First off, you cannot "build" an atom because doing so would throw the Law of Conservation of Matter out the window, and we don't want to do that.
However, I get what you're asking... 6 protons, 7 electrons and 7 neutrons would make carbon-13.
Cells can do three kinds of work: making proteins and polymers, transporting substances, and
A)
PΔV work to move a piston.
B)
energy work.
C)
mechanical work, such as contracting muscles.
D)
heat work.
Answer:
The correct answer is - option C. mechanical work, such as contracting muscles.
Explanation:
Cells perform three major work that can be categorized in chemical work, mechanical work, and transport work. Production of the large molecules is an example of chemical work.
The transport work includes transporting substances across the membrane such as moving the ions across a plasma membrane. Contraction of the muscles and the movements of cilia is mechanical work.
What type of reaction occurs when potassium iodide is combined with lead (II) nitrate?
A. single replacement
b. double replacement
c. synthesis
d. combustion
Answer:
double replacement occurs
HELPPPP!!!
Which element has the greatest atomic size?
a) Francium
b) Hydrogen
c) Rubidium
d) Sodium
Answer:
A. Francium
Explanation:
I'm not for sure but I believe this is correct. Hope it helps:)
W + BgCz2 --> WCz + Bg
Balance this equation
Answer: W + BgCz2 arrow WCz + Bg
2 W + BgCz2 arrow 2 WCz + Bg
Explanation:
Cz has 2 so you balcne the other side of WCz.
Since you Balcanes the Cz you changed the W and you Balcanes the other W on the left side.
NEED HELP ASAP!!! 20 POINTS!!
Which of the following is an exothermic reaction?
A) N2(g) + 2O2(g) → 2NO2(g) ∆H = +66.4 kJ
B) 2C(s) + H2(g) +227.4 → C2H2(g)
C) 4Al(s) + 3O2(g) → 2Al2O3(s) + 3351 kJ
D) N2(g) + O2(g) → 2NO(g) ∆H = +182.6
Answer:
exo means energy is released when delta h is + it is endo and when energy is on the reactants side that is energy introduced so endo as well so when energy shows up on the product side that is the exo one
so it is C as that E is listed as a product therefore released
Explanation:
_Al + _Fe(NO3)2 -->_Fe + __Al(NO3)3
2) You start with 3.8 x 1021 gold atoms, how many moles is this?
Answer:
0.0063mol
Explanation:
Number of moles (n) in a substance can be calculated by dividing the number of atoms (nA) of that substance by Avagadro's number i.e. 6.02 × 10^23. That is; n = nA ÷ 6.02 × 10^23
1 mol of Gold = 6.02 × 10^23 atoms
Therefore, 3.8 x 10^21 atoms of Gold will be;
3.8 x 10^21 ÷ 6.02 × 10^23
= 3.8 ÷ 6.02 × 10^ (21 - 23)
= 0.6312 × 10^-2
= 0.0063mol of Gold
Calculate the change in heat (Q) that occurs when 38.68grams of steam at 304°C cools to liquid water at 197°C. (cp = 4.184 J/g°C)
Answer:
Change in heat (Q) = -1.7316 x 10⁴
Explanation:
Given:
Mass m = 38.68 g
Change in temperature Δt = (197-304) = -107°C
Specific heat C = 4.184 J/g°C
Find:
Change in heat (Q)
Computation:
Change in heat (Q) = (C)(m)(Δt)
Change in heat (Q) = (4.184)(38.68)(-107)
Change in heat (Q) = -1.7316 x 10⁴
HELP PLEASE I BEG YOU
What is the name for Fe2(CO3)3?
Answer:
thing
Explanation:
always
Hockey is a sport in which players use hockey sticks to push a puck across smooth ice. At practice one day, three different-colored hockey pucks were sliding on the ice. The green hockey puck has less mass than the black and purple hockey pucks, which have the same mass. A player hit each hockey puck with a stick, but not from the same direction. Use the information in the diagram to answer.
Which puck(s) experienced the strongest force when hit? How do you know?
Answer:
The purple hockey puck; it takes a stronger force to slow down a more massive object than to speed it up.
Explanation:
Hope this helps! :) Plz mark as brainliest if u can!
The primary role of ATP is to _______ by transferring a phosphate group to a molecule and forming ADP.
A
provide energy for cellular work
B)
produce heat energy
C)
reduce the activation energy of a reaction
D)
take energy from cellular work
Answer:
A) provide energy for cellular work
Explanation:
The Adenosine triphosphate (ATP) molecule is the nucleotide known in biochemistry as the "molecular currency" of intracellular energy transfer; that is, ATP is able to store and transport chemical energy within cells. ATP also plays an important role in the synthesis of nucleic acids.
ATP always GIVES ENERGY
Which element is located in period 4?
Silicon (SI)
Iron (Fe)
Beryllium (Be) Zirconium (Zr)
Answer:
i beleive iron
Explanation:
please help as fast as u can
Answer:D
D
DDD
DDDDDDDDDD
Explanation:
Answer:
C. 1 and 3 only
Explanation:
In this element representation';
The superscript (23) s the mass number. Mass Number = Protons + Neutrons
-The subscript (11) is the atomic number.
Atomic Number = Protons
This means;
Number of Protons = 11
Number of Neutrons = 23 - 11 = 12
Number of electrons = 11 (Since it is a neutral atom)
Also sodium belongs to group 1 hence number of outer electrons = 1
The correct option is;
C. 1 and 3 only
What is the answer?
Answer:
Option A
Explanation:
The atomic number is the number of protons in the nucleus of an atom.
Identify the product(s) in the reaction below. 2H20 - 2H2 + O2 O
A. H₂O O
B. H20 and H2 O
C. H20 and 02 O
D. H2 and 02
H2 and 02 are the products of this chemical reaction because of the splitting of water molecule.
What are the products of this reaction?The products of this chemical reaction are H2 and 02 because when the water molecule dissociates or splits hydrogen and oxygen molecules are formed. We know that water is produced from the combination of hydrogen and oxygen.
So we can conclude that H2 and 02 are the products of this chemical reaction because of the splitting of water molecule.
Learn more about reaction here: https://brainly.com/question/26018275
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How many moles of steam are produced when 5.74 moles of octane (C8H18) react?
which factor prompts flowering in most plants?
In the list below, What were the likely ACID and BASE that react to form KCl?
HCl
H2SO4
Ca(OH)2
KOH
NaOH
HBr
Answer:
HCI and KOH
Explanation:
HCI + KOH >> H2O + KCI
Chemical equations consist of the chemical formulas of the reactants on the right
and the chemical formulas of the products on the left.
True
False
Which of the following masses is the greatest?
Answer:
4.2 gigagrams
Explanation:
kilo = 1,000
giga = 1,000,000,000
milli = .001
22
Which of the following statements about acids and alkalis is TRUE?
(1 Point)
ammonium hydroxide is alkaline due to the presence of OH+ ions
hydroxide ions make sodium hydroxide solution alkaline
O hydrochloric acid solution is acidic because it contains hydride ions
Answer:
''hydroxide ions make sodium hydroxide solution alkaline'' is true.
Explanation:
In the first sentence, OH+ ions is incorrect. It has to be OH- ions.
In the last sentence, hydride ions(H-ions) is incorrect. It has to be hydrogen ions(H+ ions).
TRUE OR FALSE?
Solvents are the component in solutions with highest percent composition
Answer:
True
Explanation:
I think this is a helpful for you
4. Salt and water are stirred together in a beaker. The solid salt particles seem to disappear
in the water. Which is the best explanation for the product that is formed?
A) A homogenous mixture has been created C) A compound has been created.
B) A heterogenous mixture has been created D) A new element has been
Answer:
I think C. A compound has been created
Number 2 plssssssssssssssssssssssssssssssss
Answer:
Its located on North America
what is change in science
Answer:
Scientific change is: "Any change in the scientific mosaic, i.e. a transition from one accepted theory to another or from one employed method to another. "
Explanation:
The formula for photosynthesis is shown.
64,0 + 600, → CH2+ 60,
What are the reactants of photosynthesis? (7.5A)
A.water and carbon dioxide
B.
oxygen and water
C.
glucose and oxygen
D.carbon dioxide and glucose
4. Calculate the mass of each element:
a) 3.25 mol of He
b) 0.0455 mol of Ni
c) 1.33 mol of K
c What mass of gas is present in
48 cm of oxygen. O2
Answer:
carbon dioxide
Explanation:
because we breath in oxygen and breath out Carbon
Calculate the volume which 1.00 mole of a gas occupies at STP.
Answer:
22.4 L
Explanation:
A gas at STP will possess the following;
Pressure (P) = 1 atm
Temperature (T) = 273K
General gas constant (R) = 0.0821 Latm/molK
Using the general gas law formula to calculate the volume a gas of 1 mol will contain;
PV = nRT
V = nRT/P
V = 1 × 0.0821 × 273 ÷ 1
V = 22.41/1
V = 22.4 litres