Answer:
Ores mined from shields.
Explanation:
Ores mined from shields are the source from which we get the history of Precambrian rocks. The Ores from shield experience the Precambrian era so that's why its rocks provides information about that era. The Precambrian supereon is the division of the geological time scale which is the first and longest stage in the history of the Earth which also includes the Hádic, Archaic and Proterozoic eons.
what is atom
what is atom
Answer:
An atom is a chemical substance which exist freely in nature without any reaction .
What do you think are the products of cellular respiration? *
Answer:
Cellular respiration uses oxygen in addition to glucose. It releases carbon dioxide and water as waste products. Cellular respiration actually "burns" glucose for energy.
Explanation:
Why is it important for scientists to use the scientific method?
Answer:
The scientific method attempts to minimize the influence of bias or prejudice in the experimenter. Even the best-intentioned scientists can't escape bias. ... That's the job of the scientific method. It provides an objective, standardized approach to conducting experiments and, in doing so, improves their results.
Answer:
to get used to them
Explanation:
you have to practice them so that they can get into your head
What happens to a catalyst in a reaction?
Question 1 options:
a)
It is incorporated into the products.
b)
It remains unused.
c)
It is incorporated into the reactants.
d)
It evaporates.
Answer:
it's eveporates remains unused products
[tex]\huge{ \mathcal{ \underline{ Answer }\: \: ✓ }}[/tex]
Catalyst are substance that are added to a reaction in order to speed of the reaction.
And they remain the same before and after the reaction, hence the correct option is :
B. It remains unused.
__________________________
[tex]\mathrm{ ☠ \: TeeNForeveR \: ☠}[/tex]
Whatt happens to water when its heated from 0 °C to 4 °C?
Answer:
molecules gain energ and start to move quickly
Water has highest density at 4∘C. This changes its properties from other simple fluids. When water is heated from 0∘C to 4∘C, the volume of liquid decreases. Thus for this transition, P ΔV is negative.
PLEASE HELP!
The specific heat of octane, C8H18(l), is 2.22 J/(g⋅K).
How much heat is needed to raise the temperature of 76.0 g of octane from 10.6 ∘C to 26.0 ∘C?
Express your answer in joules to three significant figures.
Answer:
Q = 2.60 • [tex]10^{3}[/tex] J
Explanation:
Our specific heat capacity equation is:
Q = mC∆T
Q is the energy in joules.
m is the mass of the substance.
∆T is the temperature chance.
Let's plug in what we know.
We have 76.0 g of octaneThe specific heat capacity of octane is 2.22 J/(g•K)The temperature increases from 10.6º to 26.0º (a 15.4º increase)Q = 76.0(2.22)(15.4)
Multiply.
Q = 2598.288
We want three significant figures.
Q = 2.60 • [tex]10^{3}[/tex]
or
Q = 2590 J
Hope this helps!
Answer:6,985.008
Explanation:
so the hear formula is mass times specific heat times change in temperature (kelvin) so what i did was got the change in temperature (41.4 K) and multiplied that times 2.22 J/(g•K)and multiplied that by 76 grams of Octane to get the Answer (not in scientific notation)
Balance this chemical equation
C4H8 + O2 --> CO2 + H2O
Answer:
you're going to start by balancing the carbon first. To do this, you want to times the carbon on the right by 4 so we put a 4 in front of the CO2.C4H8 + O2 --> 4CO2 + H2OWe're now going to try and balance the hydrogen by putting a 4 in front of the H2O.C4H8 + O2 --> 4CO2 +4H2OThen we're going to count the oxygens on both side and balance them by putting a 6 in front of the O2.C4H8 + 6O2 --> 4CO2 + 4H2O
Answer:
hope this helps :) please correct me if I'm wrong.
C4H8 + 6O2 --> 4CO2 + 4H2O.
Explanation:
C4H8 + O2 --> CO2 + H2O
C=4 C=1
H=8 H=1
O=2 ---> O=3
C4H8 + 6O2 --> 4CO2 + 4H2O
C=4 C=4
H=8 H=8
O=12 ---> O=12
Five hundred feet is the same as how many meters?
(PLEASE HELP)
Analyzing the pros and cons of a decision can help you make a difficult choice. Which of the following is a pro associated with the use of hydropower as an energy source?
A. A large amount of energy can be released by a small amount of fuel.
B. The use of hydropower produces environmentally friendly waste products.
C. Hydropower is a renewable energy source.
D. The chemical reactions involved remove harmful substances from the air.
Please please help meeee! I will give brainliest
Answer:
The carbons on either side of the double bond are pointed in the same direction
Two water molecules are weakly attracted to each other when a slightly positive hydrogen atom in the first molecule is attracted to the slightly negative oxygen atom on the second molecule. What type of bond is this
Which products are the same in both the copper carbonate and the calcium carbonate reactions shown above
Answer:
The common product is H2CO3
Explanation:
Complete question
Which products are the same in both the copper carbonate and the calcium carbonate if they react with hydrochloric acid in different reactions?
Solution
Reaction of copper carbonate and hydrochloric acid is as follows
CuCO3 + 2 HCl --> CuCl2 + H2CO3
Reaction of calcium carbonate and hydrochloric acid is as follows
CaCO3 + 2HCl --> CaCl2 + H2CO3
The common product is H2CO3
How can I solve this?
Explanation:
option d
hope helps u
have a nice day
How many moles are found in a 350.mL solution of 13.5M HNO3
Answer: Moles are found in a 350.mL solution of 13.5M [tex]HNO_{3}[/tex] are 4.725 mol.
Explanation:
Given: Volume = 350 mL (1 mL = 0.001 L) = 0.350 L
Molarity = 13.5 M
Molarity is the number of moles of a substance present in a liter of solution.
Therefore, moles of [tex]HNO_{3}[/tex] present in the given solution are calculated as follows.
[tex]Molarity = \frac{moles}{Volume (in L)}\\13.5 M = \frac{moles}{0.350 L}\\moles = 4.725 mol[/tex]
Thus, we can conclude that moles found in a 350.mL solution of 13.5M [tex]HNO_{3}[/tex] are 4.725 mol.
What does a nucleus look like
Answer:
Explanation:
The nucleus is an organelle found in eukaryotic cells. Inside its fully enclosed nuclear membrane, it contains the majority of the cell's genetic material. This material is organized as DNA molecules, along with a variety of proteins, to form chromosomes.
During chemical reactions, in general, the rate of reactions decreases when temperature increases:
1) yes
2) no
Answer:
b the same like this page provide the best way to go with it the hell are nutrients to
Explanation:
bush administration of jute bags and purses and then a good day to day basis and then we will have the same IP Android app and wanted to let you know that I am a
why do some chemical reactions will not generate products?
Answer:
Some chemical reactions will not generate products is because the molecules in a chemical reaction aren´t able to line up with each other correctly.
Explanation:
Answer:
The reason that a chemical reaction doesn't happen is that the molecules weren't able to line up with each other correctly. It's the same as you extending your right hand and your friend extending his right hand at the same time.
Explanation:
Which describes a concept that was not previously known but was developed as a direct result of Mendel’s experiments with pea plants?
Organisms with a recessive trait can have a dominant allele for the trait.
All observable traits are dominant.
Organisms have more than one observable trait.
Organisms can be bred for specific traits based on a pattern of inheritance.
Answer:
Organisms with a recessive trait can have a dominant allele for the trait.
Explanation:
hope this helps
Answer
D
Organisms can be bred for specific traits based on a pattern of inheritance.
Most of the electricity that is used in everyday life comes from________ current.
Fill in the blank
Answer:
electric is your answer :)
Explanation:
Edge STEM instruction/assignment perhaps???
Answer:
A. C (alternate current)
ATOMS: MULTIPLE CHOICE
Answer:
Double bonds. It says I have to write more words lol but yeah it's double bonds
URGENT!!
which has the largest London dispersion force out of the ones listed
Formulas for the compounds below.
Sulfur Trioxide
Sodium hydroxide
Sulphur Trioxide = So3
Sodium Hydroxide = NaoH
Answer:
[tex]\huge\boxed{Sulfur \ Trioxide\hookleftarrow}[/tex]
✐ SO3[tex]\huge\boxed{Sodium \ Hydroxide\hookleftarrow}[/tex]
✐ NaOHʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ
# ꧁❣ RainbowSalt2²2² ࿐
La presión de vapor del agua pura a 25 oC es 24,56 mmHg y la de agua de mar es 23,99 mmHg, y si suponemos que el agua de mar sólo contiene cloruro de sodio, calcula su concentración molal.
Answer:
1.32m es la concentración de NaCl en el agua de mar
Explanation:
La disminución de presión de vapor sigue la ecuación:
P = XP⁰
Donde P es la presión de la solución = 23.99mmHg
X es la fracción molar del solvente
P⁰ la presión del agua pura = 24.56mmhg
23.99mmHg = X*24.56mmhg
0.97679 = X
La fracción molar del solvente se define como:
Moles Solvente / (Moles soluto + Moles solvente)
Asumiendo que las moles de soluto = NaCl = 1:
0.97679 = Moles solvente / (1 + Moles solvente)
0.97679 + 0.97679 Moles solvente = Moles solvente
0.97679 = 0.02321 moles solvente
42 moles solvente = 42 moles de agua.
masa de agua:
42 moles * (18.01g / mol) =758g de agua = 0.758kg
Molalidad, m, son las moles de soluto (1mol NaCl) por kg de solvente (0.758kg):
1mol / 0.758kg =
1.32m es la concentración de NaCl en el agua de marWhat reacts with the hydrocarbon fuel in a combustion reaction? small words, please
Hydrocarbon combustion refers to the chemical reaction where a hydrocarbon reacts with oxygen to create carbon dioxide, water, and heat.
#small words#What is the iupac name of CH3-O-CH2-CH2-CH3?
Answer:
The iupac name of CH3-O-CH2-CH2-CH3 is Methoxybutane.
One of your classmates asks you why an ice cube melts in water. Which of the following
would be your best explanation?
a.) The ice cube transfers energy to the air.
b.) The ice cube transfers energy to the water.
c.) Energy is transferred from the ice to the water and from the water to the ice.
d.) The water transfers energy to the ice cube.
Answer:
the answer is B
Explanation:
the ice puts 8ts cold into the water taking it away from the ice
When copper (II) chloride reacts with sodium nitrate, NaNO3, copper (II) nitrate, Cu(NO3)2, and sodium chloride are formed. Write a balanced chemical equation for this reaction. Then determine how much sodium chloride can be formed when 15.0 grams of copper (II) chloride react with 20.0 grams of sodium nitrate.
Answer:
CuCl2 + 2NaNO3 → Cu(NO3)2 + 2NaCl
Explanation:
m(NaCl) =m(CuCI2) × 2Mr(NaCl) / Mr(CuCI2)
= 15 × 2 × (94/135)
=20.89 g
Indicate what reaction is happening at the anode, and for the reaction below, which species would be the anode? Sn(s) + 2 Ag⁺(aq) → Sn2+(aq) + 2 Ag(s)
Answer:
Sn --> Sn2+ + 2e-
Explanation:
At anode oxidation reaction occur. In this reaction Sn is getting oxidized to state +2 while Ag is reduced from +1 to 0.
Hence, reaction at anode will be
Sn (s) --> Sn2+ (aq) + 2e-
At cathode the following reaction occur
2 Ag⁺ + 2e- ---> 2Ag (s)
What is indicated by the methyl-prefix?
Answer:
The molecule is a branched hydrocarbon.
Explanation:
The methyl prefix indicate the presence of a single carbon or the molecule is a branched hydrocarbon.
Prefix in IUPAC NomenclatureThe Prefix is used to show or indicate the substituents, side chains of the molecule and prefix attached to the beginning of a word and the molecules name is based on the number of carbon atoms in IUPAC nomenclature. The International Union of Pure and Applied Chemistry (IUPAC).
For Example:
Number of carbon Atoms Root Name Prefix (side group)
1 meth- methyl-
2 eth- ethyl-
3 prop- propyl-
4 but- butyl-
5 pent- pentyl-
6 hex- hexyl-
7 hept- heptyl-
Thus, we can say that prefix tells us the number of carbon atoms in each molecule. A presence of single carbon is indicated by the methyl prefix or we can also say that the molecule is branched hydrocarbon.
Learn more about the IUPAC nomenclature here: https://brainly.com/question/16903179
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Pick the MAIN output form of energy.
A snail eating a carrot so the snail has energy to move.
Electrical Kinetic Energy
Motion Kinetic Energy
Chemical Potential Energy
Thermal Kinetic Energy
Motion Potential Energy
Nuclear Potential Energy
Answer:
Chemical Potential Ener