What can you not put in pewter?
Answers
For for than 30 years, lead has not been allowed in pewter. Tennessee Pewter is fully lead-free and suitable for use with food.
Is it okay to use pewter for food?Lead-free and safe to use, modern pewter is a good choice. 95% tin, plus copper and antimony, are the main ingredients. "The items are guaranteed to be lead-free and quite safe to be used for all types of food and drink," one producer claimed.
The disappearance of pewter: why?Due to health concerns raised by the Lead content, pewters are no longer used in objects (such as cups, plates, or jewelry) that will come into touch with people's bodies.
To know more about pewter visit:-
https://brainly.com/question/29627686
#SPJ4
Related Questions
Vicky and omar have an unknown oxide. They mix it with water to form a solution then add universal indicator. The colour changes to orange. Which type of oxide do they have?.
Answers
Vicky and Omar mix the unknown oxide with water and then add universal indicator to the solution. The color changes to orange then, the oxide formed must be a weak acid.
Indicator
The substance that indicates visibly the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution by typically through a color change is known as an indicator. The last point is demonstrated by a physical modification of the reaction or by the addition of an extra reagent, both of which are referred to as indicators.
Thus, they mix it with water and then add universal indicator to the solution. The color changes to orange the oxide formed must be a weak acid.
Learn more about indicators from the link given below.
https://brainly.com/question/17112872
#SPJ4
A set of solubility data is given below.
What is the mass of the dry solute
recovered?
Sample
2
Temperature
(°C)
30.1
Boat Mass
(8)
0.730
Boat +
Solution (g)
0.929
Boat + Dry
(g)
0.816
Answers
Answer:
0.086
Explanation:
got it on acellus
The mass of the dry solute recovered from the given data is 0.086 g. Option C
To determine the mass of the dry solute recovered, we need to subtract the mass of the boat from the mass of the boat with the dry solute.
Given the data provided:
Boat Mass: 0.730 g
Boat + Solution: 0.929 g
Boat + Dry: 0.816 g
To find the mass of the dry solute, we subtract the boat mass from the boat + dry mass:
Mass of Dry Solute = (Boat + Dry) - (Boat Mass)
Mass of Dry Solute = 0.816 g - 0.730 g
Mass of Dry Solute = 0.086 g
Therefore, the correct answer is c) 0.086 g.
The mass of the dry solute recovered from the given data is 0.086 g. It is important to note that the mass of the dry solute is obtained by subtracting the mass of the boat from the mass of the boat with the dry solute, as the boat mass represents the weight of the empty boat or container used in the experiment.
For more such questions on solute visit:
https://brainly.com/question/25326161
#SPJ8
In the photo above what does the Frisbee represent? Explain why.
Answers
2. Which of the following best describes temperature? *
O Number of molecules
Motion of molecules
O Size of molecules
O Type of molecules
Answers
Answer:
motion of molecules because we gonna see which one is in a solid state and what's so ever
Question 5 OT 5
At which temperature do particles stop moving entirely?
O A. 0°C
O B. 32 K.
O C. 32°F
O D.OK
Answers
How many moles of N2 are needed to make 5.0 moles of NH3?
Answers
Answer:
The answer is "2.5 mole"
Explanation:
The reaction for producing \(NH_3\) can be defined as follows:
Reaction:
\(N_2+ 3H_2 \rightarrow 2NH_3\)
According to the above reaction, to produce 2 moles of \(NH_3\) we need 1 mole of nitrogen:
So, according to the question to produce 5.0 mole \(NH_3\) the required \(N_2\):
\(\Rightarrow \ 5.0 \ mole \ of \ NH_3 \times \frac{1 \ mole\ of \ N_2}{2 \ mole \ of NH_3}\\\\\Rightarrow 5.0 \times \frac{1}{2}\\\\\Rightarrow 2.5\ mole\\\)
To produce 5.0 mole \(NH_3\) we need 2.5 mole \(N_2\)
If corrosion is found within the body of a relief valve, the valve must be:
1.repaired.
2.reconditioned.
3.cleaned.
4.replaced
Answers
If corrosion is found within the body of a relief valve, it must be replaced. Option 4
Corrosion is a serious issue that can compromise the integrity of the valve and its ability to function properly. Repairing or reconditioning the valve may not be enough to ensure its safety and reliability. Cleaning the valve may remove surface rust, but if the corrosion has already penetrated the body of the valve, it cannot be salvaged.
Replacement of the valve is the safest and most effective solution to ensure that the system remains functional and safe. Regular inspection and maintenance can help prevent corrosion from occurring in the first place, and ensure that any issues are detected and addressed before they become a safety concern. Answer option 4.
More on corrosion: https://brainly.com/question/30057568
#SPJ11
Help asap and correct answer
The diagram below shows the branching tree diagram for cats. (5 points)
A slanting, horizontal line is shown. On the extreme left, there is a label that says Common Ancestor. Along the slanting, horizontal line there are five dots labeled from left to right with the following traits Four limbs, Amniotic egg, Fur, Shearing teeth, and Retractable claws. There is one vertical line between each of the consecutive five dots. The lines are labeled from the from left to right as Amphibians, Reptiles, Marsupials, Dogs, Cats.
Which characteristic is shared by the greatest number of organisms?
Amniotic egg
Four limbs
Fur
Retractable claws
Answers
Draw the condensed structure for each of the following: a. (Z)-1,3,5-tribromo-2-pentene, b. (Z)-3-methyl-2-heptene, c. (E)-1,2-dibromo-3-isopropyl-2-hexene, d. vinyl bromide, e. 1,2-dimethylcyclopentene, f. diallylamine
Answers
The condensed structure formula are where it shows all atom but will omits the vertical bonds and all the horizontal single bond.
The condensed structure formula is given as follows :
a) 1,3,5-tribromo-2-pentene = BrH₂CCH₂ - C = CH - CH₂Br
|
Br
b) 3-methyl-2-heptene = CH₃CH₂CH₂CH₂ - C = CH - CH₂
|
CH₃
c) 1,2-dibromo-3-isopropyl-2-hexene = CH₃CH₂CH₂ - C = C - CH₂Br
| |
CH₃CH₂ Br
|
CH₃
c) vinyl bromide = CH₂ = CHBr
e) diallylamine = CH₂ = CHCH₂ - NH - CH₂CH = CH₂
Thus, the condensed structure for the given compounds are given above.
To learn more about condensed structure here
https://brainly.com/question/27670671
#SPJ4
What is the formula for Water?
Name full name element's name
Answers
Answer:
2 Hydrogen atoms and 1 Oxygen atoms makes water
Explanation:
Hope this helps^^
Answer: Its chemical formula H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms,
Explanation: i hopes it helps :)
Mass in grams 1mole of Cu
Answers
3.01 x 1023 atoms Na
Answers
Answer:
3,079.23
Explanation:
why carbon nanotubes are ao strong?
Answers
The equilibrium constant Kc for C(s) + CO2(g) ⇋ 2CO(g) is 1.9 at 1000 K and 0.133 at 298 K. If excess C is allowed to react with 24.0 g of CO2 in a 5.00 L vessel at 1000 K, how many grams of CO are produced?
1. How many grams of C are consumed?
2. If a smaller vessel is used for the reaction, will the yield of CO be greater or smaller?
3. Is the reaction endothermic or exothermic?
Answers
1. The grams of CO produced can be calculated using stoichiometry based on the moles of \(CO_2\) and the reaction equation.
2. The grams of C consumed will be equal to the grams of \(CO_2\) used in the reaction.
3. The reaction is exothermic, as indicated by the decrease in equilibrium constant with decreasing temperature.
1. To determine the grams of CO produced, we need to calculate the moles of \(CO_2\) and use the stoichiometry of the reaction. Given that the reaction is
C(s) + \(CO_2\)(g) ⇋ 2CO(g)
The amount of \(CO_2\) is 24.0 g, we convert it to moles (using the molar mass of \(CO_2\)) and then use the mole ratio to find the moles of CO produced.
Finally, we convert the moles of CO to grams using the molar mass of CO.
2. To determine the grams of C consumed, we use the stoichiometry of the reaction. Since the reaction shows that 1 mole of C reacts with 1 mole of \(CO_2\) to produce 2 moles of CO, the moles of C consumed will be the same as the moles of \(CO_2\).
3. The equilibrium constant (Kc) at different temperatures can give us information about the reaction's exothermic or endothermic nature. In this case, as the equilibrium constant decreases from 1.9 at 1000 K to 0.133 at 298 K, it indicates that the forward reaction is exothermic (releasing heat).
To learn more about stoichiometry follow the link:
https://brainly.com/question/28780091
#SPJ4
Calculate the pH of a solution that is made by mixing 50.0 mL of 0.16 M acetic acid and 50.0 mL of 0.23 M sodium acetate. Express your answer to two decimal places.
Answers
the pH of the solution made by mixing 50.0 mL of 0.16 M acetic acid and 50.0 mL of 0.23 M sodium acetate is approximately 4.81.
To calculate the pH of the solution formed by mixing 50.0 mL of 0.16 M acetic acid and 50.0 mL of 0.23 M sodium acetate, we need to consider the dissociation of acetic acid (CH3COOH) and the formation of its conjugate base, acetate ion (CH3COO-).
The acetic acid acts as a weak acid and undergoes a partial dissociation in water:
CH3COOH ⇌ CH3COO- + H+
Sodium acetate, on the other hand, is a salt that dissociates completely in water to form sodium ions (Na+) and acetate ions (CH3COO-):
NaCH3COO → Na+ + CH3COO-
Since sodium acetate is a strong electrolyte, it will provide a source of acetate ions (CH3COO-) in the solution, which can react with any additional H+ ions from the acetic acid.
To calculate the pH, we need to determine the concentration of the common ion, acetate (CH3COO-), in the resulting solution. Since the volumes are the same (50.0 mL each), the concentrations of acetic acid and sodium acetate are equal after mixing.
First, let's calculate the initial moles of acetic acid and sodium acetate:
Moles of acetic acid = concentration of acetic acid × volume of acetic acid (in L)
Moles of acetic acid = 0.16 M × 0.050 L = 0.008 mol
Moles of sodium acetate = concentration of sodium acetate × volume of sodium acetate (in L)
Moles of sodium acetate = 0.23 M × 0.050 L = 0.0115 mol
Since acetic acid and sodium acetate have a 1:1 molar ratio, the moles of acetate (CH3COO-) in the solution are also 0.0115 mol.
Next, we calculate the total volume of the solution:
Total volume = volume of acetic acid + volume of sodium acetate
Total volume = 0.050 L + 0.050 L = 0.100 L
Now, we can calculate the concentration of acetate ions (CH3COO-) in the solution:
Concentration of acetate = moles of acetate / total volume
Concentration of acetate = 0.0115 mol / 0.100 L = 0.115 M
Since acetate ions can react with any additional H+ ions, the resulting solution will be a buffer. The pH of a buffer solution can be calculated using the Henderson-Hasselbalch equation:
pH = pKa + log([A-] / [HA])
In this case, acetic acid (CH3COOH) is a weak acid, and its pKa is 4.76. [A-] represents the concentration of acetate ions, and [HA] represents the concentration of acetic acid.
Using the Henderson-Hasselbalch equation:
pH = 4.76 + log(0.115 / 0.008)
Calculating this using a calculator, we find:
pH ≈ 4.81
Therefore, the pH of the solution made by mixing 50.0 mL of 0.16 M acetic acid and 50.0 mL of 0.23 M sodium acetate is approximately 4.81.
learn more about ph of a solution here:
https://brainly.com/question/15463092?referrer=searchResults
#SPJ11
Soaps feel slippery on our hands because they dissolve the oil on our skin, decreasing friction. This is because soap contains...
A) A neutral molecule.
B) A salt molecule
C) An acid
D) A base.
Answers
Answer:
D) A base.
Explanation:
A base in chemistry is something that is slippery, hence it being a soap.
Soaps feel slippery on our hands because they dissolve the oil on our skin, decreasing friction. This is because soap contains a base, hence option D is correct.
What is a base?A material that can neutralize an acid and receive hydrogen ions from water in chemistry. Bases can color certain colors blue and feel slippery or soapy on the skin.
A base is a molecule or ion that can take up an acid's hydrogen ion, sodium hydroxide is a good illustration of a base.
Any hydrogen-containing material that has the ability to donate a proton (hydrogen ion) to another chemical is considered an acid. Typically, sour tastes help to identify substances that are acidic.
Therefore, soaps remove the oil from our skin and reduce friction, they make our hands feel slippery. This is due to the base present in soap.
Learn more about base, here:
https://brainly.com/question/23687757
#SPJ5
for each mole of glucose (c6h12o6) oxidized by cellular respiration, how many moles of co2 are released in the citric acid cycle
Answers
For every mole of glucose (C6H12O6) that is metabolized by cellular respiration, this citric acid cycle releases 4 moles of CO2.
What is respiration in human biology?Through respiration, which involves consuming oxygen and exhaling carbon dioxide, living beings generate energy. Respiration is a substantial and crucial gas exchange mechanism, it follows. The carbon and oxygen used in breathing are transported via the blood.
What is respiration and types?The phrase "respiratory system" actually is the process by which food is metabolized to produce energy. Both aerobic and anaerobic respiration are the two types. Aerobic respiration is defined as respiratory that takes place while there is air containing oxygen.
To know more about respiration visit:
brainly.com/question/14813909
#SPJ4
A chemist sets up a chemical reaction but finds that none of the reactant molecules have the required activation energy. What is the result?
A.
Products will form with less energy input.
B.
No products will be formed.
C.
The products will form too quickly.
D.
Products will convert to reactants.
Answers
Answer:
B.
No products will be formed.
which of the following molecules can form hydrogen bonds with others like it?
Answers
Answer:
nitrogen, oxygen and fluorine
OSTOICHIOMETRY
Using molarity to find solute moles and solution volume
A chemist adds 440.0 mL of a 1.46M barium acetate
added to the flask. Round your answer to 3 significant digits.
mol
be (Ba(C₂H₂O₂),) solution to a reaction flask, Calculate the millimoles of barium acetate the chemist has
X
Calculator
542400
Maribel V
do
Answers
The chemist has 642.4 millimoles of barium acetate in the solution.
To calculate the millimoles of barium acetate (Ba(C₂H₃O₂)₂) in the solution, we can use the formula:
moles = molarity × volume (in liters)
First, let's convert the volume from milliliters (mL) to liters (L):
440.0 mL ÷ 1000 = 0.440 L
Now we can substitute the given values into the formula:
moles = 1.46 M × 0.440 L
moles = 0.6424 mol (rounded to 4 decimal places)
To convert the moles to millimoles, we multiply by 1000:
millimoles = 0.6424 mol × 1000
millimoles = 642.4 mmol (rounded to 3 significant digits)
Therefore, the chemist has 642.4 millimoles of barium acetate in the solution.
It's important to note that the molarity (M) represents the number of moles of solute per liter of solution. By multiplying the molarity by the volume in liters, we can find the number of moles of solute. To convert moles to millimoles, we multiply by 1000. The result represents the millimoles of barium acetate present in the given volume of solution.
For more such questions on barium acetate visit:
https://brainly.com/question/15304103
#SPJ8
Why do planets orbit faster as they get closer to the Sun?
The orbit becomes smaller closer to the Sun.
The orbit becomes smaller closer to the Sun.
The eccentricity changes as the planet gets closer to the Sun.
The eccentricity changes as the planet gets closer to the Sun.
The force of gravity increases closer to the Sun.
The force of gravity increases closer to the Sun.
The Sun's magnetism causes a "sling shot" effect.
Answers
Explanation:
The speed at which a planet orbits the Sun changes depending upon how far it is from the Sun. When a planet is closer to the Sun the Sun’s gravitational pull is stronger, so the planet moves faster. When a planet is further away from the sun the Sun’s gravitational pull is weaker, so the planet moves slower in its orbit.
How many moles are present in 12.5 L of a 0.750M NaNO3 solution?
Answers
Answer:
9.38 moles NaNO₃
Explanation:
Given the measurements provided, the best way to find moles is by using the molarity formula. The molarity formula is:
Molar concentration (M) = moles / volume (L)
Therefore, plug the provided values into the formula, then isolate to find moles.
Molar concentration (M) = moles / volume (L)
0.750 M = moles / 12.5 L
(0.750 M) x (12.5 L) = moles
9.38 = moles
4.3. Miscellaneous metalwork is most frequently fabricated from A. iron.
B. aluminum.
C. copper.
D. steel.
Answers
Miscellaneous metalwork is most frequently fabricated from D. steel. Steel is a versatile and strong material, making it a popular choice for various metalwork projects.
Steel is a strong, durable, and versatile metal that is relatively inexpensive and easy to work with. It is a common choice for many metalworking applications due to its ability to be formed, machined, and welded into a variety of shapes and sizes. Steel has excellent corrosion resistance, making it a popular choice for outdoor applications such as railings, fencing, and signposts. It also has a high melting point, allowing it to withstand extreme temperatures. Other metals such as iron, aluminum, and copper can also be used for miscellaneous metalwork fabrication, however steel is the most common material due to its strength, cost, and versatility.
To learn more about steel click here https://brainly.com/question/17371354
#SPJ11
how many grams of methane are inside the container if there are 34.4 L of gas at 15.0 C and 0.989 atm?
Answers
The amount of methane inside the container if there are 34.4 L of gas at 15.0 C and 0.989 atm is 23.02 grams.
How to calculate mass?The mass of methane in a container if there is a specific volume and temperature can be calculated as follows;
PV = nRT
Where;
P = pressureV = volumen = no of molesR = gas law constantT = temperature0.989 × 34.4 = n × 0.0821 × 288
34.0216 = 23.6448n
n = 34.0216 ÷ 23.6448
n = 1.44 moles
molar mass of methane = 16g/mol
mass = 16 × 1.44 = 23.02 grams
Learn more about mass at: https://brainly.com/question/20552052
#SPJ1
Does the Earth stay in one place throughout the year? If not, describe its motion and location in the solar system?
I NEED HELP THIS DUE I 2 HOURS
Answers
There are two kinds of motion that earth possess, one is rotation and other is revolution. Therefore, earth does not stay in one place throughout the year. The earth revolves and spins around the sun. The Earth is situated between Venus and Mars.
What is rotation?The motion of the earth around its axis is known as rotation. Revolution refers to the motion of the earth about the sun in a fixed route or orbit. The earth's axis, which is an invisible line, forms a 6612° angle with its planet's orbit.
No, the earth does not remain stationary throughout the year. The Earth revolves around the sun. The earth revolves and spins around the sun. The Earth is situated between Venus and Mars, therefore it is neither too hot nor too cold.
Therefore, earth does not stay in one place throughout the year. The earth revolves and spins around the sun. The Earth is situated between Venus and Mars.
To know more about rotation, here:
https://brainly.com/question/16455426
#SPJ2
What is the wavelength of electromagnetic radiation which has a frequency of 4.464 x 10^14 s-1
a. 1.338 x 10^23 m
b. 1.489 x 10^-6 m
c. 6.716 x 10^-7 nm
d. 671.6 nm
Answers
Answer:
d. 671.6 nm
Explanation:
It is possible to solve the wavelength of a radiation from its frequency -or vice versa- using:
λ = c / f
Where λ is wavelength,
c is speed of light, a constant (2.998x10⁸m/s)
And f is frequency: 4.464x10¹⁴s⁻¹
Replacing:
λ = 2.998x10⁸m/s / 4.464x10¹⁴s⁻¹
λ = 6.716x10⁻⁷m
As 1m = 1x10⁹nm:
6.716x10⁻⁷m * (1x10⁹nm / 1m) = 671.6nm
Right answer is:
d. 671.6 nm
Which statement describes the relationship between bonding and surface tension?
A. The more ionic bonds a molecule can make, the lower the surface tension.
B. The more ionic bonds a molecule can make, the higher the surface tension.
C. The more hydrogen bonds a molecule can make, the higher the surface tension.
D. The more hydrogen bonds a molecule can make, the lower the surface tension.
Answers
Answer:
The more hydrogen bonds a molecule can make, the higher the surface tension.
Explanation:
The more hydrogen bonds a molecule can make, the higher the surface tension. Therefore, this statement best describes the relationship between bonding and surface tension.
What is surface tension?Surface tension exists property of a liquid surface indicated by its acting as if it existed as a stretched elastic membrane. This phenomenon can be regarded in the nearly spherical shape of small drops of liquids and soap bubbles. Because of this property, specific insects can stand on the surface of the water. A razor blade also can be sustained by the surface tension of water. The razor blade exists not floating: if pushed via the surface, it descends via the water.
Hence, The more hydrogen bonds a molecule can make, the higher the surface tension. Thus, this statement best represents the connection between bonding and surface tension.
Therefore, (C) option is the correct answer.
To learn more about Surface Tension, refer here : https://brainly.com/question/22484004
#SPJ2
PLEASE HELP! 100 POINS AND I WILL GIVE BRAINLIEST!!!
A plane is experiencing a LOT of problems because of a storm in the area. Is the plane flying in the troposphere or the stratosphere?
Answers
The plane is mostly flying in the troposphere layer. This is because there is more turbulence.
Hope it helps you...
Hope it helps you...Answered by Benjemin ☺️
Answer:
Explanation:
no ask your teacher
PLEASE ANSWER QUICKLY, THIS NEEDS TO BE DONE BY TOMORROW!!!
Answers
es with hydrogen
atoms
Fill the valencies with
C
+
() C c-c=c
(ii)
(
c
C - C = C
/
c
(ii)
c
- C
با
-
1
c - c
С — С
co
Answers
Answer:
all u have to do is inserting hydrogen atoms where it's possible, if carbon is not bonded to any element, then it can have 4 hydrogens. for the first chain, the first carbon can have 3 hydrogen atoms, the second carbon 1 hydrogen atom only the third also 1 hydrogen since there is double bond and the 4th 2 hydrogen atoms
Answer:
a rat and a cat can have sex
xD
Explanation: