Answer:
If the half-life of radon-222 is 3.82 days, then how much of a 10.0 gram sample of radon-222 would be left after 7.64 days
✓ 2.50g
Explanation:
How much work is done on a pumpkin with a force of 16 newtons when you lift is 15 meters?
Answer:
[tex]^{}[/tex]wer here. Link below!
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bit.[tex]^{}[/tex]
Explanation:
acetic acid reacts with copper
Answer:
pure copper does not react with acetic acid.
How do you solve this ?
Answer:
How many grams Ni in 1 mol? The answer is 58.6934.
We assume you are converting between grams Ni and mole.
You can view more details on each measurement unit:
molecular weight of Ni or mol
The SI base unit for amount of substance is the mole.
1 grams Ni is equal to 0.017037690779543 mole.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between grams Ni and mole.
Type in your own numbers in the form to convert the units!
hope that help
Explanation:
Answer:
0.05 moles
Explanation:
In a mole of any substance, there exist 6.02
⋅ 10
^23 units of that substance.
So here, we got:
3.01 ⋅ 10^22 Mg atoms ⋅ 1 mole / 6.02 ⋅ 10^23 Mg atoms
= 0.05 moles
Hope that helps!
why is helium not considered a molecule
Answer:
Its unreactive since its outer shell is filled up and also does not form a covalent bonding.
Energy is transferred from the sun to the surface, and then to the air. Why?
Answer: The sun's radiation strikes the ground, thus warming the rocks. As the rock's temperature rises due to conduction, heat energy is released into the atmosphere, forming a bubble of air which is warmer than the surrounding air.
Explanation:
A body parts where the two bones meet in order to move
the answer should be joint
Using what you can recall from this unit, write one or two short paragraphs describing John Dalton’s atomic model. If needed, search the Internet for descriptions of the model.
Answer:
Five points of Dalton's atomic theory:
1) all elements are made up of atoms.
2) atoms are so small that they cannot be divided any further.
3) an atom can neither be destroyed nor be formed.
4) atoms of an element are similar, they possess the same mass and same properties.
5) atoms of different elements combine in a definite ratio to form compounds.
Due to further experimentation, it was concluded that an atom is made up of small particles identified as protons, neutrons, and electrons. They can be further subdivided.
Another change is the presence of isotopes of atoms of different elements. Hence, atoms of the same element can also have different masses.
Hope this helps, have a nice day/night! :D
As per Dalton's atomic model atoms are the minuscule, distinct building blocks of all stuff.
What is Dalton's atomic model?
Dalton proposed that the concept of atoms may be used to explain the laws of conservation of mass as well as definite proportions. He proposed that atoms, of the kind, that he described as "solid, tightly compacted, hard, impenetrable, moving particle," are the smallest, indivisible units of matter.
Dalton's atomic model is as fellow:
Atoms are the minuscule, distinct building blocks of all stuff.Atoms are unbreakable and undividable.An element's atoms all have the same weight and other characteristics.Atoms of various elements have varying masses.To know more about Dalton's atomic model.
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how many valence electrons does the neon family have
Answer: 8 valence electrons
Explanation:
Answer:
8 valnce electrons.
Explanation:
Neon is part of the Noble Gases family, which naturally have a full outer shell or 8 valence electrons in its natural form.
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Vhat determines a substance's state of matter?
calculate the average atomic mass of chlorine if its abundance in nature is 75.77 percent 35cl, an 24.23 percent 37cl
Answer:
Average atomic mass of chlorine =
100
75.77×34.9689+24.23×36.9659
=35.45 g/mol.
Answer:
35.4846.
Explanation:
35 * 0.7577 + 37*0.2423
Can someone please help me with this asap? I’ll mark brainliest.
Answer:
Cup b has more thermal energy because it has a higher measured temperature
Cub b has more thermal energy because it has a higher surface area and volume
Ice cools the temperature of the water as the heat leaves it and causes the ice to melt due to the heat received
The ice takes the heat from the water
Explanation:
Write balanced, net ionic equations for the reactions shown below. Identify the spectator ions. (40
points possible: 8 points per problem = 4 points for net ionic equation, 4 points for spectator ions)
a. Sr(NO3)2 (aq) + H2SO4 (aq) → SrSO4 (s) + 2HNO3 (aq)
Taking into account the definition of net ionic equation, the net ionic equation is Sr²⁺(aq) + 2 SO₄⁻(aq) → SrSO₄ (s) and H⁺ and NO₃⁻ are the spectator ions.
The net ionic equation is a chemical equation for a reaction that lists only the species that participate in the reaction.
In other words, an ionic equation is a chemical equation where electrolytes in aqueous solution are written as dissociated ions. Usually this is a salt dissolved in water, where the ionic species are followed by (aq) in the equation, to indicate that they are in aqueous solution.
The balanced equation will be:
Sr(NO₃)₂ (aq) + H₂SO₄ (aq) → SrSO₄ (s) + 2 HNO₃ (aq)
where (aq) means aqueous and (s) solid.
Taking into account that:
All salts of NO₃⁻, C₂H₃O₂⁻, ClO₃⁻ and ClO₄⁻ are soluble.The total ionic equation in separated aqueous solution will be:
Sr²⁺(aq) + 2 NO₃⁻(aq) + 2 H⁺(aq) + 2 SO₄⁻(aq) → SrSO₄ (s) + 2 NO₃⁻(aq) + 2 H⁺(aq)
A spectator ion is an ion that appears both as a reactant and as a product in an ionic equation.
Spectator ions can be either cations (positively charged ions) or anions (negatively charged ions).
When writing a net ionic equation, spectator ions found in the original equation are ignored. Thus, the total ionic reaction is different from the net chemical reaction.
In this case, H⁺ and NO₃⁻ are the spectator ions because they appear unchanged in both the product and the reagent. So these ions cancel out by writing the net ionic equation and you get:
Sr²⁺(aq) + 2 SO₄⁻(aq) → SrSO₄ (s)
In summary, the net ionic equation is Sr²⁺(aq) + 2 SO₄⁻(aq) → SrSO₄ (s) and H⁺ and NO₃⁻ are the spectator ions.
Learn more:
brainly.com/question/18896765?referrer=searchResults brainly.com/question/10553963?referrer=searchResults brainly.com/question/7018960 brainly.com/question/24099019?referrer=searchResults brainly.com/question/10538922?referrer=searchResultsWhich characteristic do electronegativity differences indicate about reactions between atoms
O bond number
O compound energy storage
O valence electron number
O bond type
Answer:
valence electron number
Explanation:
trust me
Valence electron number is the characteristic do electronegativity differences indicate about reactions between atoms. Hence option C is correct.
What is electronegativity?Electronegativity is defined as the propensity for atoms involved in covalent bonds to draw the bonding electrons. An indicator of how strongly atoms draw bonding electrons to them is their electronegativity. How polar a bond is depends on the difference in electronegativity between two atoms. Since there is no difference in electronegativity between the two identical atoms in a diatomic molecule, the bond is nonpolar or pure covalent.
Valence electron number is defined as an atom's associated outer shell electron that, if the outer shell is open, can take part in the formation of a chemical bond.
Thus, valence electron number is the characteristic do electronegativity differences indicate about reactions between atoms. Hence option C is correct.
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maple syrup physical property description
-
-
-
-
-
Answer:
Maple syrup has nutraceutical potential given the macronutrients (carbohydrates, primarily sucrose), micronutrients (minerals and vitamins), and phytochemicals (primarily phenolics) found in this natural sweetener.
Explanation:
Heat can never flow from........ I need this asap Pls
A. Solid to liquid
B. Hot to cold
C. Cold to hot
D. Liquid to solid
Claire is a middle school student on her way to school one day she saw a puddle in the road when she returns home after school the puddle was gone what happens to the water in the puddle
The water in the puddle had vanished, leaving nothing behind. Water moves from the Earth's surface to the atmosphere via evaporation.
What is evaporation ?A liquid transforms into a gas during evaporation. It is simple to picture when puddles of rain "vanish" on a hot day or when wet clothing dries in the sun.
In these instances, the liquid water is evaporating into a gas known as water vapor rather than really dissipating. Global evaporation takes place.
Heat energy causes the bonds holding the water molecules together to fall apart, which causes evaporation. On the stove, adding heat to liquid water is what you do when you boil water.
Steam is created when water changes from a liquid form to a gaseous state (water vapor) due to the bonding being broken by the additional heat.
Thus, evaporation takes place in this process.
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5
Carbon and other nonmetals are found in which area of the periodic table?
a. on the left-most side
b.
on the right side
c. in the middle column of the periodic table
d. in the bottom rows
Answer:B
Explanation:
The metals are to the left of the linethe nonmetals are to the right of the line, and the elements immediately adjacent to the line are the metalloids.
An unknown solution contain 38.5 % of solute and 61.5 % of solvent. This solution is __________. *
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
The solution is a dilute solution because the concentration of solute is less than that of concentration of solvent ~
Answer:
[tex]dilute \: solution[/tex]
I HOPE IT IS HELPFULin what environments does low pressure/high temperature metamorphism occur?
Answer:
High- pressure/low-temperature (HPLT) metamorphism is believed almost exclusively to occur at such cool conditions inside the convergent plate margins.
Explanation:
Hope it helps:)
Balancing Chemical Equation
cl2+Nabr=NaCl+Br2
Answer:
Cl2 + 2Nabr = 2NaCl+Br2
Explanation:
Add coefficients to make sure you have the same number of atoms on each side.
Need Help!Chemistry! No links,no guessing please.
Answer: The answer is two.
Explanation: The answer is two because it represents a molecule having a nonpolar convalent bond.
Rb2SO4 is the formula for
Answer:
Rubidium sulfate !! Hope this helps <3
12. How do you measure the volume of an ir regular solid? (describe and give the name for
procedure)
Answer:Year after year, J.Gilbert’s has clinched the “Best Entrée” title at the lauded Taste of Worthington Festival. And we’re often called “Worthingon’s Best Kept Secret.” Some consider us the best steakhouse in Worthington. Others simply consider us the best restaurant in Worthington. Enjoy our Prime wood-fired steaks and seafood – inspired by Kansas City-steakhouse fare – in a luxe, yet warm atmosphere, all served with impeccable care.
Explanation:
a.
Which of the following might be affected by the loss of a plant species?
Only organisms that feed directly off the lost plant species we be affected.
b. Other plant species will be affected, but no other organisms will
c. Multiple organisms may be affected by the loss of a plant species.
d. No other organisms would be affected.
SREE
Please select the best answer from the choices provided
o >
Answer:
Multiple organisms may be affected by the loss of a plant species.
Explanation:
Organisms that feed directly off the lost plant will be affected, and because of that, organisms that feed off those organisms will be affected. This could also affect other organisms like parasites. Other plant species may be affected from the loss of a competitive species. This could affect organisms that feed off that plant, and the organisms that feed off those organisms.
Answer:
c
Explanation:
The total charge in a compound must be 0. Explain how this is possible when the anions and cations do not have equal and opposite charges, such as in magnesium chloride and aluminum oxide. ???
The two chlorine atoms have a total charge of -2 hence the total charge in the compound is zero. Three oxygen atoms each having a charge of -2 making a total charge of -6 hence the total charge in the compound is zero.
In magnesium chloride, magnesium has a charge of +2. Chlorine has a charge of +1. However, in the compound, there are two chlorine atoms and one magnesium atom. As such, the two chlorine atoms have a total charge of -2 hence the total charge in the compound is zero.
In Aluminium oxide (Al2O3), there are two aluminium atoms having a total charge of +6. There are three oxygen atoms each having a charge of -2 making a total charge of -6 hence the total charge in the compound is zero.
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16
How do you solve this
when a metal reacts with a nonmetal, what does the metal do with its valence electrons ??
Answer:
They form ions.
Explanation:
Electrons are transferred from the metal atoms to the non-metal atoms.
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rectify the following equation 101 - 102 = 1 by moving just one digit
Make 2 in 102 as the power of 10
10^2 = 100
101 - 10^2 = 101 - 100 = 1
Hope it helped:)
Atom is anything that has mass and occupies space. True or false
Answer:
False.
Explanation:
Matter is anything that has mass and occupies space, not atoms.
why can't you find the charge of an atom in the d shell with just a periodic table?
Answer:
We can calculate the number of valence shell electrons by the group number from group number ,for 1 and 2 group,1,2 are valency or charge simply,for groups lying 3–8(boron to helium family)if number is between 3–4 the group number is the charge,if number lies between 5–8 then add -8 to it,it will give a -ve which would imply it's affinity for electron
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