Chemistry College

Determine the number of protons, neutrons, and electrons:

Answers

Answer 1

Answer:

Hey Mia! This is what I put for my answer.

Explanation:

I hope this helps and have a good day :)

Related Questions

Explain the effects distance and mass have on the gravitational pull of the planets.

Answers

Answer:

Gravity is normal...

Explanation:

Objects with more mass have more gravity. Gravity also gets weaker with distance. So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass. So, theoretically speaking planets move or get pulled due to their huge amount of mass.

Complete and balance the following reaction
hydrobromic acid plus aluminum hydroxide

Answers

Answer:

3 HBr + Al(OH)₃ ⇒ AlBr₃ + 3 H₂O

Explanation:

Let's consider the unbalanced equation for the reaction that takes place when hydrobromic acid reacts with aluminum hydroxide. This is a neutralization reaction, in which an acid reacts with a base to produce a salt and water.

HBr + Al(OH)₃ ⇒ AlBr₃ + H₂O

First, we will balance Br atoms by multiplying HBr by 3.

3 HBr + Al(OH)₃ ⇒ AlBr₃ + H₂O

Finally, we get the balanced equation by multiplying H₂O by 3.

3 HBr + Al(OH)₃ ⇒ AlBr₃ + 3 H₂O

how did Simard conduct her experiments

Answers

Answer:

Simard planted paper birch, fir, and cedar trees in a plot and then injected them with different radioactive isotope carbon dioxide gases and covered them with bags. She waited an hour, then checked the trees for radiation.

How many grams of sodium hydroxide are needed to completely react with 50.0 grams of H2SO4?

Answers

Answer:

48.0 grams

Explanation:

The products of this reaction are nitrogen gas and water. How many grams of sodium hydroxide (NaOH) are needed to completely react with 50.0 grams of sulfuric acid (H2SO4) to form sodium sulfate (Na2SO4) and water? 2NaOH + H2SO4 → Na2SO4 + 2H2O ; 48.0 grams of NaOH are needed.

51.020 grams of sodium hydroxide is needed to completely react with 50 grams of sulfuric acid according to stoichiometry.

What is stoichiometry?

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

The reaction between sodium hydroxide and sulfuric acid is as follows,

2 NaOH + H₂SO₄[tex]\rightarrow[/tex]Na₂SO₄+2 H₂O

From the reaction, it is clear that 2 oles of sodium hydroxide react with 1 mole of sulfuric acid to give products. According to molar mass concept,

100 g of sodium hydroxide gives 98 g of sulfuric acid

Therefore, 50 gram of sulfuric acid requires 50×100/98=51.020 g

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reativity of alkali metals increases down the group while reativity decreases down the group in helogens

Answers

Complete question is;

Chemical reactivity of alkali metals increases down the group while reactivity of halogens decreases down the group. Give reasons

Answer:

Explained below

Explanation:

Alkali metals exhibit reactivity due to their electropositivity. Now, for alkalis, their electro-positivity increases down their group. Since their reactivity increases with increase in electropositivity, it means their reactivity also increases down the group.

Whereas, the reactivity of halogens occurs as a result of their electronegativity. Now, electronegativity for halogens decreases down the group. Since their reactivity decreases with decrease in electronegativity, it means that their reactivity will also decrease down the group.

What is the volume of 1g of ice in cm3?

Answers

Answer:

What is the volume of 1g of ice in cm3?

Explanation:

If 1.23 g of chlorine gas dissolves in
0.95 L of water at 15.6 psi, at what
pressure (in psi) would you be able
to dissolve 1.89 g in the same
amount of water?

Answers

Answer:

24 PSI

Explanation:

The concept Henry's law is used here to determine the pressure at which 1.89 g of chlorine gas is dissolved in the same amount of water. The pressure is 24.0 psi.

What is Henry's law?

Henry's law states that at constant temperature the solubility of a gas in a liquid is directly proportional to the pressure of the gas in equilibrium with the solution. The solubility of a gas in a particular solvent is mainly expressed in terms of Henry's law.

The equation of Henry's law is given as:

c = KH . p

Here c is the solubility of the gas, p is the partial pressure and KH is the Henry's constant.

Here only the amount of chlorine gas to dissolve changes. For two different grams of chlorine gas, the equation is:

c ₁ /p ₁ = c ₂ / p ₂

1.23 / 15.6 = 1.89 / P₂

P₂ = 24.0 psi

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how to get a girlfrend at age 70

Answers

Be that playa boyyyyy

What is the volume of a 0.1 M HCl solution containing 1.46 moles of HCI?

Answers

n = cv
1.46 = 0.1 x v
v = 1.46/0.1
v = 14.6 (litres if it’s moles per litre)

10.7g of C2H2 --> g CO2

1. List down the steps to determine the grams (g) of CO2 produced from the reaction of 10.7g of C2H2.

Describe the steps in complete sentences

Answers

Answer:

http://www.khalidshadid.com/uploads/3/9/2/0/3920808/raymond_chang-chemistry_10th_edition.pdf

Explanation:

http://www.khalidshadid.com/uploads/3/9/2/0/3920808/raymond_chang-chemistry_10th_edition.pdf

PLEASE HELP ME!! DIMENSIONAL ANALYSIS
CHEMISTRY
DUE IN 5 MINS!!!

Answers

Answer:

12 mi/h

Explanation:

Step 1: Given data

Total distance (d): 6 kmTime elapsed (t): 19 min

Step 2: Convert "d" to miles

We will use the conversion factor 1 mi = 1.60934 km.

6 km × 1 mi/1.60934 km = 3.7 mi

Step 3: Convert "t" to hours

We will use the conversion factor 1 h = 60 min.

19 min × 1 h/60 min = 0.32 h

Step 4: Calculate the average speed of the runner (s)

The speed is equal to the quotient between the total distance and the time elapsed.

s = d/t

s = 3.7 mi/0.32 h = 12 mi/h

Would convection work if there were no
gravity? Why
or
why not

Answers

Answer:

Explanation:

Because gravity is necessary for density differences to arise, convection wouldn't happen in a zero-gravity environment such as space.

Answer:

Absolutely, convection can occur in the absence of gravity. Convection in general and “natural convection” are two different things. Convection is a mode of heat transfer that involves bulk fluid motion. So take your space ship somewhere with negligible gravitational fields and shoot yourself in the face with a water gun full of cold water. Have a great day!

Briefly explain why the atoms of Carbon and Nitrogen have the same mass of 14

Answers

Answer:

Explanation:

Atoms of an element with the same mass number make up an isotope of the element. Different isotopes of the same element cannot have the same mass number, but isotopes of different elements often do have the same mass number, e.g., carbon-14 (6 protons and 8 neutrons) and nitrogen-14 (7 protons and 7 neutrons).

Answer: NO I know sorry

Why is n-hexanol is not soluble in H2O

Answers

Answer:

Ethanol is soluble in water because it has a hydroxyl group which allows it to form hydrogen bonds with the water molecules. This is why hexanol is not soluble in water.

Sublimation occurs when moving from
1) G to H.
2) I to J.
3) J to I.
4) I to H.

Answers

I to H that should be your answer

What was the main purpose of the opportunity rover?

Answers

Answer:

Explanation:The major goals of the two rovers, according to NASA, were to determine whether life as we know it could ever have arisen on Mars (focusing particularly on searching for ancient water) and characterizing the climate and geology of

Answer:

The major goals of the two rovers, according to NASA, were to determine whether life as we know it could ever have arisen on Mars (focusing particularly on searching for ancient water) and characterizing the climate and geology of the planet

Please help ASAP need this as last question.

would the power generated by Hydro power Cover the requirements for the state of Mississippi.

Answers

While Mississippi has several dams, they are all non-powered, and there is no utility-scale hydroelectric generation in the state. Mississippi does not have a renewable portfolio standard requiring electricity suppliers to obtain a certain amount of their power from renewable energy sources.

How many moles are in 9.20x10^20 molecules of water (H2O)?
Please and thank you :)!!!

Answers

Answer:

1.53 * 10^-3 moles of H20

Explanation:

I see that you're using the factor-label method, so if you want to convert a number into another number, let's start with the first number.

We have 9.20 * 10^20 molecules of water.

6.02 * 10^23 particles or molecules of water is 1 mole

If we want moles, we can write it like this

9.20 * 10^20 molecules of H20 | 1 mole of H20

| 6.02 * 10^23 molecules of H20

= 1.53 * 10^-3 moles of H20

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Identify and describe the different forms of precipitation shown in the images.

Answers

Answer:

snow, hail, rain

Explanation:

precipitation is the transfer of water in any form from the atmosphere to the land or sea surface

Forms of Precipitation. It can be liquid or solid; the main precipitation types are rain, sleet, snow, ice pellets, hail, and drizzle.

Why are there different forms of precipitation?

There are different forms of precipitation based on atmospheric conditions. Warmer atmospheric conditions might result in rain, drizzle, or hail (if it's a thunderstorm). Colder atmospheric conditions might result in snow, sleet, freezing rain, or ice crystals.

What are the 4 main types of precipitation?

The four main types of precipitation are rain, snow, sleet, and hail. Rain is liquid precipitation that falls during many parts of the year. Hail is associated with thunderstorms and generally falls in warmer temperatures. Snow and sleet are frozen and generally fall in colder temperatures.

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CH3CH2CH2CH2CH3

Balanced chemical equation for this

Answers

Answer:

C5H12 + 8O2 --> 5CO2 + 6H2O

Explanation:

Complete question

Write a balanced chemical equation to represent the combustion of CH3CH2CH2CH2CH3

Solution

The given compound is pentane

C5H12

The empirical equation representing combustion of pentane is

C5H12 + O2 --> CO2 + H2O

We will first balance the carbon atoms

C5H12 + O2 --> 5CO2 + H2O

Now we will balance the Hydrogen molecule

C5H12 + O2 --> 5CO2 + 6H2O

Now we will balance the oxygen molecule

C5H12 + 8O2 --> 5CO2 + 6H2O

What causes Earth's major wind patterns? Radiant energy from the sun strikes Earth unevenly. The Earth is spinning The density of ocean water changed wind patterns The latitudes of different areas

Answers

A. Radiant energy from the sun strikes earth unevenly

I took the quiz and tried all of the other answers so

Radiant energy from the sun strikes Earth unevenly is the main cause of Earth's major wind patterns.

What causes Earth's major wind patterns?

The main cause of Earth's winds is uneven heating by the sun. This uneven heating causes changes of atmospheric pressure and winds blow from regions with high pressure to those with low pressure.

So we can conclude that Radiant energy from the sun strikes Earth unevenly is the main cause of Earth's major wind patterns.

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Where and how does respiration take place

Answers

Explanation:

Glucose and oxygen react together in cells to produce carbon dioxide and water and releases energy. The reaction is called aerobic respiration because oxygen from the air is needed for it to work. Energy is released in the reaction. The mitochondria , found in the cell cytoplasm, are where most respiration happens.

For the balanced equation shown below, what would be the limiting reagent if 93.9grams
of C2H3F were reacted with 254grams of O2?

4C2H3F + 1102 ---> 8C02 + 6H2O + 2F2

A. C2H3F
B. 02
C. CO2
D. F2

Answers

Answer: A. C2H3F

Explanation:

What do you think air would
look like if you could zoom in and see its
structure and composition

Answers

Answer:

clouds

Explanation:

which of these salts is more soluble? sodium chloride or calcium carbonate?

Answers

Answer:

Sodium Carbonate is more soluble.

Explanation:

chlorine take longer to dissolve

Answer:

Sodium Chloride

Explanation:

Sodium Chloride is salt and we can tell that salt is more soluble than calcium chloride as it is used for making cast for fractures

I never see anyone with this question

Answers

Answer:

i cant see the pic

Explanation:

no hablo ingles jajajajjajajajajabbbbbhuuuuuuu

Hey....Tell me

What is the molecular weight of carbon dioxide??

follow me....

Answers

Answer:

44 g/mol

Explanation:

An unknown organic compound containing carbon, hydrogen, and oxygen, is subjected to combustion analysis. When 3.498 g of the unknown compound is combusted, 7.950 g of CO2 and 3.255 g of H2O is formed. What is the molecular formula of the unknown compound if its molar mass is 174.27 g/mol?

Answers

Answer:

Molecular formula for the organic compound is: C₉H₁₈O₃

Explanation:

We determine the combustion reaction:

CₓHₓOₓ + O₂ → CO₂ + H₂O

We don't know the subscrip of the organic compound, that's why we put x.

Notice we have C in the compound and in CO₂. Let's find out the mass of C. 1 mol of CO₂ contains 1 mol of C

Then (7.950 g /44g/mol) of CO₂ may contain ?

(7.950 g /44g/mol) represents the moles of dioxide → 0.181 moles of C

These moles came from the mass of the organic compound, the 3.498 g.

So now, we can know the subscript for C.

If 3.498 g of the compound contain 0.181 moles of C

174.27 g of the compound may contain (174.27 . 0.181)/ 3.498 = 9

Let's do the same for the H.

1 mol of water contain 2 moles of H

(3.255 g /18 g/mol) of water, may contain ?

3.255 g /18 g/mol = 0.181 moles . 2 = 0.362 moles of H

These moles came from the mass of the organic compound, the 3.498 g.

Let's find out the subscript for H

If 3.498 g of the compound contain 0.362 moles of H

174.27 g of the compound may contain (174.27 . 0.362)/ 3.498 = 18

Organic compound is C₉H₁₈Oₓ. If the molar mass is 174.27 g we can easily determine the moles of O

12 g/mol . 9 + 1 g/mol . 18 + 16 g/mol . X = 174.27 g/mol

(174.27 g/mol - 12 g/mol . 9 - 1 g/mol . 18 ) / 16 = 3

Molecular formula for the organic compound is: C₉H₁₈O₃. Therefore the complete combustion reaction is:

C₉H₁₈O₃ + 12O₂ → 9CO₂ + 9H₂O

What are 3 ways in which you or a classmate can use the scientific method to explore how exercise impacts the body?

Answers

Answer:

You could test for energy levels or the amount of times you can do a specific excersice.

To prepare for a laboratory?

Answers

Answer:

You have to prepare for the lab (Materials, work, paper etc.)

Set up the lab know where the lab will be taking place

Read thru the experiment before doing the lab

Make a hypothesis

Write down notes, observations, measures anything important to help with the lab!

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