option is B.

The sources which are closest to the origin of the information and contain raw information which must be interpreted by the researches are called the primary sources. The secondary sources are closely related to the primary sources and often interpret them.

A direct access to the subject of our research is given by the primary source whereas the secondary source provides only second hand information and comments of other researches.

Thus the correct option is B.

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The correct formula for the compound that forms between aluminum (Al) and sulfur (S) is (d) Al₂S₃.

The correct option is E, none of the above.

The reaction between aluminum (Al) and sulfur (S) is an example of a chemical reaction known as a combination or synthesis reaction. In this reaction, aluminum and sulfur combine to form a

.

The chemical equation for the reaction is:

2Al + 3S → Al₂S₃

Aluminum has a 3+ charge (Al³⁺) and sulfur has a 2- charge (S²⁻). In order to balance the charges, two aluminum ions (Al³⁺) are needed to combine with three sulfur ions (S²⁻), resulting in the formula Al₂S.

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The rate constant at 700°C is not a constant value and will depend on the specific reaction and the reactant concentrations.

A constant value is a fixed value that does not change. It is often used in mathematics and computer programming. Constant values are also used to represent physical quantities that do not vary, such as the speed of light or the mass of a proton. Constant values can be used as part of an equation, or as a comparison point for a variable. They are often used as a reference point in equations, or to make calculations simpler. Constant values can also be used to represent a fixed amount of something, such as a set fee or a fixed number of items. Constant values can help ensure the accuracy of calculations and ensure that the results are consistent.

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The heat absorbed by the engine block when its temperature is raised from 20°C to 90°C is 665,640 J.

To calculate the heat absorbed by the engine block, we can use the equation:

Q = mcΔT

where Q is the heat absorbed, m is the mass of the engine block, c is the specific heat capacity of steel, and ΔT is the change in temperature.

First, we need to calculate the specific heat capacity of steel. The specific heat capacity of steel is typically around 0.45 J/g°C.

Using this value and the given values of mass and temperature change, we can calculate the heat absorbed by the engine block as follows:

Q = (21080 g) x (0.45 J/g°C) x (90°C - 20°C)

Q = 21080 g x 0.45 J/g°C x 70°C

Q = 665,640 J

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Met-Ser-Ser-Leu-Ser-Leu amino acid sequence will be generated, based on 5' AUG-UCU-UCG-UUA-UCC-UUG 3' mRNA codon sequence.

mRNA have triplet codons and each triplet codon codes for an amino acid. An amino acid can be coded by many triplet codons but one amino acid can only code for a single amino acid.  

AUG is a start codon that codes for initiator amino acid called methionine. Serine can be coded by UCU, UCC, UCA, UGC, AGU, AGC triplet codon. leucine can be coded by UUA, UUG, CUU, CUC, CUA, CUG.

So the codon sequence 5' AUG-UCU-UCG-UUA-UCC-UUG 3' will generate Met-Ser-Ser-Leu-Ser-Leu amino acid sequence.

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Answer:

Friction also prevents an object from starting to move, such as a shoe placed on a ramp. When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy.

Friction is involved in energy transformation considering the fact that When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy.

Friction also prevents an object from starting to move, such as a shoe placed on a ramp.

In other words, opposing force is known as friction. The type of friction that acts on an object that is not moving is static friction.

Static friction serves as a kind of friction that do occur between two object that are not moving which means the object are static in nature.

Thats why during rainy season while walking on slippery roads people wear shoes with spikes which prevents a person from slipping into mud by the action of friction.

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The value of S2 is S₂ = 2.1 g/L.Approximately 2.1 g of the gas will dissolve in 2 L of water at 0.6 ATM, assuming the temperature remains constant.

To determine the amount of gas that will dissolve in 2 L of water at 0.6 ATM, we can use Henry's law, which states that the solubility of a gas is directly proportional to the partial pressure of the gas above the liquid.

According to Henry's law, the solubility of a gas can be represented as:S₁/P₁ = S₂/P₂,,where S₁ and S₂ are the solubilities of the gas at the respective pressures P₁ and P₂.Given that 7 g of the gas dissolves in 1 L of water at 2.0 ATM, we can consider this as our initial condition, denoted by S₁/P₁.

Now, we need to find the solubility at 0.6 ATM in 2 L of water, denoted by S₂/P₂.Since the temperature remains constant, we can assume that the solubility of the gas does not change. Therefore, we can rewrite the equation as:

S₁/P₁ = S₂/P₂,

Substituting the known values, we have:

(7 g/1 L)/(2.0 ATM) = S₂/(0.6 ATM),

Solving for S₂, we get:

S₂ = (7 g/1 L) * (0.6 ATM)/(2.0 ATM),

S₂ = 2.1 g/L.

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