Chemistry College

Can u please help me name which one it is

Answers

Answer 1

i think it’s D.
sorry if it’s wrong

Answer 2

Answer:

I think it is C

Explanation:

Related Questions

Which level is made up of organisms that break down dead organisms?

Answers

Answer:

Explanation:

decomposers

pond water with microscopic organisms inside mixture or pure substance

Answers

Answer:

it's mixture

Explanation:

since pond is composed of not only microbes and also more aqatic animals so I think pond become mixture but not pure substance am I right or not...

Instruction
Active
TRY IT Writing Measurements in Scientific Notation
Choose the scientific notation that best represents the standard notation given.
6,840,000,000 m
68.4 x 108 m
6.84 x 108 m
6.84 x 10-9 m
6.84 x 109 m
0.000000000143 g
-1.43 x 1010 g
1.43 x 10-10 g
14.3 x 1010 g
14.3 x 10-10 g
COMPLETE
DONE

Answers

No se pero quiero puntos porque estoy en examen, perdonnn =(

Answer:

D & B

Explanation:

just did it

Assume the copper was not thoroughly dried. How will the following calculations be affected?

The calculated mass of copper will be too low or too high?
The calculated moles of copper will be too low or too high?
The calculated mass of chlorine will be too low or too high?
The calculated moles of chlorine will be too low or too high?

Answers

The answer should be A, I could be wrong though. Water seeps into any open crack or pore, making something denser, therefore could cause more (or less) mass.

Name the functional group in the
following molecule:
HSCH2CH3
A. alkane
B. amide
C. thiol
D. alkyl halide

Answers

Answer:

C. thiol

Explanation:

Answer:

it's C thiol I just took the test

hope this helps

have a good day :)

Explanation:

How many moles of KBr are present in 1000 ml of a 0.02 M KBr solution?

1. .00002
2. 20
3. 50000
4. .02
5. 50

Answers

Answer:

4. .02

Explanation:

Hello there!

In this case, since the molarity of a solution is defined as the moles of the solute divided by the volume of the solution, we can see we are given the molarity and volume and are asked to compute moles; thus, we can solve as shown below:

[tex]M=\frac{n}{V}\\\\n=M*V[/tex]

Whereas the volume must be in liters (1 L in this case); in such a way we can plug in the volume and molarity to obtain:

[tex]n=0.02mol/L*1L\\\\n=0.02mol[/tex]

Therefore, the answer is 4. .02 .

Best regards!

Which unit is NOT correctly paired?
O Liters : Volume
O Formula Mass : Count
O Grams: Mass
O Molecules : Mass

Answers

Answer:

Molecules : Mass

Explanation:

The first three answer choices correctly pair a unit with what it measures. Molecules are not used to measure mass; grams are.

Please someone help me with this!!

Answers

You’re answer would be A, when you open a parachute it captures air and shoots you upwards for a couple seconds because of how fast it slows the weight down.

Name the process that happens when a liquid turns into a gas.

Answers

evaporation is when liquid turns into gas

A falling ball looses its shape and bounces off the ground because it has...Immersive Reader

Kinetic energy

Potential energy

Elastic energy

Thermal energy

Answers

Potential energy or Kinetic energy

What information does the percent composition of an atom in a molecule
give?

Answers

Answer:

percent composition tells that by mass

molar mass of Mg(CO3)

Answers

Answer:

[tex]\boxed {\boxed {\sf 84.313 \ g/mol}}[/tex]

Explanation:

The molar mass is the mass per mole of an element or substance. The values for atomic mass on the Periodic Table are used as the molar mass. Look up the molar masses for the elements in the formula.

Mg: 24.305 g/molC: 12.011 g/molO: 15.999 g/mol

Analyze the formula. Magnesium and carbon have no subscript, so there is only one atom of each. Oxygen has a subscript of 3, so there are 3 atoms and the mass has to be multiplied by 3.

MgCO₃= 24.305 + 12.011+ 3(15.999) MgCO₃= 24.305+12.011+47.997=84.313 g/mol

The molar mass of magnesium carbonate is 84.313 grams per mole.

During a hurricane, what effect can the ocean have on the beach?

Answers

As the hurricane moves toward shore, the underwater tumult can cause shifting sands and muddy shallow waters, blocking the essential sunlight on which corals and other sea creatures rely. (Brainliest please)

Calculate the percent composition (out of 100) by weight of potassium in potassium carbonate decahydrate.

Answers

Answer:

12.26%

Explanation:

MM K = 39.1 g/mol

MM K2CO3 . 10H2O = 2x39.1 + 12.01 + 3 x 15.99 + 10 x 18.02= 318.38 g/mol

% by weight = (MM K/MM K2CO3.10H2O ) x 100= (39.1/318.8) x 100=12.26 %

The percent composition by weight of potassium in potassium carbonate decahydrate is 13.98%

Let's represent the chemical formula of the compound as follows;

potassium carbonate decahydrate = CH₂0KO₁₃

The molecular mass of the compound can be calculated as follows:

Molecular mass of CH₂₀KO₁₃molecular mass = 12 + 20 + 39 + (16×13) = 279 g/mol

mass of potassium = 39 g

Therefore,

% mass of potassium = 39 / 279 × 100

% mass of potassium = 3900 / 279

% mass of potassium = 13.9784946237

% mass of potassium = 13.98 %

learn more on percentage composition here: https://brainly.com/question/3905173

How many moles are 9.9 * 1024 molecules of methane?

Answers

There would be 0.79 moles

Limiting Reactant
12.0 grams of sodium reacts with 5.00 grams of chlorine. What mass of sodium
chloride could be produced?
Nas) +
Cl2(g) →
NaCls)
(1)
(2)
Identify the limiting reactant.
Determine the amount of sodium chloride produced.

Answers

Answer:

(1) Cl₂ is the limiting reactant.

(2) 8.18 g

Explanation:

2Na(s) + Cl₂(g) → 2NaCl(s)

First we convert the given masses of reactants into moles, using their respective molar masses:

Na ⇒ 12.0 g ÷ 23 g/mol = 0.522 mol NaCl₂ ⇒ 5.00 g ÷ 70.9 g/mol = 0.070 mol Cl₂

0.070 moles of Cl₂ would react completely with (2 * 0.070) 0.14 moles of Na. There are more Na moles than that, so Na is the reactant in excess while Cl₂ is the limiting reactant.

Then we calculate how many moles of NaCl are formed, using the limiting reactant:

0.070 mol Cl₂ * [tex]\frac{2molNaCl}{1molCl_2}[/tex] = 0.14 mol NaCl

Finally we convert NaCl moles into grams:

0.14 mol NaCl * 58.44 g/mol = 8.18 g

What atom has the largest atomic radius barium calcium magnesium radium

Answers

Answer:

Radium

Explanation:

It has the highest atomic number so it would have more shells, making it larger than the others.

What are the dependent and independent variables? (Picture^^)

Answers

Answer:

X axis shows the independent and Y axis shows the dependent.

Explanation:

As the independent variable is always plotted on the X-axis of the graph the Y-axis shows the dependent variable that is affected by the X variables Time is an independent variable and is always shown along the X-axis. Such as the image showed tells about the data of N2O biofuel emissions from 2009-10. Thus this will be plotted along the X-axis and Y-axis will show the amount of nitrogen fertilizer applied.

When a liquid is insoluble in another liquid, the liquids are said to be?

Answers

Answer:

immiscible

Explanation:

What is thrust force

Answers

Hopes this helps:

Answer:

The force that moves a plane forward through the air. Thrust is created by a propeller or a jet engine. An aircraft in straight and level flight is acted upon by four forces: lift, gravity, thrust, and drag. The opposing forces balance each other; lift equals gravity and thrust equals drag.

What is the correct shape and polarity of a water molecule

Answers

Answer:

Explanation:

because both H's should be positive and O is supposed to be negative.

2 CH3OH + 3 02 2 CO2 + 4H2O
What is the mass of oxygen (O2) that is required to produce 579 g of carbon dioxide (CO2)?
. Your answer should have three significant figures.

Answers

Answer:

632 g

Explanation:

2CH₃OH + 3O₂ → 2CO₂ + 4H₂O

First we convert 579 g of CO₂ into moles, using its molar mass:

579 g CO₂ ÷ 44 g/mol = 13.16 mol CO₂

Then we convert CO₂ moles into O₂ moles, using the stoichiometric coefficients:

13.16 mol CO₂ * [tex]\frac{3molO_2}{2molCO_2}[/tex] = 19.74 mol O₂

Finally we convert O₂ moles into grams, using its molar mass:

19.74 mol O₂ * 32 g/mol = 632 g

hi, if your looking for extra points (50+) and brainiest here is ur chance, answer this question correctly plz

Answers

Answer:

Answer choice 'C'

Explanation:

As the ball slows after kicking generates maximum Kinetic Energy, the ball slows due to its Kinetic Energy being transferred to surroundings because of atmospheric and surface friction until it stops in a state of static equilibrium.

either c or a
sorry if im wrong, but im sure its either one.

Who tryna do these 3 assignments on wizer for me

Answers

Can you be more specific please

Sam and Jane have been investigating the amount of copper sulphate that can be dissolved in water at different temperatures .They added copper sulphate till it could not be dissolved any further and also measured the mass of copper. The results are below. What conclusions can you make from results?

Answers

Answer:

This question is so confusing, I'm sorry

what is a 7 letter word that starts with f: Ancient plants and animals formed into rocks.

Answers

Answer:

Fossils?

Explanation:

12
"C
What is the number of protons in this carbon atom?
ÖA 12
OB. 6
Ос.
18
OD. 24
what is the answer

Answers

Answer:

Explanation:

the number of protons never changes even if the atomic mass changes

How many formula units make up 10.2 g of magnesium chloride (MgCl2)?

Answers

Answer:

6.46×10²² formula units

Explanation:

From the question given above, the following data were obtained:

Mass of MgCl₂ = 10.2 g

Number of formula units =?

From Avogadro's hypothesis,

1 mole of MgCl₂ = 6.02×10²³ formula units

But,

1 mole of MgCl₂ = 24 + (35.5×2) = 24 + 71 = 95 g

Thus, we can say:

95 g of MgCl₂ = 6.02×10²³ formula units

Finally, we shall determine the formula units in 10.2 g MgCl₂. This can be obtained as follow:

95 g of MgCl₂ = 6.02×10²³ formula units

Therefore,

10.2 g of MgCl₂ = (10.2 × 6.02×10²³) / 95

10.2 g of MgCl₂ = 6.46×10²² formula units

Thus, 10.2 g of MgCl₂ contains 6.46×10²² formula units

Which pieces of information do you need to locate a particular star on a star

Answers

Answer:

You need a telescope and a pear of eyes

Explanation:

Ok so this is my opinion you will need a telescope and you will also need it to be night and need eyes of course!

HELPPP PLZZ

During lunch each day, Alex and Hailey have been noticing the trashcans around the lunchroom are filling rather quickly with cans and bottles. They decide a recycling program would be beneficial for their school and the environment, so they brainstorm ways to get the program started. Before discussing their idea with the principal, they need to decide which of their plans would best solve the problem. Which of their ideas would best solve the problem with the least amount of inconvenience (disturbance) for everyone involved? A) Ask volunteers to separate recyclable materials from the trash. B) Remove all vending machines that sell plastic bottles or aluminum cans. C) Get a petition started to build a recycling center close to the school. D) Place plastic and metal recycling bins next to each lunchroom trash can

Answers

Answer:

Explanation:

i think it is C but idek but to me it sounds like the best answers but tell me if im wrong pls give me feedback

The ideas that would best solve the problem with the least amount of inconvenience is to place plastic and metal recycling bins next to each lunchroom trash can.

What is recycling?

The term recycling has to do with the reuse of a material after it has passed through certain processes. The idea of recycling is highly beneficial to the environment.

Thus, the ideas that would best solve the problem with the least amount of inconvenience (disturbance) for everyone involved is to place plastic and metal recycling bins next to each lunchroom trash can.

Learn more about recycling:https://brainly.com/question/11861824

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