Answer:
When an acid reacts with a metal, what is one of the usual products?
C) Hydrogen gas
Explanation:
How many electrons are in an atom of nitrogen (N)?
The Periodic Table
A. 2
B. 7
C. 14
D. 5
Answer:
There are 7 electrons in the nitrogen atom two in k shell and 5 in l shell
Explanation:
PLEASE MARK ME BRAINLIEST IF MY ANSWER IS CORRECT PLEASE
10 POINTS!
What stops beta particles?
skin
aluminum foil
paper
air
Answer:
The answer is aluminum foil.
Answer:
aluminum foil Mark me brainliest, please.activity acid bases solutions project need help !!!!
1. Acids have highest concentration of hydronium ions.
2. Bases have highest concentration of Hydroxide ions
3. a. less than 7 b. more than 7
4. Acids (Presence of hydronium ions)
You need Conclusions too?
What is the molarity of 4 g of NaCl in 3,800 mL of solution?
Answer:
.018 M
Explanation:
Mole weight of NaCl (from periodic chart) = 58.44 g /mole
4 g / 58.44 gm/mole = .06845 mole
.06845 mole / (3.8 liter ) = .018 M
What is the solubility of MgCO₃ in a solution that contains 0.080 M Mg²⁺ ions? (Ksp of MgCO₃ is 3.5 × 10⁻⁸)
Answer: 4.4 x 10^-7
Explanation:
The dissociation equation for this reaction is:
MgCO3 (s) → Mg+2 (aq) + CO3-2 (aq)
[tex]\text { So, } k_{s p}=(x+0.08) x[/tex] (Here 0.08 >>> x )
[tex]\begin{aligned}\Rightarrow 3.5 \times 10^{-8} &=0.08 \times x \\\Rightarrow x &=\frac{3.5}{0.08} \times 10^{-8} \\&=4.37 \times 10^{-7} \\\Rightarrow x & \approx 4.4 \times 10^{-7} \mathrm{~M}\end{aligned}[/tex]
So the solubility MgCO₃ in a solution that containing 0.080 M Mg²⁺ is 4.4 x 10^-7
Step 1: Pick your favorite physical activity This can be almost anything! Try to pick an activity that you like to participate in, but you can pick anything you want. It could be hockey, tennis, wakeboarding, dancing, rock climbing, or even walking your dog! Almost ANY activity will work for this assignment. Step 2: Research the activity Get on the internet and learn about the activity you selected. Step 3: Write a brief report - 2 full paragraphs Be sure to include the following information in your report: - What activity you selected and why you selected it. - 2 health benefits of your activity. - 3 different muscles that your activity uses or "works out." - If participating in your activity presents any safety concerns. When you have finished your 2 full paragraphs, submit your assignment here!
Dancing is a physical activity which strengthens the abdominal and calf muscles as well as improves flexibility.
What is a physical activity?A physical activity is any activity which involves movement of the body in order to strengthen the muscles and to be physically fit.
Dancing is a physical activity which involves intricate and repeated movements of the body.
Dancing is beneficial because;
it helps to relieve stress it improves flexibility it builds muscle enduranceSome muscles involved in dancing include;
The abdominal muscles The quadricepsthe glutesSome risks in dancing include muscle injuries, dislocations and possibly fractures due to falls.
Therefore, a dancing routine strengthens the abdominal and calf muscles as well as improves flexibility.
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An excess of nitrogen reacts with 32.6 grams of hydrogen. What volume of ammonia is produced at STP? N2(g) + 3H2(g) 2NH3(g)?
the volume of ammonia produced at STP.
solution:Mass of hydrogen is 32.6g
Molar mass of H2 = 2 g/mol
Moles of H = 32.6g/2g/mol = 16.3mol
N2(g) + 3H2(g) —-> 2NH3(g)
The Mole ratio of H to NH3 is 3 : 1
32.6 mole of H = 1/3 x 16.3= 10.87 mol = 5.43mol
Moles of NH3 = 5.43mol
At STP moles = volume/molar volume, but molar volume = 22.4L/mol
Moles = volume/molar volume, volume = moles X molar volume
Volume = 5.43 mol x 22.4L/mol
= 121.63 L
Volume of NH3 = 121.63L
Matter is made of atoms that have positive centers of neutrons and protons
surrounded by a cloud of negatively charged electrons.
This statement is...
Answer:
the statement is a theory
Explanation:
How many moles of helium gas are present in a balloon with a volume of 950 ml a pressure of 3.47 atm and a temperature of 104 degrees celcius
Answer:
.107 moles
Explanation:
To find moles given the info above, we use a variation of the Ideal Gas Law,
mol = PV/RT, where P is in atm, V is in L, T is in K, and R is the gas constant
P=3.47 atmL= .950 LT= 377 KR= .08206mol= 3.47(.950) / 377(.08206)
=.107 moles H2Without conducting an experiment, how could you predict if a species in a solution is acidic or basic? Give some examples.
Without conducting an experiment, one can determine if a species in a solution is acidic or basic by using a litmus paper.
Litmus testAcidic species would turn a blue litmus paper to red but have no effects on red litmus paper.
Basic species would turn a red litmus paper to blues but have no effects on blue litmus paper.
Thus, in order to determine if a species in a solution is acidic or basic without conducting any experiment, dipping a litmus paper into the solution would give an indication.
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Haley recorded several notes in her lab journal about the experiment. Which of her notes below is an interpretation of the data that she collected?
Answer:
picture
Explanation:
i need the picture
we need a picture to
answer this sire
What are the names of the compounds below?
Answer:
See below ~
Explanation:
a. 3-hydroxy, 3-methyl hexaneb. 3-methyl butanolc. Methoxy methaned. Propoxy ethanee. Ethoxy methane#1
Here the functional group attached is OH(Alcohol) so we need to use -ol suffix
There are total 6 carbons in the straight chain .Naming should be started from functional group.At max there can be 4carbons in the chain then on left hand sideRight hand side is 2 carboned substituent i.e it's ethyl group
Hence the naming is
2-ethyl-2-methyl butanol#2
Start numbering from alcohol towards left end .
4 carbons chainPent prefix to be usedThe name is
3-methyl-butanol#3
O is at centre and two methyl groups are branched both sides
Methoxy Methane#4
O is at centre,left side propane ,right side methane
Propoxy ethane#5
Left side ethane,Centred O,Right side methyl.
Ethoxy methaneGet Brainliest quick!
In this food web, which organism eats meat-eaters?
A: 1
B: 6
C: 4
D: 3
Answer:
B.6
Explanation:
Organism is at the top and does not get eaten by anything else. That is why I think the correct answer is b :)
Have an amazing day!!
Please rate and mark brainliest!
Determine the number of atoms in 30.0g of Ne
Which answer best describes this reaction?
C is bonded above, left, and below to H, and right to a second C bonded above and below to H and to the right to a third C. That third C is double bonded above right to O and below right to O bonded to H + H bonded to O bonded to C bonded above and below to H and to the right to C. Also bonded above, below, and to the right to H right arrow C is bonded above, left, and below to H, and right to a second C bonded above and below to H and to the right to a third C. That third C is double bonded above right to O and below right to O. That O is bonded to C bonded above and below to H and to the right to C, bonded above, below, and right to H + H Subscript 2 Baseline O.
formation of an ester by condensation
formation of an ether by condensation
formation of a new product using a substitution reaction
formation of a new product using an addition reaction
Answer:
formation of an ester by condensation
Explanation:
Edge 2022
Looking at the reaction sequence as described in the question, the ester can be said to be formed by condensation.
What is condensation?A condensation reaction is one in which a new compound is formed by the loss of a small molecule such as water from the two reacting compounds.
Looking at the reaction sequence as described in the question, the ester can be said to be formed by condensation. Hydrogen ion is lost from the first compound and -OH from the second one which is an instance of condensation.
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6.11C In 1976, the Viking I Lander was sent to Mars to analyze atmospheric gases and soil samples. The Viking I Lander was most likely a
a space probe.
b lunar module.
c space shuttle.
d natural satellite.
A sample of gold has a mass of 38.6 grams and a volume of 2cm. What is the density of gold?
mass of the sample gold= 38.6g
volume =
[tex]2 {cm}^{3} [/tex]
to find:the density of the gold.
solution:D = m/V
[tex]m = 38.6g[/tex]
[tex] = 0.0386kg[/tex]
[tex]v = 2 {cm}^{3} [/tex]
[tex] = 0.000002 {m}^{3} [/tex]
then substitute the values.
[tex]d = \frac{0.0386}{0.000002} [/tex]
[tex]d = 19300kg | {m}^{3} [/tex]
therefore, the density of the sample gold is 19300kg/m3
HELP ME OUT PLS!!!!!!!!!
All stars begin their life in a
O black hole
O main sequence
O protostar
O nebula
nebula
↪ExplanationAll stars start in a large cloud of dust and gas called a nebula. Gravity can pull some of the gas and dust in a nebula together, forming a proto-star. A star is born when the gas and dust from a nebula become so hot and dense that hydrogen atoms are smashed together to form helium.
hope this helps...
What is the molarity of a solution that has 175 g of LICI in 1085 mL of solution?
Answer:
3.8 M
Explanation:
Mole weight of LiCl = 6.94 + 35.45 = 42.39 ( from periodic table)
175 g of this is then 175 / 42.39 = 4.13 moles
4.13 moles / (1085/1000) = 3.8 M
When 3.00 g of hydrogen reacts with 4.00 g of oxygen, 4.00 g of water is formed.
(a) What is the limiting reactant?
(b) What is the theoretical yield?
(c) What is the percent yield?
Question 11 options:
a)
(a) oxygen
(b) 4.51 g
(c) 88.7 %
b)
(a) hydrogen
(b) 4.51 g
(c) 88.7 %
c)
(a) oxygen
(b) 4.05 g
(c)13.0 %
d)
(a) hydrogen
(b) 4.05 g
(c) 13.0 %
Answer:
Answer A
Explanation:
2 H2 + O2 = 2 H2O
knowing the mole weights of these elements shows O2 is the limiting reactant in this situation.
4 g oxygen is 4 /31.998 = .125 mole O2
We should get two times these moles of water = .250 moles
weight = .250 (1.008 * 2 + 15.999) = 4.50 gm H20 (theoretical)
....but we only got 4 gm
4/4.50 = 88.8%
5. When you breathe, your lungs absorb oxygen
and release carbon dioxide. Which of these are
your lungs releasing?
(1) O
(2) O2
(3) CO
(4) CO2
(5) NH3
what happens when muscle cells are triggered?
Answer:
When myocytes (aka muscle cells) are triggered at a certain point for awhile it can cause strain and pain throughout the muscle.
what is the molar mass of slicon
Answer:
28.0855 grams per mole
How many molecules are in 0.400 moles of dinitrogen pentoxide
Explanation:
The number of moles of a substance is represented by the following formula:
n=NNA
where, n
is the number of moles of the substance, N
is the total number of molecules present in a substance, andNA
is the Avogadro constant.
The given compound is N2O5
So one mole of N2O5
contains 6.023×1023
numbers of molecules. Thus the 0.400
moles of N2O5
contains a number of molecules => 0.400moles×6.023×10^23
.
=> 2.41×10^23 molecules.
there are 2.41 thats the anwser
2.Uranium-235 has a half-life of about 700 million years. If 1 kg of U-235 is put on a shelf in
a laboratory, how much of it will be left after 700 million years? (5 points)
Answer:
.5 kg
Explanation:
At the start of Uranium-235 there is a total of 1 kg. Uranium-235 half life is 700 million years, take 1kg ÷2 = 0.5kg after 1 half life.
Let's say another 700 million years go by that means you take 0.5kg and divide that by 2.
0.5kg÷2= 0.25 kg is left after 2 half lives.
Hope this helps good luck!
Can marble turn back into limestone?
Answer:
the alteration of limestone by heat and pressure.
Explanation:
Answer:
YES :)
Explanation:
How does marble turn back into Limestone?
»MARBLE is a Metharopic rock formed by the alternation of Limestone by heat and pressure
»The calcite in the limestone changes and fosills and layering in the original limestone disappear as interlocking grains grow.
»If the limestone is pure ,a white marble is formed
What type of microorganism turns milk into yogurt?
For yogurt production, probiotic bacteria and the Streptococcus thermophilus strain work together to produce a stable balance of bacteria in the culture.
what major organic product would you expect to obtain when acetic anhydride reacts with ch3ch2ch2oh nh3
The major product of the reaction between acetic anhydride and CH3CH2CH2OH is CH3COOCH2CH2CH3. While, the major product of the reaction between acetic anhydride and NH3 is CH3CONH2.
What is acetic anhydride?Acetic anhydride is the compound (CH3COO)2. It is a precursor for the synthesis of many organic compounds.
Now let us consider the use of acetic anhydride in synthesis. The major product of the reaction between acetic anhydride and CH3CH2CH2OH is CH3COOCH2CH2CH3. While, the major product of the reaction between acetic anhydride and NH3 is CH3CONH2.
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Aerobic decomposition of organic matter requires
A.nitrogen.
B.oxygen.
C.carbon dioxide.
D.water.
Answer:
Option B: Oxygen.
Explanation:
Hope this helped.
For the reaction 2N2O5(g) → 4NO2(g) + O2(g) which of the following expressions is equal to the rate of the reaction?
Answer:
Rate=k[N2O5]^2
Explanation:
It is more accurate to determine the rate law using experimental data instead of stoichiometry. The answer I just gave was derived from stoichiometry.
The correct expression for the rate of the reaction [tex]\rm 2N_2O_5(g) ---- > 4NO_2(g)[/tex]+ O2(g) is Rate = Δ[[tex]\rm N_2O_5[/tex]] / (2Δt). Therefore, the correct option is B.
In the chemical equation, 2 moles of [tex]\rm N_2O_5[/tex]result in 4 moles of [tex]\rm NO_2[/tex]. The rate expression for the reaction can be expressed on the basis of stoichiometry as follows:
Rate = -Δ[[tex]\rm N_2O_5[/tex]] / (2Δt)
Because of the stoichiometric coefficient of 2, this expression shows that the rate of reaction is equal to the rate of decomposition of [tex]\rm N_2O_5[/tex]divided by 2. Since [tex]\rm N_2O_5[/tex]is a reactant in the forward process, the negative sign means that its concentration is decreasing with time. ,
Therefore, the correct option is B.
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Your question is incomplete, most probably the complete question is:
For the reaction 2N2O5(g) → 4NO2(g) + O2(g) which of the following expressions is equal to the rate of the reaction?
A) Rate = -Δ[N2O5] / Δt
B) Rate = Δ[N2O5] / (2Δt)
C) Rate = -Δ[NO2] / Δt
D) Rate = Δ[NO2] / (4Δt)