Answer:
Mass = 2.77 g
Explanation:
Given data:
Mass of HCl = 2 g
Mass of CaCl₂ produced = ?
Solution:
Chemical equation:
2HCl + Ca → CaCl₂ + H₂
Number of moles of HCl:
Number of moles = mass / molar mass
Number of moles = 2 g/ 36.5 g/mol
Number of moles = 0.05 mol
now we will compare the moles of HCl with CaCl₂.
HCl : CaCl₂
2 : 1
0.05 : 1/2×0.05 = 0.025 mol
Mass of CaCl₂:
Mass = number of moles × molar mass
Mass = 0.025 mol × 110.98 g/mol
Mass = 2.77 g
plzz help guyss I'm so confused
Starting from rest, you reach a speed of 20 m/s in 4 seconds. What is your acceleration?
Which property of water makes it a good choice for use in heat exchangers? Choose the correct answer.
A)high entropy
B)low entropy
C)low specific heat
D)high specific heat
Answer:
The correct answer is D)high specific heat
Explanation:
The specific heat indicates the amount of heat required to raise the temperature of a substance in 1 unit of temperature. The specific heat of water is around 4.18 J/g.°C. That means that 1 gram of water is able to retain a high amount of heat (4.18 J) when the temperature is raised to 1°C. Compared with other substances, this specific heat capacity is higher. Thus, water is a good choice for use in a heat exchanger.
what the answer. the correct answer
Answer:
F, Cl, Br, I because all elements found in group 7 which is halogen.
Answer:
F, Cl, Br, I
Explanation:
Because theyre all in the same family. :)
3. Determine the uses of the following materials:
(b) Bronze (c) Sulphur
ed
(d) Iodine
(a) Brass
Answer:
D
Explanation:
D
Part C
Why do you use the same amount of baking soda and same amount of liquid for each combination?
Answer:
because you might have a too much bigger than explosion if you add more baking soda or vinegar
Explanation:
You use the same amount of baking soda and the same amount of liquid for each combination for the explosion.
We know that,
When you use the same amount of baking soda and the same amount of liquid for each combination then be get the explosion.
Baking soda and liquid are base and acid so they react chemically.
Here, the given liquid is vinegar
If you will increase the amount of baking soda and if you will increase the amount of liquid then no reaction
So, you use the same amount of baking soda and the same amount of liquid for each combination for the explosion.
Reference:
https://brainly.com/question/22409111
How does sexual reproduction increase the chance of a population's survival?
A. Offspring are produced in greater numbers
B. Offspring are produced in a shorter amount of time
C. Sexual reproduction produces offspring in both plants and animals
D. Sexual reproduction produces more genetically diverse offsprings
C? i think, the rest just isnt right. i wouldve thought there was an answer that would say "it provides us with more organisms" but the closest one to that is C
Answer:
D
Explanation:
the more genetic variation in a population the better their chances are to survive
What element am I if I have 6 protons and
8 neutrons?
Answer:
The element you would have is Carbon-14.
Explanation:
Carbon-14 has 6 protons and 8 neutrons. To find the atomic mass, you add the protons to the neutrons, so the atomic mass of Carbon-14 is 14.
#teamtrees #WAP (Water And Plant)
Which has a greater momentum: cheetah with a mass of about 74 kg and a running speed of up to 31 m/s, or an elephant with a mass of 7000 kg running at 18 km/hr?
help im gonna diee....*^*
Answer:
i say the elephant
Explanation: mainly because its heavier!
3. The Periodic Law states that the chemical
properties of elements are periodic functions of
their
A) density
C) atomic number
E) atomic radius
B) atomic mass
D) isotopic weight
I think it's C
Atomic number
Once we use up all the nonrenewable Energy sources they cannot be replenished.
O True
O False
Answer:
true
Explanation:
it says none renewable so you can't reuse it
Answer:
false
Explanation:
becuase nonrenewable means it can not be replenished
Now that you know the molar mass of the
empirical formula, you can divide it into the molar
mass of your compound to find the scaling factor.
What is the scaling factor if the molar mass of
this compound, having an empirical formula of
CH20, is 150 g/mor?
The molecular formula C₅H₁₀O₅ and The scaling factor =5
Further explanationGiven
Molar mass = 150 g/mol
The empirical formula = CH₂O
Required
The scaling factor
Solution
The empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
(empirical formula) n = molecular formula
n = the scaling factor
(CH₂O)ₙ=150 g/mol
(12+2+16)ₙ=150
(30)ₙ=150
n=5
The molecular formula : C₅H₁₀O₅
What is the best way to measure the age of the Earth and why? Explain how scientists do this.
Explanation:
the best way to understand the age of the earth is to estimate the age of matirials in it
What is the % Oxygen in or the compound Cobalt V Carbonate? Co2(CO3)5
The % Oxygen in the compound Cobalt V Carbonate : 57.42%
Further explanationGiven
Compound Cobalt V Carbonate- Co₂(CO₃)₅
Required
% composition of Oxygen
Solution
Number of Oxygen in Co₂(CO₃)₅ = 3 x 5 = 15
Molar mass of Cobalt V Carbonate- Co₂(CO₃)₅ :
=2.Ar Co + 5.Ar C+15. Ar O
=2.59 + 5.12 + 15.16
= 118+60+240
=418 g/mol
% Oxygen = (15.Ar O / MW Co₂(CO₃)₅) x 100%
% Oxygen = (240/418) x 1005
% Oxygen = 57.42
When the sun shines and heats something, that energy is called-
Answer:
Solar energy.
Answer:
All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the electromagnetic radiation spectrum.
4. Which statement is true?
a. A prokaryote has a nucleus
b. Antibiotics kill eukaryotes
c. Prokaryotes are nonliving
d. Eukaryotes have membrane-bound organelles
Answer:
d
Explanation:
Hope this helps and have a great day!!!
What is CO??????????
how many calories are in water
Answer:
none
Explanation:
Answer:
Calories
Explanation:
Depends on what type of water your drinking, for example, flavored water has calories but original water has 0 calories.
Hope this helped!
3
The chemical formula NHCl indicates that the formula contains -
A 1 nitrogen atom, 1 hydrogen atom, and 1 chlorine atom
B 1 nitrogen atom, 4 hydrogen atoms, and 4 chlorine atoms
Ci nitrogen atom, 4 hydrogen atoms, and 1 chlorine atom
D 4 nitrogen atoms, 4 hydrogen atoms, and 1 chlorine atom
The formula contains : C. 1 nitrogen atom, 4 hydrogen atoms, and 1 chlorine atom
Further explanationGiven
NH₄Cl compound
Required
The number of atoms
Solution
The empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
A molecular formula is composed of two or more elements formed of the same or different types.
A subscript indicating the number of atoms forming a molecule
So for NH₄Cl , there are 3 different elements, N, H and Cl, and the number is shown from the subscript
N : 1 atomH : 4 atomsCl : 1 atom
Which of the following best explains the role of heat and pressure in the rock cycle?
a. The molten rocks solidify by this process.
b. The sediments are deposited by this process.
c. They change the mineral composition of rocks.
d. They transport sediments from one place to another.
Answer:
is there a all of above if not then a i would say
Explanation:
Explain when and why parentheses are necessary when writing chemical formulas that include
polyatomic ions. Provide an example with your explanation. Make sure to discuss how removing the
parentheses from your example would change the readers understanding of the formula.
Answer:
- the 2 in this formula is called the subscript. It refers only to the element preceding it. In this case the F (fluorine).
- in some chemical formulas it is necessary to use parentheses. The subscript outside the parentheses refers to all the elements inside the parentheses. In this example there are: one Al (aluminum), three N (nitrogen), and nine O (oxygen).
- the 3 in this formula is called the coefficient. It refers to each element that follows. In this case there would be 3 Ba (barium) and 3 F2 (a total of 6 fluorine).
Explanation:
What region of the periodic table contain atoms that form covalent bonds?
A. Right side
B. Bottom left side
C. Middle
D. Top left side
Answer:
A. the right side
Explanation:
Taking into account the definition of covalent bond, the correct answer is option A.) right side of the periodic table contain atoms that form covalent bonds.
The covalent bond is the chemical bond between atoms where electrons are shared, forming a molecule. Covalent bonds are established between non-metallic elements. These elements have many electrons in their outermost level (valence electrons) and have a tendency to gain electrons to acquire the stability of the electronic structure of noble gas. The shared electron pair is common to the two atoms and holds them together.
In other words, a covalent bond is a force that joins two atoms of non-metallic elements to form a molecule. Atoms share pairs of electrons from their valence shell to achieve the stability of the molecule formed. The tendency of the elements to reach a stable configuration is known as the octet rule.
Finally, since the nonmetallic elements are found on the right side of the periodic table, the correct answer is option A.) right side of the periodic table contain atoms that form covalent bonds.
Learn more:
https://brainly.com/question/9921593?referrer=searchResultshttps://brainly.com/question/12661797?referrer=searchResultshttps://brainly.com/question/10777799?referrer=searchResultshttps://brainly.com/question/12663276?referrer=searchResultsAcid rain can be destructive to both the natural environment and human-made structures. The equation below shows a reaction that occurs that may lead to the formation of acid rain.
3NO2 + H2O Right arrow. 2HNO3 + NO
How many moles (precise to the nearest 0.01 mol) of nitric acid are produced from 300.00 mol of nitrogen dioxide?
Answer:
200.00 mol
Explanation:
Nitric acid: Nitrogen dioxide is 2:3
and nitrogen dioxide is already 300.00 mol so using the ratio, nitric acid is 200.00 mol
Answer:
200.00
Explanation:
Did it on edge GL
What's the billiard ball model?
Answer:
A ball, just a plane ball that is what dalton thought the atom looked like.
Explanation:
is this correct???PLZ HELP
William finds a piece of pure iron in his garden. After a few days, the iron begins to rust. What are the two types of substances involved in the rusting process of iron?
Iron is
an element
with one kind of atom that combines with oxygen from the air to form rust (iron oxide). Rust contains two types of atoms, which means it is
a compound
Answer:
It looks correct, yes.
Explanation:
Iron oxide are chemical compounds composed of iron and oxygen, which is known as rust.
Which statement is true regarding a catalyst?
A). A catalyst increases the activation energy for a chemical reaction.
b). A catalyst decreases the difference in energy for a chemical reaction.
c). A catalyst allows the reactants to start at a higher energy level.
d). A catalyst lowers the activation energy for a chemical reaction.
Answer:
d). A catalyst lowers the activation energy for a chemical reaction.
Explanation:
From the given choices, it is true that a catalyst lowers the activation energy for a chemical reaction.
The activation energy is the energy barrier that must be overcome before a chemical reaction can occur.
Some reactions have very high activation energy and would not occur without the introduction of a catalyst.
The catalyst brings the reactants into contact by removing the energy deficiency in the system.
Hello
can you help me out here!
1) They are a pipe like consisting of specialised cells. They transport substances and form a two way traffic in plants
a) Xylem tissue
b) phloem tissue
c) Root hair
d) Vascular tissue
Answer:
B
Explanation:
because Phloem tissue consists of a group of specialized cells. Sieve tubes are elongated tubular conducting channels of phloem through which food is transported. The contents of phloem can move in the upward as well as in the downward direction. Therefore, they form two-way traffic in plants.
Answer:
Phloem
Explanation:
Xylem transports water by action of trandpiriation pull, capillary action and root pressure. Phloem consists of sieve tubes and companion cells. The phloem is made of tubes and cells basically.
TIME REMAINING 52:03 Considering the activity series given below for metals and nonmetals, which reaction will occur?
Al > Mn > Zn > Cr > Fe > Cd > Co > Ni > Sn > Pb > H > Sb > Bi > Cu > Ag > Pd >Hg > Pt F > Cl > Br > I
2NaBr + I2 Right arrow. 2NaI + Br2
2Fe + Al2O3 Right arrow. 2Al + Fe2O3
2AgNO3 + Ni Right arrow. Ni(NO3)2 + 2Ag
Pb + Zn(C2H3O2)2 Right arrow. Zn + Pb(C2H3O2)2
Answer:
2NaBr + I2 Right arrow. 2NaI + Br2
2AgNO3 + Ni Right arrow. Ni(NO3)2 + 2Ag
Explanation:
The activity or electrochemical series is an arrangement of elements according to their order
of reactivity.
If we look at the reactions, one thing that we must note is that the reactions that can occur are those in which an element that is higher in the series displaces another element that is lower in the series.
Br is higher in the electrochemical series than I so it can displace it. Ni is higher than Ag in the electrochemical series hence it can displace it.
Answer: c
Explanation: Edge2021
How many atoms are represented in the molecular formula for the molecule
Heptane. C7H16
A. 7
B. 16
C. 23
D. 24
Answer:
7
Explanation:
Heptane is a hydrocarbon. There are 7 carbon atoms
Answer:
yea lol
Explanation:
duh
Alex's teacher showed him a model of gas particles in a sealed container. How should Alex change the model to show the particles of this gas at a higher temperature?
Answer:
Increased volume of particles in the containergreater vibration of particlesExplanation:
At higher temperature, the particles of the gas would be more active and vibrate more, or even have greater collisions. Alex can indicate this in the altered model to depict higher temperature.
Consequently, Charles law gives meaning to why there would be an increased volume of gas in the stable pressurized container, if the temperature were to be increased.
I hope this explanation was clear and concise?
Charlotte completed an experiment in which she investigated and discovered that an electrically charged object can attract an uncharged object without any contact. She used a PVC pipe and small pieces of paper for her experiment. Each time, she rubbed the PVC pipe with a cloth to give it a charge and then held it over paper. What would be Charlotte's control group in this experiment?
1. Using the cloth and rubbing it against the PVC pipe
2. Taking the pieces of paper and rubbing it against the cloth
3. Not rubbing the cloth against the PVC pipe or the paper
4. Rubbing the cloth against both the paper and the PVC pipe
Charlotte's control group in this experiment would be "Not rubbing the cloth against the PVC pipe or the paper." (C)
Answer:
C. Not rubbing the cloth against the PVC pipe or the paper
Explanation:
Hope this helped! :)
