Answer:
Option e is correct
The heat required to increase the temperature of copper metal by 1 degree is 0.754 j .
Explanation:
Given data:
specific heat of copper = 0.377 j/g.°C
Heat required to increase temperature = ?
Mass of copper = 2.00 g
Change in temperature = 1°C
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
Q = m.c. ΔT
Q = 2 g× 0.377 j/g.°C × 1°C
Q = 0.754 j
The heat required to increase the temperature of copper metal by 1 degree is 0.754 j .
7. Who was the first explorer from France to reach North America? A. Giovanni da Verrazano C. Louis Joliet B. Jacques Cartier D. Samuel de Champlain
Which combination of solid plus liquid indicates a chemical change has taken place?
es =))
A)
solid + liquid A
B)
solid + liquid B
C)
solid + liquid
D)
solid + liquid D
Answer:
It's D
Explanation:
Trust
What is a job of the skeletal system? 1. exchange oxygen and carbon dioxide 2. deliver nutrients to the body 3. remove waste 4. protect organs
Answer:
4 protect organs
Explanation:
this would be in biology category btw
Answer:
4.protect organs
Explanation:
your ribs protect your heart and lungs
A graduated cylinder( approximate as a regular cylinder) has a radius of 1. 045 cm and a high of 30.48 cm. what is the volume of the cylinder centimeter 3( use 3.141 for ) round to the nearest tenths
Given parameters:
Radius of cylinder = 1.045cm
Height of cylinder = 30.48cm
Unknown:
Volume of the cylinder = ?
A cylinder is a solid body. The volume is usually calculated using the mathematical expression below;
Volume of cylinder = π r² h
π = 3.141
r = radius of cylinder
h = height of cylinder
Now, input the parameters and solve;
Volume of cylinder = 3.141 x 1.045² x 30.48
= 104.547cm³
To the nearest tenth gives 104.5cm³
The volume of the cylinder is 104.5cm³
Jamal is working with three ionic compounds: sodium chloride, calcium sulfide, and barium oxide. His teacher asks him which are the positive ions in each compound. What should Jamal’s answer be? sodium, calcium, and barium barium, sulfur, and oxygen calcium, barium, and chlorine chlorine, sulfur, and oxygen
Answer:
option A is correct ( sodium, calcium and barium)
Explanation:
Given compounds:
Sodium chloride , calcium sulfide, barium oxide
We know that metals form positive ions. In order to solve the problem we must identify the metals from given compounds.
Na⁺Cl⁻
Ca²⁺S²⁻
Ba²⁺O²⁻
We can see that sodium, calcium and barium contain positive charges.
Thus option A is correct.
Because sodium have one valance electron. When it combine with chlorine sodium lose its one electron to complete the octet and chlorine accept it to complete its octet. Thus sodium form positive ion and chlorine form negative ion.
Similarly barium and calcium are present in group 2. Both have two valance electron. When they lose them cation are formed.
Other option are incorrect because,
Option B have sulfur and oxygen which are anion.
Option C have chlorine which is also anion
Option D have chlorine, sulfur and oxygen that are anions.
Answer:
option A is correct ( sodium, calcium and barium)
Explanation:
-If the pH of the blood is lower than normal, explain how the kidneys attempt to raise
the pH of the blood.
Please help also could u put explanation
Answer:
11.6 N/KgExplanation:
[tex]a = \frac{force}{mass} = \frac{3750}{150} = 11.66 [/tex]
The unit of the answer is N/KgDuring which method of separation is one of the components of the mixture lost
What type of mixture can be separated by distillation?
Distillation. Distillation is an effective method to separate mixtures comprised of two or more pure liquids. Distillation is a purification process where the components of a liquid mixture are vaporized and then condensed and isolated.
Answer:
D. evaporation
Explanation:
I did the test on edge :)
What is the mass in grams of 5.9 mol C8H 18
Answer:
Explanation:
The molar mass of
C
8
H
18
=
8
⋅
12
+
18
⋅
1
=
114g mol
−
1
So the mass of
5.90 mole C
8
H
18
will be:
5.90
mol C
8
H
18
×
114
g C
8
H
18
1
mol C
8
H
18
=
673 g C
8
H
18
rounded to three significant figures
Solid,liquid,gas how do they differ in how easily they change shape
Answer:Solid,Liquid,Gas differ from each other by the following ways:-
Solid:It have defined shape.
Liquid:They have an indefinite shape.
Gas:They have no shape:
where is ultraviolet waves located on the electromagnetic spectrum in relation to other kinds of radiation
What is the formula to describe the speed of light?
Answer:
Explanation:
Refer the image
What is the total number of atoms in the formula (NH4)3PO4?
A gas mixture at 0°C and 1.0atm contains 0.010mol of H2, 0.015mol of O2, and 0.025mol of N2. Assuming ideal behavior, what is the partial pressure of hydrogen gas (H2) in the mixture?
A. About 0.010atm, because there is 0.010mol of H2 in the sample.
B. About 0.050atm, because there is 0.050mol of gases at 0°C and 1.0atm.
C. About 0.20atm, because H2 comprises 20% of the total number of moles of gas.
D. About 0.40atm, because the mole ratio of H2:O2:N2 is 0.4:0.6:1.
Answer:
PH₂ = 0.2 atm
C) About 0.20atm, because H2 comprises 20% of the total number of moles of gas.
Explanation:
To determine the partial pressure of hydrogen gas (H2) in the mixture,
Partial pressure H₂ = Ptotal * xH₂
xH₂ = Mole fraction of H₂ = ∩H₂ / ( ∩H₂ + ∩O₂ + ∩N₂)
xH₂ = 0.01 / (0.01 + 0.015 + 0.025)
xH₂ = 0.01/0.05
xH₂ = 0.2
therefore
PH₂ = pT * xH₂
PH₂ = 1.0 atm * 0.2
PH₂ = 0.2 atm
so the correct option is C) About 0.20atm, because H2 comprises 20% of the total number of moles of gas.
The correct answer to the question is Option C. About 0.20 atm, because H₂ comprises 20% of the total number of moles of gas.
We'll begin by calculating the mole fraction of Hydrogen (H₂) in the mixture.
Mole of Hydrogen (H₂) = 0.01 mole
Mole of Oxygen (O₂) = 0.015 mole
Mole of Nitrogen (N₂) = 0.025 mole
Total mole = 0.01 + 0.015 + 0.025 = 0.05 mole
Mole fraction of Hydrogen (H₂) =?Mole fraction = mole of gas / total mole
Mole fraction of Hydrogen (H₂) = 0.01 / 0.05
Mole fraction of Hydrogen (H₂) = 0.2NOTE: The mole fraction of Hydrogen, H₂ (i.e 0.2) in the mixture is exactly 20%.
Finally, we shall determine the partial pressure of Hydrogen, H₂. This can be obtained as follow:
Mole fraction of Hydrogen (H₂) = 0.2
Total pressure = 1 atm
Partial pressure of Hydrogen (H₂) =?Partial pressure = mole fraction × total pressure
Partial pressure of Hydrogen (H₂) = 0.2 × 1
Partial pressure of Hydrogen (H₂) = 0.2 atmFrom the calculations made above, we can see that the correct answer to the question is:
Option C. About 0.20 atm, because H₂ comprises 20% of the total number of moles of gas.
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The following mechanism has been proposed for the gas-phase reaction of chloroform (CHCl3) and chlorine:
Step 1: Cl2(g)⇌2Cl(g)(fast)
Step 2: Cl(g)+CHCl3(g)→HCl(g)+CCl3(g)(slow)
Step 3: Cl(g)+CCl3(g)→CCl4(fast)
Part A
What is the overall reaction?
Express your answer as a chemical equation. Identify all of the phases in your answer.
Part B
What are the intermediates in the mechanism?
Express your answers as a chemical expression. If there is more then one answer, separate them by commas. Identify all of the phases in your answer.
Part G
What is the rate law predicted by this mechanism? (Hint: The overall reaction order is not an integer.)
Use a for [Cl2], b for [Cl], c for [CHCl3], d for [HCl], e for [CCl3] and k for the rate constant.
Answer:
Overall reaction equation is:
Cl2(g) + CHCl3(g) --> HCl(g) + CCl4(g)
The intermediates are Cl(g), CCl3(g).
Rate law= ka^1/2 c
Explanation:
This reaction is a non elementary reaction. A non elementary reaction is one that does not take place in a single reactive encounter. In other words, the reaction is comprised of many steps.
The overall reaction equation is the sum of all the reaction steps after all intermediates have been cancelled out. The rate law is obtained from the slowest step in the reaction sequence.
ILL MARK BRAILIEST PLEASE HELP
During the Industrial Revolution, society shifted to fossil fuels. True or False
The answer is true because during the industrial revolution is when factories became ran buy machines and used fossil fuels to run.
How many grams are in 0.0664 mol of sodium
Answer:
1.5272 grams
Explanation:
We know that the mass of a given amount of an element is number of moles multiplied by the molar mass of the element
Molar mass of Sodium = 23 g/mol
Mass of sodium = Moles of Sodium * Molar mass of sodium
Mass of Sodium = 0.0664 * 23
Mass of Sodium in 0.0664 moles = 1.5272 grams
How many electrons are in O2-?
Answer:
There will be 16 electrons in O2-
For each obstacle, select the best solution. failing the classes needed to graduate from college: not being able to save enough money to pay for medical school: failing the state licensing exam:
Answer:
(A) getting study help, and retaking classes or exams
(A) applying for a loan
(C) getting study help, and retaking the exam
Explanation:
Which of these best describes the basis on which new scientific ideas are accepted or rejected?
A. Moral and ethical beliefs
B. Popular support
C. Carefully collected and analyzed data
D. Historical support
:I believe it’s C but not sure , lmk
Moral and ethical beliefs best describes the basis on which new scientific ideas are accepted or rejected.
what is scientific idea ?A scientific experiment is an investigation involves in the process of manipulating an independent variable in order to be able to determine the dependent variable means the effect.
The experiment can be used by scientists to demonstrate how a condition causes or gives rise to another i.e cause and effect, influence, behavior, etc in a sample.
A scientific method is typically use the experimental and mathematical techniques which comprises a series of steps such as systematic observation, measurement, and analysis to formulate, test and modify a hypothesis.
A hypothesis is considered to be tentative and it can be defined as a testable explanation for an observation
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An atom of sodium and an atom of flourine will combine to form sodium flouride. Which of the following correctly describes sodium flouride?
Group of answer choices
A. an element
B. energy
C. an atom
Answer:
A compound
Explanation:
A compound is formed when two elements combine together. Both sodium and fluorine are elements. These elements combine via the process of chemical bonding.
In this case, an ionic bond is formed between sodium and fluorine, this leads to the emergence of the compound sodium chloride, hence the answer above.
Look at the periodic table. Why can’t you find water (H2O), table salt (NaCl), or rust (Fe2O3) on the periodic table?
Explanation:
The periodic table is a list of elements which are arranged by their atomic number.
Water, table salt and rust are not elements. They are compounds which contains more than one element in them. For such compounds, we cannot use the atomic number to easily categorize them.
This is why the periodic table shows the symbol of each individual element. And the arrangement is based on the atomic number.CAN SOMEONE PLEASE HELP ME WITH MY CHEMISTRY ASSIGNMENT.
Answer:
yes its correct
Explanation:
Do Neutros and Protons affect the element?
Answer:
Protons identify the element and add to the mass of the element. The mass of a proton is about 1. Neutrons keep the nucleus (the place where neutrons and protons are) together. they also add to the mass The mass of a neutron is also about 1
Explanation:
____ Are subatomic particles found in the nucleus and carry positive electrical charge.
A. Atoms
B. Electrons
C. Protons
D. Neutrons
E. Electron Shell
Answer:
C
Explanation:
there's no need to rush just calm down baby!!!
An important rule for students to know when heating a test tube is to
A) place a cork in the mouth of the test tube.
B) point the mouth of the test tube away from others.
C) hold the test tube loosely with the fingertips.
D) shake the test tube forcefully to keep contents mixed.
Answer:
B .point the test tube away from others
Explanation:
Well in science your supposed to keep it away from you and others so the aroma doesnt harm your nose or anyone eles´s nose
Hoped I helped -\
Sleepy~
If an atom of element A has a mass of 2 units, while an atom of element B has a mass of 5 units, what would be the ratio of element A to element B in a compound that had a mass of 11 units?
An atom of element A has a mass of 2 units, while an atom of element B has a mass of 5 units, the ratio of element A to element B in a compound that had a mass of 11 units is 3:1
What are atom?Atom are defined as smallest unit into which matter can be divided without the release of electrically charged particles.
It can also be defined as the building blocks of matter and were created after big bang theory.
Mass are defined as quantitative measure of inertia, fundamental property of all matter.
Elements are defined as a pure substance consisting of only one type of atom which all has the same numbers of protons in their nuclei.
As ratio of element A to element B is given then the ratio will be 3:1
Thus, an atom of element A has a mass of 2 units, while an atom of element B has a mass of 5 units, the ratio of element A to element B in a compound that had a mass of 11 units is 3:1
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Starting with O; in inhaled air, describe in your own words the sequence of gas
movements from the inhalation of oxygen to the exhalation of carbon dioxide.
Answer:
We inhale oxygen through our nasal pasage and mouth, it passes epiglottis which leads air down to the lungs. It travels down the windpipe into right and left bronchi. Around alveoli (small air filled sacks) tiny capillaries bring blood to exchange gases. Oxygen moves from the lungs into the bloodstream and carbon dioxide moves from the bloodstream into the lungs where we exhale back from our mouth
Isotopes,ions,and atoms worksheet 2 answer key
Explanation:
Isotopes are defined as atoms of the same element but differ in the number of neutrons in their nucleus where a number of protons and electrons remain the same.Ions are defined as chemical species of an atom with an electrical charge.IO with a positive charge are called cations, and ions with a negative charge are called anions.Atom has three subatomic particles: protons, electrons, neutronsAtomic number (Z)= Number of protonsNumber proton = Number of electrons (isoelectric neutral atom)Atomic mass (A)= Number of protons + Number of neutronsThe chemical symbol of an element X is written as:[tex]^A_ZX^C[/tex]
Where : Charge on ion = C
Learn more about atomic mass and the atomic number here:
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Name each compound....
Answer:
1. chlorine ion 2. methylene
Explanation:
I think #2 is right. i'm not sure.
