Can you please help me

Can You Please Help Me

Answers

Answer 1

Shure what you need help with


Related Questions

33 POINTS PLS ANSWER USE SCIENTIFIC NOTATION TO SOLVE

Answers

I think the answer is 7

An alkene reacts with a strong protic acid to form a carbocation. In Part 1 draw the curved arrow notation for the reaction between an alkene and HBr. However, an alkene will react with a halogen electrophile to form a cyclic intermediate. In Part 2 draw the curved arrow notation for the reaction between an alkene and Br2.

Answers

Answer:

See explanation and image attached

Explanation:

Now, we have chosen the alkene 1-propene in our example.

In the first reaction of  1-propene  with HBr, the reaction proceeds by ionic mechanism leading to the formation of 2-bromo propane.

In the second reaction of  1-propene  with the bromine molecule, the first step is the formation of the brominium cation which is a cyclic intermidiate followed by the addition of Br^- yielding the 1,2- dibromopropane product

What is the volume of which 0.25 mole of a gas occupied at 0.5 atm and 50°C ?

Answers

The volume of the gas : V = 13.243 L

Further explanation

Given

n = 0.25 mole

P = 0.5 atm

T = 50 + 273 = 323 K

Required

The volume

Solution

Ideal gas law

PV=nRT

R = gas constant = 0.082 L.atm/mol K

V = nRT/P

Input the value :

V=0.25 x 0.082 x 323 / 0.5

V = 13.243 L

please complete work

Calculate the molar mass of ammonium salfate:(NH4)2SO4

Answers

Answer:

132.14 g/mol

Explanation:

fluorine is more reactive than chlorine.​

Answers

True. One reason is it’s electronegativity.

Answer:

yes because of fluorine has higher electronegativity

Will mark brainliest!!!! 15 pts!!!!Please solve these equations

Answers

2 K3PO4 + 3 BaCl2 = 6 KCl + Ba3(PO4)2
reaction type: double replacement

2 Al(OH)3 + 3 H2SO4 = Al2(SO4)3 + 6 H2O
reaction type: double replacement

2 HCl + K2CO3 = 2 KCl + H2O + CO2
i think there are two reactions here, so double replacement and decomposition

2 AgNO3 + Na2CO3 = Ag2CO3 + 2 NaNO3
reaction type: double replacement

2 Al2O3 = 4 Al + 3 O2
reaction type: decomposition

Need help asap!

1. Given that the electronegativity of sulfur (S) is 2.5 and that of silicon (Si) is 1.8, which of the following best describes the chemical bonding in silicon monosulfide (SiS)?
A. ionic: transfer of electrons from silicon to sulfur
B. nonpolar covalent: equal sharing of electrons between silicon and sulfur
C. polar covalent: electrons shared between silicon and sulfur but attracted more to the sulfur
D. polar covalent: electrons shared between silicon and sulfur but attracted more to the silicon

2. Which of the following is a molecular compound?

A. Mg3N2
B. NH3
C. AlCl3
D. LiBr

3. Potassium (K) reacts with a certain nonmetallic element (Z) to form a compound with the general formula KZ; where element Z is a diatomic gas at room temperature. What is element Z?

A. Oxygen
B. Fluorine
C. Nitrogen
D. Hydrogen

Answers

Answer: 1.  C. polar covalent: electrons shared between silicon and sulfur but attracted more to the sulfur

2. B)  [tex]NH_3[/tex]

3. B) Fluorine

Explanation:

1. A polar covalent bond is defined as the bond which is formed when there is a difference of electronegativities between the atoms.

Electronegativity difference = electronegativity of sulphur- electronegativity of silicon = 2.5 -1.8 = 0.7

Thus as electronegativity difference is less than 1.7 , the cond is polar covalent and as electronegativity of sulphur is more , the electrons will be more towards sulphur.

2. A molecular compound is usually composed of two or more nonmetal elements. Example: [tex]NH_3[/tex]

Ionic compound is formed by the transfer of electrons from metals to non metals. Example: [tex]Mg_3N_2[/tex] , [tex]AlCl_3[/tex] and [tex]LiBr[/tex]

3.  For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Here K is having an oxidation state of +1 and as the compound formed is KZ, the oxidation state of non metallic element Z should be -1. Thus the element Z is flourine which exists as diatomic gas [tex]F_2[/tex]

How many moles are in 56.4 grams of AlF3

Answers

Answer: 0.671614483912211

Explanation: A mole is 6.02214076×1023 (also known as the Avogadro number) I hope this helps!

6- A favorable condition for two elements to form an ionic bond is?
a- both should be electronegative
b- one should have low electron affinity and the other low ionization energy.
C- one should have high electron affinity and the other low ionization energy.
d- both should be highly electronegative​

Answers

Answer: C- one should have high electron affinity and the other low ionization energy.

Explanation:

Ionization energy is the energy required to remove the electron from an isolated gaseous atom.

Electron affinity is the tendency of an isolated atom to attrcat the electrons towards itsellf.

An ionic bond is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element or the metal and it can donate electron easily if it has low ionization energy.

The element which accepts the electrons is known as electronegative element or non metal and it can easily accept the electron if it has high electron affinity.

5. When an electric current is passed through water during the process of electrolysis, two gases are formed. One gas has a boiling point of -183°C and the other has a boiling point of -253ºC. Was this event a physical
change or a chemical change?
It was a chemical change.
It was both a chemical and physical change
It was a physical change
It could have been either a physical or chemical change.

Answers

Answer:

Change is happening all around us all of the time. Just as chemists have classified elements and compounds, they have also classified types of changes. Changes are classified as either physical or chemical changes. Chemists learn a lot about the nature of matter by studying the changes that matter can undergo. Chemists make a distinction between two different types of changes that they study—physical changes and chemical changes.

If the density of a certain oil is 0.8gcm3. What is the mass of 10 cm3 sample of this oil?
report your answer with one significant figure.

Answers

Taking into account the definition of density, the mass of the sample of oil with a volume of 10 cm³ and a density of 0.8 [tex]\frac{g}{cm^{3} }[/tex]  is 8 grams.

Definition of density

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

[tex]density=\frac{mass}{volume}[/tex]

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

Mass of the sample of oil

In this case, you know that:

Density= 0.8 [tex]\frac{g}{cm^{3} }[/tex]Volume= 10 cm³

Replacing in the definition of density:

[tex]0.8 \frac{g}{cm^{3} } =\frac{mass}{10 cm^{3} }[/tex]

Solving:

mass=  0.8 [tex]\frac{g}{cm^{3} }[/tex] × 10 cm³

mass= 8 g

In summary, the mass of the sample of oil with a volume of 10 cm³ and a density of 0.8 [tex]\frac{g}{cm^{3} }[/tex]  is 8 grams.

Learn more about density:

brainly.com/question/952755?referrer=searchResults

brainly.com/question/1462554?referrer=searchResults

What is the mass of .89 moles of lithium metal, used in laptop batteries?

Answers

6.17749 would be the mass

The mass of lithium metal that is used in lithium batteries is 6.17 grams,  this can be calculated by using number of moles formula.

Number of moles:

It is defined as the ratio between mass and molar mass.

It is given by:

Number of moles = mass / Molar mass

What information do we have?

Number of moles= 0.89 moles

Molar mass of Lithium metal= 6.941 g/mol

To find:

Mass of Lithium metal=?

On substituting the values

n= m/M

0.89 = m/ 6.941

m= 0.89*6.941

m= 6.177 grams

Thus, the mass of lithium metal is 6.177 grams.

Find more information about Number of moles here:

brainly.com/question/13314627

Which choice has prokaryotic cells?

human blood

onion root

cow's liver

E. coli

Answers

The answer is E. coli

How many grams of iron are needed to produce 3 g of iron(III) chloride?

Answers

Answer:

5 its just what i do

Explanation:

A 10.0 g sample of water was heated from 20.0°C to 50.0°C. How much energy did the water gain? The specific heat of water is 4.18 J/g·°C.
a.836 J
b.1250 J
c.2920 J
d.4180 J

Answers

Answer:

im pretty sure c

Explanation:

What are the coefficients that would correctly balanced reaction

Answers

Li2CO3 + Ca3(PO4)2 = Li3PO4 + CaCO3

Answer: As a consequence, chemical equations must be balanced, meaning that the number and kinds of atoms must be the same on both sides of the reaction arrow. The numbers placed in front of formulas to balance equations are called coefficients, and they multiply all the atoms in a formula.

Thermodynamics and Q
How much energy is needed to heat 40.5g of water from 15.6°C to 73.0°C

Answers

Answer:

9717.246 J

Explanation:

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

Mass (m) of water = 40.5 g

Initial temperature (T₁) = 15.6 °C

Final temperature (T₂) = 73 °C

Specific heat capacity (C) of water = 4.18 J/gºC

Heat (Q) =.?

Next, we shall determine the change in the temperature of water. This can be obtained as follow:

Initial temperature (T₁) = 15.6 °C

Final temperature (T₂) = 73 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 73 – 15.6

ΔT = 57.4 °C

Finally, we shall determine the heat energy required. This can be obtained as follow:

Mass (m) of water = 40.5 g

Specific heat capacity (C) of water = 4.18 J/gºC

Change in temperature (ΔT) = 57.4 °C

Heat (Q) =.?

Q = MCΔT

Q = 40.5 × 4.18 × 57.4

Q = 9717.246 J

Thus, the heat energy required is 9717.246 J

Homogeneous mixtures have components that are unevenly spaced throughout true or false

Answers

Answer:

False

Explanation:

Mixtures are impure substances.

There are two types of mixtures based on the number of coexisting phases.

Homogeneous mixtures have their constituents existing in one single phase. The components are evenly spaced.

Heterogeneous mixtures have their constituents existing in at least two different phases. Therefore, they are unevenly spaced due to the phases present within the mixture.

PLZ HELP BEING TIMED!!!!!PLZ ANSWER!!!!

Answers

Answer:

1st one

Explanation:

If you have moles and want to convert to liters, which conversion factor would you use

Answers

Answer:

When converting from liters to moles or moles to liters, you will use the equality 1 mole=22.4 L for a gas at STP.

If you have moles and want to convert to (Volume) liters, 1 mole = 22.4 L is the conversion factor that can be used.

The area that any three-dimensional solid occupies is known as its volume. These solids can take the form of a cube, cuboid, cone, cylinder, or sphere. Various forms have various volumes. We have studied the several solids and forms that are specified in three dimensions, such as cubes, cuboids, cylinders, cones, etc., in 3D geometry. We will discover how we can determine the volume for each of these shapes. One mole of any gas have 22.4 L at STP.

1 mole = 22.4 L

To know more about volume, here:

https://brainly.com/question/28058531

#SPJ6

The density of aluminum is 2.70 g/cm^3. A square piece of aluminum foil, 22.86 cm on a side is found to weigh 2.568 g. What is the thickness of the foil, in millimeters?

Answers

Answer:

0.00182 cm

Explanation:

Area of the aluminum foil = 22.86 cm ×22.86 cm = 522.58 cm^2

Density = mass/area × thickness

Density × area × thickness = mass

Thickness = mass/ Density × area

Thickness = 2.568 g/2.70 g/cm^3 × 522.58 cm^2

Thickness= 0.00182 cm

In the following acid-base the reaction HCI is
A. Acid
B. Conjugate acid
C. Conjugate base

HCl(g) + H2O(l) →H30+(aq) + Cl-(aq)

Answers

Acid. HCl is a strong acid and dissociate completely.

Science can best be described as

Answers

a way of building knowledge about the world around us through observation and experimentation.

4.96 megameters to inches show work

Answers

There has to be something else then just what you said

HELPPP PLEASE
Calculate the mass of beryllium (Be) needed to completely react with 18.9 g nitrogen gas (N2) to produce Bez N2, which is the only product of the reaction.
A. 6.19
B. 12.29
C. 18.29
D. 36.69

Answers

Answer:

Mass = 18.29 g  

Explanation:

Given data:

Mass of beryllium needed = ?

Mass of nitrogen = 18.9 g

Solution:

Chemical equation:

3Be + N₂    →    Be₃N₂

Number of moles of nitrogen:

Number of moles = mass/molar mass

Molar mass of nitrogen = 28 g/mol

Number of moles = 18.9 g/ 28 g/mol

Number of moles = 0.675 mol

Now we will compare the moles of nitrogen and Be.

                       N₂        :       Be        

                        1          :       3

                   0.675       :      3/1×0.675 = 2.03 mol

Mass of Be:

Mass = number of moles × molar mass

Mass = 2.03 mol ×   9.01 g/mol

Mass = 18.29 g  

Think of 6 to 10 questions that ask participants how they keep (or kept) their
homes or businesses warm in cold weather and cool in hot weather. Your
questions may ask about the types of devices used, the sources of energy
used to run the devices, the effectiveness of the methods used, or effects on
the environment. worth 100 points!!

Answers

Answer:

One could be What kind of insulator do you use in the winter?

Explanation:

The specific heat capacity of methane gas is 2.20 J/g-K. How many joules of heat are needed to raise the
temperature of 5.00 g of methane from LaTeX: 36.0^\circ C36.0 ∘ C to LaTeX: 75.0^\circ C75.0 ∘ C?

Answers

Heat needed to raise the temperature : Q = 3432 J

Further explanation

Given

c = The specific heat capacity = 2.20 J/g-K

m = mass = 5 g

Δt = Temperature difference = 75-36 =39 °C=312 K

Required

Heat needed

Solution

Heat can be formulated

Q = m.c.Δt

Input the values :

Q = 5 g x 2.2 J/g-K x 312 K

Q = 3432 J

In which phase of cellular respiration is oxygen a substrate ?

Answers

Answer:

electron transport 11 is the correct answer

draw for all constitutional isomers that have molecular formula C2H6O2​

Answers

Answer:

Explanation:

Two or more compounds are said to be isomers if they have the same molecular formula but different structures.

Isomers that have the same molecular formula but different connectivity are largely regarded as constitutional isomers.

From below, we can see the different constitutional isomers of C2H6O2.

(a)

[tex]\mathbf{CH_3 - O - O - CH_3}[/tex]

(b)

CH₃ - CH₂ - O - O - H  

(c)

   [tex]OH\ \ \ \ \ \ \ \ \ \ \ OH[/tex]

     |                |

 CH₂    --     CH₂

(d)

           OH

            |

CH₃ -- CH

            |

          OH

(e)

[tex]\mathbf{CH_3- O - CH_2-OH}[/tex]

How far in advance is weather forecasting most accurate?

one week
one month
multiple years
multiple months

Answers

Answer:

One week.

Explanation:

I would think one month because on weather websites you can see a month of weather. But the closer the day your looking at the prediction will be more accurate.

The most accurate range of data for weather forecasting is: A. one week.

What is weather?

Weather can be defined as the average atmospheric conditions of a particular area (region) over a short period of time.

The elements of weather.

Some examples of the elements of weather include the following:

PrecipitationAtmospheric pressureRelative humidityWind speedTemperature

In meteorology, the most common forecasted element of weather is temperature (degree of hotness or coldness) and it usually done a weekly basis such as one week.

Read more on weather here: https://brainly.com/question/24730207

Other Questions
how do you say "are you sick" in spanish? Answer for 19 and 21? help Which areas should Jose improve before delivering his speech to the principal? Select three options.pacevolumegestureslanguageexpression Choose one of the animals listed on the page, and write a brief description of its characteristics. Be sure to discuss any ways the animal has adapted to its environment. 88 students for 4 classes how many students per class? Help plz:)))Ill mark u Brainliest If 0 = 35, then solve for X.9Round to the nearest hundredth. Please help at least one Number it please!!!! Which sentence most clearly describes a theme?O A. Romeo's affection for Juliet is forbidden.O B. Characters' actions illustrate their values.O C. Beauty is superficial and often fleeting.O D. Storms represent danger in many stories. 1). How is litter harmful to wildlife?2.) How are bottom trawlers damaging Earth's oceans?3.) How has the peregrine falcon adapted its nesting behavior.4.) What "weed" is vital to the survival of the monarch butterfly? write about a dinning place that you have visited in your hometown use some of the vocabulary that you have learned: me gusta, no me gusta, auto servicio, propina, reserva,camarero What are the coordinates of point A?I will give brainliest:) D. The _____________________ converts food into energy. It is found in both plant cells and animal cells. Thomas calculates the volume of an object by multiplying the measurements 1.74 cm x 2.3 cm x 3.09 cm. Using significant figures, how should the answer be reported? unit rate for $112 in 8 hours The effective operation of a firm and its supply chain is more important than the design and implementation of its processes. True False 17.URGENT Can someone please help me? Find the value of x.ZY11x 1080WX Sophie had two different coupons for the book store, 15% off coupon or the $2.50 off coupon. The store only allows you to use one coupon at time. The book she wanted was $12. Which is a better coupon for sophie to use and why I need help quick please!!!!