What is the empirical formula of CoH1803? (4 points)

-O CH30
-C₂H50
-C₂H₂O
-O C₂H5O5

Answer:

880.5

Explanation:

Express the result of adding 856.6g and 23.86g to the correct number of significant figures.

856.6 +23.86  = 856.6 + 23.9 = 880.5

The result of adding 856.6 g and 23.86 g after rounding off to correct significant figures is 856.6 + 23.9=880.5.

Significant figures are used for establishment  of a number which is presented in the form of digits. These digits give a meaningful representation  to the numbers.

The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:

1)All non-zero digits are significant .

2)All zeroes which occur between non-zero digits are significant.

3)All zeroes to the left and right of  a non-zero digit are not significant.

4) All zeroes on right  of decimal are significant if a non-zero number follows them.

5)All zeroes on right side of non-zero digit are significant.

Learn more about significant figures,here:

https://brainly.com/question/29153641

#SPJ2

Answer:

385 cm^3

Explanation:

375cm3 of a gas has a pressure of 770 mm Hg, find it Volume if the pressure is reduced to 750 mm Hg

​if we reduce the pressure, the volume increase since since PV is constant

so the new volume = 0.375 cm^3 X 770/750 = 385 cm^3

63

Answer:

The answer is A and B

Explanation:

Answer:

one Sodium (Na) atom, two oxygen (O) atoms, two carbon (C) atoms, and three hydrogens (H) atoms

Explanation:

Answer:

First option

Explanation:

The option that says CH3CH2CH2CH3 is the correct option (I hope that I am right because the order of the answers is not very clear :/)

Answer:approximately 5.627 × 1019 milliliters

Explanation:

Answer:

the answer is D

Answer:

Refer to the attachments!!

Explanation:

The answer to the question is 14 no cap

Answer:

using Charles law

v1/t1= v2/ t2

Explanation:

875/t1=955/56+273

t1= 329* 875/955

t1= 302.82k

The initial temperature of the hot air balloon can be calculated from Charles's law. The initial temperature of the balloon was, 51.3 °C.

According Charles's law, at constant pressure, the temperature and volume of a gas is in direct proportionality. Thus volume increases with an increase in temperature. Therefore V/T = a constant.

Let V₁ and T₁ be the initial volume and initial temperature and V₂ and T₂ be the final volume and temperature respectively. Thus we can write the relation as:

V₁ /T₁  = V₂/T₂ .

Given that the initial and final volume are 875 L and 955 L respectively. The final temperature is 56 °C. Thus the initial temperature is calculated as :

T₁ = V₁T₂/V₂

   = (875 L × 56 °C )/955 L

   = 51.3 °C.

Hence, the initial temperature of the hot air balloon was 51.3 °C.

To find more on Charles's law, refer here:

https://brainly.com/question/16927784

#SPJ5

Answer:

The bowling ball has kinetic energy as it moves toward the pins.

Explanation:

Answer:

Most of it is transferred to the pins, but some of it is changed into heat and sound energy.

Explanation:

study island

Answer:

barium chloride (BaCl2) is added to sodium carbonate (Na2CO3). The result is a white precipitate.

Explanation:

Answer:

For the reaction N2 + 3H2 2NH3 , the equilibrium expression may be written as K [ NH3 ]^2/ [ N2 ] [ H2 ]^3 .

Explanation:

Answer:

s K [ NH3 ]^2/ [ N2 ] [ H2 ]^3 .

Explanation:

because I know -_-

Answer:

125°C/m

Explanation:

The difference in temperature will be:

35 - 10 = 25

The outer duct surface is heated 25°C by the air from 10°C to 35°C;

This heat gain is simply divided by 0.2m to get heat gain per unit length:

25/0.2 = 125

125°C/m

If you're American, this will be °F I believe, so the answer will be:

125°F/m

Answer:

cpd 2

Explanation:

aldehyde is such a cpd which contains an alkyle gp with the formula R-CH=O

Functional group can be interconverted into each other by the means of suitable reagent. Functional group are responsible for the chemical and physical properties of a compound. Therefore the correct option is option 2 that is having group  R-CHO.

A group of atoms forming a component of a molecule that accounts for a particular function or chemical behavior is called a functional group. There are so many functional group in organic chemistry.

The list of functional groups with their corresponding formulas can be given as

Carboxylic group COOH

Alcoholic group OH

Ammine group NH₂

Ketonic group R-CO_R

Aldehydic group R-CHO

Thiol group R-S-H

Cyanide group -CN

Therefore the correct option is option 2 that is having group  R-CHO.

To know more about functional group, here:

https://brainly.com/question/14618322

#SPJ2

Answer:

D

Explanation:

Answer:

for plato users, the answer is: give the plant structure and support

Answer:

The meaning of this principle is building-up.

Explanation:

The Aufbau principle asserts that electrons occupy lower-energy atomic orbitals before filling higher-energy ones (Aufbau is German for "building-up") (Aufbau is German for "building-up"). By using this method, we may forecast the electron configurations for atoms or ions.

Answer:

reaction is NaHCO3 + HCL = H2CO3 + NaCl

the ratios are 1:1  

the 8 moles of HCl are in excess

so if you use 4 moles of NaHCO3 then you will obtain 4 moles of carbonic acid

hope that helps

Explanation:

Answer:

Beryllium, carbon, and oxygen do not create stars like the sun. The sun is a massive cluster of hydrogen atoms being fused into helium atoms and heavier metals like Beryllium, carbon, and oxygen through the process of nuclear fusion. The more mass a star has in its core the more fusions that can occur and the heavier the metals inside can be fused into.

Explanation:

hope this helps. . . <3

good luck!     uωu

Answer:

it doesn't house the sweat and oil glands

Explanation:

the epidermis doesn't house the oil and sweat glands but the dermis does

Answer:

see explanation

Explanation:

An AX₂E₂ geometry is derived from an AX₄ parent geometry and is based upon 4 regions of electron density about the central element and defines a tetrahedral geometry and the geometry is bent angular.

An example is the water molecule (H₂O) with two covalent O - H bonds and two free pair electrons on the central oxygen element.

Answer:

38.3 g

Explanation:

8) What mass of chlorine reacts with 20.0 g of iron to form iron(III) chloride?​

first write, then balance the equation

Fe + Cl2-------------> FeCl3

2Fe + 3Cl2----------> 2FeCl3

2 moles of Fe require 3 moles of Cl2

the atomic mass of Fe is 56

20/56= 0.36 moles of Fe

this requires o.36 X 3/2 = 0.54 moles of Cl2

Cl2 has a molar mass of 35.5 X 2=71

1 mole of Cl2 is 71g

0.54 moles is 0.54 X 71 g= 38.3 g

The mass of chlorine reacts with 20.0 g of iron to form iron(III) chloride is 38.3 g.

Mass is defined as a numerical representation of the fundamental characteristic of all matter, inertia.

It can also be defined as a dimensionless number used to describe the mass of a particle or item.

[tex]\rm 2Fe + 3Cl_2\rightarrow2FeCl_3[/tex]

As per the reaction 3 mole of chlorine is required for 2 mole of fluorine.

Atomic mass of fluorine = 56

Moles of Fe = 20 / 56

                    =  0.36 moles

This require 0.36 x 3/2 = 0.54 moles of Cl₂

Molar mass of Cl = 35.5

So for Cl₂ = 2 x 35.5 = 71 moles

For 1 mole of Cl₂ = 71 moles is needed

So, for 0.54 moles = 71 x 0.54

                               = 38.3 g

Thus, the mass of chlorine reacts with 20.0 g of iron to form iron(III) chloride is 38.3 g.

To learn more about mass, refer to the link below:

https://brainly.com/question/19694949

#SPJ2

Answer:

337.5 g NaCl

Explanation:

.90% saline solution = 90g saline (NaCl)/100mL water (H2O)

1. Use 375 mL to find mass

375 mL × (90 g NaCl/100 mL) = 337.5 g NaCl in 375 mL .9% saline solution

The amount of sodium chloride dissolved in 375 ml of a 0.90% saline solution is 337.5 g.

The concentration can be calculated when we have the molecular formula and its molecular weight. The concentration of the solution is calculated as the weight of a solute divided by the volume of the solution.

The weight/volume percentage of the solution is determined in the following way.

W/v (%) = weight of the solute/Volume of the Solution ( in mL)

Given, the concentration of the saline solution = 0.90 %

0.90 % saline solution means 90 g of NaCl is dissolved in 100 ml of water.

Given, the volume of solution = 375 ml

100 ml of saline solution containing NaCl = 90 g

Then 375 ml of saline solution containing NaCl = 90 ×375/100 = 337.5 g

Therefore, the amount of NaCl is equal to 337.5 g.

Learn more about molar concentration, here:

brainly.com/question/21841645

#SPJ2

Answer:

B. Activated Carbon

Explanation:

Answer:

21.86 grams

Explanation:

It is important to note that for every mol of Na3PO4 there is, 3 mols of Na ions are produced.

Na+=1m(0.4l), so mols of Na3PO4= 0.4/3= 0.13333... mols

the molar mass of Na3PO4 is 163.94 grams/mol. 0.1333*163.94=21.86 grams of Na3PO4.

This problem is asking for the consumption of silver ions when silver nitrate is reacted with copper. In such a case, since no masses are given, we can use the following from similar problems:

Mass of empty beaker: 110.000 g

Mass of beaker with silver nitrate (after all additions) and copper: 331.634 g.

Mass of beaker with silver: 113.395 g.

This means we can write the following chemical equation:

[tex]Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2Ag[/tex]

And thus calculate the mass of silver nitrate that will produce the following mass of silver:

[tex]m_{Ag}^{produced}=113.395g-110.000g=3.395g[/tex]

Next, we use the 2:2 mole ratio of silver to silver nitrate (silver ions source):

[tex]3.395gAg*\frac{1molAg}{107.87gAg}*\frac{2molAgNO_3}{2molAg} *\frac{169.87gAgNO_3}{1molAgNO_3} = 5.35gAgNO_3[/tex]

The step will be defined for the given mass of available silver nitrate which will be compared to 5.35 g (consumed mass) to see if they are the same (all consumed) or different (partial consumption).

Learn more:

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

The atomic number of the shown element Al (Alluminium) is ~

Explanation:

atomic number = no. of protons = 13

therefore atomic number of aluminium is 13 as given

so option D 13 is correct option .

hope this answer helps you dear! take care

Answer:

chemical reaction

Explanation:

The chemical reaction produces chemical changes to provide energy. Chemical reactions often involve changes in energy due to the breaking and formation of bonds.

Answer:

yes

Explanation:

what would happen if the next time you needed tape or glue you remember, oh wait theres none at the house, thats just an example of why you would indeed need adhesives

Answer:

Before we can sketch the Lewis structures of molecules, we must first understand the octet rule. The octet rule asserts that when atoms combine to create compounds, electrons are gained, lost, or shared among them, resulting in a stable electron configuration defined by eight valence electrons as a result. These rules are used in conjunction with the main-group components of the second period.

Explanation:

Hope it helps:)