Answer:
Synthesis Reaction
Explanation:
Here we see H2 and O2 are being combined H2O. Synthesis reactions are where we see a combination to make a single product.
So here it'd be A + B =AB
2Na(s)+Cl2(g)→2NaCl(s)
Decomposition would be the break down of a compound into 2, the opposite of synthesis.
AB = A + B
2HgO(s)→2Hg(l)+O2(g)
Single replacement is where 1 element replaces another in a reaction, or switches place with 1 element.
AY + B = A + BY
2 HCl(aq) + Zn(s) → ZnCl2(aq) + H2(g)
Double replacement is similar but 2 elements are switch/replaced.
AY + BX = AX + BY
CuCl2(aq) + 2 AgNO3(aq) → Cu(NO3)2(aq) + 2 AgCl(s)
When an organism eats a plants,the energy and nutrients stored in the consumed organism flows up to the____level
Answer:
Energy is transferred between trophic levels when one organism eats another and gets the energy-rich molecules from its prey's body.
Explanation:
The flow of energy in an ecosystem is always linear ie uni direction. At each energy step in food chain, the energy received by the organisms is used for its own metabolism and maintenance. The left over energy is passed to next higher trophic level. Thus the energy flow decreases with successive trophic level.
please write the equation and help me solve. please no links
Answer: The molality of solution is 1.2 mole/kg
Explanation:
Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent.
[tex]Molality=\frac{n}{W_s}[/tex]
where,
n = moles of solute
[tex]W_s[/tex] = weight of solvent in kg
Given : 10 g of glycerol is present in 100 g of solution
moles of glycerol = [tex]\frac{\text {given mass}}{\text {molar mass}}=\frac{10g}{92g/mol}=0.108mol[/tex]
mass of water (solvent )= (100-10) = 90 g = 0.09 kg
Now put all the given values in the formula of molality, we get
[tex]Molality=\frac{0.108mol}{0.09kg}=1.2mole/kg[/tex]
Therefore, the molality of solution is 1.2 mole/kg
Which ones are soluble in water and which ones are not soluble in water.
a. NH4CH3COO Ammonium acetate soluble
b. Ba(OH)2 Barium hydroxide soluble
c. FeCO3 Iron (II) Carbonate insoluble
d. NaOH Sodium hydroxide soluble
e. RbNO3 Rubidium nitrate soluble
Answer:
d. NaOH Sodium hydroxide soluble
How many moles can be found in 1.5 x 10^24 atoms of Calcium?
When the concentration of reactant molecules is increased
Complete question is;
When the concentrations of reactant molecules are increased, the rate of reaction increases. The best explanation for this phenomenon is that as the reactant concentration increases,
A)the average kinetic energy of molecules increases.
B)the frequency of molecular collisions increases.
C)the rate constant increases.
D)the activation energy increases.
E)the order of reaction increases.
Answer:
B) The frequency of molecular collisions increases.
Explanation:
When we increase number of reactant molecules, the effective collision between the reactant molecules will form a product which also increases. As a result, the overall rate of the reaction will also increase which means the frequency of the molecular collision will also increase as well.
Thus, the correct answer is Option B
3. Calculate the number of nickel atoms in a 5-cent coin of mass 0.942g if it was made of an alloy consisting of 75% copper and 25% nickel.
The melting of ice is considered a/an _______ because the ice absorbs heat from the surroundings.
Question 3 options:
A)
chemical reaction
B)
thermochemical process
C)
exothermic process
D)
endothermic process
Answer:
the correct answer is D
Explanation:
Basically, melting ice is an endothermic reaction because the ice absorbs (heat) energy, which causes a change to occur.
C. 2.86 g
D. 1.22 g
13. At what Kelvin temperature will 25.2 mol of Xe occupy a volume of 645 L at a pressure of 732 torr?
A. 361 K
B. 291 K
C. 402 K
D. 300 K
The pH of an acidic solution is 5.59. What is [H+]?
Answer:
[H⁺] = 2.57x10⁻⁶ M
Explanation:
This problem can be solved using the definition of pH:
pH = -log[H⁺]
Now we isolate [H⁺] in the equation:
-pH = log[H⁺]
[tex]10^{-pH}[/tex]=[H⁺]
As we are given the pH by the problem, we can now proceed to calculate the [H⁺]:
[H⁺] = [tex]10^{-5.59}[/tex]
[H⁺] = 2.57x10⁻⁶ M
Thus, when the pH of a solution is 5,59; the molar concentration of H⁺ species is 2.57x10⁻⁶.
Composition of the air breathed in and the air breathed out changes
Answer:
breathed in air contains oxygen while breathed out air contains higher percentage of CO2
r.
25. An organic compound (A) C3H5N, undergoes reduction with
LiAlHe to give (B), CzHgN. Compound (B) reacts with
chloroform and KOH to give an unpleasant smell. Compound
(B) reacts with sodium nitrite and hydrochloric acid to give
(C), C3H80, which on treatment with conc. H2SOа acid gives
(D) C3H6. (D) on reaction with conc. H2SO4 and subsequent
hydrolysis yield an isomer of (C). Identify A, B, C, D with
proper explanation and chemical reactions.
frivolont metal was
Answer:
A - Nitrile compound
B- AlkylAmine
C- Alcohol
D - Alkene
Explanation:
(A) undergoes reduction to form alkylamine.
(B) is a primary alkyl amine which on carbylamine test gives a foul smell.
(B) reacts with NaNO2 + HCl undergoes diasotisation following which alcohol is produced.
(C) being a alcohol undergoes hydrolysis to give alkene.
(D) On further reaction with H2S04 by the rule of Markownikoff rule it forms a isomer of (C).
can someone help me with 5?
Answer:28 g
Explanation:
HI(aq)+NaOH(aq)→
what the final balanced chemical equation with the phases included
Answer:
[tex]HI(aq)+NaOH(aq)\rightarrow NaI(aq)+H_2O(l)[/tex]
Explanation:
Hello there!
In this case, for this neutralization reaction, it is possible to realize that one the neutralization products is water (pH=7) and the other one is the salt coming up from the cation of the NaOH and the anion of the HI:
[tex]HI(aq)+NaOH(aq)\rightarrow NaI+H_2O[/tex]
Moreover, since the solubility of NaI is large in water, we infer it remains aqueous whereas the water is maintained as liquid:
[tex]HI(aq)+NaOH(aq)\rightarrow NaI(aq)+H_2O(l)[/tex]
Which is also balanced as the number of atoms of all the elements is the same at both sides.
Best regards!
make a chart to show the effect of Sodium Hydroxide and Sulphuric acid on methyl orange and red litmus paper
Answer:
mark me as brainliest plsss
Hence in the Sodium hydroxide, methyl orange will turn into yellow color and in Sulfuric acid shows red color. Red litmus will turn into blue color in the Sodium hydroxide solution.
What is litmus paper?Litmus paper is a paper which is used to identify the acidity or basicity of any solution.
Sulfuric acid is acidic in nature, and red litmus paper shows no effect in this acid as red paper change into blue in the presence of base. Methyl orange is an indicator and it shows red color in the acidic medium.Sodium hydroxide is basic in nature and red litmus paper will change into blue in this solution and color of methyl orange changes from red to yellow in the basic solution.Hence, the effect of red litmus & methyl orange is explained above.
To know more about litmus paper, visit the below link:
https://brainly.com/question/1287856
The equation for the formation of ammonia from nitrogen and hydrogen is shown below. What is the formula for the equilibrium constant, Kc? {Hint, I’m just looking for letters/symbols, not numbers.}
H2(g) + N2(g) ⇌ NH3(g)
First, make sure to balance your equation.
3H2(g) + N2(g) ⇄ 2NH3(g)
Now, you can write your Kc expression. Remember that Kc is products over reactants, and the exponent for each product or reactant is based on its coefficient.
Kc = [NH3]^2 / [H2]^3[N2]
The reaction between nitrogen and hydrogen is called the Haber process. Kc for the reaction is the ratio of the concentration of ammonia to nitrogen and hydrogen.
What is the equilibrium constant?An equilibrium constant, kc is the concentration proportion of the products to the concentration of the reactants raised by their respective coefficients.
The balanced chemical Haber process is given as:
[tex]\rm 3H_{2}(g) + N_{2}(g) \leftrightharpoons 2NH_{3}(g)[/tex]
Now, the equilibrium constant for the reaction can be given as:
[tex]\rm Kc = \rm \dfrac{[NH_{3}]^{2}}{[H_{2}]^{3}[N_{2}]}[/tex]
Therefore, the ratio of the concentration of ammonia to hydrogen and nitrogen gives the equilibrium constant.
Learn more about the equilibrium constant here:
https://brainly.com/question/15116048
How
many mols are in 151 g of dinitrogen monoxide?
Answer:
3.43 moles
Explanation:
To convert moles into grams you must take the number of grams and divide it by the atomic mass of the compound.
in this case, grams is 151 and N2O has an atomic mass of 44.013
so your equation would look like
151/44.013=3.430804535
your answer would be 3.43 moles
charles law . who can please help me with these two problems asap ?
Answer:
k
Explanation:
Choose the appropriate electron configuration for an element that has electrons in six orbitals.
Group of answer choices
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p4
1s2 2s2 2p6 3s1
1s2 2s2 2p5
Answer:
pagtoon og imo dotsExplanation:
pagtoon og imo dotsWhich of the following is not the name of an amino acid?
A. Lysine
B. Valine
C. Methane
D. Phenylalanine
(Edge)
Answer:
C. Methane
Explanation:
Hopefully this isnt too late!
Answer:
C. Methane
(Photo for proof at the bottom.)
Explanation:
All amino acids contain an amino group, a carboxyl group, and an R group. An amino group consists of NH2. A carboxyl group consists of COOH. And an R group usually consists of a hydrogen or carbon atom bonded to the amino acid. Methane only consists of CH4, which clearly does not meet the criteria of an amino acid.
Here's a photo of Edge incase you're doubtful.
Please click the heart if this helped.
Is liquid ammonia a household acid?
Yes it is an cleaning product
Answer:
yes
Explanation:
it cleans in the house
A potential energy diagram is shown. What is the activation energy of this reaction?
a. 50 kJ
b. 100kJ
c. 150kJ
d. 200kJ
Answer: a. 50 kJ
Explanation: good luck
1
is the amount of space
that matter in an object occupies.
c. Write P on the line if the given object possesses potential energy and Krit
possesses kinetic energy.
1. Bouncing ball
2. Swinging chimes
3. Toys on the floor
4. Drinking glass on a table
5. Rotating blades of an electric fan
6. Moving car
7. Skater standing still
8. A running athlete
9. Planets orbits in its axis
10. lamp
Answer:
1 K
2 P
3 P
4 P
5 K
6 K
7 K
8 P
9P
10 K
CsBr formula name???
Answer
PubChem CID/molecular formula
Explanation:
Cesium bromide
PubChem CID 24592
Molecular Formula CsBr or BrCs
Synonyms CESIUM BROMIDE 7787-69-1 Caesium bromide Cesiumbromide Cesium bromide (CsBr) More...
Molecular Weight 212.81 g/mol
Component Compounds CID 260 (Hydrogen bromide) CID 5354618 (Cesium)
have a good day /night
may i please have a branllist
True or False: Having a greater volume definitely means a lower concentration (molarity) solution
Having a greater volume definitely means a lower concentration (molarity) of solution. So, the statement is true.
What is meant by molarity of a solution ?Molarity of a solution is defined as the number of moles of solute present per unit volume of solution.
Here,
Since, the number of moles of solute in one litre of solution is known as the molarity, we can say that the change in volume of the solution will affect the molarity of the solution.
Molarity, M = n/V
where n is the number of moles of solute and V is the volume of solution
From the equation, we can say that the molarity of the solution is inversely proportional to its volume.
We know that, molarity of a solution is a temperature dependent parameter.
As the volume of the solution increases, the temperature also increases( Volume [tex]\alpha[/tex] Temperature). When the temperature increases, it affects the molarity of the solution such that the number of moles remains constant and as a result of the increasing volume, the molarity decreases.
Hence,
Having a greater volume definitely means a lower concentration (molarity) of solution.
To learn more about molarity, click:
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Calculate the mass of each element in the
compound by multiplying its molar mass by the
number of moles of the element present in one
mole of the compound
Mass N =
Mass H =
Mass O =
Answer:
For Mass N, Mass H, and Mass O, the mass is 28.0 g N, 4.0 g H, and 48.0 g respectively
Explanation:
The computation of the mass of each element is given below:
As we know that
A1 mole of ammonium nitrate i.e. 2 mol N, 4 mol H, 3 mol
Now we multiply each of above by the molar masses
For N
= 14.0 g/mol × 2
= 28.0 gN
For H
= 1.0 g/mol × 4
= 4.0 gN
ANd, for O
= 16.0 g/mol × 3
= 48.0 gN
Hence, For Mass N, Mass H, and Mass O, the mass is 28.0 g N, 4.0 g H, and 48.0 g respectively
Answer the following question by studying the given
structure of the stoma
1)Name the atoms of element
2)In which group of the periodic table do these element lie?
Answer:
1) A. carbon B. oxygen
2) A. semi metal. B. Non- metal( gas)
A 50.0 mL sample of buffer solution contains 0.120 M acetic acid and 0.150 M sodium acetate. If 5.55 mL of 0.092 M NaOH is added to this solution, identify the resulting number of moles of acetic acid, sodium acetate, and NaOH.
Answer:
see calculations below
Explanation:
Given: HOAc ⇄ [H⁺] + [OAc⁻]
C(i) 0.12M 0M 0.15M
mix => 5.55ml(0.092M NaOH) / (50ml + 5.55ml)
= 0.00555(0.092)mole NaOH / 0.0555 L Soln
= 0.0092M in NaOH is added into the initial buffer solution
= 0.0092M in OH⁻ (NaOH is a strong base => 100% ionized)
Rxn => Addition of 0.0092M OH⁻ will react with 0.0092M H⁺ shifting buffer . equilibrium to the right decreasing [HOAc] and increasing [OAc⁻] by . 0.0092M each.
Therfore ...
Given: HOAc ⇄ [H⁺] + [OAc⁻]
C(i) 0.12M 0M 0.15M
ΔC - 0.0092M +x +0.0092M
C(f) 0.1108M x 0.1592M => New Concentrations . after adding 0.0092M . NaOH
Substituting new acid and ion concentrations into Ka expression ...
Ka = [H⁺][OAc⁻]/[HOAc] = (x)(0.1592M)/(0.1108M) = 1.75 x 10⁻⁵M
=> x = [H⁺](new) = (1.75 x 10⁻⁵M*)(0.1108M)/(0.1592M) = 1.22 x 10⁻⁵M in H⁺ ions
*units of Ka are Molar
FYI => Adding a strong base to a buffer solution will shift pH to more basic.
Adding a strong acid to a buffer solution will shift pH to more acidic.
=> (such is a good way to check that your buffer calculations are correct.)
NOTE => Question asks for moles of HOAc, Na⁺OAc⁻ & NaOH after adding base. Giving answers in terms of Molarity (moles/Liter) is same as moles. Therefore ...
[HOAc] = 0.1108M
[NaOAc] = 0.1592M
[NaOH] = ∅M (from rxn of H⁺ + OH⁻ => H₂O, all NaOH was consumed in acid/base reaction. Remaining are only Na⁺ as a spectator ion and OH⁻ as a function of the new concentration of H⁺ => [OH⁻] = Kw/[H⁺] = 1 x 10⁻¹⁴/1.22 x 10⁻⁵ = 8.2 x 10⁻¹⁰M.
Hope this helps. :-)
An example of a property that could change only if a chemical
change occurs is
a
size.
b shape.
C volume.
d flammability.
Answer:
d flammabilty
Explanation:
flammability is a property of a chemical change
Image shown below of a chemistry question i would really appreciate the help
.Answer:
2kclo3 --> 2kcl + 3o2 is a decomposition reaction because it is breaking apart (thinks decompose- to break apart/down)
H2 + I2 --> 2HI is a synthesis reaction because synthesis is like creation/ building
think DNA synthesis or the book of genesis in the bible about creation
2 Na + 2 H20 --> NaOH + H2 --- not balanced at all
other one is a balanced equation- the Zn + 2HCl one
Explanation: