Do all variations help organisms survive

Answer:

Hope it help you

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Explanation:

Primary succession is the series of community changes which occur on an entirely new habitat which has never been colonized before. For example, a newly quarried rock face or sand dunes. Secondary succession is the series of community changes which take place on a previously colonized, but disturbed or damaged habitat.

REAL NAME - SHRESTH DUBEY

Answer:

7.0

Explanation:

P1V1=P2V2 if temperature and moles are constant, which they appear to be

3.5*2.5=1.25x

x=8.75/1.25

x=7

Answer:

I never had a crush on anyone

Explanation:

Answer:

Geology

Explanation:

Geology is not a branch of biology.

Biology is the study of all forms of lives. Bio - life and logy - study

It consists of studies of plants, animals and micro-organisms. Some of its sub-branches are zoology, botany, genetics, micro-biology e.t.c.

Answer:

geology

Explanation: I took the test.

Answer:

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Explanation:

in CI2 the electron charge is identical on both atoms but on HCI electrons are shared unequally between the chlorine atoms and hydrogen atoms

Answer:

it means a hamburger has less calories bc its referring to steak that has been grounded and the highlight would be calories

Answer:

a. First order.

b. [tex]k=3.7x10^{-3}s ^{-1}[/tex]

c. [tex]t_{1/2}=187.3s[/tex]

d. [tex][A]=0.111M[/tex]

Explanation:

Hello.

a. In this case since the slope is in s⁻¹ we can infer that the lineal form of the rate law is:

[tex]ln[A]=-kt+ln[A]_0[/tex]

Which is also:

[tex]y=mx+b[/tex]

It means that the reaction is first-order as slope equals the negative of the rate constant which also has units of first-oder reaction.

b. Since the slope is −3.7 x 10−3 s−1 the rate constant is:

[tex]k=-m\\\\k=-(-3.7x10^{-3}s ^{-1})\\\\k=3.7x10^{-3}s ^{-1}[/tex]

c. For first-order reactions, the half-life is:

[tex]t_{1/2}=\frac{ln(2)}{k}\\ \\t_{1/2}=\frac{ln(2)}{3.7x10^{-3}s^{-1}}\\\\t_{1/2}=187.3s[/tex]

d. In this case, since the integrated first-order rate law is:

[tex][A]=[A]_0exp(-kt)[/tex]

The concentration once 220 seconds have passed is:

[tex][A]=0.250Mexp(-3.7x10^{-3}s^{-1}*220s)\\\\[/tex]

[tex][A]=0.111M[/tex]

Regards.

Answer:

Density of pineapple is 6 g/mL.

Explanation:

Given data:

Mass of pineapple = 30 g

Volume rises = 5 mL

Density of pineapple = ?

Solution:

Density:

Density is equal to the mass of substance divided by its volume.

The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

The volume rises by drink is actually the volume of pineapple.

d = 30 g/ 5 mL

d = 6 g/mL

Density of pineapple is 6 g/mL.

Answer:

The mass of object is 0.5 Kg.

Explanation:

Given data:

Acceleration of object = 12.0 m/s²

Force on object = 6.0 N

Mass of object = ?

Solution:

Formula:

F = m×a

F = force

m = mass

a = acceleration

Now we will put the values in formula.

6.0 N = m  × 12.0 m/s²

m =  6.0 N / 12.0 m/s²  

   ( N = kg.m/s²)

m = 0.5 kg

The mass of object is 0.5 Kg.

Answer:

qualitative data :           quantitative data :      

circular in shape            75 colonies ...          

stained purple               200 purple ..

spreads across plate    55 colonies ...          

Explanation:

i got it right :) .

Answer:

Same XD  Have a bless day ^﹏^^O^^O^^O^

Explanation:

Answer: c

Explanation:

Answer: C - Centuries

Explanation:

Answer: it should be 2.8

Explanation:

it is never greater than the atomic number.

OR,

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Answer:

there are three different subatomic particles inside them: the protons, neutrons, and electrons

I know I'm answering super late, but I just want to help others who don't know the answer

Answer:

H. The two elements are in the same group, with Element R just above Element Q.

Explanation:

When answering a question like this, I would highly recommended using a periodic table. I used a periodic table to find the answer to the question.

Answer:

What would be the formal charge of N in NO2?

Explanation:

The nitrogen gets two electrons for the double bond, one from the single bond and one from the half-filled orbital associated with it. That's a total of 4 and gives N a +1 formal charge since itneeds 5 to be neutral. The Rules for Writing Lewis Structures has some discussion of formal charge in it.

Explanation:

Label A: oceanic - oceanic

Label B: oceanic - continental

Label C: continental - continental

Answer:

Oceanic-continental convergence---- letter B.  

Oceanic-oceanic convergence ---- letter A.

Continental-continental convergence ---- letter C

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Velocity change increases as the force increases.

Even though this question is incomplete, but we can approach it from the stand point of Newton's second law of motion.

According to this law, force is directly proportional to change in velocity.

F = m(v - u)/t

F = force applied

m = mass of the body

v = final velocity of the body

u = initial velocity of the body

t = time taken

This means that velocity change increases as force increases.

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Answer:

Protons, Neutrons and electrons

Explanation:

Answer:

1.  Can help in development of effective medications

2.  Can help explain genetic diseases

3.  Composed of about 19,000 genes

Explanation:

The other answer options are misleading.

Genetic code of humans can help with understanding more than just human genetics.

Human genetics is composed of 23 chromosome pairs, for a total of 46 chromosomes.

Answer:

feel slippery

Explanation:

Bases are certain metallic oxides, metallic hydroxides and aqueous ammonia. They typically have the following characteristics;

From the choices given, the fitting answer is that bases have a slippery feel.

Answer:

B) Feel slippery

Explanation:

Just did the assignment

Answer:

[tex]0.000056[/tex]

Explanation:

If [tex]pH[/tex] is given then hydronium ion concentration is equal to [tex]-log[H_3O^+][/tex]

The hydronium ion concentration can be found from the pH using the following formula:

Hydronium ion concentration = [tex]10^{-pH}[/tex]

As the pH of a HClO4 solution was measured as 4.251,

put [tex]pH=4.251[/tex]

So,

Concentration of HClO4 in the solution = [tex]10^{-4.251}=0.000056[/tex]

Answer:true

Explanation:

The neutrons and the protons are what stay there

Answer:

hi

Explanation:

how r u today

Answer:

λ = 5.56 × 10⁻³ m

Explanation:

You have to use the formula c = λv to solve the problem.  Review what you are given.  You are given v and c, where v = 5.40 × 10¹⁰ Hz and c = 3.00 × 10⁸ m/s.  The value c is for the speed of light and is something you need to memorize.  You will use it often in physics and sometimes in chemistry.

Now that you figured out what you know, you can see that there is only one unknown, allowing you to solve.

c = λv

λ = c/v

λ = (3.00 × 10⁸ m/s)/(5.40 × 10¹⁰ Hz)

λ = 5.56 × 10⁻³ m

Answer:

3.25 x 10²⁴ atoms of H

Explanation:

First you have to convert from grams to moles of C₂H₆O using the molar mass of C₂H₆O, which is 46.06 g/mol. Then convert from moles of C₂H₆O to moles of H using the ratio within the compound; for every molecule of C₂H₆O, there are 6 H atoms. Then lastly, because moles just represent a number in the same way a dozen does, we convert from moles of H to the number of atoms of H. 1 mole H = 6.022 x 10²³ atoms of H.

[tex]41.4g*\frac{1molC2H6O}{46.06C2H6O} * \frac{6 mol H}{1molC2H6O} * \frac{6.022 * 10^2^3atomsH}{1molH} = 3.2476 x 10^2^4atomsH[/tex]

Round to lowest number of significant figure which is three to get 3.25 x 10²⁴.

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. The the total number of atoms of hydrogen atoms in 41.4 g of ethyl alcohol, C₂H₆0 is 5.35×10²³ atoms.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

Number of atoms =number of moles×6.022×10²³ (Avogadro number)

number of moles= given mass÷ Molar mass

Given mass=41.4 g

Molar mass of C₂H₆0=46.07 g/mol

number of moles= 41.4 g ÷ 46.07 g/mol=0.89mol

Number of atoms =0.89mol×6.022×10²³ (Avogadro number)

                             =5.35×10²³ atoms

Therefore, the total number of atoms of hydrogen atoms in 41.4 g of

ethyl alcohol, C₂H₆0 is 5.35×10²³ atoms.

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Answer:

1.7

Explanation:

The formula to be used here is;

pH = -log[H⁺]

To determine the concentration of H⁺ of the nitric acid (HNO₃), formula for molarity is used

Molarity = number of  moles/volume (in dm³ or L)

number of moles (n) = given mass/molar mass

Molar mass of HNO₃ = 1 + 14 + (16 x 3)

= 63g

given mass (in grams) = 320mg⇔0.32g (where 1000mg = 1g)

Thus; n = 0.32/63

n = 0.0051 moles

Volume of acid = 290 mL ⇔ 0.29 L (where 1000 mL = 1L)

Molarity = n/volume;

0.0051/0.29

Molarity = 0.018M

pH = -log 0.018

pH = 1.7

Answer:

Quantitative Observations

Explanation:

Answer:

option b is correct option = (6.76×10¹⁴ Hz)

Explanation:

Given data:

Wavelength of photon = 4.42×10⁻⁷ m

Speed of light = 2.99×10⁸ m/s

Frequency of radiation = ?

Solution:

Formula:

Speed of wave = frequency × wavelength

Now we will rearrange this formula.

frequency  = Speed of wave / wavelength

f = c/ λ

f =  2.99×10⁸ m/s / 4.42×10⁻⁷ m

f = 0.676×10¹⁵ Hz   (s⁻¹ = Hz)

f = 6.76×10¹⁴ Hz

Thus option b is correct option.