CAN SOMEONE PLEASE HELP ME ANSWER THIS QUESTION​

Answer:

this is the structure of beta myrcene but im notsure which structure you were looking for

Answer:

work done

Explanation:

i think

work done

this is answer

Answer:

False

Explanation:

That would still be very unsafe

Answer:

False

Explanation:

even thought it may be washed completely certain chemicals can still remain and be harmful when you consume the food that is put into. Especially if you add heat or cold to the container.

Answer:

The hydroxyl ions (OH-) released will combine with any hydrogen ions (H+) in the solution to form water molecules (OH- + H+ = H2O).

Explanation:

Answer:

Density = 4.191 gm/L

Explanation:

Given:

Molar mass = 93.89 g/mol

Volume(Missing) = 22.4 L (Approx)

Find:

Density at STP

Computation:

Density = Mass/Volume  

Density = 93.89 / 22.4  

Density = 4.191 gm/L

Answer:

a. Ca(s) + 2H⁺ → Ca²⁺ + H₂(g)

b. 0.0100 moles Ca; 0.0140 moles HCl.

c. HCl is limiting reactant.

d. 0.0030 moles of Ca

Explanation:

a. In water, HCl dissociates in H⁺ and Cl⁻ and CaCl₂ in Ca²⁺ and 2 Cl⁻. The ionic equation is:

Ca(s) + 2H⁺ + 2Cl⁻ → Ca²⁺ + 2Cl⁻ + H₂(g)

b. Moles Ca -Molar mass 40.1g/mol-:

0.401g * (1mol / 40.1g) = 0.0100 moles Ca

Moles HCl:

0.350L * (0.0400mol / L) = 0.0140 moles HCl

c. In the reaction, 1 mole of Calcium reacts with 2 moles of HCl.

For a complete reaction of 0.0100 moles of Calcium there are necessaries:

0.0100mol Ca * (2 mol HCl / 1 mol Ca) = 0.0200 moles HCl

As there are just 0.0140 moles of HCl,

HCl is limiting reactant

d. For a complete reaction of 0.0140 moles of HCl, the moles of Ca that react are:

0.0140 moles HCl * (1 mol Ca / 2 mol HCl) = 0.0070 moles Ca

That means will remain:

0.0100 moles - 0.0070 moles:

0.0030 moles of Ca

Explanation:

petrol or bitumen and at least one use of petrol and at least one use of bitumen eg petrol has a lower boiling point and is used as a fuel in cars, bitumen is more viscous and is used to surface roads.Aug 19, 2015

Petrol and bitumen fractions differ in their properties and uses in a number of ways with regard to melting point, viscosity, ignition ,combustion .

Petrol has less number of carbon chains while bitumen has large number of carbon chains.Bitumen has higher melting and boiling point as compared to petrol.

Petrol has higher viscosity as compared to bitumen.It combusts easily while bitumen does not combust completely ,it produces large number of carbon monoxide or soot.

Petrol fractions are used in cars,motorbikes,etc. while bitumen fractions are used in road surfaces and roofing. Boiling point of petrol is 35-70°C while that of bitumen is 700°C.Bitumen is more viscous as compared to petrol.

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Answer: the answer is C hope it helps

Explanation:

Answer:

I think it is c

Explanation:

Answer:

14.44 Liters

Explanation:

4NH3(g) + 5O2(g) -----> 4NO(g) + 6H2O(g)

From the equation of the reaction, the mole ratio of NH3 to NO2 = 1:1

Therefore 0.12 moles of NH# produces 0.12 moles of NO

Also from the equation of reaction, mole ratio of NH3 to H20 is 4:6

Therefore, 0.12 moles of NH3 will produce  0.12 * 6/ 4 moles of H2O =0 0.18 moles of H2O

Total moles of gases produced = 0.30 mole

From Avogadro's law:

v1/n1 = v2/n2

v1 = 13.0 L

n1 = 0.12 + 0.15= 0.27 moles

v2 = ? =

n2 = 0.30

V2 = v1n2/n1

v2 = 13.0 * 0.30/0.27

V2 = 14.44 Liters

Answer:

the oldest rocks are in the center of the dome structure.

Explanation:

Answer:

Center

Explanation:

Answer:

Altaïr is an ancestor (on the maternal side) of Desmond Miles, a modern-day assassin. He was trained in the Masyaf Castle in Syria by Al Mualim, his guardian since childhood.

Explanation:

Answer:

1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4p6, 5s2, 4d10, 5p6, 6s2, 4f14, 5d10, 6p2.

Explanation:

mark as brainliest

Answer:

1. melting

2. freezing

5. condensation

6. evaporation

Answer:

0.15atm

Explanation:

Given parameters:

Mass of dry ice = 1.28g

Volume of chamber  = 5L

Temperature  = 35.1°C = 35.1 + 273  = 308.1K

Unknown:

Pressure in the chamber  = ?

Solution:

As we assume ideality for the gases in the cylinder, we use the equation below to solve the problem;

             PV  = nRT

P is the pressure

V  is the volume

n is the number of moles

R is the gas constant  = 0.082atmdm³mol⁻¹k⁻¹

T is the temperature

 Let us find the number of moles;

       Molar mass of CO₂  = 12 + 2(16) = 44g/mol

  Number of moles of  CO₂ = [tex]\frac{mass}{molar mass}[/tex]

  Number of moles of CO₂  = [tex]\frac{1.28}{44}[/tex]   = 0.03moles

 So;

Input the parameters and solve;

        P x 5  = 0.03 x 0.082 x 308.1

         5P  = 0.73

           P = [tex]\frac{0.73}{5}[/tex]   = 0.15atm

Answer:

Chemical digestion

Explanation:

The type of digestion taking place within the stomach is chemical digestion. When food reacts with stomach acids and other enzymes, a reaction takes place which reduces the food into simpler bits.

Answer:

Genetic Diversity Examples

Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species, it ranges widely from the number of species to differences within species and can be attributed to the span of survival for a species.

Explanation:

i hope this helps u.

Answer:

1.4776 g

Explanation:

First, let us determine the number of moles present in  100 mL of 0.1005 M solution of Ca2+.

mole = molarity x volume in Liter

mole of Ca2+ = 0.1005 x 0.1 = 0.01005

Also,

mole = mass/molar mass

mass of 0.01005 mole Ca2+ = mole x molar mass

                 = 0.01005 x 147.02 = 1.4776 g

Since 1 mole of Ca2+ is present is 1 mole of CaCl2·2H2O, 1.4776 g of CaCl2·2H2O would be weighed out in order to prepare 00mL of a 0.1005M solution of Ca2+.

To prepare a 100 mL solution of 0.1005 M [tex]Ca^2^+[/tex], we would need to weigh out approximately 14.737 grams of [tex]CaCl_2.2H_2O[/tex].

We must use the molar mass and molarity formula to calculate the mass of [tex]CaCl_2.2H_2O[/tex] needed to make a 0.1005 M solution of [tex]Ca^2^+[/tex].

Let's start by figuring out how many moles of [tex]Ca^2^+[/tex]are needed for the solution:

Molarity (M) = moles/volume (L)

0.1005 M = x moles/0.1 L (100 mL converted to liters)

x = 0.1005 moles of [tex]Ca^2^+[/tex]

So, the molar mass of [tex]CaCl_2.2H_2O[/tex]:

Ca (40.08 g/mol) + 2Cl (35.45 g/mol) + 2([tex]H_2O[/tex]) (2 * 18.02 g/mol) = 147.02 g/mol

Then, we calculate the mass

Mass = moles * molar mass

Mass = 0.1005 moles * 147.02 g/mol

Mass = 14.737 grams

Therefore, to prepare a 100 mL solution of 0.1005 M [tex]Ca^2^+[/tex], we would need to weigh out approximately 14.737 grams of [tex]CaCl_2.2H_2O[/tex].

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Answer:

Topographical is the correct ans

The reactants in the reaction HCl + NaOH → NaCl + H₂0 are HCI and NaOH Hence, Option (A) is correct

The substance(s) to the left of the arrow in a chemical equation are called reactants.

A reactant is a substance that is present at the start of a chemical reaction.

In the given case, HCI and NaOH are the reactants, they both react to form the products, which are NaCl and H₂0.

Therefore,The reactants in the reaction HCl + NaOH → NaCl + H₂0 are HCI and NaOH Hence, Option (A) is correct

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Answer:

Reproductive cells(also known as sex cells) are gametes.

Explanation:

Have a great day :)

Answer:

Gametes are an organism's reproductive cells

Explanation:

Answer:

what's the question? is it A

A 30.0 ml sample of 0.200 M Ba(OH)2 is titrated with 0.100 M HCl. teh pH will be:

a) The pH of the solution before the addition of HCl is 13.301.

b) The pH of the solution after the addition of 25.0 mL HCl is 13.494.

pH is potential hydrogen. It is the measurement of the acidity and basicity of any solution.

a)

[tex]\rm Ba(OH)_2 = Ba_2+ + 2OH^-Ba(OH)_2[/tex]

Given, [OH¯] = 0.200 M

pOH = -log 0.200 = 0.699

pH = 14.000 - pOH = 14.000 - 0.699 = 13.301

b)

Now 25 ml HCl is added

0.025 × 0.100 = 0.0025

Moles of OH = 0.02 × 0.0025 = 0.0005

Remaining OH =   0.0025 – 0.0005  = 0.00245

Now calculate the pH

0.055 is divided by 0.200 = 0.275

pOH = -log 0.275 = 0.5606

pH = 14.000 - 0.5606 = 13.4394

Thus, a) 13.301.

b) 13.4394.

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Answer:

Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances. Tin, sulfur, and diamond are examples of pure substances that are chemical elements. All elements are pure substances

Explanation:

Answer:

97.8

Explanation:

Answer:Electrical

Explanation:because its above the earth's surface

Answer:

Chemical O

Explanation:

Answer:

I would say A

Explanation:

normally wind and water will work together to erode or brake away a cliff or mountain.

There is an example of this in Illinois (There are eroded away cliffs located next to the Mississippi River, they stretch from around Grafton to Alton).