Answer:
b
Explanation:
edge 2022
An unknown mass of each of the following substances, initially at 23.0 ∘C , absorbs 1940 J of heat. The final temperature is recorded as indicated. Find the mass of each substance. Pyrex glass (final temp:55.4 C)
The mass of the Pyrex glass that absorbs 1940J of energy is 79.52grams.
How to calculate mass?The mass in a calorimetry procedure can be calculated using the following formula:
Q = mc∆T
Where;
Q = quantity of heat absorbed or releasedm = mass of substancec = specific heat capacity = 0.753Jg/°C∆T = change in temperatureAccording to this question, an unknown mass of each of the following substances, initially at 23.0∘C , absorbs 1940 J of heat. The final temperature is recorded as indicated. The mass can be calculated as follows:
1940 = m × 0.753 × (55.4°C - 23.0°C)
1940 = 24.39m
m = 79.52grams.
Therefore, 79.52grams is the mass of the pyrex glass.
Learn more about mass at: https://brainly.com/question/28992424
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Air is made up of different gases, such as oxygen, nitrogen, and carbon dioxide.
Which statement best describes these three components of air?
O Oxygen, nitrogen, and carbon dioxide are all classified as pure substances.
Oxygen, nitrogen, and carbon dioxide cannot react with another substance.
Oxygen, nitrogen, and carbon dioxide are chemically bonded to one another.
O Oxygen, nitrogen, and carbon dioxide can be classified as elements.
idio
Answer:
option A
Explanation:
hope it helps
Darrell has 35 grams of melted chocolate. He pours all of the melted chocolate in molds. After he allows them to cool, Darrell has two solid bars of chocolate.
If the two solid chocolate bars contain all of the melted chocolate, what is their combined weight?
A.
It depends on how long it took the chocolate to cool.
B.
The chocolate bars weigh more than 35 grams.
C.
The chocolate bars weigh exactly 35 grams.
D.
The chocolate bars weigh less than 35 grams.
Answer:
A
Explanation:
it is correctly right????
Answer:
B.
The chocolate bars weigh more than 35 grams.
Which electron transition would result in the emission
of energy?
A) 3s to 4s
B) 3p to 4p
C) 3s to 3p
D) 4p to 4s
HELP PLEASE!!
Answer:
When the electron transits from an excited state to its lower energy state, it will gice off the same amound of energy needed to raise to that level. This emitted energy is a photon.
The answer is C, 3s to 3p.
help MEEEEE!!!!!!!!!!!
Answer:
Equation
Mark as brainlist
Answer:
equation
Explanation:
chemical changes can be shown in an equation/reaction because you can see products and reactants.
Please give me brainliest
someone help me please i need to finish this
the answer is D hope it helps :)
Scientists believe the Earth's inner core to be solid. This is probably due to extremes in:
pressure
depth
density
temperature
Previous
Zn + O2= ZnO
How many moles of zinc are needed to make 500. g of zinc oxide?
Answer:
5.15 moles
Explanation:
2zn + o2 = 2zno
5.15 2.57 5.15 moles
nzno=500/(16x2+65)= 5.15 moles
-> nzn = 5.15 x 2 ÷ 2 = 5.15 moles
hello there
looking for some help here,
Liquid A has a mass of 80 grams and a volume of 10 ml. What is liquid A's density?
1: 1.25 g/ml
2: 800 g/ml
3: 8 g/ml
4: 80 grams
Si a un resorte se le cuelga una masa de 800 g y se deforma 50 cm. ¿Cuál será el valor de su constante en N/m? (g = 9.81m/s2).
Answer:
50cm
Explanation:
because thats the only thing i got
Measuring the volume of air near 100°C
Answer:
[tex]1m ^ {3}[/tex]
Explanation:
UwU
exchanges gases ( O2 and CO2) between the air and the blood
Answer:
Explanation: Hankins is waiting
What type of policy does the Federal Reserve use to boast a slow growing economy?
Answer:
Tight monetary policy is an action undertaken by a central bank such as the Federal Reserve to slow down overheated economic growth. Central banks engage in tight monetary policy when an economy is accelerating too quickly or inflation—overall prices—is rising too fast.
urgent help! will mark as brainliest
Answer:
1. Negative
2. positive alpha
3. Gold
4. deflected
5. center
6. positive
7. positive
8. center
Hope this helps :)
Modeling Nuclear Processes Quick Check
1 of 51 of 5 Items
Question
Which phrase best describes nuclear fusion?(1 point)
the process by which small nuclei combine into a larger nucleus
the process by which small nuclei combine into a larger nucleus
the process by which a large nucleus is divided into smaller nuclei
the process by which a large nucleus is divided into smaller nuclei
the spontaneous emission of radiation from an unstable nucleus
the spontaneous emission of radiation from an unstable nucleus
a series of reactions in which particles from one reaction trigger the next reaction
The phrase which best describes nuclear fusion is: A. the process by which small nuclei combine into a larger nucleus.
A nuclear reaction can be defined as a type of chemical reaction in which the nucleus of an atom of a radioactive chemical element is transformed by either being joined (fusion) or split (fission) with the nucleus of another atom of a radioactive chemical element and accompanied by a release of energy.
Generally, there are two (2) main types of nuclear reaction and these include:
Nuclear fission: it involves the collision of a heavy atomic nucleus with a neutron, thereby causing a split and release of energy.Nuclear fusion: it involves the joining of two smaller nuclei of atoms to form a single massive or heavier (larger) nucleus with the release of energy.In conclusion, nuclear fusion is best described as the process by which small nuclei combine into a larger nucleus, accompanied by a release of energy.
Read more: https://brainly.com/question/24040465
HELP!! fill in the blank using the word bank please (picture attached).
Which unit represents speed?
Joules
kilometers per second
miles per hour
newtons
(Pick ONE)
Answer:
1
Explanation:
Answer:
can be SI or also know miles per second.
Is each ion stable? Explain.
Answer:
By satisfying the duet rule or the octet rule, ions are more stable.
Explanation:
Ionic bonds are formed through the exchange of valence electrons between atoms, typically a metal and a nonmetal. The loss or gain of valence electrons allows ions to obey the octet rule and become more stable.
The octet rule states that an atom is most stable when there are eight electrons in its valence shell. Atoms with less than eight electrons tend to satisfy the duet rule, having two electrons in their valence shell. By satisfying the duet rule or the octet rule, ions are more stable.
I HOPE THIS HELPS!!!!
5. How many total atoms are in one molecule of NH3?
4 atoms
1 atom
2 atoms
3 atoms
Answer:
4 or 3 atoms; leaning towards 4 more
Explanation:
Answer:
3 atoms
Explanation:
Calculate the mass of 3.4 x10^16 atoms of aluminum
Answer:
1.5232 × 10^-6 grams
Explanation:
Reactivity, flammability, and the ability to rust are types of _________.
phase changes
reversible changes
physical changes
chemical properties
Answer:
chemical properties
Explanation:
so EZ
1. Which of the following is neutrally charged?
c. an electron
b. a compound d. a proton
a. an ion
d. a proton
Answer:
B. A compound
Explanation:
An ion is defined as a charged particle, so it's not going to be that. Ions can be positively or negatively charged.
Electrons are tiny particles, smaller than an atom, that revolve around the nucleus. They have a negative charge. So they are not neutral either
Protons are also a part of atoms, like electrons are. An atom is neutral overall. This is because protons have a positive charge that balances out the negative charge of electrons.
So, the only answer option we have left is for a compound. So, that's our answer!
Answer:
c. an electron
Explanation:
A neutral charge is the electrochemical occurrence where an atom has an equal number of electrons and protons. Such an atom is neither positively charged nor negatively charged because the protons and electrons balance each other out
Which of the following atoms would be expected to be diamagnetic in the ground state?
O magnesium (Mg)
O potassiun (K)
O chlorine (CI)
O cobalt (Co)
The atoms that would be expected to be diamagnetic in the ground state is magnesium
The magnetism of an atom refers to its electronic configuration. A diamagnetic atom is an atom whose electrons are all paired.
A paired electron is an electron that occurs in pairs in its orbital shell.
At their respective ground state, the electronic configuration of the given elements are as follows:
The electronic configuration of magnesium is 1s²2s²2p⁶3s². As such its a diamagnetic atom.
The electronic configuration of Potassium is 1s²2s²2p⁶3s²3p⁶4s¹. Hence, Potassium has one unpaired electron in its outermost shell.
The electronic configuration of Chlorine is 1s²2s²2p⁶3s²3p⁵. Hence, Chlorine has one unpaired electron in its outermost shell.
The electronic configuration of Cobalt is 1s²2s²2p⁶3s²3p⁶3d⁷4s². Hence, the unpaired electrons of Cobalt in its outermost shell are three.
Therefore, the atoms that are diamagnetic in the ground state is magnesium.
Learn more about diamagnetic atoms here:
https://brainly.com/question/18865305?referrer=searchResults
defintion for concentration
Answer:
concentration is the abundance of a constituent divided by the total volume of a mixture.
Explanation:
hope this helps <33
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and also can i have brainliest plz? :D
Why can’t we reach “absolute zero”?
if 0.400 moles CO and 0.400 moles O2 completely react how many grams of CO2 are produces?
2CO+O2 becomes 2CO2
If 0.400 moles CO and 0.400 moles O2 completely react, 17.604 grams of CO2 would be produced.
First, let us look at the balanced equation of reaction:
[tex]2CO + O_2 ---> 2CO_2[/tex]
According to the equation, the mole ratio of CO and O2 is 2:1. But in reality, the mole ratio supplied is 1:1. Thus, CO is the limiting reactant while O2 is in excess.
Also from the equation, the ratio of CO consumed to that of CO2 produced is 1:1. Thus, 0.400 moles of CO2 would also be produced from 0.400 moles of CO.
Recall that: mole = mass/molar mass
Therefore, the mass in grams of CO2 that would be produced from 0.400 moles can be calculated as:
Mass = mole x molar mass
= 0.400 x 44.01
= 17.604 grams
More on calculating mass from number of moles can be found here: https://brainly.com/question/12513822
what is a compound substance
Answer:
A compound is a substance that contains atoms of two or more different elements.
Explanation:
Please mark my answer no. 1
A measure of how much substance is packed into a space
A) Density
B) Mass divided by volume
C) Water
D) Element
Answer:
a
Explanation:
Answer:
A
Explanation:
Density is the amount of space that atoms are compacted in a substance.Apr 25, 2017
At this location, it is summer in the Northern Hemisphere because the North Pole is tilted
Away from the sun
Towards the sun
Answer:
This happens twice a year during Earth's orbit. Near June 21 the north pole is tilted 23.5 degrees toward our Sun and the northern hemisphere experiences summer solstice, the longest day of the northern hemisphere year.
...
Do other planets have seasons?
Uranus
30,589
97.8
Spring Equinox* 2050
Summer Solstice*
points toward the sun.
closer the earth is to the sun the more hot it will be the closer it is to summer,
you can see at D northern hemisphere is closest to sun and the north pole is pointing toward the sun.
What is the answer with the proper significant figures 7.6+2.401+0.68=
Answer:
10.7
Explanation:
The addition of 7.6 + 2.401 + 0.68 = is 10.681.
According to the addition of sig figs, you want your answer to have the same amount of places, after the decimal point, as the least sig-fig figure.
7.6
2.401
0.68
+
----------
10.681 - Draw a line straight down from the least sig-fig figure (7.6)
So the maximum figure after the decimal point is one. Since 8 is greater than 5, you have to round up from 10.6 to 10.7.
