Chemistry College

In the context of a balanced chemical equation, a____is a number to the lower right of an element or ion within formula and it applies to____. A____is a number to the left of a formula and it applies to_____. Only_____should be added or changed when balancing chemical equations.

Answers

Answer 1

Answer:

Explanation:

The preceding chapter introduced the use of element symbols to represent individual atoms. When atoms gain or lose electrons to yield ions, or combine with other atoms to form molecules, their symbols are modified or combined to generate chemical formulas that appropriately represent these species. Extending this symbolism to represent both the identities and the relative quantities of substances undergoing a chemical (or physical) change involves writing and balancing a chemical equation. Consider as an example the reaction between one methane molecule (CH4) and two diatomic oxygen molecules (O2) to produce one carbon dioxide molecule (CO2) and two water molecules (H2O). The chemical equation representing this process is provided in the upper half of Figure 1, with space-filling molecular models shown in the lower half of the figure.

Related Questions

Help please I’ll mark as brainiliest

Answers

Answer:

         B             B

W      BW          BW        

W       BW          BW

Explanation:

Hope this helps

Quinine in a 1.664-g antimalarial tablet was dissolved in sufficient 0.10 M to give 500 mL of solution. A 15.00-mL aliquot was then diluted to 100.0 mL with the acid. The fluorescence intensity for the diluted sample at 347.5 nm provided a reading of 327 on an arbitrary scale. A standard 100 ppm quinine solution registered 180 when measured under conditions identical to those for the diluted sample. Calculate the mass of quinine in milligrams in the tablet.

Answers

Answer:

605.6mg of quinine

Explanation:

Based on Lambert-Beer's law, the intensity of an optical measurement is directely proportional to its concentration.

Unknown concentration gives a reading of 327

100 ppm gives 180 of intensity

The concentration of the diluted quinine tablet is:

327 * (100ppm / 180) = 181.67 ppm. The final dilution

The concentration of the first diluted solution is:

181.67 ppm * (100.0mL / 15mL) = 1211ppm

ppm could be defined as mass of solute (In this case of quinine) in mg per liter of solution. That is:

1211mg / L

As the tablet was diluted to 500mL = 0.5L, the mass of the quinine is:

0.5L * (1211mg / L) =

605.6mg of quinine

Water pollution has severely impacted animals and plants in New York's Hudson

Answers

Yeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeet

is pyramidal molecular geometry?

A. N2
B. H2O
C. NH3
D. CCL4

Answers

Answer:

[tex]\color{Blue}\huge\boxed{Question} [/tex]

Is pyramidal molecular geometry?

[tex]\color{Blue}\huge\boxed{Answer} [/tex]

B.H2O
it should be B.H2O!
goodluck please let me know if i’m wrong
Other Questions
what is opportunity??? BRAINLIEST, THANKS, AND 5/5 REVIEWSThe population pyramid for Japan is ___.a. expansiveb. stationaryc. constrictive Dilation of 2 about the origin Before we make measurements, let's make sure we understand the circuit. 1. Select all of the following that correctly describe what a volt meter and ammeter measure. Select all that apply: A volt meter measures the potential difference (or voltage) across a circuit element. A volt meter measures the potential difference (or voltage) passing through a circuit element. A ammeter measures the electric current passing through a circuit element. A ammeter measures the electric current across a circuit element. How does Thoreau support his claim in this excerpt?A. He uses reasoning, showing the logical consequences of supporting a cause that is wrong.B. He tells an anecdote about a townsman who refused to march to Mexico and what happened to him.C. He shares statistics about casualties in the Mexican-American War.D. He uses measurable evidence about the number of people who have refused to join the US Army. somebody help me please Why do astronomers use frequencies other than the visible ones when they areinvestigating the universe? Claim: Having a school library is a great benefit to students because it will help them to learn. What kind of evidence would support this claim? Check all that apply. a quotation from a student who has books at home an example of a student who is not able to get to a public library a detail that includes teacher support for a school library a reference to an article about public library funding EVERYONE HELP SOS SOS I NEED YOUR HELP THIS IS AN EMERGENCY SOSSOSSOSHow is X - 5 mathematically different from x > 5? INCLUDE A REAL LIFE EXAMPLE IN YOUR RESPONSE AND YOU WILL RECEIVE A BONUS POINT AND MARKED BRAINLYEST Which equation represents a line which is parallel to the line y = -5x 7? In one to two sentences, identify the bold words as an independent clause, dependent clause, or phrase, and explain their functions within the sentence what is the opposite meaning of taunt [tex]1 3/12-2/3=[/tex] AssignmentsCalculate the circumference and area of the circle shown below. Record your answers,with units, on the lines provided Use 3.14 for pi.CalendarFiles5 inC = = 2 what was an effect of the great railroad and haymarket riot on the labor movement? What differences or similarities were there in tempo, or speed, of the music? Which of the following words has the same meaning as commerce? A. business B. religion C. village D. government What best describes Dean Kamen's early inventions?Sound and light displays for theaters and showsiPhone AppsO Life-saving medicinesSmall household appliances Arc CD is [tex]\frac{2}{3}[/tex] of the circumference of a circle. What is the radian measure of the central angle?a.) [tex]\frac{2\pi}{3}[/tex]b.) [tex]\frac{3\pi}{4[/tex]c.) [tex]\frac{4\pi }{3}[/tex]d.) [tex]\frac{3\pi}{2}[/tex] HELP! WILL MARK AS BRAINLIEST (MATHEMATICS FORM 1 // BASIC ALGEBRA) pls help me answer these 4 question TYSM!!!