Answer:
2
Explanation:
Answer:
a
Explanation:
i just took it
How are molecules arranged in solid ,liquid and gas?
Answer:
A solid has the molecules tightly packed together and are held in a fixed pattern.
A liquid has molecules that are packed together in a random fashion and can move freely.
A gas has molecules that are widely separated and randomly move and collide.
Explanation:
PLEASE HELPPP ILL GIVE BRAINLIEST!!!!!!!!!!!!!
Answer:
it travels through the veins
Four different people are using sound wave technology. Which describe the form of technology most likely being used by each person?
Answer:
Its D
Explanation:
Ali is using a specialized headphone that cancels the extra noise in the atmosphere.
Megan is using a transmitter to convert electrical signals into radio waves.
Kristoff is using a microphone to convert sound waves into the electrical signals.
Jenna is using the radio to convert radio waves into sound waves.
Answer:
D. Ali is using specialized headphones, Megan is using a transmitter, Kristoff is using a microphone, and Jenna is using a radio.
Explanation:
25.0 g Fe2CO3 reacts with 20.0 g CO in the reaction below. What is the limiting reactant and what best explains why is this reactant limiting?
Fe2CO3 + CO --> 2Fe + 2CO2
Answer:
In a chemical reaction, reactants that are not used up when the reaction is finished are called excess reagents. The reagent that is completely used up or reacted is called the limiting reagent, because its quantity limits the amount of products formed. It represents a reaction of a metal and a diatomic gas chlorine.
If sperm and egg cells have half of the number of chromosomes found in other body cells, how do gametes form?
Please help asap i really need it
Answer:
decomposers
Explanation:
is it multiple choice
Water that falls from the clouds onto land could become ______ and travel to the ocean
A. Evaporation
B. Clouds
C. Condensation
D. Runoff
Answer:
runoff
Explanation:
...............................
Answer:
a.Evaporated
Explanation:
because water thet falls from the clouds into the land could become evaporation and travel to the ocean
what might be a formula for calculating distance
Answer:
Distance = speed * Time
hope it helps
Answer:
Distance formula (x2 - a1) ° + (y2 - Yı)?
d - d = distance
(x1, Y1) coordinates of the first point
(x2, Y2) = coordinates of the second point
When talking about the products of photosynthesis, why is it a HUGE issue when a vast amount of the rainforests is dying along with vast acres of forests from fires/deforestation? Remember, we know that this hurts the ecosystems of animals living there, but what else does it effect? Question 5 options: the creation of too much water the creation of oxygen the creation of to much heat the creation of carbon monoxide
Answer:d
Explanation:because im really really sure thats the answer
how much kg is equal to what g
Answer:
1kg= 1000 grams hope it helps
Which is the correct number of moles of NO that is produced from 13.2 moles of oxygen
gas, O2?
4NH3 + 502 —> 4N0 + 6H2O
10.6 mol NO
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[RxN - Balanced] 4NH₃ + 5O₂ → 4NO + 6H₂O
[Given] 13.2 mol O₂
Step 2: Identify Conversions
[RxN] 5 mol O₂ → 4 mol NO
Step 3: Stoich
[DA] Set up: [tex]\displaystyle 13.2 \ mol \ O_2(\frac{4 \ mol \ NO}{5 \ mol \ O_2})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 10.56 \ mol \ NO[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
10.56 mol NO ≈ 10.6 mol NO
Every ________ will have its own unique set of quantum numbers.
Select the correct answer below:
A. atom
B. shell of electrons
C.proton
D. individual electron
Answer:
D. individual electron
Explanation:
Every individual electron will have its own unique set of quantum numbers.
What are quantum numbers?
Quantum numbers are the numbers which describe the values of conserved quantities with respect to the dynamics of a quantum system.They correspond to the Eigen values of operators which commute with the Hamiltonian quantities.
The Hamiltonian quantities can be known with precision simultaneously with the system's energy.Quantum numbers can take values of discrete sets of integers or even half-integers even though they can approach infinity in some cases.
They can specifically describe energy levels of electrons, and can also explain angular momentum,spin,etc.These are used to describe the path of an electron in an atom ,when the quantum numbers of all atoms are combined they must comply with the Schrodinger equation.
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Iron has density 7.87 g/cm", which means that a
cube with side length 2.54 cm will have mass:
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
is there a better way to figure out the ratio of molecule types? What might that be?
The following equation is an example of a ______________ reaction. 2 NaCl + F2 → 2 NaF + Cl2 ?
Synthesis
Decomposition
Single replacement
Double replacement
Answer:
i think its single replacement
The monkeys at the zoo swing wildly from branch to branch.
Answer:
epic
Explanation:
hakuna matata
Please help it’s already overdue
Answer:
no se amigo esquema no entiendo ingles
how can u launch make the model spacecraft move without touching it
Answer:
How can the launcher make the model spacecraft move without even touching it? ...
Magnetic forces can attract or repel objects at a distance. ...
They explore attracting and repelling forces with magnets and with the simulation. ...
Magnetic forces can convert potential energy stored in the magnetic field to kinetic energy.
Explanation:
The launcher can launch the model spacecraft by exerting a magnetic force.
Magnetic force is a force just like gravity that can act across a distance without touching the object that is attracted by it. It should be noted that magnetic attraction is a pulling force.
Therefore, since the launcher wants to make the model spacecraft move without touching it, a magnetic force should be exerted on it. The magnetic force can act as the distance that's required for the objects to move.
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is there a relationship between the relative age of stars in the number/identity of element is found within them
Yes. Stars use fusion to create nuclear energy, which is what makes them "alive". The older they are, the "bigger" the element in them is. Hydrogen turns into Helium, and when hydrogen is used up, the helium starts fusing into bigger elements. it stops at iron however. Once stars start fusing silicon to iron, it is doomed because it takes more energy than it gives off.
What is the formula for CNHO
Answer:
this is basically structure of iso cyanic acid
37.5g of nitrogen reacts with 15.5 g of hydrogen. What mass of ammonia can be made? What is the limiting reactant?
Answer:
Limiting reactants or limiting reagents decide the amount of product formed and the amount of excess reagent used.
Which type of cell is associated with the statements below? Fill in the blank with either (voltaic cell, electrolytic cell, both).
Non-spontaneous reaction occurs:
Spontaneous reaction occurs:
Oxidation occurs at anode:
Electrolyte supports electron flow:
Answer:
Non-spontaneous reaction occurs: electrolytic cell.
Spontaneous reaction occurs: voltaic cell
Oxidation occurs at anode: both
Electrolyte supports electron flow: both
Explanation:
What is the total number of atoms in the molecule HNO3?
Answer:
We know that, composition of HNO3 is Hydrogen, Nitrogen and oxygen. Total number of atoms = 3+1+1=5 atoms are present in 1 molecule of HNO3.
CLAIM: What is one strategy animals use to take care of their offspring and to ensure successful reproduction? EVIDENCE: List two examples of animals that use this strategy. REASONING: Explain how this strategy increases the probability that offspring will survive.
Answer:
alligators protect their offspring by digging a hole where they bury their eggs and stay all the meanwhile on top of the hole protecting their offspring. baby alligators can be eaten by birds and snakes. they for short periods of time take a break to hunt for food. when their hatchling hatch they keep them in their mouth until they're in the water. alligators are good protecting their offspring.
seahorses make the males take care of their baby's till they are born and male seahorses join together in groups to help protect eachother. once the babies are born male seahorses are still together helping raise their pups
Alligators bury their eggs in a hole that they have dug, and they then spend the entire time on top of the hole guarding their young. Therefore, by below given ways animals take care of their offspring.
What is offspring?Offspring refers to the new organism that an organism creates via the act of reproduction. Both birds and snakes can consume young alligators. They stop for brief periods of time to go food hunting. They hold their hatchlings in their mouths until they are in the water after they hatch. Alligators do a superb job of safeguarding their young.
Male seahorses form groups to assist defend one another, and they are required to care for their young until they are born. Male seahorses continue to work together to nurture their young after the babies are born.
Therefore, by above ways animals take care of their offspring.
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In the lab, you are given a metal ball. You measure the mass of the ball to be 28 g. You place the ball in a graduated cylinder and the water level increases from 28.2 mL to 31.4 mL. What is the density of the metal ball? (round you answer to the nearest hundredth)
Answer:
Density = 8.75ml
Explanation:
Density = Mass / Volume
In this problem ...
Mass = 28 grams
Volume = 31.4ml - 28.2ml = 32ml (water displacement also)
∴Density = mass /volume = 28g/32ml = 8.75g/ml
Water's ________ specific heat makes it heat up and cool down slowly; this stability has helped water support life.
A) high
B) low
C) absence of
Answer:
high
Explanation:
Answer:(A)
Explanation:
What type of weathering creates a granite Tor?
Physical or
Chemical or
Biological
Answer:
Physical
Explanation:
Physical weathering is defined as the geological process in which rocks are broken down but there is no change in their chemical composition.
Granite tor are the rock masses above the ground surface which are associated with granites
Granite Tor is an example of physical weathering as they formed by freeze–thaw weathering. Granite tor are formed when magma present in the crust cools down and form batholith. Rocks above batholith gets erodes and left the batholith to expose.
Hence, the correct answer is "Physical weathering'.
For the rxn CaCo3(s)+2Hcl(aq)_CaCl(aq)+Ca2(g)+H2O(l)68.1 g solid CaCo3 is mixed with 51.6Hcl what number of grams of Co2 will be produced
Answer:
29.9 g of CO₂ will be produced by the reaction.
Explanation:
This is the reaction:
CaCO₃(s) + 2HCl (aq) → CaCl₂(aq) + CO₂(g) + H₂O(l)
First of all, we state the moles of each reactant:
68.1 g . 1mol/ 100.08g = 0.680 mol of carbonate
51.6 g . 1 mol/36.45g = 1.46 mol of acid.
The solid salt is the limiting reactant. Ratio is 2:1
2 moles of acid can react to 1 mol of salt
1.46 mol of acid may react with (1.46 . 1)/2 = 0.727 moles
As we only have 0.680 moles of salt, we do not have enough.
Let's work at the product side. Ratio is 1:1
1 mo of salt can produce 1 mol of gas
0.680 moles will produce 0.680 moles of gas
We convert the moles to mass → 0.680 mol . 44g / 1mol = 29.9 g of CO₂
The number of grams of Co2 should be produced is 29.9 g.
Calculation of the number of grams:Since
CaCO₃(s) + 2HCl (aq) → CaCl₂(aq) + CO₂(g) + H₂O(l)
So,
68.1 g . 1mol/ 100.08g = 0.680 mol of carbonate
51.6 g . 1 mol/36.45g = 1.46 mol of acid.
Now the ratio should be 2:1 for the solid salt
And, there is 2 moles of acid can react to 1 mol of salt
So,
1.46 mol of acid may react with (1.46 . 1)/2 = 0.727 moles
Now the product side the ratio is 1:1
So, that means
1 mo of salt can produce 1 mol of gas
So, the no of grams should be
= 0.680 mol . 44g / 1mol
= 29.9 g of CO₂
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A 4 feet tall student went summing pool. He saw depth of water in pool less than 4 feet.Will he drowned.Write reason
Answer:
Question says , the height of the student = 4 feet, ... This means, if the student goes for swimming in the pool, however he does not know swimming, he will not be drowned until he is suffering from an injury or external force.
A text book is on a desk. If the book weighs 14 N and the area of the book is 0.60 m 2 , what pressure is the book exerting on the desk?
Answer:
Explanation:
Pressure = Force / Area
F = 14 N
Area = 0.60 m^2
Pressure = 14/0.60
Pressure = 23.3 N
If you are worried about significant digits, the answer is 23
