Answer:
5.4 g Na
Explanation:
Calculate the mass of sodium chloride from both reactants. The lesser value is the amount is the theoretical yield. Subtract the mass of the calculated mass of sodium chloride from the mass of the reactants.
From acetic acid how to get formic acid ?
Answer:
The Reaction of acetic acid withNaN3 gives out methylamine. rxn of methylamine to HNO2 to give out methanol. oxidation of methanol via Kcr207(H+) to give formic acid.
c. What might have happened in Kush and Egypt if Kush had developed iron
weapons?
Answer:
Kush would have been able to fight better and probably would have never been invaded by Egypt, and they could have beaten the Assyrians when they tried to takeover Egypt. And the 25th dynasty would have continued.
Explanation:
that is my explanation and answer^
What is the visual differences between elements compounds and mixtures
Answer: yes I can do that tomorrow
Explanation:
WILL BRAINLIEST !!
Which of the following transitions produces light with the longest wavelength?
A. 2—>1
B. 3—>1
C. 4—>2
D. 4—>3
Can someone answer 3’for me please?
g Which statement concerning the structure of the atom is correct? Protons and neutrons have most of the mass and occupy most of the volume of the atom. Electrons have most of the mass but occupy very little of the volume of the atom. Electrons have most of the mass and occupy most of the volume of the atom. Protons and neutrons have most of the mass but occupy very little of the volume of the atom.
Protons and neutrons have most of the mass but occupy very little of the volume of the atom.
The statement concerning the structure of the atom is correct is Protons and neutrons have most of the mass but occupy very little of the volume of the atom. Therefore, option D is correct.
What is an atom ?Each atom is made up of a nucleus and one or more electrons that are linked to it. One or more protons and a significant number of neutrons make up the nucleus. Only the most prevalent type of hydrogen is neutron-free. Atoms that are neutral or ionized make up every solid, liquid, gas, and form of plasma.
But when it comes to the name atom, we must travel back to 400 B.C. ancient Greece. The Greek word atomos, which meaning "uncuttable," was proposed by Democritus, a renowned philosopher. In the end, all matter could be reduced to distinct, tiny particles, or atomos, he said.
The smallest unit of matter that may be divided without producing electrically charged particles is the atom.
Thus, option D is correct.
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PLEASE HELP I WILL GIVE BRAINLIEST!!!!!
What is a main difference between a mixture and a pure substance?
OAmixture is only a liquid, but a pure substance can be in any state.
OAmixture looks the same throughout, but a pure substance does not.
OAmixture can vary in composition, but a pure substance has a set composition.
O Amixture can be made up of a single compound, but a pure substance cannot
Answer:
I think the answer is c!
Explanation:
Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule. hope this helps you!
Suppose you used 0.5 M NaOH to titrate your vinegar sample instead of 0.1 M. What effect does the concentration of base added have on the reliability of the results of your titration?
Answer: the reliability will be worse
Explanation:
Suppose we used 0.5 M NaOH to titrate our vinegar sample instead of 0.1 M.
Now by using 0.5M instead of 0.1M we are increasing the concentration of NaOH,
We know that the moles used = Volume x concnetration.
so for the same no of moles, if the concentration increases, the volume decreases.
Hence it will consume less NaOH.
now Since the volume decreases, the titration volume of less number will increase the % error.
Therefore the reliability will be worse.
The effect that the concentration of the added base has on the reliability of the results of the titration in question is; The reliability will be worse.
We are told that;
0.5 M NaOH is to be used to titrate a vinegar sample instead of 0.1 M.
Now, 0.5 M means a concentration of 0.5 and since it is higher than 0.1M, it means the concentration of NaOH will increase.
Formula for number of moles used is;
n = V × M
Where;
n is number of moles
V is volume
M is concentration
We can see that number of moles is directly proportional to the volume and concentration.
Thus, if the number of moles remains unchanged, as we have increased the concentration, it means that the volume will decrease.
Thus, lesser volume of NaOH will be used and as a result of this decrease in volume, there will be a greater possibility of error.
In conclusion, we can say that the reliability will be worse.
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Occurs when the membrane surrounds a large substance and engulfs it.
) Active Transport
O Diffusion
O Endocytosis
Exocytosis
Density = Mass
Volume
To find the density of a solid:
Find the mass of the block.
Find the volume of the block using (length x width x height)
Use the equation to find density.
#1 #2 #3 #4 #5 = (2x3x4) #1/#5
Block #
Mass (g)
Length (cm)
Width (cm)
Height (cm)
Volume
(cm3)
Density (g/cm3)
1
75
6
3
4
72
1.04
2
3
4
5
6
7
8
Follow up questions:
Which two blocks were made out of the same material?
How do you know?
Does a larger block always have a higher density?
Answer:
what is it all about???
The electron configuration for an element is 1s2 2s2 2p6 3s2 3p6. What is the atomic number of the element? *
A. 3
B. 11
C. 18
D. 22
Explanation:
Electronic configuration =
1s² 2s² 2p⁶ 3s² 3p⁶
Atomic number = 18Element = ArgonSymbol = ArGroup = 18period = 3Therefore,
Option C is correct✔
According to the electronic configuration, the atomic number of the element is 18.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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Question 8 (3 points) What is the formula for Silver (III) sulfide? O Ag2(SO4)3 O Ag3(SO4)2 Ag3S2 Ag2S3
The formula of Silver (III) Sulfide is Ag2S3.
Hope this helps. Please mark brainliest!
Which scenario is likely to result in the most diverse offspring?
1 point
Sexual reproduction between two individuals from different continents
Sexual reproduction between two individuals in the same population
Asexual reproduction by binary fission
Asexual reproduction by budding
Answer: i think it is binary fission
Explanation:
A 12.0% sucrose solution by mass has a density of 1.05 gem, what mass of sucrose is present in a 32.0-mL sample of this solution?
A) 0.126g
B) 3.66g
C) 4.03g
D) 3.84g
E) 280 g
Answer:
Option C. 4.03 g
Explanation:
Firstly we analyse data.
12 % by mass, is a sort of concentration. It indicates that in 100 g of SOLUTION, we have 12 g of SOLUTE.
Density is the data that indicates grams of solution in volume of solution.
We need to determine, the volume of solution for the concentration
Density = mass / volume
1.05 g/mL = 100 g / volume
Volume = 100 g / 1.05 g/mL → 95.24 mL
Therefore our 12 g of solute are contained in 95.24 mL
Let's finish this by a rule of three.
95.24 mL contain 12 g of sucrose
Our sample of 32 mL may contain ( 32 . 12) / 95.24 = 4.03 g
How many atoms are in 2.37 moles of Krypton
Answer:
1.43 × 10²⁴ atoms Kr
General Formulas and Concepts:
Chemistry - Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
2.37 mol Kr
Step 2: Convert
[tex]2.37 \ mol \ Kr(\frac{6.022 \cdot 10^{23} \ atoms \ Kr}{1 \ mol \ Kr} )[/tex] = 1.42721 × 10²⁴ atoms Kr
Step 3: Check
We are given 3 sig figs. Follow sig fig rules and round.
1.42721 × 10²⁴ atoms Kr ≈ 1.43 × 10²⁴ atoms Kr
Which model of the solar system is shown here?
Answer: C
Explanation: hope this helps
The model of the solar system that is shown here is:
C. Geometric model
Model for description of earth and other entites
Geometric model:In astronomy, the geocentric model is a superseded description of the Universe with Earth at the center. Under the geocentric model, the Sun, Moon, stars, and planets all orbit Earth.
Characteristics:
the Earth is the focal point of the universe and it is fixed,the planets, the Sun, and the stars spin around the Earth,the circle and the circle are "awesome" shapes, so all movements overhead ought to follow roundabout ways, which can be credited to objects being appended to circular shells.Thus, option C is correct.
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for the following equation to be bal
Answer:
What's the rest of the question
Explanation:
In a carbon dioxide molecule, a double covalent bond forms when the carbon atom shares what
pairs of valence electrons with each oxygen atom.
Answer:
2 pair of an electron
Explanation:
carbon having 6 valence electron 2 electron involved in covalent bonding so 4 electron means 2 pairs of an electron will left.
Middle school science help please. ill give brainliest
Answer:
It converts The liquid into a gas at the same temperature.
Explanation:
Answer:
it converts the liquid into gas at the same temperature
Explanation:
when heat is added to a liquid at boiling temperature it converts the liquid into gas at that same boiling temperature
please give brainliest
Please answer. Thank you
Answer:
Explanation:
what are tho anwser choices
Which is an example of a compound? * He3 or H2O or C
Answer:
H2O
Explanation:
There is more than one element
Based on the information in the table, which of the following arranges the bonds in order of decreasing
polarity?
Choose 1 answer:
H-S > Sn-Te > Si-F
Sn-Te > H-S > Si-F
Si-F>H-S > Sn-Te
Si-F > Sn-Te > H-S
Answer:
what grade so i can help
Explanation:
Answer:
I believe it’s Sn-Te > H-S > Si-F
Explanation:
How many atoms of carbon are present in the products?
6CO2+6H2O=C6H12O6+6O2
Answer:
2.41 * 10^24 atoms of carbon present in the products.
Explanation:
First, we need to find the moles of carbon in the products in order to find the number of atoms.
We see that in the chemical formula, carbon belongs to the compound known as glucose. To get the amount of moles of carbon, we need to divide my the amount of carbon within glucose (in grams) from the total amu ( or grams) of glucose to get the moles.
C6 = 72.066.
C6H12O6 = 180.156
72.066/180.156 = 0.4000199827 moles of Carbon within the Glucose compound
Now we will convert to atoms/molecules by multiplying the moles by avogadro's number..
0.4000199827 moles C * 6.022*[tex]10^{23}[/tex] = 2.408920336 *[tex]10^{24}[/tex] atoms of Carbon present in the products
*Note --> this can be estimated to 2.41 * [tex]10^{24}[/tex] atoms of Carbon
How many moles are in the 100,000g of CuSO4 • 5H2O ?
Answer:
try (107.87 amu)
Explanation:
What is the scale called that measures the strength of an acid or base in solution?
A the Color scale
B pH scale
C The litmus test
D The number scale
Answer:
The answer is B. pH scale
Answer:
pH scale
Explanation:
ph scale basically measures the acidity and basicity of the solution
Which of the following is not a required characteristic for a living organism?
A) reproduction
B) mobility
C) homeostasis
D) adaptation
Answer:
B
Explanation:
living things are not required to move
A 5.0 g sample of metal was heated from 10°C to 40. °C. It absorbed 43.7 J of energy as heat. What is the specific heat of this piece of metal?
Answer:
Balls
Explanation:
Cuz
How many joules are required to melt 250 grams of water
Answer:
i not sure but i searched it up and it said Q=104525J
Explanation:
Write the net ionic equation for Potassium chloride + sodium nitrate
I believe the answer is this:
KCl + NaNO3 --> KNO3 + NaCl.
Answer:
No reaction
Explanation:
KCl + NaNO3 --> KNO3 + NaCl
Since these substances are all aqueous (no precipitates or other phases involved), if you were to write the ionic equation and cross out spectators, they'd all cancel so there is no reaction.
Write the formula for diphosphorous pentoxide
Answer:
P4O10
Explanation: