How many electrons must nitrogen gain to become like it’s closest noble gas, Neon?
Answer:
3
Explanation:
A solution was diluted 1/40, and the final concentration was 20%. What was the original concentration?
The original concentration : 800%
Further explanationGiven
Diluted 1/40
Final concentration 20%
Required
The original concentration
Solution
Dilution is the process of adding solvent to get a more dilute solution.
The moles(n) before and after dilution are the same.
Can be formulated :
n₁ = n₂
M₁.V₁ = M₂.V₂
diluted 1/40(dilution factor)⇒ V₁/V₂=1/40⇒V₂/V₁=40
M₂ = 0.2(20%)
Input the value for M₁ :
M₁=M₂ x (V₂/V₁)
M₁ = 0.2 x 40
M₂ = 8(800%)
=
Will mark brainliest!!!! 15 pts!!!!Please solve these equations
How many liters are in 7.41 x 1026 atoms of helium (He) at STP?
Answer:
Explanation: Avogadro number,N, = 6.02214076*10^23per mole —> 22.71L
—>( 7.41*10^26/N)*22.71 = 22.79*10^3 = 22,790L
Sulfur dioxide (SO2) is an unwelcome result
of burning soft coal in power plants. Some
of the SO2 ends up as sulfuric acid in acid
precipitation. The net reaction is
2 SO2(g) + O2(g) + 2 H2O(l) —— 2 H2SO4(l)
What mass in grams of SO2 is needed to
react with 1771 g of O2?
Answer in units of g.
Answer:
I believe it is 1771 divided by 4
Explanation:
What is the length of an average solar cycle? A. 5 years B. 11 years C. 22 years D. 10 years
What are the names of the compounds containing silver?
Show the compound formula and their names. (WRITE CLEARLY AND NEATLY OR THE QUESTION WILL BE CONSIDERED WRONG)
Answer:
the silver compounds include:
silver chloride agcl ,
silver bromide agbr ,
and silver iodide agi.
Classify each of the observed changes according to whether or not they are likely to represent evidence that a chemical reaction is occurring when performing an experiment.
May be evidence of a chemical reaction Not evidence of a chemical reaction
a solution color becoming less intense
due to dilution
bubbles (sas formation) changes in color
precipitation
explosion or fire
Answer Bank
a solid liquifying change in temperature solution colors mixing
Answer:
a solution color becoming less intense due to dilution- is not an evidence of a chemical reaction
bubbles (gas formation) - evidence of a chemical reaction
explosion or fire - evidence of a chemical reaction
changes in color- evidence of a chemical reaction
precipitation- evidence of a chemical reaction
changes in temperature - evidence of a chemical reaction
a solid liquifying - is not an evidence of a chemical reaction
solution colors mixing - is not an evidence of a chemical reaction
Explanation:
A chemical change is not easily reversible and yields new substances. It is often accompanied by a loss or gain of heat.
In the answer section, i have shown some evidences that lead us to conclude that a chemical reaction has taken place. The occurrence of a chemical change often goes with the formation of new substances as earlier stated and any of these signs may accompany the process.
For instance, when a metal is dropped in dilute acid solution, bubble of hydrogen gas indicates that a chemical reaction has taken place.
Uranium (VIII) Sulfide formula
Answer:
US₂
Explanation:
Uranium sulfide (US₂)
Uranium atomic symbol = U
Sulfur atomic symbol = S
Uranium valency = +4
Sulfur valency = -2
So;
Uranium sulfide (US₂)
Based on the number of valence electrons indicated by its location in the periodic table ,which elements behavior would you predict to be closest to that of potassium (k)
Answer:
Na sodium or Rb rubidium
Explanation:
Because Na is present in first group all members of group 1 have 1 electron in valence shell and show similar properties.
How much volume (in cm3) is gained by a person who gains 12.3 lb of pure fat?
Answer:
So we are given with the mass while we are asked for the amount of volume. So this means, we must need an information on the density. From literature, the density of human fat is 0.918 g/cm³. Convert grams to lb by the conversion that 1,000 g = 2.2 lbs.
Density = 0.918 g/cm³ * (2.2 lbs/1,000 g) = 0.0020196 lb/cm³
Volume = Mass/Density = 12.2 lb / 0.0020196 lb/cm³
Volume = 6,040.8 cm³
Which of the following does NOT determine local weather patterns?
Answer:
do you have a picture of the choices?
2 NaOH (s) + CO2(g) → Na2CO3 (s) + H20 (I) How many grams of water can be produced with 1.85 moles of NaOH
Explanation:
Mole ratio of NaOH to H2O = 2 : 1
Moles of H2O = 1.85mol * (1/2) = 0.925mol.
Mass of H2O = 0.925mol * (18g/mol) = 16.65g.
Answer:
16.65 grams of water can be produced with 1.85 moles of NaOH.
Explanation:
Mole ratio of NaOH to H2O = 2 : 1
Number of moles of water = (1/2)×1.85= 0.925 moles
Molar mass of water (H2O) = 18g/mol
Mass of the right water = 18g/mol×0.925 mol=16.65 grams
A .......... notifies you that danger is present if the directions are not followed.
•A . Warning
•B.Hazard
•C. Safety
•D. Danger
Answer:
A. Warning
Explanation:
Out of all said choices, the best choice would be warning since it would fit the sentence the most.
"A Warning notifies you that danger is present." compared to:
"A Hazard notifies you that danger is present."
"A Safety notifies you that danger is present."
"A Danger notifies you that danger is present."
Isopropanol burns in oxygen to yield carbon dioxide, water, and heat. Which word equation best represents this chemical reaction?
isopropanol Right arrow. carbon dioxide + water + heat
isopropanol Right arrow. carbon dioxide + water + oxygen
isopropanol + oxygen Right arrow. carbon dioxide + water + heat
isopropanol + oxygen + heat Right arrow. carbon dioxide + water
Answer:
isopropanol + oxygen Right arrow. carbon dioxide + water + heat
Explanation:
Word equation:
isopropanol + oxygen → carbon dioxide + water + heat
Chemical equation:
2C₃H₇OH + 9O₂ → 6CO₂ + 8H₂O + Heat
The given reaction is combustion of isopropanol. Isopropanol burn in the presence of oxygen and produced carbon dioxide and water. Heat is also produced in this reaction.
The given reaction also follow the law of conservation of mass. There are equal number of moles of each element on both side of reaction equation thus mass remain conserved.
isopropanol + oxygen Right arrow. carbon dioxide + water + heat
The following information should be considered:
Word equation:
isopropanol + oxygen → carbon dioxide + water + heat
Chemical equation:
[tex]2C_3H_7OH + 9O_2 \rightarrow 6CO_2 + 8H_2O + Heat[/tex]
The given reaction is combustion of isopropanol. Isopropanol should be burn with the presence of oxygen and generated carbon dioxide and water. Heat is also generated in this reaction. The given reaction also follows the law of conservation of mass
Learn more; https://brainly.com/question/1691136?referrer=searchResults
differentiate between normal publication window and the story editor window in desktop publishing
The main differentiation between given windows is that in normal publication window we can edit the document after generation also and the story editor window in desktop publishing we can not able to edit after generation.
What is windows?Windows in the computer world is a part of the graphical user interface (GUI), which is a separate viewing area on the display of monitor where they allow multiple viewing area.
In the normal publication window, word processing software like Microsoft Word, Pages, Writer and WordPerfect comes which is used to create any text document like resume, report, thesis, etc. which can be manipulate after the generation also.The story editor window in desktop publishing is used to create page layouts of any documents for publication in print or online.Hence, in the above paragraph differentiation is given.
To know more about windows, visit the below link:
https://brainly.com/question/25554117
The density of mercury is 13.6 g/cm'. How many quarts does 83.0 g of Hg occupy? (1 L=1.06 qt)
Answer:
0.0064 qt
Explanation:
Given data:
Density of mercury = 13.6 g/cm³
Mass of mercury = 83.0 g
How many quarts mercury have = ?
Solution:
First of all we will calculate the volume in cm³.
d = m/v
13.6 g/cm³ = 83.0 g / volume
Volume = 83.0 g / 13.6 g/cm³
Volume = 6.1 cm³
cm³ to L:
6.1 cm³ × 1 L / 1000 cm³
0.0061 L
In quarts:
1 L = 1.06 qt
0.0061 L × 1.06 qt / 1 L
0.0064 qt
How are electricity and magnetism related?
Electricity and magnetism are not related.
Moving magnets can make electrical currents.
Electricity can create a magnetic field.
Protons and electrons are repelled by magnets.
NEED HELP NOW
Answer:How are electricity and magnetism related?
Moving magnets can make electrical currents.
Electricity and magnetism are not related.
Protons and electrons are repelled by magnets.How are electricity and magnetism related?
Moving magnets can make electrical currents.
Electricity and magnetism are not related.
Protons and electrons are repelled by magnets.
Explanation:
The table below shows properties of two compounds at standard pressure. Which statement classifies the two compounds? 1)Both compounds are ionic, 2)Both compounds are molecular, 3) Compound 1 is ionic, and compound 2 is molecular, 4)Compound 1 is molecular, and compound is ionic
Answer:
answer of this question is option. 3. compound 1 is ionic ,and 2 is molecular
Compound 1 is ionic and compound 2 is molecular. The correct option is 3) Compound 1 is ionic, and compound 2 is molecular
From the question,
We are to classify the compounds according to the information provided in the table
First,
We will list the properties of ionic and molecular compounds
Properties of ionic compounds
The exist as solid at room temperature. They generally have high melting and boiling temperatures. They are good electrical conductors when molten or in solution.Properties of molecular compounds
They can exist as solid, liquid or gas.They generally have low melting and boiling temperatures. They are poor electrical conductors.In the given table,
Compound 1 has high melting and boiling points, and it is a good electrical conductor. Therefore, compound 1 is ionic
Compound 2 has low melting and boiling points, and it is a poor electrical conductor. Therefore, compound 2 is molecular
Hence, Compound 1 is ionic and compound 2 is molecular. The correct option is 3) Compound 1 is ionic, and compound 2 is molecular
Learn more on properties of ionic and molecular compounds here: https://brainly.com/question/13878434
a. Use the balanced equation C3H8 + 5O2 -> 3CO2 + 4H2O to answer the following questions
i. How many moles of CO2 are produced from 5 moles 02? (1 point)
ii. How many grams of CO2 are produced from 5 moles O2? (2 points)
iii how many grams of CO2 are produced from 128.00g O2? (2 points)
Answer:
i. 3 moles.
ii. 132.03 grams.
iii. 105.6 grams.
Explanation:
Hello!
In this case, given the balanced chemical reaction, we can proceed as follows:
i. By starting with 5 moles of oxygen, via the 5:3 mole ratio we compute the produced moles of CO2:
[tex]n_{CO_2}=5molO_2*\frac{3molCO_2}{5molO_2} =3molCO_2[/tex]
ii. Now, since we have previously computed the moles of CO2 from the same moles of oxygen, by using its molar mass (44.02 g/mol), we obtain:
[tex]m_{CO_2}=3molCO_2*\frac{44.01gCO_2}{1molCO_2} =132.03gCO_2[/tex]
iii. Now, we need to combine the previously used two proportional factors for the calculation of the mass of CO2 from 128.00 grams of oxygen (molar mass 32.00 g/mol):
[tex]m_{CO_2}=128.00gO_2*\frac{1molO_2}{32.00gCO_2}*\frac{3molCO_2}{5molO_2}*\frac{44.01gCO_2}{1molCO_2}\\\\m_{CO_2}=105.6gCO_2[/tex]
Best regards!
How do you know when to put a positive or negative exponent?
Answer:
If a negative number is raised to an even power, the result will be positive. If a negative number is raised to an odd power, the result will be negative. The negative number must be enclosed by parentheses to have the exponent apply to the negative term.
Explanation:
PLEASE HELP PLEASE LLEASE HELP, WILL MARK BRAINLIEST!!!
Which of the following elements will NOT reach an octet when in a bond?
Answer:
Hydrogen
Explanation:
which mineral is composed of calcium and fluorine?
Answer:
Fluorite
What is Fluorite? Fluorite is an important industrial mineral composed of calcium and fluorine (CaF2). It is used in a wide variety of chemical, metallurgical, and ceramic processes
a sample of solid is decomposed and found to contain 6.52g of potassium, 4.34 g of chromium and 5.34 of oxygen, what is the empirical formula of the compound? help asap
Answer:
K₂CrO₅
Explanation:
The empirical formula is the simplest formula of a compound. To find the empirical formula, we follow the procedure below:
Elements Potassium Chromium Oxygen
Mass 6.52 4.34 5.34
Molar mass 39 60 16
Number of moles 6.52/39 4.34/60 5.34/16
0.167 0.072 0.333
Divide through by
the smallest 0.167/0.072 0.072/0.072 0.333/0.072
2.3 1 4.6
2 1 5
Empirical formula K₂CrO₅
atom ,molecule, proton neutron electron, elements/compounds from SMALLEST to the BIGGEST.
Answer:
Electron,Protons/Neutrons,Atom,Molecule
Explanation:
HELPPPPPPPPPPPPPPPPPP
Answer:
*helps and doesnt get deleted*
Explanation:
Which of these can be found in a plant cell, but not in an animal cell?
Answer:
Hey!
Explanation:
I dont know the answers but Cell walls and Cloroplasts are only in plant cells. I hope this helps!
17. Find the average atomic mass unit of silicon given the following isotopes and
abundances: Silicon-28, Silicon-29, Silicon-30 with masses of 27.977, 28.976,
29.974, respectively. The percent abundance of the silicon isotopes is 92.2%, 4.7%
and 3.1%, respectively. Periodic table and it’s trends
The average atomic mass unit of Silicon : 28.0774
Further explanationGiven
Isotopes of Si(Silicon-28, Silicon-29, Silicon-30)
Required
The average atomic mass
Solution
Isotopes are elements that have the same Atomic Number (Proton)
Atomic mass is the average atomic mass of all its isotopes
Avg. atomic mass = %mass.isotopes 1 + %mass.isotopes 2...etc
Input the values :
Avg atomic mass = (0.922 x 27.977) + (0.047 x 28.976) + (0.031 x 29.974)
Avg atomic mass = 28.0774
6. Three of these terms belong together. Which one doesn't belong?
A) nucleus
B) cytoplasm
C) cell wall
D) cell membrane
Explain why the one you chose doesn't belong with the other three?
Answer:
i am 50/50 at the memoent but i have a feeling it is the cytoplasm as it isnt a cell like the others. Hope this helps :(
Explanation:
275L/sec to mL/hour with work
