NEED HELP WILL MARK U AS BRAINLIEST .

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:

Density

Explanation:

Density of a substance is the mass per unit volume of the substance.

Mass is the amount of particles contained in a matter

Volume is the space occupied by the substance;

 To find density, we simply use;

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

 So;

 Mass  = Density x Volume

   From;

            M = D x V

M is the mass

D is the is the density

V is the volume

Answer:

14

Explanation:

Given parameters:

Number of protons  = 6

Number of electrons  = 6

Number of neutrons = 8

Unknown:

Mass number  = ?

Solution:

The mass number of an atom is the sum of protons and neutrons in an atom;

 Mass number  = number of protons + number of neutrons

 Mass number  = 6 + 8  = 14

Answer: the answer is C hope it helps

Explanation:

Answer:

work done

Explanation:

i think

work done

this is answer

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:

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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A; Electron is your answer.

Answer:

Electron

Explanation:

An atom can either gain, share, transfer, and/or lose electron(s)

Answer:

u didn't give us the multiple hoice answer

Explanation:

Answer:

Here are the answer choices

Explanation:

A) Compounds contain atoms of at least two different elements.

B) Each element is made up of atoms.

C) Each element contains atoms with negatively charged particles.

D) Atoms within the same element have the same amount of mass.

Answer:

human can see visible light

Answer:

i beleive it is D. visible light

Explanation:

if im wrong sorry this subject isnt my forte

In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure, that occurs naturally in pure form.

hope this helps

Answer:

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

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:

class i believe

Explanation:

Answer:

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

Explanation:

mark as brainliest

Answer:

ok

Explanation:

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

Answer:

46.15

Explanation:

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:

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).

Answer:

1. melting

2. freezing

5. condensation

6. evaporation

Answer:

Measure of uncertainty thousands place or .01 mL

Yes it would be proper.

Explanation:

measure of uncertainty is when you as the user have to guess, since the pipette has marks every 0.1 ml then you can guess that the liquid is in between the marks or maybe closer to one mark then the other.

Answer:

C - show 7 neutrons in the nucleus

Explanation:

Use process of elimination:

-Answer A will not work because electrons are not in the nucleus.

-Answer B will change the atom's identity from nitrogen to fluorine; it will not work.

-Answer D will create a nitrogen ion, which is not what the prompt is asking for (an atom); it will not work.

The only logical answer is C, as that is the only one that is also true.

Answer:

3 Cu²⁺(aq) + 2 PO₄³⁻(aq) ⇒ Cu₃(PO₄)₂(s)

Explanation:

Let's consider the molecular equation between aqueous copper(II) chloride and aqueous sodium phosphate.

3 CuCl₂(aq) + 2 Na₃PO₄(aq) ⇒ 6 NaCl(aq) + Cu₃(PO₄)₂(s)

The complete ionic equation includes all the ions and insoluble species.

3 Cu²⁺(aq) + 6 Cl⁻(aq) + 6 Na⁺(aq) + 2 PO₄³⁻(aq) ⇒ 6 Na⁺(aq) + 6 Cl⁻(aq) + Cu₃(PO₄)₂(s)

The net ionic equation includes only the ions that participate in the reaction (not spectator ions) and insoluble species.

3 Cu²⁺(aq) + 2 PO₄³⁻(aq) ⇒ Cu₃(PO₄)₂(s)

Answer:

SUBSTANCES

Explanation:

According to this question, Jasmine is conducting an experiment in order to see how much temperature change occurs when three different substances are heated. Based on this experiment, the INDEPENDENT VARIABLE, which is the variable that is changed or manipulated is SUBSTANCES.

A controlled experiment is an experiment where all other variables except the INDEPENDENT VARIABLE is kept the same or unchanged. The independent variable is the only variable allowed to change, which in this case is the SUBSTANCES USED.

Answer:

D

Explanation:

the correct answer is d

Answer:

d

Explanation:

Its just seem like NaCl structure

Answer:

Answer: He should add a single dot below the symbol to correct the electron dot diagram of an aluminium atom.

Explanation: Electron dot structures are the structures in which valence electrons around an atom are shown. The electrons are represented as dots in these structures.

Aluminium is the 13th element of the periodic table.

Electronic configuration of Aluminium is given by:

Valence electrons of aluminium = 3

In the given image, 2 valence electrons are shown and total number of valence electrons are 3. So, in order to correct the diagram, he should add a single electron below the symbol.

Explanation:

yes giuve me brainliest

Answer:

it has 79 protons

Explanation:

the atomic number is equal to the number of protons an element has.

On the periodic table, gold has the atomic number 79. This means that the gold has a total of 79 protons present inside its nucleus, as the number of protons signifies the atomic number.

The total number of protons present in an atom is known as the atomic number of that atom.

The atomic number has no correlation either with the number of neutrons or the number of electrons present inside an atom

The current periodic table divides elements into groups according to their increasing atomic numbers.

The atomic number of gold is 79 on the periodic table. This indicates that the gold's nucleus has 79 protons in total, where the number of protons represents the atomic number.

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