Answer:
Ca + 2 HCl -- CaCl2 + H2
Explanation:
There are two hydrogen on the right side, so we multiply the left side( HCl) by 2 to get 2 hydrogen on the left. This automatically gives you 2 Cl on left side and there are already 2 cl on the right side, so now this equation is balanced.
Which materials allow electrons to flow through them?
A. Insulators only
B. Semiconductors and conductors
C. Conductors only
D. Semiconductors and insulators
The materials which allow electrons to flow through them are Semiconductors and conductors. Hence Option (B) is correct.
What are conductors ?A conductor, or electrical conductor, is a substance or material that allows electricity to flow through it.
In a conductor, electrical charge carriers, usually electrons or ions, move easily from atom to atom when voltage is applied.
Therefore, The materials which allow electrons to flow through them are Semiconductors and conductors. Hence Option (B) is correct.
Learn more about Conductor here ;
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Answer:semiconductors and conductors
Explanation:
when comparing ethanol and acetic acid, which one has the most polar bond? and what is that bond?
Answer:
Ethanol is another alcohol, and since there are less carbons in its chain, it will be more polar. So Ethanol is the most polar bond, it has two different types of bonding between its constituent atoms. The bonds between the hydrogen and carbon atoms are nonpolar covalent bonds. The hydrogen-oxygen and carbon-oxygen bonds are polar covalent bonds.
Explanation:
How many moles of hydrogen are in a 200. mg tablet of naproxen sodium, C14H13NaO3, the active ingredient in Aleve? Please show your work to receive full credit. MM = 252
Answer:
0.0103 mol
Explanation:
Step 1: Given data
Mass of the naproxen sodium tablet (m): 200. mgMolar mass of naproxen sodium (M): 252 g/molStep 2: Convert "m" to grams
We will use the conversion factor 1 g = 1000 mg.
200. mg × 1 g/1000 mg = 0.200 g
Step 3: Calculate the moles (n) of naproxen sodium
We will use the following expression.
n = m/M = 0.200 g / (252 g/mol) = 7.94 × 10⁻⁴ mol
Step 4: Calculate the moles of hydrogen in 7.94 × 10⁻⁴ moles of naproxen sodium
According to the chemical formula, the molar ratio of naproxen sodium to H is 1:13. The moles of H are 13/1 × 7.94 × 10⁻⁴ mol = 0.0103 mol.
what is the structure of methane
Answer:
CH4
Explanation:
if it is wrong, i blame my brain
1. At an environmental testing lab, a lab technician calculated the known concentration of the calibrating solution three times too high. How will this affect the results of the samples run using this calibration solution
Answer:
The deviation in the results will be too large when compared with the actual result
Explanation:
The effect this will have on the results of the samples run using this Calibration solution is that the deviation in the results will be too large when compared with the actual result that was supposed to be obtained. and this will also lead to wrong analysis by the technician .
This will cause a result that is very different from the actual result, which will lead to errors in the analysis.
We can arrive at this answer because:
A laboratory test must be done accurately and all calibrations must follow the test protocol.Changing the calibration will cause inaccurate and incorrect results, which differ from the actual result.This will promote an analysis that is unreal, false, and far from true, which will leave the entire test inaccurate.As we can see from the question above, the lab technician used a much higher calibration than what was recommended in the lab. This will lead to inaccurate and incorrect results.
More information:
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2. What is one effect of convection currents in the mantle?
A. forming deep-water currents in oceans B. cooling the rocks of the crust
C. providing energy to drive the water cycle
D. transferring heat from Earth's interior to the crust
Answer:
D no. is the answer of your question
How much does the Earth weigh?
5.972 × 10^24 kg
hope it helps
Answer:
5.972 × 10^24 kg
hope this helps
At room temperature, oxygen is a gas and hydrogen is a gas. When they combine at room temperature, they form a _______________.
Answer: they can combine to form water or hydrogen peroxide.
Explanation:
sorry if it wrong i just looked it up lol. hope this helps tho
Use the balanced equation in the image below. How many moles of
ammonia (NH3) will be produced if 2.22 moles of nitrogen (N2) are used?
(Assume there is excess hydrogen gas.) SHOW YOUR WORK TO RECEIVE
CREDIT. *
N2 + 3H2 → 2 NH3
Since there is excess hydrogen, that means that the concentration of hydrogen is not limiting.
According to the balanced chemical equation:
every mole of N2 and every 3 moles of H2 we obtain 2 moles of NH3. Since we have the amount of N2 and excess of hydrogen, we only need to work with the amount of N2.
1 mol of N2 will produce 2 moles of NH3
so now we can get a conversation tool :
moles of N2 * (2 moles of NH3/ 1 mole of N2) = moles of NH3
(2.22 mol of N2 x 2) ÷ 1 = 4.44 mol of NH3
I guess this is free:)))): ((((
Answer:
tysm!!!! :D <<<33333
Explanation:
What is the mole ratio of iron (III) chloride (FeCl3) to zinc chloride (ZnCl2) ?
2 FeCl3 + 3 Zn → 2 Fe + 3 ZnCl2
a.2:2
b.2:3
c.3:3
d.3:2
Answer:C
Explanation:
PLEASE HELP ITS RLLY IMPORTANT.
Consider the model of Ammonia to the right. Which terms would be used to describe this model? Element, molecule, and/or compound? Explain your reasoning.
What is the formula of A^4 +b^4
Answer:
A^4 +b^4
(a²)²+(b²)²
(a²+b²)²-2a²b²
or
(a²-b²)²+2a²b²
I need help please with the drop down menus
Answer:
When the archer releases the arrow, the elastic potential energy in the bowstring transforms into kinetic energy for the arrow.
Explanation:
When the string of a bow and arrow is pulled from equilibrium, the elastic potential energy in the bow is converted to kinetic energy of the arrow when the string is released.
A student plans a two-step synthesis of 1-ethyl-3-nitrobenzene from benzene. The first step is nitration of benzene to give nitrobenzene, and the second step is a Friedel-Crafts alkylation using CH3CH2Cl and AlCl3. The plan is flawed because: A : When the alkyl halide interacts with AlCl3, the resulting carbocation can rearrange before it has a chance to react with the aromatic ring. B : Nitrobenzene is too deactivated (by the nitro group) to undergo a Friedel-Crafts alkylation. C : The nitro group will direct the incoming alkyl group para position, rather than to the meta position. D : A blocking group is required to achieve this synthesis.
Answer:
Nitrobenzene is too deactivated (by the nitro group) to undergo a Friedel-Crafts alkylation.
Explanation:
The benzene ring in itself does not easily undergo electrophilic substitution reaction. Some groups activate or deactivate the benzene ring towards electrophilic substitution reactions.
-NO2 ia a highly deactivating substituent therefore, Friedel-Crafts alkylation of nitrobenzene does not take place under any conditions.
This reaction scheme is therefore flawed because Nitrobenzene is too deactivated (by the nitro group) to undergo a Friedel-Crafts alkylation.
Can someone please help me on this?
Answer:
a liquid
Explanation:
I'm not for sure but I just looked it up
Which resulted from the study of chemistry?
Answer:
I'm confused I think you're suppose to put a picture if you want someone to answer your question just saying.
Explanation:
Answer:
The understanding of the earth, air, fire, and water as the basic components of matter.
Explanation:
Which statement below best describes a volatile liquid?
Question 17 options:
1.A liquid that doesn't evaporate under atmospheric pressure
2.A liquid that evaporates slowly at low temperatures
3.A liquid that evaporates rapidly at low temperatures
4.A liquid that requires a large amount of energy to evaporate
Answer:
A liquid that evaporates rapidly at low temperatures
Explanation:
Answer:
A liquid that evaporates rapidly at low temperatures.
Explanation:
A volatile liquid such as gasoline evaporates easily. Its chemicals aren't held together as strongly, and room temperature is often enough to break intermolecular bonds and evaporate them.
PF
You have 0.531 L of gas in a container. What is the volume in mL?
Answer:
531 mL is the volume in mL
Answer:
Hi there!
I hope you are having an outstanding day.
I believe the answer to your question is 531!
Please adress me if I am incorrect. :)
Much love,
Pandora
Explanation:
How many grams of water can be made from 6 moles of oxygen
Which element, when combined with fluorine, would most likely form an
ionic compound?
A. phosphorus
B. lithium
C. carbon
D. chlorine
thermal energy is what we call energy that come from ___ of matter
The equivalence point in a titration refers to the point when
A. the mł of the acid equals the mL of the base.
B. the molarity of the acid used in the reaction equals the molarity of the base used in the reaction.
C. the number of moles of one reactant reacts completely with the moles of the other reactant.
D. the acid in the flask turns clear.
Answer:
C) the number of moles of one reactant reacts completely with the moles of the other reactant.
Explanation:
it's right put it
Answer:
C
Explanation:
______ occur between molecules that have permanent intramolecular differences in elecronegativity.
A. Dipole-dipole interactions
B. Dispersion forces
C. Hydrogen bonds
Answer:
Dipole-dipole interactions
Explanation:
Question 1 (4 points)
What is the molecular weight of Magnesium nitride, Mg3N2 (OR Mg3 N2). Report
your answer to two decimal places.
Do not include units with your answer.
The atomic weight of Mg is 24.31 grams/mole
The atomic weight of N is 14.01 grams/mole
What unit of time is based on the revolution of Earth around the sun?
A. month
B. year
C. day
D. hour
To make some oatmeal, Sally combined 40 grams of oatmeal, 10 grams of maple syrup, and some warm water. If the combined mass was 100 grams, how much water did she add?
ANSWER THIS EMEDIATLY PLEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEAAAAAAAAAASE
thank you
(ps.this is the closest subject to science (that deals with volume, mass, and matter you know that kind of stuff )that I could find
Cell Walls are found in Prokaryotes and Plant cells. True O False
Answer:
i think true
Explanation:
lemme know if right if not sorry :))
please help me
is for my daughter
Answer:
I think you have to freeze the water itself then take the temp with a thermometer ️of each one then record how long it takes each one to start freezing then how long it takes for it to melt
Explanation:
sorry if I'm wrong but you have to do the experiment yourself then fill it out
Which of these elements has the lowest ionization energy?
A. Si
B. CI
C. S
D. Na
Answer:
D . Na
Explanation: