What are the first two levels of cellular organization?

Answers

Answer 1

Answer:

Cells and tissue

Explanation:

Cells are the smallest functional units of all living things

Tissue is organic material from which organs and their bodily structures appear


Related Questions

In the reaction given below, 23.5 grams of iron(III) oxide (Fe2O3) are reacted with excess carbon. What is the theoretical yield of iron metal?
2 Fe2O3 + 3 C --> 4 Fe + 3 CO2

If 14.5 grams of iron are recovered when the reaction is complete, what is the percent yield?


**Both answer should be written as XX.X

Answers

Answer:

Theoretical yield = 16.76 g

Percent yield = 87%

Explanation:

Given data:

Mass of iron oxide = 23.5 g

Theoretical yield of iron = ?

Actual yield of iron = 14.5 g

Percent yield of iron = ?

Solution:

Chemical equation:

2Fe₂O₃ + 3C     →  4Fe + 3CO₂

Number of moles of iron oxide:

Number of moles = mass/molar mass

Number of moles = 23.5 g/ 159.69 g/mol

Number of moles = 0.15 mol

Now we will compare the mole of iron oxide with iron metal.

                      Fe₂O₃         :            Fe

                         2              :              4

                      0.15            :          4/2×0.15 = 0.3

Mass of iron:

Mass = number of moles × molar mass

Mass = 0.3 mol × 55.85 g/mol

Mass = 16.76 g

Percent yield:

percent yield = (actual yield / theoretical yield)× 100

Percent yield = (14.5 g / 16.76 g) × 100

Percent yield = 0.87 × 100

Percent yield = 87%

Answer:

I tried the answer above and it’s correct

Explanation:

How many molecules/atoms of excess reactant will remain after the reaction is complete?

Answers

Answer:

Once you have identified the limiting reactant, you calculate how much of the other reactant it must have reacted with and subtract from the original amount.

Explanation:

 1.  Write the chemical equation.

   2.Calculate the moles of product from the first reactant.

   3.Calculate the moles of product from the second reactant.

   4.Identify the limiting reactant and the excess reactant.

   5.Calculate the mass of excess reactant used up.

   6.Calculate the mass of unused excess reactant.

   7.Calculate the mass of limiting reactant needed to react with the unused excess reactant.

(b) A atom T has atomic number 11 and mass number 23. How many (I) protons does it have?​

Answers

Answer:

There are 11 protons in an atom T.

Explanation:

In chemistry, the scientific word for proton is also known as atomic number so the proton number will be 11.

Answer:

11

Explanation:

what is an example of natural material for fabric?

Answers

Maybe cotton if that is what u are asking?

Plzzzzzzzz help Which species is a index fossil

Answers

Answer:

e

Explanation:

it's in the index fossil range

Answer:

Explanation:

In marine strata, index fossils that are commonly used include the single-celled Protista with hard body parts and larger forms such as ammonoids. In terrestrial sediments of the Cenozoic Era, which began about 65.5 million years ago, mammals are widely used to date deposits.

Identify a metal from the following
(1) Sulphur
(2) Boron
(3) Silicon
(4) Sodium

Answers

Answer:

sodium

Explanation:

it is an alkali metal

The most abundant element in the universe
(1) Hydrogen
(2) Oxygen
(3) Nitrogen
(4) Helium

Answers

hydrogen is the answer

Answer:

Hydrogen

Explanation:

Hydrogen is universe's most simple element, which is most likely why it is the most abundant.

(02.05 LC)
Which type of heat transfer takes place when objects touch each other? (3 points)
A Conduction

B Convection

C Radiation

D Temperature

Answers

Answer: That is Conduction

Explanation:

:)

Conduction

reason: Conduction is the transfer of heat through contact between items.

(Brainliest, please?)

if a star were 36 trillion miles from the earth it would be about ___ light years from the earth​

Answers

Answer:

6.12light years

Explanation:

Given parameters:

Distance of star from earth  = 36 trillion miles

Unknown:

Distance in light years  = ?

Solution:

A light year is the distance light travels in one year.

  1 mile  = 1.7 x 10⁻¹³ light years

 36 trillion miles  = 36 x 10¹² x 1.7 x 10⁻¹³ light years

                             = 6.12light years

The technology in the picture produces which energy conversion?
O A. Chemical energy to kinetic energy
O B. Kinetic energy to electrical energy
O c. Thermal energy to kinetic energy
D. Light energy to electrical energy

Answers

Answer:

Its D. Light energy to to electrical energy

Explanation:

Answer:

D. Light energy to electrical energy

Explanation:

its lowkey obvious lol

The tundra is characterized by _____.

extremely cold temperatures
high rainfall
long growing seasons
high temperatures

Answers

extremely cold temperatures

Answer:

Tundra are cold bioms. They include poler bears wolfs rabbits etc

Explanation:

What element has 4 energy levels and 8 valence electrons?

Answers

Noble gasses I’m pretty sure

The element having 8 valence electrons and 4 energy levels is krypton, (Kr)  it is a noble gas included in 18th group.

What is krypton?

Krypton is 36th element in periodic table with main shell electronic configuration, K= 2, L= 8, M= 18 and N= 8 where, K, L, M and N are energy levels.

Krypton is in the group noble gases also called inert gases. The group members of Kr are, Helium, argon and xenon. Thus krypton is the element with 4 energy levels and 8 valence electrons.

To know more about Kr, refer the link below:

https://brainly.com/question/14535867

#SPJ5

Write the group number using both A/B and 1-18 notation for elements that have the
following outer electron configuration:
a 252
b. 3523p3
c. 4s23
d. 5524d105p4

Answers

shiekaka svzgsggajwkwlqmabwhehgeyeuejeksxnnxbxvsgsgwyehdndbxvshakwnw

Give a scenario in which a good conductor would come in handy.

Answers

Explanation:

Not sure if ment like an electric type that gives off energy but here is my answer. a good conductor comes off handy in every situation. meaning, without one a machine, or whatever the conductor is being used for could be unstable, or not be able to work perfectly. which would could lead to certain malfunctions. so a good conductor could also give you a better chance of succeeding.

What product(s) are formed during this chemical reaction? (Will be two answers)

B(NO3)3 + KBr rightwards arrow


K(Br)3


KNO3


Br3(NO3)2


K3NO4


B(NO3)K


B3K3


BBr3


BK

Answers

Answer:

BK. BK. BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK

1. Salt has the chemical formula NaCl because it is made up of atoms of Sodium (Na) and Chlorine (CI).
Which statement most accurately describes this compound in relation to the elements it is made of?
A. When sodium and chlorine chemically combine they create a substance with completely different
properties
B. Salt has similar properties to the sodium and chlorine it is made of
C. Once salt is formed the sodium and chlorine atoms no longer exist, only salt atoms
D. Salt can easily be separated back into sodium and chlorine atoms through physical means

Answers

Answer:

A

Explanation:

When Na atom chemically combine with with Cl atom to form NaCl both atoms loose their chemical properties due to the fact that Na atom transfer an electron to cl atom. after transfer of electron Na atom become Na ion (cation) and Cl atom become Cl ion (anion)


With your class, look up the element names for each symbol in the word "BOOK" and list the element names.

Answers

Explanation:

The word BOOK; is made up of 4 letters and each actually represents the symbol of an element.

An element is a distinct substance that cannot be split-up into simpler substances.

  B    -   Boron

  O    - Oxygen

  O   - Oxygen

  K   - Potassium

We can see that the word BOOK shows us elements boron, oxygen, oxygen and potassium.

I need some help with this

Answers

newton’s first law of motion is also known as the law of inertia

What happens to light waves as they enter the Earth's atmosphere?

Answers

Light waves slow down as they enter the Earth's atmosphere from space. Light waves slow down as they enter and then speed back up once they reach Earth.

The specific heat of a certain type of metal is 0.128 J/(g⋅∘C). What was the intial temperature if 0.305 kJ of heat is added to 94.8 g of metal to reach a temperature of 85.0 ∘C?

Answers

The intial temperature : 59.865 °C

Further explanation

Heat added :

Q = m . c . ΔT

Q = heat, J  

m = mass, g  

c = specific heat, joules / g ° C  

∆T = temperature difference, ° C / K  

[tex]\tt 305=94.8\times 0.128\times (85-t_1)\\\\85-t_1=25.135\\\\t_1=59.865^oC[/tex]

please help I need to ace this test
When two atoms attach to each other by sharing electrons it is called a...

A: Covalent bond

B: Ionic bond

C: none of these - atoms can't bond to each other.

D: Nuclear bond

2nd question
Two hydrogen atoms bonded together form a compound
A: True
B: False

3rd question
Water is two hydrogen atoms bonded to an oxygen atom. This is an example of a compound

A: True

B: False
like I said I need help on this and I don't wanna fail

Answers

#1: A covalent bond

#2 False

#3True

2. Al(OH),(s) + 3 HCl(aq) à 3 H2O(l) + AlCl3(aq). This reaction shows how aluminum hydroxide
in antacid tablets neutralizes hydrochloric acid in the stomach. A tablet containing 0.25 g of
aluminum hydroxide is ingested by a patient with 0.88 g of hydrochloric acid in their stomach. Is
this tablet sufficient to neutralize the acid in the patient's stomach? Explain using stoichiometric
calculations. [4 marks]
I

Answers

This tablet insufficient to neutralize the acid in the patient's stomach

Further explanation

Reaction

Al(OH)₃(s) + 3HCl(aq) ⇒ 3 H₂O(l) + AlCl₃(aq)

0.25 g of  Aluminum hydroxide-Al(OH)₃ , mol (MW=78 g/mol) :

[tex]\tt \dfrac{0.25}{78}=0.00321[/tex]

mol HCl : mol Al(OH)₃ = 3 : 1

[tex]\tt mol~HCl=3\times 0.00321=0.00963[/tex]

mass HCl (MW=36,46 g/mol) :

[tex]\tt 0.00963\times 36.46=0.351[/tex]

0.351 < 0.88⇒this tablet insufficient to neutralize the acid

You are doing math homework and get frustrated and throw the 7 kg book with a force of 47
Newtons. How much acceleration will the book have when you throw it?

Answers

Answer:

The answer is 6.71 m/s²

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

[tex]a = \frac{f}{m} \\ [/tex]

f is the force

m is the mass

From the question we have

[tex]a = \frac{47}{7} \\ = 6.714285...[/tex]

We have the final answer as

6.71 m/s²

Hope this helps you

Dalton thought that the atoms of each element were the same. We
now know that elements can have different atoms, for example,
chlorine has two different atoms, 35Cl and 7 C.
What name is given to different types of atom of the same element?

Answers

Answer:

molecule

Explanation:

A molecule is formed from two or more atoms

Which of the following produces a chemical change?
nge?
O A. Sanding a plank of wood
O B. Grilling a piece of meat
O C. Drying a towel on a clothesline
O D. Pressing clay into a ball
please help ASAP i’m literally struggling

Answers

Answer:

B. Grilling a piece of meat

since the process involves burning

There are several different models that represent compounds. One type of model is shown.

3 C's connected in a line by 2 black lines. The first and third C's each have 3 H's connected to them by a single black line each. The middle C has 2 H's connected to it by a single black line each.
What type of model is shown?

Answers

A) structural formula

On edge

Answer:

A

Explanation:

Which of these ions has the correct charge?



O2-


B2+


P2-


Li2+

Answers

Answer:

02- i think your welcome hope it helps

Calculate the molecular mass of the following mass of the following chemical compound
C6H12O6

24 G/mol
180 gmol
155 g/mol
19 g/mol

Answers

Answer:

132g/mol

Explanation:

Given compound:

   C₆H₁₂O₆

Molecular mass of the compound.

 This is the sum of the atomic masses of the given elements in the compound;

  C = 12

  H  = 12

  O = 6

Molecular mass = 6(12) + 12(1) + 6(16) = 180g/mol

what process creates deltas?

Answers

Explanation:

A delta is a process that forms by river deposition into an ocean or marine environment.

Sediments carried by rivers in their old stage are brought near the mouth of an ocean. As the velocity of the river reduces, sediments begins to settle out. Small river tributaries breaks out into the ocean. Delta forms at an interphase between a small and large body of water. The deposited sediments forms distinct shapes as they enter the larger body of water.

2 of 4
+ Automatic Zoom
10. The molar mass of CS2 is 76.14 g/mol. How many grams of CS2 are present in 10.00 mol?

Answers

Answer: C

Explanation:

There are 761.4 grams of CS2 in 10.00 mol.

To calculate the amount of grams present in a given amount of moles, the molar mass of the substance must be used, as follows:

                                        [tex]m = MM \times mol[/tex]

In this way, just perform the following operation:

                           

                                          [tex]m = 76.14 \times 10[/tex]

                                         [tex]m = 761.4 grams[/tex]

Thus, there are 761.4 grams of CS2 in 10 mol of the substance.

Learn more about mole calculation in: brainly.com/question/15693285

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