The most effective approach to check for lead in pewter is to use a lead test kit from the hardware store. Swabbing a metal surface with test chemicals.
What is pewter?As a hardening agent, pewter is a tin-based alloy with varying quantities of antimony, bismuth, copper, and lead.The best method for testing for lead in pewter is to use a lead test kit from a hardware shop. It doesn't tarnish and keeps its color and shine for a very long time. Typically, pewter work is cast, followed by further finishing processes including hammering, turning on a lathe, burnishing, and occasionally engraving. Snuffboxes are one item that was made from various pewter components and then soldered together.Because of the health risks associated with Lead, pewters are no longer used in products that will come into touch with people's bodies, such as cups, plates, and jewelry.For more information on pewter kindly visit to
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Finish the essay technology improves nursing
Technology has helped correct medical errors with safety checks, finding an early diagnosis of a disease, and more. Technology is a huge part of nursing........
Answer: come on man its not that hard
Explanation:
How many molecules of carbon dioxide, CO2, are in 38.5 moles?
Answer:
2.31847E25
Explanation:
One mole of anything contains 6.022 x 10^23 items.
how acceptance of responsibility influence affective in communication
Answer:
f
Explanation:
How is the chemical bonding between atoms of magnesium different from the chemical bonding within a crystal of aluminum iodide?
Answer:
See explanation
Explanation:
The bond between magnesium atoms is a metallic bond while the bond within a crystal of aluminum iodide is an ionic bond.
A metallic crystal consists of a sea of electrons that are electrostatically attracted to positive metal ions. This is the nature of the bonding between magnesium atoms in a crystal of magnesium.
In aluminum iodide, there is a transfer of electrons from aluminium to iodine which is typical of an ionic bond. Electrostatic interaction holds oppositely charged ions together in the crystal of aluminum iodide.
Lyle filled a glass bottle completely with water. He put the lid on tightly, then put the water in the freezer to cool it down quickly. Lyle forgot about his water until the next day. When Lyle took his bottle out of the freezer, all the water was frozen solid. The bottle had cracked in several places and was broken. If water in the ground acts like water in the bottle when it freezes, how does water in the ground affect layers of rock and soil
Answer:
The answer would be It breaks them up.
Explanation:
help me pretty please
Answer:
If i had to take a stab at it would say C
Explanation:
Answer:
I think it might be C but not 100% sure.
Explanation:
When the object transmits all color frequencies.
Calculate the density of carbon dioxide at STP
Answer:
Density = mass/volume
= 44/22.4
= 1.96 gram/liter
The density of the Carbon Dioxide at S.T.P. (Standard Temperature and Volume) is 1.96 gram/liter.
Windmills are sometimes helpful for some small rural communities.
True
False
Answer:
true
Explanation:
Number 6
Metals react with _______ to form co.pounds that are like alkaline.
A. Non metals
B. Oxygen
C. Hydrogen
D. Metalloids
Answer:
B) Oxygen atoms
Explanation:
When metals react oxygen atom then they tend to form metal oxides which are basic in nature. This is because when metal oxides are added in water then it results in the formation of metal hydroxides which are alkaline in nature
What mass of sodium phosphide would be needed to react fully with 5.4x1025 formula units of
strontium oxide?
Answer:
5974 g of Na₃P
Explanation:
We determine the reaction:
2Na₃P + 3SrO → 3Na₂O + Sr₃P₂
2 moles of sodium phosphide react to 3 moles of strontium oxide to produce 3 moles of sodium oxide and 1 mol of strontium phosphide.
We know that 1 mol of anything contains 6.02×10²³ formula units, so:
5.4×10²⁵ formula units . 1 mol/6.02×10²³ formula units = 89.7 moles
This is the amount we have, initially for SrO.
Ratio is 3:2. 3 moles of SrO react to 2 Na₃P
Then 89.7 moles of SrO may react to (89.7 . 2) /3 = 59.8 moles of Na₃P
We convert the moles to mass (mass . molecular weight)
59.8 mol . 99.9 g /mol = 5974 g
How many moles are in 100.0g of gold
3. The density of ethanol is 0.789 g/mL. How many grams of ethanol should be mixed with 225 mL of water to make a 4.5% (v/v) mixture?
Answer:
I don't know what to say sorry
How many particles are in a 34 g sample of Al2(SO4)3?
please help!
Answer:
5.98 × 10^22 particles
Explanation:
To get the number of particles (nA) in a substance, we multiply the number of moles of the substance by Avogadro's number (6.02 × 10^23)
The mass of Al2(SO4)3 given in this question is as follows: 34grams.
To convert this mass value to moles, we use;
Mole = mass/molar mass
Molar Mass of Al2(SO4)3 = 27(2) + {(32 + 16(4) }3
= 54 + (32 + 64)3
= 54 + 288
= 342g/mol
mole (n) = 34/342
n = 0.0994mol
number of particles (nA) of Al2(SO4)3 = 0.0994 × 6.02 × 10^23
= 0.598 × 10^23
= 5.98 × 10^22 particles
PLEASE HELP ME
What answer is it?
Over millions of years silt washed into a lake formed layers of sedimentary rock. What type of rock was likely formed?
Answer:
Explanation:
siltstone
Over millions of years, silt washed into a lake formed layers of sedimentary rock. What type of rock was likely formed? A type of detrital sedimentary rock called siltstone was the likely product of this process.
what are the five major types of celestial bodies in the solar system
Answer:
the Sun, planets, satellites, comets, asteroids and meteoroids.
Explanation:
hope it helps :)
pleaaseeee help im failing so bad3
What do we examine to understand the differences between the different states of matter?
A. Electronegativity of the matter present
B. Moles of matter present.
C. Behavior of the particles
D. Size of the particles
Answer:
C. Behavior of the particles
mako mermaids or h20 mermaids? i like mako mermaids better lol i've been watching it since forever.:))
Answer:
H2O: Just Add Water for me
Explanation:
I loved Mako Mermaids too, though I thought the spinoff was lazy with conforming to the canon; how could the pod have inhabited Mako Island for thousands of years but were never seen in H2O?
If 0.590 moles of a gas are found in a 9.25 L container at 1.27 atm, what is the temperature?
Answer:
???????????
Explanation:
Help asp please thanks
chelp meeee this is science btw but eahhhh
Answer: KCIO3
Explanation:
The graph shows that it is the lowest at 0 degrees meaning that it has the lowest solubility
Answer:
KOL c
Explanation:
The pH of tomato juice is 4, thus tomato is a (an) _______________ substance
Answer:
Acidic
Explanation:
pH from 0-6.9 are acidic substances
pH of 7 are neutral
pH above 7 to 14 are badic substances
Answer: Acidic
Explanation:
PH of 1-6 is considered acidic.
PH of 7 is neutral.
PH of 8-14 is considered basic (alkaline)
How many mL of a 1.63 M solution would contain 12 g of Na(OH)?
Answer:
89 mL of solution would contain the given amount of Al(NO₃)₃.
Explanation:
Hope this help
which pollutants come from air? How and why do these form?
Answer:
Air pollution is caused by solid and liquid particles and certain gases that are suspended in the air. These particles and gases can come from car and truck exhaust, factories, dust, pollen, mold spores, volcanoes and wildfires.
Explanation:
Which of the following phases of matter has a fixed volume but not a fixed shape?
A Liquid B Gas C Solid D Plasma
Answer:
C. solidExplanation:
Solid is a hard and not able to flow; not like a liquid or gas. Having no holes; not hollow. Something that is not liquid and gas. Solid has fixed volume but not a fixed shape.
The liquid is something that flows freely; a substance that is not solid or gas.
Gas is a substance that neither liquid nor solid, e.g. air.
Plasma is an electrically neutral ionized gas in an electric discharge; distinctly different from solids and liquids and normal gases.
Therefore, the correct answer is C. solid.
Answer:
A. Liquid
Explanation:
the guy above me is wrong
neeed morreeeee help w science
Answer:
60
Explanation:
Answer:
its actually 83° rounding it so choose that
10.00 g of O2 reacts with 20.00 g NO Determine the amount of NO2, limiting reactant, and the excess reactant.
Answer:
Limiting reactant: O₂
Excess reactant: NO
Amount of NO₂ produced: 28.75 g
Explanation:
The balanced equation for the reaction between O₂ and NO to produce NO₂ is the following:
O₂(g) + 2NO(g) → 2NO₂(g)
According to the equation, 1 mol of O₂ reacts with 2 moles of NO to produce 2 moles of NO₂.
We first convert the moles of each compound to mass by using the molecular weight (MW):
MW(O₂) = 16 g/mol x 2 = 32 g/mol
⇒ mass O₂ = 1 mol O₂ x 32 g/mol O₂ = 32 g
MW(NO) = 14 g/mol + 16 g/mol = 30 g/mol
⇒ mass NO = 2 mol NO x 30 g/mol NO = 60 g
MW(NO₂) = 14 g/mol + (2x 16 g/mol) = 46 g/mol
⇒ mass NO = 2 mol NO₂ x 46 g/mol NO₂ = 92 g
For the reactants, the stoichiometric ratio is 32 g O₂/60 g NO. Thus, the mass of O₂ required to completely react with 20.00 g of NO is:
mass of O₂ required = 20.00 g NO x 32 g O₂/60 g NO = 10.67 g O₂
We need 10.67 g of O₂ and we have only 10.00 g, so the limiting reactant is O₂. Thus, the excess reactant is NO.
With the limiting reactant, we calculate the amount of product produced (NO₂). For this, we consider the stoichiometric ratio 92 g NO₂/32 g O₂:
mass of NO₂ produced = 10.00 g O₂ x 92 g NO₂/32 g O₂ = 28.75 g NO₂
An atom of a certain element has 19 protons, 19 electrons, and a mass number of 39. This element is very reactive. How many neutrons are in this atom?
Answer:
There would be [tex]20[/tex] neutrons in that atom.
Explanation:
The mass number of an atom is the sum of:
the number of neutrons in this atom, andthe number of protons in this atom.Electrons do not contribute to the mass number of an atom.
From the question:
Mass number of this atom: [tex]39[/tex].Number of protons in this atom: [tex]19[/tex].[tex](\text{Mass Number}) = (\text{Number of protons}) + (\text{Number of neutrons})[/tex].
In this atom:
[tex]39 = 19 + (\text{Number of neutrons})[/tex].
Hence, the number of neutrons would be [tex]39 - 19 = 20[/tex].
6) A student measures out 96.21 g of sulfur for an experiment. How many moles of Sulfur are in this
sample? (show your work!)
Atomic mass of Sulfur = 32g
32g of Sulfur is one mole.
1g of Sulfur is [tex] \frac{1}{32} moles [/tex]
96.21g of Sulfur is [tex] \frac{96.21}{32} moles=> 3moles(appx) [/tex]
Answer:
[tex]\boxed {\boxed {\sf 3 \ moles \ sulfur}}[/tex]
Explanation:
To convert from grams to moles, the molar mass is used. This value is the number of grams in 1 mole of a substance and it can be found on the Periodic Table. Look for Sulfur or S.
Sulfur: 32.07 g/molWe use this as a ratio.
[tex]\frac {32.07 \ g \ S}{1 \ mo;\l\ S }[/tex]
Multiply by the given number of grams.
[tex]96.21 \ g \ S*\frac {32.07 \ g \ S}{1 \ mo\l\ S }[/tex]
Flip the fraction so the grams of sulfur cancel out.
[tex]96.21 \ g \ S*\frac {1 \ mol \ S}{32.07 \ g \ S }[/tex]
[tex]96.21*\frac {1 \ mol \ S}{32.07 }[/tex]
[tex]\frac {96.21 \ mol \ S}{32.07 }= 3 \ mol \ S[/tex]
96.21 grams of sulfur is equal to 3 moles of sulfur.