First convert mass to number of moles. Molar mass of H2C2O2 • 2H2O = 94 / mol
1.89g / (94 g / mol) = .02 mol H2C2O2 • 2H2O
Then we divide by 0.1 L, or 100 mL, and we get a concentration of 0.2 M.
Since there are two positive ions (2 H+), therefore normality is:
0.4 N
According to its nutrition label, orange soda contains 49g of sugar per 355 ml serving. if the density of the beverage is 1.043 g/ml, what is the percent sugar concentration in orange soda
The percent sugar concentration of orange soda is calculated by dividing the mass of the sugar by the total mass of the beverage and multiplying by 100. For a 355 mL serving of soda with a density of 1.043 g/mL and sugar content of 49g, the percent sugar concentration is approximately 13.24%.
Explanation:The question asks to calculate the percent sugar concentration in orange soda, given the amount of sugar and the volume and density of the soda. The mass of the beverage can be calculated by multiplying its volume by the density, and the percent concentration is then obtained by dividing the mass of sugar by the total mass of the solution and multiplying by 100.
To find the mass of the soda, we use the formula: mass = volume × density. So, for a 355 mL serving with a density of 1.043 g/mL, the mass of the soda is calculated as follows:
Mass of soda = 355 mL × 1.043 g/mL = 370.265 g
Next, we calculate the percent concentration of sugar:
Percent sugar concentration = (mass of sugar / total mass of the beverage) × 100
Percent sugar concentration = (49g / 370.265g) × 100
Percent sugar concentration ≈ 13.24%
Therefore, the percent sugar concentration of the orange soda is approximately 13.24%.
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.
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.
A beaker contains a clear, colorless liquid. part a if it is water, how could you determine whether it contained dissolved table salt? do not taste it!
To determine if a beaker of clear, colorless liquid has dissolved salt, you can perform several tests such as a conductivity test, density comparison (float an egg), evaporation to observe residue, or a silver nitrate test to check for the presence of chloride ions.
Explanation:To determine whether a clear, colorless liquid in a beaker has dissolved table salt, one can't rely on sight, taste, or smell as salt solution is clear, odorless, and we want to avoid tasting it. However, one can utilize certain properties of salt when it's in a solution.
One such property is that a salt solution conducts electricity. This is due to the presence of ions in the solution formed when the salt, sodium chloride (NaCl), dissolves into sodium ions (Na+) and chloride ions (Cl-). You can perform a simple conductivity test. If the solution conducts electricity, it could signify the presence of table salt in the water.
Another method can be based on the principle of density. Salt water has a higher density than pure water. One way to use this difference is to float an egg in the solution. If an egg floats, there is a good chance the water contains salt because the salt increases the water's density, allowing the egg to float.
Evaporation is another method. By carefully evaporating the water, one would be left with any soluble substances that were present. If there are white, crystalline residues (which are characteristic of table salt), it indicates that the liquid contained dissolved table salt.
Lastly, a silver nitrate test could also be done. If you add a few drops of silver nitrate solution to the sample, and a white precipitate forms, this indicates the presence of chloride ions and hence, salt in the solution.
Learn more about Dissolved Salt Detection here:https://brainly.com/question/25269562
#SPJ12
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).
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.)
1.50μm2. Convert this to square meters.
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
If you’re measuring water in a graduated cylinder that’s marked off in mL
and it looks like the water level falls halfway in between the 1 and 2 mL
marks, how would you record the measurement? What if it looks like the
water level were right at the 1 mL mark? How would your measurements
change if your graduated cylinder was marked off by 10 mL instead of 1 mL?
Which substance can not be broken down by a chemical change?
a.ammonia
b.methanol
c.propane
d.phosphorus?
When an atom combines chemically with another atom it either gains loses or shares?
what are the most common student injuries in the chemistry lab and how can they be prevented
You’ll soon make two pieces of ice with the approximate shapes shown in the image. Both pieces of ice have the same mass and volume. How are the two shapes different from one another?
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.
Learn more about Atomic Structure of Calcium Isotope here:https://brainly.com/question/13383157
#SPJ12
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.
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
Discuss why the formation of membranes helped in the development of more complex life forms.
The diameter of a human red blood cell is 0.000006m write this number using scientific notation a10b
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.
Learn moreLearn more about the atomic numbers https://brainly.com/question/1379579Learn more about radon https://brainly.com/question/9112754Learn more about Electronic configuration https://brainly.com/question/549647Answer details
Grade: 9
Subject: Chemistry
Chapter: the atomic numbers
Keywords: the atomic numbers, radon, Electronic configuration, electrons, the noble gas
. 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
Which reagent is the limiting reactant when 0.550 mol Al(OH)3 and 0.550 mol H2SO4 are allowed to react?
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.
Calculate the density of a material that has mass of 52.457g and a volume of 13.5 cm3
How do the general methods for separating mixtures and compounds differ?
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]
_____ bonds share electron pairs. Ionic Metallic Hydrogen Covalent
Answer:
Covalent Bonds
Explanation:
Got it right on Odessyware ;) Have a nice day!!!
Butane, ch3-ch2-ch2-ch3, is a hydrocarbon fuel used in lighters. how many moles of molecules are there in a 350. gram sample of butane
Scientists can find new discoveries that change their current understanding of scientific knowledge.
True or False?
yea the answer is true
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 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.