Answer:
A substance that produces hydrogen gas when dissolved
What is the pH of .0003 M of NaOH
We are given that the concentration of NaOH is 0.0003 M and are asked to calculate the pH
We know that NaOH dissociates by the following reaction:
NaOH → Na⁺ + OH⁻
Which means that one mole of NaOH produces one mole of OH⁻ ion, which is what we care about since the pH is affected only by the concentration of H⁺ and OH⁻ ions
Now that we know that one mole of NaOH produces one mole of OH⁻, 0.0003M NaOH will produce 0.0003M OH⁻
Concentration of OH⁻ (also written as [OH⁻]) = 3 * 10⁻⁴
pOH of the solution:
pOH = -log[OH⁻] = -log(3 * 10⁻⁴)
pOH = -0.477 + 4
pOH = 3.523
pH of the solution:
We know that the sum of pH and pOH of a solution is 14
pH + pOH = 14
pH + 3.523 = 14 [subtracting 3.523 from both sides]
pH = 10.477
A particle that has the electron configuration 1s²2s²2p³ would:
Have 2 filled orbitals and 3 partially filled orbitals.
Be able to bond with 2 hydrogens.
Have an electron configuration of a noble gas.
Have the electron configuration of an alkali earth metal.
Answer:
Have 2 filled orbitals and 3 partially filled orbitals.
Explanation:
Hello there!
In this case, according to the given information of the electron configuration for that particle; it is possible for us to infer it has 5 valence electrons, as the electrons on its outermost shell (2). Moreover, we undertand this particle needs three bonds, does not have neither the electron configuration of a noble gas which ends by p⁶ nor that of an alkali earth metal as it ends by s².
Therefore, we infer the correct answer is Have 2 filled orbitals and 3 partially filled orbitals because according to the Hund's rule, the s orbital is fulfilled and the p orbital has 1 electron orbital fulfilled and two partially filled orbitals.
Regards!
9.When two protons combine to form one nucleus, the result is one proton and one
neutron. How did the one proton become a neutron?
Answer:
josephmelichar
Explanation:
In the first step, 2 protons combine. In doing so one of the protons will convert into a neutron by losing a positron (positive electron) and a neutrino; this is also known as beta decay. This changes one of the protons (positive charge) into a neutron (neutral charge) and allows the two particles to combine.
Mixed Practice:
For questions 6-9, you may not have to use your entire flow chart. Decide where to start and end using your flow chart.
4NH3 + 5O2 → 4NO + 6H2O
MM NH3 = 17.04 g/mol; MM O2 = 32 g/mol; MM NO = 30.01 g/mol; MM H2O = 18.02 g/mol
In the above reaction, how many moles of NO are formed if 824 g of NH3 react?
27.5 mol
3510 mol
48.4 mol
774 mol
Given
Mass of NO - 824 g
Molar mass of NO - 30.01g/mol
No of moles of NO = Given mass/Molar mass
No of moles of NO = 824/30.01= 27.45 mole
Hence 27.5 moles of NO are formed!
if you wanted to create 500g of calcium carbonate how much calcium chloride and sodium carbonate would you need?I need help please anyone. It's using stiochonometry and limiting reagent both or either one I don't know. But please help me
Mass of Calcium Carbonate = 500 grams
The required reaction would be:
CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl
Number of moles of CaCO₃:
Number of moles = given mass / molar mass
Number of moles = 500 / 100 [molar mass of CaCO₃ = 100g/mol]
Number of moles = 5 moles
Using the power of stoichiometry!!!
CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl
from the balanced reaction listed above, we can see that one mole of CaCl₂ and one mole of Na₂CO₃ produces one mole of CaCO₃
Moles of CaCl₂ = Moles of Na₂CO₃ = Moles of CaCO₃
we just solved for the number of moles of CaCO₃, which gives us
Moles of CaCl₂ = Moles of Na₂CO₃ = 5 moles
Hence, 5 moles of CaCl₂ and Na₂CO₃ each is required
is this correct yes or no?
Answer:
I believe so. If I get this wrong I'm sorry.
Explanation:
pls help i will mark brainliest Part D
Look back at your answer to part A. So far, you haven't added anything to the flask or removed
anything from it. Also, the contents of the flask have returned to the same temperature that they
were in part A. Considering the appearance of the solution in the flask, is the solution unsaturated,
saturated, or supersaturated? Explain your reasoning.
Answer:
Hello, Im Mack. Hope you're doing well. :)
Here is my Correct, custom answer for the lab Question, (I also took the same assignment and got a 100% score)
Explanation:
The heating of the sodium acetate solution made it change from super-saturated to un-saturated. Yet now that it cooled back to room temperature Im sure it is saturated. it wasn't able to disolve the excess sodium acetate left over at room temperature and had to be heated so now that it is back to room temperature I Think it will not disolve the sodium acetate left in the solution until it is heated again.
Hope this helped you out,
Please feel free to comment for further help, and I'll reply asap.
Have a great day my friend :)
Help Plz Which of these which substances do you think will conduct electricity when
dissolved in water? (Select all that apply)
A.Select all that apply:
B.Lithium Bromide: LiBr
C.Dimethyl Sulfoxide: C2HOS
D.Octadecanol: C18H380
E.Potassium Chloride: KCI
Answer:
Lithium Bromide: LiBr and Potassium chloride: KCl.
Explanation:
A substance that will conduct electricity when dissolved completely in water is known as an Electrolyte.
Now, electrolytes are usually salts that ionize completely in a solution unlike non - electrolytes that do not dissociate into ions in solution.
Looking at the options, the only ones that are Salts are Lithium Bromide: LiBr and Potassium chloride: KCl.
Thus, options
Lithium Bromide: LiBr and Potassium Chloride: KCI will conduct electricity
when dissolved in water.
Electrolytes are referred to as compounds which conduct electricity when
dissolved in water. A salt is a common example of a compound which
dissolves in water to generate electricity which makes it an electrolyte.
In the options the salts present are Lithium Bromide and Potassium
Chloride which is why options B and D are the most appropriate choice.
Read more about Salts here https://brainly.com/question/13818836
Which 2 minerals are present in mafic igneous rock but not found
in felsic igneous rocks?
Answer: Mafic rocks are dominated by plagioclase and pyroxene (even if you can't see them with the naked eye) and smaller amounts of olivine. Intermediate rocks are roughly even mixtures of felsic minerals (mainly plagioclase) and mafic minerals (mainly hornblende, pyroxene, and/or biotite). There is little or no quartz.
HOPE THIS HELPS
Which of the following is the BEST description of a budget? *
10
Answer:
A budget is an estimation of revenue and expenses over a specified future period of time and is usually compiled and re-evaluated on a periodic basis. Budgets can be made for a person, a group of people, a business, a government, or just about anything else that makes and spends money.
An unknown solution has a pH of 6.8. Which of these chemicals is likely to increase the pH the most when added to the solution? (5 points)
a
NaOH
b
HCl
c
NH3
d
HNO3
Answer:
NaOH
Explanation:
An unknown solution has a pH of 6.8. The chemical that will increase the pH is NaOH. The correct option is a.
What are acid and bases?
Acids have lower pH, and they are sour and bases have high pH, and they are bitter in taste.
HCl, NH3, HNO3 are all acids and acid decrease the pH. Only NaOH is a base, and it will increase the pH.
Thus, the correct option is a. NaOH.
Learn more about acid and bases
https://brainly.com/question/23687757
#SPJ2
A sample of a food label is shown below.
Example: Cereal Box
Calories per serving - 167
Total fat - 3 grams
Total saturated fat - 1 gram
Cholesterol - 0mg
Sodium - 250mg
Total carbs - 32 grams
Dietary fiber - 4 grams
Sugars - 11 grams
Protein - 3 grams
Servings per container 5
(a) Is the Calories per serving correctly written? Show your calculation.
(b) Calculate the percent from carbohydrates per serving.
(c) Calculate the Calories if you eat one box of the cereal.
Answer:
A) It's correctly written
B) 77%
C) 835 calories
Explanation:
A) From online sources, we have number of calories as follows;
Fats: 9 calories per gram
Protein; 4 calories per gram
Carbs; 4 calories per gram
Total calories for each;
Total fat = 3 × 9 = 27 calories
Total protein = 3 × 4 = 12 calories
Total carbs = 32 × 4 = 128 calories
(sugar and dietary Fibre are classified as carbohydrates and so total carbs takes care of their calories).
Thus, total number of calories per serving = 27 + 12 + 128 = 167 calories per serving which is same as what is given.
B) percent from carbohydrates per serving = total calories from carbs/total number of calories per serving × 100% = 128/167 × 100% ≈ 77%
C) One box contains 5 servings. Thus total number of calories per box = 167 × 5 = 835 calories
What is the mass of 564 liters of oxygen in kilograms?
What is sound? it is a form of energy produced by ____________.
A. conduction C. convection
B. radiation D. vibration
Answer:
D
Explanation:
sound is produced when the matter vibrates
Answer:
D
Explanation:
the sound that is made is basically energy. This energy we call it vibration
80.0 mL of oxygen gas was collected when the temperature was
20.0°C. How many milliliters will the oxygen occupy if the
temperature changes to 54.0°C?
A. 1200 mL
B. 216 mL
C. 71.7 ml
D. 89.3 mL
(Please show your work)
Answer:
89.3 mL
Explanation:
First we convert 20.0 °C and 54.0 °C to K:
20.0 °C + 273.16 = 293.16 K54.0 °C + 273.16 = 327.16 KWith the absolute temperatures we can solve this problem by using Charles' law:
T₁V₂=T₂V₁Where in this case:
T₁ = 293.16 KV₂ = ?T₂ = 327.16 KV₁ = 80.0 mLWe input the data:
293.16 K * V₂ = 327.16 K * 80.0 mLAnd solve for V₂:
V₂ = 89.3 mLWhich is the best description of a cyclone?
a dust storm
rapidly changing weather in an area
a type of tornado
an area of low air pressure
How many moles of silver chloride, produced from 100 g of silver nitrate reacting with barium chloride BaCl2?
Answer:
Equation of Reaction
2AgNO3 + BaCl2 === 2AgCl + Ba(NO3)2
Molar Mass of AgNO3 = 170g/mol
Moles of reacting AgNO3 = 100g/170gmol-¹
=0.588moles of AgNO3
From the equation of reaction...2moles of AgNO3 reacts to Produce 2Moles of Silver Chloride
So Their ratio is 2:2.
This means that 0.588Moles of AgCl Will be produced too.
ANSWER...0.588MOLES OF AgCl WILL BE PRODUCED.
What element in group 1 is not considered an alkali metal?
A. Hydrogen (H)
B. Lithium (Li)
C. Potassium (K)
D. Cesium (Cs)
Answer:
A
Explanation:
Hydrogen isn't an alkali metal
Answer:
hydrogen
Explanation:
hydrogen is a gas not a metal
Learning Task 2: Give the missing number in the equation below.
1.6+ = 5 + 6
2. (9×_)×4=×(2×4)
3.(1 x 4) x 0 = x (_x 0 )
4. 17 + = 19 + 17
5. (13+6)+7=13+(+)
pasagutan po thank s
Answer:
The answers are in the explanation.
Explanation:
1. Commutative property: The order of the numbers does not affect the result:
6 + 5 = 5 + 6
2. Associative property: In add or multiply, you can operate regardless of how the numbers are grouped.
(9×2)×4=9×(2×4)
3. Associative property:
(1 x 4) x 0 = 1 x (4x 0 )
4. Commutative property:
17 + 19 = 19 + 17
5. Associative property:
(13+6)+7=13+(6+7)
Give an example to illustrate the difference between "paying more in taxes ” and paying a higher tax rate .
A sample of gas has an initial pressure of 1.5 atm, an initial volume of 3.0 L, and an initial temperature of 293K. If the final pressure is 2.5 atm and the final
temperature is 303K, what will the final volume be?
Answer:
1.9 L
Explanation:
Step 1: Given data
Initial pressure (P₁): 1.5 atmInitial volume (V₁): 3.0 LInitial temperature (T₁): 293 KFinal pressure (P₂): 2.5 atmFinal volume (V₂): ?Final temperature (T₂): 303 KStep 2: Calculate the final volume of the gas
If we assume ideal behavior, we can calculate the final volume of the gas using the combined gas law.
P₁ × V₁ / T₁ = P₂ × V₂ / T₂
V₂ = P₁ × V₁ × T₂ / T₁ × P₂
V₂ = 1.5 atm × 3.0 L × 303 K / 293 K × 2.5 atm = 1.9 L
Please help I need the answer now!!!
Answer:
The answer is A: (more below)
Liquid A: Neutral
Liquid B: Acid
Liquid C: Base
Explanation:
Ph scale: 1 - 6 are acids, 7 is neutral, 8 - 14 are bases.
14
13
12
11
10
9
8
7
6
5
4
3
2
1
when aluminium and chlorine compared , which has smaller atomic size ? Why ?
aluminium has bigger atomic size than chlorine
because atomic radii decreases across the period and increases down the group
this law would hold owing to the fact that chlorine and aluminum are on the same period
How much energy is contained in the six-cookie serving size recommended on the label?
Monounsaturated Fat 1g
A compound is made by carbon, hydrogena and nitrogen and 1 g of this compound contains 91.5 mg of hydrogen and 424 mg of nitrogen. What is the molecular formula given that the molar mass is about 65 g/mol? (write the formula with elements in this sequence HNO)
Answer:
C₄H₃N
Explanation:
To solve this question we must find the moles of each atom in order to find the empirical formula (Simplest ratio of atoms present in a molecule). With empirical formula and the molar mass of the compound we can find the molecular formula as follows:
Moles H:
91.5mg H * (1mmol / 1mg) =
91.5mmol H
Moles N:
424mg N * (1mmol / 14mg) =
30.286mmol N
The ratio of moles regard to moles N (The lower number of moles is:
H = 91.5mmolH / 30.286mmolN = 3.0
N = 30.286mmolN / 30.286mmolN = 1
empirical formula = CₓH₃N
The molar mass of this formula is:
12*x + 1*3 + 1*14 = 17g/mol
Solving for X:
12X + 17g/mol = 65g/mol
12X = 48g/mol
X = 4
There are 4 atoms of carbon and molecular formula is:
C₄H₃NHow many grams of NiNi are formed from 55.3 g of Ni2O3?
2Ni2O3(s)⟶4Ni(s)+3O2(g)
Answer:
39.2 g
Explanation:
2Ni₂O₃(s) ⟶ 4Ni(s) + 3O₂(g)
First we convert 55.3 g of Ni₂O₃ into moles, using its molar mass:
55.3 g ÷ 165.39 g/mol = 0.334 mol Ni₂O₃
Then we convert 0.334 Ni₂O₃ moles into Ni moles, using the stoichiometric coefficients of the balanced reaction:
0.334 mol Ni₂O₃ * [tex]\frac{4molNi}{2molNi_2O_3}[/tex] = 0.668 mol Ni
Finally we convert 0.668 Ni moles into grams, using its molar mass:
0.668 mol * 58.69 g/mol = 39.2 g
In volcanic areas, groundwater heated by magma is a source of
a.
lava flows.
b.
silica.
c.
geothermal energy.
d.
pyroclastic flows.
Answer:I believe it is c.
Explanation:
Answer:
C., or "geothermal energy."
NEED HELP ASAP PLEASE!
4 NH3(g) + 5 O2(g) --> 4 NO(g) + 6 H2O(g)
You need 16 moles of NO(g). How many moles of O2 do you need to start with?
Answer:
20 moles of o2
5 moles=4moles
?moles=16moles
Bromine, a brick red liquid, has a density of 3.12 g/mL at room temperature. What is the mass of 25.6 mL of bromine?
Answer:
3.12 x 25.6 = 79.9 g
Use the diagram above to answer the question. Each of the containers shown above holds a 1L volume. Which container has the
greatest number of gas molecules? Assume all containers are at the
same temperature. *
(Look at the picture)
А
B
С
D
(Explain why is this the correct answer)
Option A is correct.
This is because atoms get compressed when the pressure increases and takes less space, on the other hand, the atoms get expanded when pressure decreases and hence take more space.