Answer:
Chemical properties,
Explanation:
Let us understand all the given terms
a) catalyst properties: this is the property of a substance by virtue of which it helps to modulate the rate of reaction, and itself remains unconsumed during the reaction (does not react). Example : enzymes
b) chemical properties: this is the property of a substance by virtue of which it reacts with another substance to give a new product of different structure, bonding, chemical and physical properties.
Example : hydrogen reacts with oxygen to give water.
So here the hydrogen is undergoing reaction with oxygen and this is chemical property of hydrogen.
c) Physical properties: This is the property which is related to the nature of a substance to exit in nature. for example hydrogen is a gas is its physical property not chemical.
d) mineral properties: It is again a kind of physical property.
If a room requires 12.3 square yards of carpeting, what is the area of the floor in units of ft2? (3 ft = 1 yd)
Final answer:
To convert 12.3 square yards of carpeting to square feet, multiply by 9, as there are 9 square feet per square yard, resulting in an area of 110.7 ft².
Explanation:
To calculate the area of the floor in square feet (ft²) given that the area is 12.3 square yards, we need to use the conversion between yards and feet. One square yard is equal to nine square feet, as 1 yard is equivalent to 3 feet and this conversion applies in both dimensions of area. Hence, to convert square yards to square feet, you multiply the square yards by the square feet equivalent of one square yard:
12.3 yd² × (9 ft²/1 yd²) = 12.3 × 9 ft²
The area of the carpeting required in square feet is therefore:
12.3 × 9 = 110.7 ft²
. Divide 94.20 g by 3.167 22 mL.
Answer : The answer will be 29.74 g/mL
Explanation :
As we are given an expression :
Divide 94.20 g by 3.16722 mL.
To solve this problem, we use division operation. So,
[tex]\frac{94.20g}{3.16722mL}[/tex]
By solving the term, we get:
[tex]\Rightarrow 29.74g/mL[/tex]
According to the significant rule of division, the least number of significant figures in any number of the problem determines the number of significant figures in the answer.
In the given expression, 94.20 has 4 significant figures and 3.16722 has 6 significant figures. From this we conclude that 4 is the least significant figures in this problem. So, the answer should be in 4 significant figures.
Thus, the answer will be 29.74 g/mL
When cream mixes with coffee, is this a chemical or physical change?
It is a physical change when cream mixes with coffee, it changes the color of the coffee. When you add more or less cream there is a color change depending on the consistency of cream. The properties are not changes and a no new compound is formed as in chemical change with a reaction of two compounds, a new compound is formed with different properties. So it is a physical change.
How many protons, neutrons, and electrons are in a neutral atom with the symbol 41Ca
The neutral 41Ca atom has 20 protons, 21 neutrons, and 20 electrons. The atomic number of Calcium is 20 which represents the number of protons and also the electrons in the neutral atom. To determine the number of neutrons, we subtract the number of protons from the total mass number, getting 21 neutrons.
Explanation:The symbol 41Ca for Calcium represents an isotope of Calcium. The number before the symbol, 41, is the mass number, which is the sum of protons and neutrons. The atomic number of Calcium (Ca), which represents the number of protons is 20 (from the periodic table). This doesn't change irrespective of the isotope. As it is a neutral atom, the number of electrons is equal to the number of protons, again 20.
To calculate the number of neutrons in this isotope, we subtract the number of protons from the mass number. So the number of neutrons = 41 - 20 = 21 neutrons.
In conclusion, the neutral 41Ca atom has 20 protons, 21 neutrons, and 20 electrons.
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The ccl4 formed in the first step is used as a reactant in the second step. if 2.00 mol of ch4 reacts, what is the total amount of hcl produced? assume that cl2 and hf are present in excess.
Final answer:
When 2.00 moles of methane (CH₄) reacts with chlorine (Cl₂), according to the balanced chemical equation, the total amount of hydrogen chloride (HCl) produced is 8 moles.
Explanation:
The student is inquiring about the reaction between methane (CH₄) and chlorine (Cl₂) to produce carbon tetrachloride (CCl₄) and hydrogen chloride (HCl). We are given that 2.00 moles of methane react and asked to calculate the total amount of HCl produced, assuming that chlorine and hydrogen fluoride are present in excess.
First, we need to balance the chemical equation to understand the stoichiometry of the reaction:
CH₄ + 4 Cl₂ → CCl₄ + 4 HCl
From the balanced equation, we see that 1 mole of CH₄ reacts with 4 moles of Cl₂ and produces 4 moles of HCl. Therefore, if 2.00 moles of CH₄ reacts, it will produce:
mol HCl produced = 2 mol CH₄ × (4 mol HCl / 1 mol CH₄) = 8 moles of HCl
Heliocentric theory _____.
Answer: was rejected by religious society and the church
Explanation:
At first, heliocentric theory was rejected by the Church and the religious public. Despite large amounts of evidence supporting the theory, the Catholic church prohibited scientists from teaching it as anything more than a hypothesis
Which reagent is the limiting reactant when 0.550 mol Al(OH)3 and 0.550 mol H2SO4 are allowed to react?
If the atomic number of potassium is 19, how many protons occur in the nucleus of a potassium atom?
Final answer:
Potassium has an atomic number of 19, which means there are 19 protons in the nucleus of a potassium atom.
Explanation:
The atomic number of an element, such as potassium, is defined as the number of protons in the nucleus of an atom of that element. Since potassium has an atomic number of 19, there are 19 protons in the nucleus of a potassium atom. Additionally, this atomic number also means that a neutral atom of potassium would have 19 electrons. The electron configuration code for potassium, reflecting the arrangement of these 19 electrons in different shells or energy levels, can also be determined based on its atomic number.
how does the government provide support to the people of the HIV and AIDS awareness campaign
Answer:
AIDS is acquired immuno deficiency syndrome caused by the HIV (human immunodeficiency virus). The government has raised the following awareness campaign on AIDS:
Government provides proper health care to the individual suffering from AIDS.
The government raises the awareness and the importance of the HIV test.
The government provides drugs to the people that are effective against the HIV.
In the "methode champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. the reaction is given below. c6h12o6(aq) 2 c2h5oh(aq) + 2 co2(g) fermentation of 724 ml grape juice (density = 1.0 g/cm3) is allowed to take place in a bottle with a total volume of 825 ml until 12% by volume is ethanol (c2h5oh). assuming that the co2 is insoluble in h2o (actually, a wrong assumption), what would be the pressure of co2 inside the wine bottle at 29°c? (the density of ethanol is 0.79 g/cm3.)
To calculate the pressure of CO2 in the wine bottle, you can use the ideal gas law equation PV = nRT. Convert the volume of ethanol produced to the volume of CO2 using stoichiometry. Take into account that the assumption that CO2 is insoluble in H2O is incorrect.
Explanation:The pressure of CO2 inside the wine bottle can be calculated using the ideal gas law equation PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin. To calculate the number of moles of CO2 produced, you need to convert the volume of ethanol produced to the volume of CO2 using stoichiometry. Finally, you can calculate the pressure of CO2 using the equation.
The density of ethanol is given as 0.79 g/cm3, so you can convert the volume of ethanol to its mass. The volume of CO2 produced is twice the volume of ethanol produced. From the information given, you can calculate the number of moles of CO2 produced. Then, you can convert the temperature in Celsius to Kelvin and use the ideal gas law equation to calculate the pressure of CO2 inside the wine bottle at 29°C.
Remember that the assumption made in the question that CO2 is insoluble in H2O is incorrect. In reality, it dissolves to some extent in water, which affects the pressure calculation.
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What is the formula for the compound methane? express your answer as a chemical formula?
The chemical formula of methane is CH₄.
This means that a single molecule of methane consists of one carbon atom (C) and four hydrogen atoms (H). It is the simplest alkane and a major component of natural gas. Methane's structure can also be represented by a Lewis structure where the carbon atom forms covalent bonds with four hydrogen atoms.
This configuration allows methane to follow the octet rule, ensuring that the carbon atom has eight electrons in its valence shell, while each hydrogen atom follows the duet rule, having two valence electrons.The chemical formula of methane is CH₄, indicating one carbon atom bonded to four hydrogen atoms. The relative abundance of methane makes it a significant fuel source.Which of the following correctly describes the role of scientific models in the advancement of technology?
a. Models represent the basic facts.
b. Models are educated guesses that can be tested.
c. Models help us better understand the phenomena. <---?
d. Models answer specific questions about phenomena.
Which substance can not be broken down by a chemical change?
a.ammonia
b.methanol
c.propane
d.phosphorus?
Naturally occurring copper is 69.15% copper-63 (atomic mass = 62.93 amu) and 30.85% of some other isotopic form of copper. what must the atomic mass of this second isotope be in order to account for the 63.55 amu average atomic mass of copper? (write the answer to two decimal places.)
An automobile can travel 40.0 miles on one gallon of gasoline how many kilometers per liter is this
Answer: 17.04 km/L
Explanation:
Given: An automobile can travel 40.0 miles on one gallon of gasoline
That is 40 miles/ gallon
Now using the conversion factor :
1 mile = 1.61 km
Thus 40 miles =[tex]\frac{1.61}{1}\times 40=64.4km[/tex]
Alsousing the conversion factor
1 gallon = 3.78 L
Thus [tex]40miles/gallon[/tex] will be [tex]\frac{64.4km}{3.78L}=17.04km/L[/tex]
Thus the answer is 17.04 km/L.
Discuss why the formation of membranes helped in the development of more complex life forms.
How many valence electrons does copper have?
How do the general methods for separating mixtures and compounds differ?
Scientists can find new discoveries that change their current understanding of scientific knowledge.
True or False?
yea the answer is true
Calculate the density of a material that has mass of 52.457g and a volume of 13.5 cm3
The following diagram shows a common way that scientific knowledge is discovered.
mc024-1.jpg
Which term should replace the question mark?
hypotheses
theories
laws
publications
How many electrons and valence electrons does the element magnesium have?
Write an equation that shows the formation of the phosphide ion from a neutral phosphorus atom.
From reference or science books, we can actually know that the elementary charge of phosphorus is -3. Since it is negative, this means that it has an excess of electrons, which further means that it takes up 3 electrons to become an ion. Therefore the equation can be written as:
P + 3e ---> P3-
Answer: [tex]P+3e^-\rightarrow P^{3-}[/tex]
Explanation: Phosphorous atom is the element with atomic number 15 and thus contains 15 electrons.
[tex]P:15:1s^22s^22p^63s^23p^3[/tex]
Thus it is short of 3 electrons to attain stable noble gas configuration. Thus it gains three electrons and converts to phosphide ion [tex](P^{3-})[/tex] with 18 electrons.
[tex]P^{3-}:18:1s^22s^22p^63s^23p^6[/tex]
In the periodic table which elements typically have similar properties
Elements in the periodic table with similar properties are found within the same group or vertical column, based on the periodic law which links properties to atomic numbers. Examples include alkali metals and halogens.
Explanation:In the periodic table, elements that typically have similar properties are grouped together in the same column or group. This is based on the periodic law, which states that the properties of the elements are periodic functions of their atomic numbers. For example, elements in the same vertical group have similar chemical behavior because they have the same number and distribution of electrons in their valence shells. This can be observed as you move down a group, with variations in characteristics such as atomic size, ionization energy, and electron affinity.
An example of this is the alkali metals in group 1, which all exhibit similar chemical properties. They are very reactive, especially with water, and tend to lose their single valence electron in chemical reactions. Similarly, halogens in group 17 also share properties, such as seven valence electrons and high electronegativity.
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Which element could provide one atom to make an ionic bond with fluorine? (Hydrogen will not make ionic bonds easily, so do not use this element).
Adding energy or increasing the speed of the particles at very low pressure in a solid would cause
A) boiling.
B) condensation.
C) melting.
Eliminate
D) sublimation.
Answer:
D) sublimation.
Explanation:
took the test
Sublimation is the transition of a solid directly to gas. it can be seen as temperature moves to the right at very very low pressures.
_____ bonds share electron pairs. Ionic Metallic Hydrogen Covalent
Answer:
Covalent Bonds
Explanation:
Got it right on Odessyware ;) Have a nice day!!!
Find the atomic numbers of the as yet undiscovered next two members of the series. radon
The atomic numbers of the as yet undiscovered next two members of the series are 118 and 168.
Further explanationThe noble gases is a group of chemical elements with similar properties such as under standard conditions they are all odorless, colorless, monatomic gases with very low chemical reactivity.
The heaviest known noble gas metal is radon, atomic number 86. Where The outermost shell configuration of radon is [tex]6s^2 6p^6[/tex]
Electronic configuration of the next noble gas is:
[tex][Rn]5f^14 6d^{10} 7s^2 7p^6[/tex]
Therefore, atomic number of the noble gas after Rn is 86+32 = 118
The atomic number is the number of protons found in the nucleus of every atom of that element.
Electronic configuration of still the next noble gas can be obtained by adding [tex]5g^18 6f^{14} 7d^{10} 8s^2 8p^6[/tex], which means 50 more electrons.
So the atomic number = 118 + 50 = 168
Therefore the atomic numbers of the as yet undiscovered next two members of the series are 118 and 168.
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Grade: 9
Subject: Chemistry
Chapter: the atomic numbers
Keywords: the atomic numbers, radon, Electronic configuration, electrons, the noble gas
How many protons and electrons are in the atom of sodium whose atomic number is 11?
The diameter of a human red blood cell is 0.000006m write this number using scientific notation a10b