A negative ion has moreA. protons than electrons
B. electrons than protons
C. neutrons than protons

Answer: 14.7 L of oxygen gas at 25 degrees celsius and 1.04 atm is needed for the complete combustion of 5.53g of propane

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at NTP, weighs equal to the molecular mass and contains avogadro's number of particles.

According to stoichiometry :

1 mole of propane requires 5 moles of oxygen  

Thus 0.125 moles of propane require= moles of oxygen  

According to the ideal gas equation:'

P = Pressure of the gas = 1.04 atm

V= Volume of the gas = ?

T= Temperature of the gas = 25°C = 298 K  

R= Gas constant = 0.0821 atmL/K mol

n= moles of gas= 0.625

Final answer:

To find the volume of oxygen gas needed for the complete combustion of propane at given conditions, use stoichiometric calculations based on the balanced chemical equation and apply the ideal gas law.

Explanation:

The question is asking for the volume of oxygen gas required for the complete combustion of a given amount of propane at a specified temperature and pressure. To solve this, stoichiometry must be used along with the ideal gas law. The balanced chemical equation for the combustion of propane (C3H8) is:

C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)

This equation indicates that one mole of propane reacts with five moles of oxygen. First, calculate the moles of propane by dividing the given mass of propane by its molar mass. Then, use the stoichiometric relationship from the balanced equation to find the moles of oxygen needed. Finally, apply the ideal gas law (PV=nRT) to calculate the required volume of oxygen at the given conditions (remembering to convert temperature to Kelvin and pressure to atm if necessary).

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Answer is: adenosine triphosphate.

ATP is made of three components: the triphosphate (P), the sugar ribose and a nitrogenous base (adenine).

ATP is short for adenosine triphosphate

Adenosine triphosphate converts to either the adenosine diphosphate (ADP) or adenosine monophosphate (AMP), in this process energy is released.  

The correct answer is A- Adenosine Triphosphate

Hope this helped! :)

Final answer:

Elements can be identified by their atoms through their atomic number, atomic mass, and chemical symbol, all of which are represented on the periodic table. The unique number of protons in an element's atomic nucleus is also identified. This information, combined with the arrangement of elements in the periodic table based on shared properties, reveals the identities of elements.

Explanation:

Elements are identified by their atoms through certain key properties that are represented on the periodic table. These key identifying properties include the atomic number, atomic mass, and the element's chemical symbol. For instance, in the case of carbon, its symbol (C) and name, its atomic number of six (given in the upper left-hand corner), and its atomic mass of 12.01 are displayed in its designated box in the periodic table.

Each element's unique number of protons in its atomic nucleus also helps identify an element. Additionally, the arrangement of elements in the periodic table provides insight into the elements' shared physical and chemical properties - they are arranged in a series of rows and columns based on these similarities. Atoms of elements can further combine and bond with each other in certain ways, based on these unique properties.

By the twentieth century, it was understood that these properties follow a periodic relationship with the atomic numbers, a concept referred to as the periodic law. A modern periodic table, thus, arranges the elements in ascending order of their atomic numbers and groups atoms with similar properties in the same column.

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Answer:

Velocity

Explanation:

The change of velocity rate it's the definition of acceleration.

While increasing or decreasing velocity, it means that an acceleration it's happening.

Using some math:

This can be read as "the acceleration it's equal to te variation of velocity with respect to time"

Answer:

45.45 ml of dimethyl sulfoxide

Explanation:

density of dimethyl sulfoxide is 1.10 g/10⁻³L which is 1.10 g/mL

now we devise the next reasoning:

If           1.10 g of dimethyl sulfoxide have a volume of 1 mL

Then     50 g of dimethyl sulfoxide have a volume of X mL

X = (50 × 1) / 1.10 = 45.45 ml of dimethyl sulfoxide

Final answer:

To calculate the volume of dimethyl sulfoxide needed, you must divide the mass by the density. With the given values, the resulting volume is approximately 45.45 L.

Explanation:

The subject of this question relates to the concept of density, which is directly related to mass and volume. We can apply the formula Density = Mass / Volume, hence Volume = Mass / Density. The mass provided in the question is 50.0 g and the density of dimethyl sulfoxide is given as 1.10 g×10^-3. Plugging in these values into the Volume equation gives us Volume = 50.0 g / 1.10 g×10^-3, which equals ~45,454.55 mL or approximately 45.45 L.

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