Rubidium-82 has:
Number of Electrons = 82
Number of Protons = 37
Number of Neutrons = 45
Regarding nomenclature, what is the name of the formula NaNO?
The nomenclature name of NaNO is Sodium Nitrite or could also be said as Sodium Nitrate.
Sodium nitrite or sodium nitrate is a chemical compound with Sodium cation and nitrate anion. So the combination of these two ions gives us Sodium nitrite.
It is a white, ionic, solid crystalline compound that is used as a food preservative and additive.
Sodium nitrite and sodium nitrate are both inorganic compounds with the chemical formula NaNO₃.
They are both white, crystalline solids that are highly soluble in water. Sodium nitrite is the active ingredient in many curing agents used to preserve meats, and it is also used as a color fixative in smoked fish. Sodium nitrate is used as a fertilizer and as an oxidizing agent in pyrotechnics.
Therefore the nomenclature name of the chemical compound is Sodium Nitrite or Sodium nitrate depending upon the anion NO₂ or NO₃
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1. A chemical reaction where reactants exchange places in the product. *
(10 Points)
Synthesis
Decomposition
Replacement
Answer:
Replacement is your answer
When a gas particle changes phase into a liquid particle:
A. the particle loses energy
B. the particle gains energy
C. the particle has no change in energy
D. the change in energy depends on the type of gas
Answer:B
Explanation:
The movement in particles is faster than the particle movement in a solid and the attractive forces are much weaker.A gas is something with no definite volume and no definite shape. Gas particles are far apart and move rapidly and freely. The attractive forces between gas particles are very weak or absent.When a liquid is heated, the particles are given more energy. They start to move faster and further apart. At a certain temperature, the particles break free of one another and the liquid turns to gas. This is the boiling point.Particles in gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. Solid are tightly packed, usually in a regular pattern.Has 121 nuetrons and 80 electrons plz help i will pick you as brainliest
Answer:
Mercury Atom
Explanation:
If you are talking about what has 121 neutrons and 80 electrons, then it would be a Mercury Atom. Hope this helps!
Determine the empirical formula of the compound formed when 1.2g of magnesium reacts with 3.55g of chlorine.Take the molar mass of magnesium and chlorine to be 24g and 35.5g respectively.
Explanation:
For Mg, (1.2 g Mg/24 g Mg) = 0.05 mol Mg.
For Cl, (3.55 g Cl/35.5 g Cl) = 0.1 mol Cl
So the ratio now is
Mg:Cl = 0.05 : 0.1 = 1:2
I got the 1:2 ratio by dividing both by the smallest number, which is 0.05 mol. Therefore, the empirical for formula of the substance is \(MgCl_2\)
The empirical formula of the compound formed when magnesium reacts with chlorine is MgCl₂.
To determine the empirical formula of the compound formed when magnesium (Mg) reacts with chlorine (Cl), we need to find the ratio of the elements in terms of moles.
First, we calculate the number of moles of each element:
Moles of Mg = Mass of Mg / Molar mass of Mg
Moles of Mg = 1.2 g / 24 g/mol
Moles of Mg = 0.05 mol
Moles of Cl = Mass of Cl / Molar mass of Cl
Moles of Cl = 3.55 g / 35.5 g/mol
Moles of Cl = 0.1 mol
Next, we determine the simplest whole-number ratio between the moles of Mg and Cl:
Mg:Cl = 0.05 mol : 0.1 mol
To simplify the ratio, we divide both values by the smaller value (0.05 mol in this case):
Mg:Cl = 0.05 mol / 0.05 mol : 0.1 mol / 0.05 mol
Mg:Cl = 1 : 2
Therefore, the empirical formula of the compound formed when magnesium reacts with chlorine is MgCl₂.
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Wine goes bad soon after opening because the ethanol (CH3CH2OH) dissolved in it reacts with oxygen (O2) gas to form water and aqueous acetic acid (CH3COOH), the main ingredient in vinegar. Calculate the moles of oxygen needed to produce 0.080 mol of water. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits.
The number of mole of oxygen needed is of 0.080 mole.
To solve this question, we'll begin by writing the balanced equation for the reaction. This is illustrated below:
CH₃COOH + 2O₂ —> CO₂ + 2H₂OFrom the balanced equation above,
2 moles of O₂ reacted to produce 2 moles of H₂O.
Finally, we shall determine the number of mole of O₂ needed to produce 0.080 mole of H₂O. This can be obtained as follow:
From the balanced equation above,
2 moles of O₂ reacted to produce 2 moles of H₂O.
Therefore,
0.080 mole of O₂ will also react to produce 0.080 mole of H₂O.
Thus, 0.080 mole of oxygen, O₂, is needed for the reaction.
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Calculate the atomic mass of X. The three X isotopes have atomic mass and relative abundances of 27.9769 amu (92.2297%), 28.9765 amu (4.6832%) and 29.9738 amu (3.0872%). What is this atom?
Co
Al
Ni
Si
This is the element Silicon.
=========================================================
Explanation:
First convert each percentage to its decimal form.
For example, 92.2297% converts to 0.922297 after moving the decimal point two spots to the left.
After doing that, multiply those decimal values with their respective atomic mass unit (amu) values.
27.9769 * 0.922297 = 25.803010939328.9765 * 0.046832 = 1.35702744829.9738 * 0.030872 = 0.9253511536Then we add up the results
25.8030109393 + 1.357027448 + 0.9253511536 = 28.0853895409
That rounds to about 28.085
Then look at the periodic table to see the atomic mass of Cobalt (Co), Aluminum (Al), Nickel (Ni) and Silicon (Si). The mass values listed in the periodic table are weighted averages of all the isotopes. The units for the mass are still in amu.
Cobalt = 58.933Aluminum = 26.982Nickel = 58.693Silicon = 28.085We have a match with silicon, showing that choice D is the final answer.
What state of matter is every compound in for the chemical reaction? CH4 (g)+2 0₂ (g) -> CO₂(g) + 2 H₂0 (g
Answer:
CH4 (g) and O2 (g) are both in the gaseous state, while CO2 (g) and H2O (g) are also in the gaseous state.
In the above reaction, the reactants are in the gaseous state, and the products formed are also in the gaseous state.
Every compound in a chemical reaction can be in any state of matter like solid, liquid, or gas. In the reaction of methane and oxygen, the initial state of the reactants is in the gaseous form. The chemical reaction of methane and oxygen is given by the equation CH4 (g) + 2 O2 (g) -> CO2 (g) + 2 H2O (g).Here, methane and oxygen are the reactants, and carbon dioxide and water are the products. Methane (CH4) and oxygen (O2) react together in the presence of a spark or heat to produce carbon dioxide (CO2) and water (H2O).In the reaction, the methane gas combines with oxygen gas, which causes the release of heat energy and forms carbon dioxide gas and water vapor. Methane gas is a colorless and odorless gas that burns cleanly and is one of the primary components of natural gas.
The oxygen gas required for the reaction is available in the atmosphere. Carbon dioxide is a colorless gas with a faint odor and taste and is a significant component of the Earth's atmosphere. Water is a colorless, odorless, and tasteless liquid that is essential to life.The state of matter of every compound in a chemical reaction can change depending on the conditions in which the reaction occurs. For instance, a substance that is in the solid state at a lower temperature may melt into a liquid or boil into a gas at a higher temperature. Similarly, a liquid may freeze into a solid or vaporize into a gas under different conditions.
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In an anatomy class, a student has been learning about the bones of the body. While taking a test, he needs to identify the sternum, which is a thin, flat bone with bumpy edges.
Which bone is the sternum?
Answer:
The term “flat bone” is somewhat of a misnomer because, although a flat bone is typically thin, it is also often curved. Examples include the cranial (skull) bones, the scapulae (shoulder blades), the sternum (breastbone), and the ribs. Flat bones serve as points of attachment for muscles and often protect internal organs.
HOPE THIS HELPS!!! :D
Answer:
its b
Explanation:
Applying a force can make an electron shift from one atom to another causing what?
How many molecules are in 6.95 mol of Bal2?
Answer:
4.14 x 10^24 molecules
Explanation:
There are 6.95 x 6.022 x 10^23 or 4.14 x 10^24 molecules of Bal2 in 6.95 mol. This can be determined by using the Avogadro's number to calculate the number of molecules in a given amount of moles. Avogadro's number is equal to 6.022 x 10^23, which means that for every mole of a substance, there are 6.022 x 10^23 molecules of that substance. Therefore, 6.95 moles of Bal2 would contain 6.95 x 6.022 x 10^23 molecules, or 4.14 x 10^24 molecules.
12. What is the chemical name for the compound
CH3CH₂CH₂CH3?
(1) butane
(3) decane
(2) butene
(4) decene
The chemical name for the compound CH3CH₂CH₂CH3 is butane.
What is alkane?Alkanes are any acyclic saturated hydrocarbon with a carbon to carbon single bond e.g. methane, ethane etc.
Alkanes have a general molecular formula of CnH2n+2. The number of carbon atoms determines the name of the alkane member.
According to this question, a chemical compound with the molecular formula; CH3CH₂CH₂CH3 is given. This compound posseses 4 carbon atoms and 10 hydrogen atoms, hence, is butane.
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How many kilojoules of heat are needed to raise the temperature of 10g of aluminum from 22 degrees C to 55 degrees C, if the specific heat of aluminum is .901 j/gc?
Answer:
name four agricultural inputs are subsidized by the government
0.297 kJ of heat is needed to raise the temperature of 10g of aluminum from 22 degrees Celsius to 55 degrees Celsius.
The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.
It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.
It is given by the formula -
Q = mcΔT
where, Q = amount of heat
m = mass
c = specific heat
ΔT = Change in temperature
Given,
mass = 10g
c = 0.901J/g⁰C
Initial temperature (T₁) = 22⁰C
Final Temperature (T₂) = 55⁰C
Q = mcΔT
= 10 × 0.901 × (55 -22)
= 297.33 J = 0.297 kJ
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A compound is found to contain 30.45 % nitrogen and 69.55 % oxygen by weight. To answer the questions, enter the elements in the order presented above. 1. What is the empirical formula for this compound? 2. The molecular weight for this compound is 46.01 g/mol. What is the molecular formula for this compound?
Answer:
Empirical formulae is NO2
Molecular Formulae is NO2
Give the mathematical relationship for an unsaturated solution in comparing Q with K sp:__________.
a. Q> > Кsp
b. Q = ksp
c. Q #Ksp
d. Кsp 0
e. none of the above
Answer:
Q < Ksp
Explanation:
The general equilibrium of a constant product solubility, ksp, is:
AB ⇄ A⁺ + B⁻
Where Ksp is defined as:
Ksp = [A⁺] [B⁻]
When [A⁺] [B⁻] = Ksp, the solution is saturated or oversaturated because there are the maximum amount of ions that solution can dissolve.
When the solution is oversaturated, AB is produced.
Now, in a unsaturated solution, the [A⁺] [B⁻] is less than the maximum amount that can be dissolved. That means:
[A⁺] [B⁻] = Q < Ksp
Q is defined in the same way than Ksp, just in Q the system is not in equilibrium.
Right answer is:
Q < KspThe mathematical relationship for an unsaturated solution in comparing Q with K sp is Q < Ksp.
Calculation of the mathematical relationship:Since
The general equilibrium of a constant product solubility, ksp, should be
AB ⇄ A⁺ + B⁻
Here. Ksp is defined as:
Ksp = [A⁺] [B⁻]
At the time When [A⁺] [B⁻] = Ksp, the solution should be saturated or oversaturated since there are the maximum amount of ions that solution can dissolve.
When the solution is oversaturated, AB is produced.
Now, in a unsaturated solution, the [A⁺] [B⁻] is lower than the maximum amount that can be dissolved. That means [A⁺] [B⁻] = Q < Ksp
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What is the pressure of 1.27 L of a gas at 288°C, if the gas had a volume of 875 ml at
145 kPa and 176°C?
The pressure of 1.27 L of a gas at 288°C, if the gas had a volume of 875 ml at 145 kPa and 176°C is 1.195 atm.
What is ideal gas equation?Ideal gas equation of any gas will be represented as:
PV = nRT, where
P = pressure
V = volume
n = moles
R = universal gas constant
T = temperature
First we calculate the moles of gas, when the volume of gas 875 ml at
145 kPa and 176°C as:
n = (1.431atm)(0.875L) / (0.082L.atm/K.mol)(449.15K)
n = 1.252 / 36.83 = 0.033 moles
Now we measure the pressure of 0.033 moles of gas of 1.27 L of a gas at 288°C as:
P = (0.033mol)(0.082L.atm/K.mol)(561K) / (1.27L) = 1.195 atm
Hence required pressure of gas is 1.195 atm.
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Calculate these mass of 0.520 moles
Answer:
5 is the perfect Ans for this
10. What does a full moon look like from earth? *
Your answer
Answer:
like a circle
Answer:
it would look white and its a circle
Explanation:
pLEASE MARK BRAINLIEST
A new linear temperature scale, degrees Zunzol ( ∘Z ), is based on the freezing point and boiling point of a newly discovered compound zunzol. The freezing point of zunzol, −117.3 ∘C, is defined as 0 ∘Z, and the boiling point of zunzol, 78.4 ∘C, is defined as 100 ∘Z. What is the freezing point of water in degrees Zunzol?
The boiling point of water in Zunzol is 59.9∘Z.
What are fixed points?A thermometer must have two fixed points, the upper fixed points and the lower fixed point. The upper fixed point corresponds to the boiling point while the lower fixed point corresponds to the melting point.
Having that;
x - 0/100 = 0 - (-117.3)/78.4 - (-117.3)
x/100 = 117.3/195.7
195.7x = 117.3 * 100
x = 117.3 * 100/195.7
x = 59.9∘Z
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Balance c5h12+02+co2+h20
Answer: you can't really balance it doesn't make anything
Explanation:
You purchase a rare species of plant that acquires oxygen through the solution it is placed in. Knowing that the plant will be kept outside over the scorching summer, what type of solution should the plant be placed in to assure that it receives the greatest amount of oxygen possible?
Plants produce their nourishment through a process called photosynthesis. They generate energy in the shape of glucose using water, carbon dioxide, and sunshine.
What does a high glucose level mean?Because the body doesn't produce enough insulin, hyperglycemia (increased blood glucose) occurs when there is excessive sugar in the blood. Hyperglycemia, a sign of diabetes, can lead to vomiting, intense hunger and thirst, a rapid heartbeat, eyesight issues, and other complaints.
Does glucose lead to weight gain?High blood glucose concentrations can be caused by eating more carbs than what the body can utilize. The reason for this is that the body converts carbohydrate into simple sugars. Ineffective cell removal of carbohydrates from the blood results in the body storing it as fat in the tissues. Weight gain may result from this.
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what is the volume of 18.9 g of a liquid that has a density of 0.956 g/ml
Circle the letter of cach sentence that is true about silica.
a. It is formed from oxygen and nitrogen. b. It makes magma thicker, .
C. It is rarcly found in the crust,
d. It produces light-colored lava.
Answer:
The correct answer choices are B and D.
Explanation:
A volcanic eruption happens when magma reaches the surface of the earth. Depending on the amount of gas and the silica content of the magma, the lava and the type of eruption can vary. Silica, which forms from the elements silicon and oxygen, makes the lava thicker and less runny. When lava is thick, the volcanic eruption tends to be more explosive. The amount of silica also changes the color and density of the lava, which then makes different kinds of igneous rocks. As the gas content of the lava goes up, the eruption becomes more explosive.
if you add 25 grams of NaCO3 to 100 ml of .500 m HCl, which reactant will be limiting.
Taking into account the reaction stoichiometry, the reactant HCl is the limiting reagent.
Reaction stoichiometryIn first place, the balanced reaction is:
Na₂CO₃ + 2 HCl → 2 NaCl + CO₂ + H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Na₂CO₃: 1 moleHCl: 2 molesNaCl: 2 molesCO₂: 1 moleH₂O: 1 moleThe molar mass of the compounds is:
Na₂CO₃: 106 g/moleHCl: 36.45 g/moleNaCl: 58.45 g/moleCO₂: 44 g/moleH₂O: 18 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Na₂CO₃: 1 mole ×106 g/mole= 106 gramsHCl: 2 moles ×36.45 g/mole= 72.9 gramsNaCl: 2 moles ×58.45 g/mole= 116.9 gramsCO₂: 1 mole ×44 g/mole= 44 gramsH₂O: 1 mole ×18 g/mole= 18 gramsDefinition of molarityMolar concentration is a measure of the concentration of a solute in a solution, be it some molecular, ionic, or atomic species.
Molarity indicates the number of moles of solute that are dissolved in a given volume and it is calculated by:
molarity= number of moles÷ volume
Limiting reagentThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction.
Limiting reagent in this caseIn first place, you know:
Molarity of HCl= 0.500 MNumber of moles of HCl= ?Volume of HCl= 100 mL= 0.100 L (being 1000 mL= 1 L)Replacing in the definition of molarity:
0.500 M= number of moles÷ 0.100 L
Solving:
number of moles= 0.500 M× 0.100 L
number of moles= 0.05 moles
This indicates that 0.05 moles of HCl reacts.
To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 106 grams of Na₂CO₃ reacts with 2 moles of HCl, 25 grams of Na₂CO₃ reacts with how many moles of HCl?
moles of HCl= (25 grams of Na₂CO₃× 2 moles of HCl)÷ 106 grams of Na₂CO₃
moles of HCl= 0.4717 moles
But 0.4717 moles of HCl are not available, 0.05 moles are available. Since you have less moles than you need to react with 25 grams of Na₂CO₃, HCl will be the limiting reagent.
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How many atoms of hydrogen in the product side of the balanced equation?
Fe + H2O ---> FeO + H2
A) 2
B) 3
C)6
Answer:
i think the answer should be a
The world's record for the largest cup of coffee was broken on
October 15. 2010. with a 2010-gal cup of coffee in Las Vegas, Ive
vada. If a cup of coffee contains 473 mL of coffee, how many
cups of coffee would be reauired to till this coffee cup
The number of cups of coffee in a 2010-gal cup of coffee is 16086 cups of coffee
What is the number of cups of coffee in a 2010-gal cup of coffee?The number of cups of coffee in a 2010-gal cup of coffee is calculated as follows:
Number of cups of coffee = volume of 2010-gal in ml/473 ml
Volume of large cup of coffee = 2010-gal
Number of mL in 1 gal = 3785.41 mL
2010 gal in mL = 2010 * 3785.41
2010 gal in mL = 7608674.1 mL
Number of cups of coffee = 7608674.1 mL/473 mL
Number of cups of coffee = 16086 cups of coffee
In conclusion, the number of cups pf coffee in 2010 gal is obtained using the conversion factor between gal and mL
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If you want to distinguish between alkanes and alkenes using chemical reactions, which test: the combustion or the bromine is the better one? Explain your answer. Question 2: what you can use to wash the cloth contaminated by oil?
1) We could use the bromine water test to tell the difference between the alkane and the alkene
2) We can use a detergent to wash a cloth that is contaminated by oil.
What is an alkane?The term alkane has to do with a hydrocarbon that is composed of only a straight chain compound there are no multiple bonds in the alkane molecule and this is the difference between the alkane and the alkene. The alkene is composed of double bonds. The alkene compounds are able to decolorize bromine water while the alkanes can not.
If you have a contaminated cloth, you can be able to wash it by the use of a detergent because it is able to lift off the grease or oil by the use of the hydrophobic tail of the detergent.
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Which of these does not accurated descibe the wright brothers first airplane
Answer:
it had wings that flapped similat to birds wings
Using the reading "Fossil Fuels" from lesson 12 describe the environmental and economic benefits and drawbacks of fossil fuels. Second, looking over the benefits and drawbacks, in your opinion, what do you think will happen to mining of fossil fuels in the next 50 years?
Fossil fuels are essential part of the power generation in the world. They are easily combustible and more reliable and cheaper. However, the burning of fossil fuels releases toxic gases to the environment.
What are fossil fuels ?Fossil fuels are fuel generated from the decomposition materials. Petroleum, coal, natural gas etc. are fossil fuels which are excavating from the earth.
Fossil fuels are non-renewable sources of energy. Hence, as the existing fossil sources are exhausted no more fossil fuel can be made. It is cheaper, reliable and easy to use.
However, the toxic hydrocarbon gases released from the burning of fossil fuels make the environment polluted. Therefore, overuse of fossil fuel definitely rise the atmospheric pollution.
Its use over the next 50 years, will increase the global warming and more of it will be exhausted.
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from where the baby plant gets nutrition while its under ground?
Explanation:
The "baby" plant grows entirely from stored energy and food from the cotyledons until it reaches sunlight