A metalloid is a type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals.
Answer:
Metalloid, in chemistry, an imprecise term used to describe a chemical element that forms a simple substance having properties intermediate between those of a typical metal and a typical nonmetal. There is no single property which can be used to unambiguously identify an element as a metalloid.
1. A globe is what kind of model?
interactive
mathematical
conceptual
visualization
Answer:
It's visualization.
Explanation:
Hope this helps :)
Which would be another way to make the ice melt faster
Answer:
d because ur heating the ice and causing friction
Convert 65.4 m to mm.
Helppp please
Answer:65.4 meters= 65400 millimeters
Look at the potential energy diagram below. What amount of energy does the products have ?
100
80
PE
50
AB
40
C D
20
Progress of the reaction
40 KJ
60 KJ
O 20 KJ
80 KJ
Answer:
20 kJ
Explanation:
The products are C + D which is on the right side of the diagram. And it says it has 20 kJ of energy.
Balancing Equations Practice
Al(NO3)3 +
3 NH4NO3
(NH4)3PO4 → | AIPO4 +
1)
2)
AgF +
CaCl2 →
AgCl +
CaF2
3)
ZnBr2 +
Pb(NO2)2 →
Zn(NO2)2 +
PbBr2
WHAT IS A PLACE WHERE BOOKS ARE CLASSIFIED! I NEED HELP!
Answer:
From the Online Catalog to the Shelf
Libraries in the United States generally use either the Library of Congress Classification System (LC) or the Dewey Decimal Classification System to organize their books. Most academic libraries use LC, and most public libraries and K-12 school libraries use Dewey.
Explanation:
Answer:
From the Online Catalog to the Shelf
Libraries in the United States generally use either the Library of Congress Classification System (LC) or the Dewey Decimal Classification System to organize their books. Most academic libraries use LC, and most public libraries and K-12 school libraries use Dewey.
why
do real gases
divrate from the
Ideal
gas
law
Soda pop is carbonated with CO2. Mark puts one bottle of soda pop in the refrigerator and leaves the other out in the hot sunlight. After one hour, he opens both bottles. Which bottle will likely have more fizzing and bubbles? Why?
Answer:
The one left in the hot sunlight.
Explanation:
The solubility of gases decreases when temperature increases. The gas in the soda pop (CO2) left in the sun will not stay dissolved as much as the on left in the refrigerator.
Soda is a carbonated drink with soda or water and a sweetener. Soda pop in the fridge will have more fizzing and bubbles.
What is carbonated?Carbonated drinks are drinks or beverages that contain dissolved carbon dioxide. They have small bubbles and fizz of the carbon dioxide present in them.
Carbonation of the drinks is linked to the temperature as at high temperature, liquid tends to lose the carbon dioxide fizz. The carbon dioxide bubbles are retained at low temperatures as the solubility of the carbon dioxide is increased.
Therefore, the bottle kept in the refrigerator will have more bubbles and fizz.
Learn more about soda and carbonated here:
https://brainly.com/question/9908595
assume that the density of all solutions are 1.000g/ml 1. Calculate the molarity of calcium in 1.9g of calcium chloride diluted in 100 ml of Di water. 2 Calculate the concentration of both calcium and chloride lons in problem 1 in units of mg/mL, ug/L, mg/L and ug/mL. 3. Calculate the concentration of both calcium and chloride ion in problem 1 in units of ppm and ppb. You may assume that the density of the solution is 1.0 g/ml 4. You have been provided 100 ml of a 1000 ug/ml barium standard. What volume of this standard must be diluted to a final volume of 50 ml using DI water to produce a 30 ug/mL standard
Answer:
1. 0.1712M
2. 6.86mg/mL Ca, 12.14mg/mL Cl, 6860000ug/L Ca, 12140000ug/L Cl, 6860mg/L Ca, 12140mg/L Cl, 6860ug/mL Ca, 12140ug/mL Cl.
3. 6860ppm Ca and 12140ppm of Cl.
4. 1.5mL of the 1000ug/mL barium standatd must be taken.
Explanation:
1. Molarity is defined as the amount of moles of solute (Calcium chloride) present in 1L of solution.
The moles of CaCl₂ are:
1.9g CaCl₂ * (1mol / 110.98g) = 0.01712 moles
In 100mL = 0.10L:
0.01712mol / 0.10L = 0.1712M
2. The masses of Calcium and Chloride ions are:
1.9g * (40.078g Ca / 110.98g) = 0.686g Ca
And:
1.9g - 0.686g Ca = 1.214g Cl
mg/mL:
686mg Ca / 100mL = 6.86mg/mL Ca
1214mg Cl / 100mL = 12.14mg/mL Cl
ug/L:
686000ug / 0.1L = 6860000ug/L Ca
1214000ug/ 0.1L = 12140000ug/L Cl
mg/L:
686mg Ca / 0.1L = 6860mg/L Ca
1214mg Cl / 0.1L = 12140mg/L Cl
ug/mL:
686000ug Ca / 100mL = 6860ug/mL Ca
1214000ug Cl / 100mL = 12140ug/mL Cl
3. ppm are defined as mg/L, the ppm of Ca are 6860ppm Ca and 12140ppm of Cl
4. The solution must be diluted from 1000ug/mL to 30ug/mL, that is a dilution of:
1000ug/mL / 30ug/mL:
33.33 times must be diluted the solution.
As final volume of the diluted solution must be 50mL, the volume of the standard needed is:
50mL / 33.33 times = 1.5mL of the 1000ug/mL barium standatd must be taken
How many moles of a gas would be held by a 6 L container of nitrogen gas at 2 atm and 300 Kelvin?
Answer:
I think you would have to multiply 6 times 2, which it equals 12. And then just divide it by 300, and that's your answer. Hope I was able to help!
Explanation: Have a good day!
A sample of a mixture of salt and sugar has a total mass of 0.8920 g. If the sample contains 0.0982 g of salt, what percent of the sample is sugar?
Answer:
89%
Explanation:
The computation of the sample percentage is sugar is shown below:
As we know that
The mass of the total sample mixture is
= Mass of salt + mass of sugar
= 0.8920
And, the mass of salt is 0.0982 g
So, the mass of sugar is
= 0.8920 - 0.0982
= 0.7938 g
Now the percentage of the sample is sugar is
= 0.7938 ÷ 0.8920
= 89%
Determine the energy change in the following reaction. This reaction is considered ...
C6H12 + O2
CO2 + H2O + heat
energy absorbed is equal to the energy released
endothermic
O isothermic
O exothermic
Answer:isothermic
Explanation:
Answer:
Energy abosorbed = Energy released.
Thus ISOTHERMIC
as earth cooled and formed a planet, LESS dense elements and compounds separated and formed layers around a DENSE core. Is this true or false?
Answer:
True
Explanation:
The core of the earth is very dense so that leads me to beleive that the answer is true.
When something heats up, new energy is created, and when something cools down, energy is destroyed. Please help! this is science not chemistry.
Answer:
False
Explanation:
This isn't true. Energy is neither created nor destroyed. Heating something makes the particles move faster, but no new energy is created. Cooling results in slower particles, but once again, no energy loss.
The given statement "when something heats up, new energy is created, and when something cools down, energy is destroyed" is absolutely false.
Why energy is not destroyed in a closed system?According to the first law of thermodynamics which states that the energy of a closed system must always remain constant. It can neither be created nor destroyed without any interference from outside. This is the principle of physics.
The same concept is described by chemistry through the name known as The law of conservation of energy. This states that in a chemical reaction energy can never be created or destroyed.
When you heat up something, the movement of particle increase, not energy. Similarly, when you cool down something, the movement of particles or atoms within that decreases, not energy.
Therefore, the given statement "when something heats up, new energy is created, and when something cools down, energy is destroyed" is absolutely false.
To learn more about the Law of conservation of energy, refer to the link:
https://brainly.com/question/166559
#SPJ2
Please help
Write a balanced equation for each chemical reactions. Include appropriate symbols. First reactant formula is given.
Hydrochloric acid (HCl) reacts with Zinc to form hydrogen gas and zinc chloride.
2 HCl +
Acetylene gas (C2H2) burns in a welding torch with oxygen to form carbon dioxide gas and water vapor. 2 C2H2 (g) +
c. Silver nitrate plus calcium chloride (CaCll2) yields silver chloride and calcium nitrate. 2 AgNO3 +
d. Oxygen gas combines with hydrogen gas to produce liquid water. O2 +
e. Hydrogen peroxide decomposes into oxygen gas and water when it contacts blood. 2 H2O2
a. [tex]\mathrm{2HCl_{(aq)} + Zn_{(s)}} \rightarrow \mathrm{H_{2(g)} + ZnCl_{2(aq)}}[/tex]
b. [tex]\mathrm{2C_2H_{2(g)} + 5O_{2(g)}} \rightarrow \mathrm{4CO_{2(g)} + 2H_2O_{(g)}}[/tex]
c. [tex]\mathrm{2AgNO3_{(aq)} + CaCl_{2(aq)}} \rightarrow \mathrm{2AgCl_{(s)} + Ca(NO_3)_{2(aq)}}[/tex]
d. [tex]\mathrm{O_{2(g)}+2H_{2(g)}} \rightarrow \mathrm{2H_2O_{(\ell)}}[/tex]
e. [tex]\mathrm{2H_2O_{2(aq)}} \rightarrow \mathrm{O_{2(g)} + 2H_2O_{(\ell)}}[/tex]
After mixing the solutions in a separatory funnel, the stopper should be ________and the liquid should be ________and the layers allowed to separate. When you get close to the interface between the layers, ________the funnel and________until the first layer______ is collected. _______to collect the second layer.
Answer:
The answer is below
Explanation:
The separation technique is used for separating immiscible liquids.
When separating, the stopper has to be removed when draining the lower layer so as to prevent a vacuum. If vacuum is allowed, the draining rate will reduce and stop.
The liquid should be mixed by shaking the funnel and then opening the stopcock so as the vent out gases.
When near interface between the layers, you should set your eye level so that you do not drain up to the second layer.
After completely draining the first layer, the second layer should be collected in a new flask.
After mixing the solutions in a separatory funnel, the stopper should be removed and the liquid should be mixed thoroughly and the layers allowed to separate. When you get close to the interface between the layers, get eye level with the funnel and slow the draining until the first layer is collected. Switch to a new flask to collect the second layer.
After mixing the solutions in a separatory funnel, the stopper should be removed and the liquid should be mixed thoroughly and the layers allowed to separate. When you get close to the interface between the layers, get eye level with the funnel and slow the draining until the first layer is collected. Switch to a new flask to collect the second layer.
Separatory funnel:It is used in liquid-liquid extractions to separate (partition) the components of a mixture into two immiscible solvent phases of different densities.The lab apparatus majorly used for the separation of the two immiscible solutes in the given mixture. For example, oil and alcohol. It is applicable to separate the solvent which are immiscible and which cannot be separated by steam distillation. This method is useful for liquids only.Learn more:
brainly.com/question/24108403
Hotter things have more energy than colder things. this is science middle school
Answer:
true
Explanation:
Hotter things have more heat energy than colder things. That's because the atoms or molecules move around faster in hot things (red, right) than they do in cold things (blue, left). ... The more heat you supply, the faster the molecules move and the further apart they get.
Answer: Depends on the situation.
Explanation: Hotter things do have more energy than colder things. But, if the mass of the colder thing is bigger, it really depends. If the colder thing have way more particles than the hotter thing, the colder thing may have more energy.
What are the missing coefficients for the skeleton equation below? Cr(s) + Fe(NO3)2(aq) → Fe(s) + Cr(NO3)3(aq)
Answer:
2 3 3 2
Explanation:
You have a 5M stock solution of NaCl (Formula Weight: 58.44g/mole), a 0.25M stock solution of glucose (Formula Weight; 180.156g/mole), and a bottle of solid Tris base (Formula Weight: 121.1g/mole). How would prepare (be specific) 250mL of a single solution containing 150mM Tris, 25mM glucose, and 150mM NaCl. g
Answer:
4.54g of Tris base,25mL of the 0.25M stock solution of glucose and 7.5mL of the 5M stock solution of NaCl must be added and complete the volume in a volumetric flask to 250.0mL
Explanation:
To prepare the single solution we need to find the moles of each solute (Tris, glucose and NaCl) from the stock solutions anf the solid:
Moles Tris:
0.250L *(0.150mol / L) = 0.0375moles Tris * (121.1g/mol) = 4.54g of Tris base must be added
Moles glucose:
0.250L * (0.025mol/L) = 6.25x10⁻³mol glucose * (1L / 0.25mol) = 0.025L = 25mL of the 0.25M stock solution of glucose must be added
Moles NaCl:
0.250L * (0.150mol / L) = 0.0375mol NaCl * (1L / 5mol) = 0.0075L =
7.5mL of the 5M stock solution of NaCl
You must add:
4.54g of Tris base,25mL of the 0.25M stock solution of glucose and 7.5mL of the 5M stock solution of NaCl must be added and complete the volume in a volumetric flask to 250.0mL
Name each of the following species for the following acid-base reactions. (The equilibrium lies to the right in each case, i.e., the product side is favored. If the species is an ion, include the word "ion" in the name. Use systematic names such as "methanol" instead of archaic names like "methyl alcohol" or "wood alcohol".)
(a) H3O+ (hydronium ion) + CH3O- (methoxide ion) <--> *reverse reaction arrow*
acid:?
base:?
conjugate acid:?
conjugate base:?
(b) CH3CH2O- (ethoxide ion) + HCl (hydrogen chloride) <--> *reverse reaction arrow*
acid:?
base:?
conjugate acid:?
conjugate base:?
(c) NH2- (amide ion) + CH3OH (methanol) <--> *reverse reaction arrow*
acid:?
base:?
conjugate acid:?
conjugate base:?
Answer: a) [tex]H_3O^++CH_3O^-\rightleftharpoons CH_3OH+H_2O[/tex]
acid : hydronium ion
base : methoxide ion
conjugate acid : methanol
conjugate base: water
b) [tex]CH_3CH_2O^-+HCl\rightleftharpoons CH_3CH_2OH+Cl^-[/tex]
acid : hydrogen chloride
base : ethoxide ion
conjugate acid : ethanol
conjugate base: chloride ion
c) [tex]NH_2^-+CH_3OH\rightleftharpoons NH_3+CH_3O^-[/tex]
acid : methanol
base : amide ion
conjugate acid : ammonia
conjugate base: methoxide ion
Explanation:
According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.
The species accepting a proton is considered as a base and after accepting a proton, it forms a conjugate acid.
The species losing a proton is considered as an acid and after loosing a proton, it forms a conjugate base
For the given chemical equation:
a) [tex]H_3O^++CH_3O^-\rightleftharpoons CH_3OH+H_2O[/tex]
acid : hydronium ion
base : methoxide ion
conjugate acid : methanol
conjugate base: water
b) [tex]CH_3CH_2O^-+HCl\rightleftharpoons CH_3CH_2OH+Cl^-[/tex]
acid : hydrogen chloride
base : ethoxide ion
conjugate acid : ethanol
conjugate base: chloride ion
c) [tex]NH_2^-+CH_3OH\rightleftharpoons NH_3+CH_3O^-[/tex]
acid : methanol
base : amide ion
conjugate acid : ammonia
conjugate base: methoxide ion
.
wright it in 500 words Submit your persuasive essay about nuclear power. Remember to proofread your work before submitting.
Answer:
Explanation:
Introduction Paragraph. Hook. Background Points. Thesis Statement.( done)
Body Paragraph. Topic Sentence. Supporting fact 1. Supporting fact 2. Transition Sentence.(done)
Conclusion Paragraph. Re-statement of Thesis. Summary of Main Point. Challenge to the Reader.( done)
What is the biggest difference between thermal energy and temperature?
Answer:
Heat deals more with thermal energy whereas temperature deals with molecular kinetic energy.
Students investigate forces and how they affect objects. They use a small car and wooden blocks to carry out their investigation
They pushed the cart and blocks 10 times, using the same amount of force. Each time, they added 5 more blocks to the wagon
They measured how far the cart moves each time. They made a line graph to show their results. What will their graph show?
The distance the cart moves decreases as the number of blocks in it increases
As the number of blocks in the cart increases, the distance it moves stays the same.
The distance the cart moves is not related to the number of blocks in it
The distance the cart moves increases as the number of blocks in the cart increases
Answer:
increase the number of blocks
increase the number of students pulling the cart
increase the number of blocks and increase the number of students pulling the cart
decrease the number of blocks
decrease the number of students pulling the cart
decrease the number of blocks and decrease the number of students pulling the cart
(ANSWER CHOICES)
Explanation:
The octane rating of gasoline is a relationship of the burning efficiency of the given gasoline mixture to the burning efficiency of octane (C8H18). Like most hydrocarbons, octane reacts with oxygen gas to produce carbon dioxide and water. The unbalanced equation for this reaction is
Answer:
C₈H₁₈(l) + O₂(g) ⇒ CO₂(g) + H₂O(l)
Explanation:
Let's consider the unbalanced equation for the combustion reaction of octane.
C₈H₁₈(l) + O₂(g) ⇒ CO₂(g) + H₂O(l)
We can begin balancing H atoms by multiplying H₂O by 9, and C atoms by multiplying CO₂ by 8.
C₈H₁₈(l) + O₂(g) ⇒ 8 CO₂(g) + 9 H₂O(l)
Finally, we get the balanced equation by multiplying O₂ by 12.5.
C₈H₁₈(l) + 12.5 O₂(g) ⇒ 8 CO₂(g) + 9 H₂O(l)
Answer:
The coefficents will be 2, 25 --> 16, 18
Explanation:
What is the mass of an object if its potential energy is 800 J and it is 2.0 m above the ground?
Answer:
potential energy = mgh put values and get your answer
Given that a 0.130 M HCl(aq) solution costs $39.95 for 500 mL, and that KCl costs $10/ton, which analysis procedure is more cost-effective
Answer:
KCl is cost effective
Explanation:
In order to know this, we need to see how much it cost 1 g of each reactant. Let's begin with HCl
HCl:
In this case, let's calculate the moles of HCl in a 0.130 M solution and then, the mass of HCl using the molecular weight of 36.5 g/mol, to get the cost the HCl at the end using the given price:
nHCl = 0.130 moles/L * 0.5 L = 0.065 moles
mHCl = 0.065 moles * 36.5 g/mol = 2.3725 g
Cost HCl = 39.95 $ / 2.3725 g = 16.84 $/g
Conclusion, 1 g of HCl costs 16.84 $
KCl:
In this case, it's pretty obvious that 1 ton of KCl cost 10$, so, there is no need to do further calculations because 1 ton (or more than 1000 kg of the salt) it's just 10$. This is less expensive than the 16.84$ for just 1 g of HCl, so, final conclusion, KCl is more cost-effective.
Hope this helps
help! help! plz............
1)What is most important of periodicity lest 4
2)why are energies of
various energy levels in hydrogen atomic are negative?
This is for science! I really need help.
Answer
Solid
liquid
Gas
Explanation:
The dependent variable in an experiment
A.never changes
B.will vary according to the temperature
C.shows changes during the experiment.
D.is always the larger value.
Answer:
C
Explanation:
HELP! URGENT Which of the following best states the relationship between erosion and deposition?
A.
When the energy transporting sediments diminishes, the sediments settle in a low-lying area; therefore, deposition always follows erosion.
B.
When the energy transporting sediments diminishes, the sediments settle in a low-lying area; therefore, erosion always follows deposition.
C.
When rock is broken down into sediments, the sediments are eventually transported to another location; therefore, deposition is a form of erosion.
D.
When rock is broken down into sediments, the sediments are eventually transported to another location; therefore, erosion is a form of deposition.