Answer:
15.75 J
Explanation:
Potential energy
= mgh
= 3,500 g × 10 m/s² × 0.45 meters
= 3.5 kg × 4.5 m²/s²
= 15.75 J
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.
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Reactivity, flammability, and the ability to rust are types of _________.
phase changes
reversible changes
physical changes
chemical properties
Answer:
chemical properties
Explanation:
so EZ
someone help me please i need to finish this
the answer is D hope it helps :)
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
What is the word "love" really mean to someone? when do you know when the time is right
The penalty for not voting in New South Wales is a $55 fine. You must respond within 28 days of the issue date of the notice. You will have four options: If you voted, you can provide details of where and when using our non-voter self-service portal.
5. How many total atoms are in one molecule of NH3?
4 atoms
1 atom
2 atoms
3 atoms
Answer:
4 or 3 atoms; leaning towards 4 more
Explanation:
Answer:
3 atoms
Explanation:
Which of the following atoms would be expected to be diamagnetic in the ground state?
O magnesium (Mg)
O potassiun (K)
O chlorine (CI)
O cobalt (Co)
The atoms that would be expected to be diamagnetic in the ground state is magnesium
The magnetism of an atom refers to its electronic configuration. A diamagnetic atom is an atom whose electrons are all paired.
A paired electron is an electron that occurs in pairs in its orbital shell.
At their respective ground state, the electronic configuration of the given elements are as follows:
The electronic configuration of magnesium is 1s²2s²2p⁶3s². As such its a diamagnetic atom.
The electronic configuration of Potassium is 1s²2s²2p⁶3s²3p⁶4s¹. Hence, Potassium has one unpaired electron in its outermost shell.
The electronic configuration of Chlorine is 1s²2s²2p⁶3s²3p⁵. Hence, Chlorine has one unpaired electron in its outermost shell.
The electronic configuration of Cobalt is 1s²2s²2p⁶3s²3p⁶3d⁷4s². Hence, the unpaired electrons of Cobalt in its outermost shell are three.
Therefore, the atoms that are diamagnetic in the ground state is magnesium.
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Given the reaction below, how many grams of Li3N can be formed from 6.07 g of Li? Assume an excess of nitrogen.
6 Li(s) + N2(g) → 2 Li3N(s)
Answer:
About 10.2 g Li₃N.
Explanation:
We are given the reaction:
[tex]\displaystyle \text{6 Li(s) + N$_2$(g) }\longrightarrow \text{2 Li$_3$N(s)}[/tex]
And we want to determine the amount of Li₃N that can be formed from 6.07 g of Li and an excess of nitrogen.
To convert from g Li to g Li₃N, we can: (1) convert from g Li to mol Li, (2) mol Li to mol Li₃N, and (3) mol Li₃N to g Li₃N.
The molecular weight of Li is 6.94 g/mol. From the equation, six moles of Li yields two moles of Li₃N. And the molecular weight of Li₃N is 34.83 g/mol as shown below.Molecular weight of Li₃N:
[tex]\displaystyle \begin{aligned}\text{MW}_\text{Li$_3$N} & = (3 (6.94) + 14.01) \text{ g/mol} \\ \\ & =34.83\text{ g/mol} \end{aligned}[/tex]
This yields three ratios:
[tex]\displaystyle \frac{1 \text{ mol Li}}{6.94 \text{ g Li}}, \frac{2 \text{ mol Li$_3$N}}{6 \text{ mol Li}}, \text{ and } \frac{34.83 \text{ g Li$_3$N}}{1 \text{ mol Li$_3$N}}[/tex]
From the initial value, multiply:
[tex]\displaystyle 6.07 \text{ g Li} \cdot \frac{ 1 \text{ mol Li}}{6.94 \text{ g Li}} \cdot \frac{2 \text{ mol Li$_3$N}}{6 \text{ mol Li}} \cdot \frac{34.83 \text{ g Li$_3$N}}{1 \text{ mol Li$_3$N}} = 10.2\text{ g Li$_3$N}[/tex]
In conclusion, 10.2 g of Li₃N is formed from 6.07 g of Li and an excess of nitrogen.
Why do you think some seasons are more likely than others to experience a tornado
Why can’t we reach “absolute zero”?
Scientists believe the Earth's inner core to be solid. This is probably due to extremes in:
pressure
depth
density
temperature
Previous
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
¿Qué son las fuerzas intramoleculares?
Respuesta:
Las fuerzas intermoleculares que actúan entre las moléculas se clasifican en : Dipolos permanentes. Dipolos inducidos. Dipolos dispersos.
Explicación:
Dentro de una molécula, los átomos están unidos mediante fuerzas intramoleculares (enlaces iónicos, metálicos o covalentes, principalmente). Estas son las fuerzas que se deben vencer para que se produzca un cambio químico. Son estas fuerzas, por tanto, las que determinan las propiedades químicas de las sustancias.
Sin embargo existen otras fuerzas intermoleculares que actúan sobre distintas moléculas o iones y que hacen que éstos se atraigan o se repelan. Estas fuerzas son las que determinan las propiedades físicas de las sustancias como, por ejemplo, el estado de agregación, el punto de fusión y de ebullición, la solubilidad, la tensión superficial, la densidad, etc.
Calculate the mass of 3.4 x10^16 atoms of aluminum
Answer:
1.5232 × 10^-6 grams
Explanation:
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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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.
The element that is in the same family as element C (gas) is likely to have which properties. 2 valence electrons, solid, metal 6 valence electrons, gas, nonmetal, 6 valence electrons, solid, nonmetal, 2 valence electrons, solid, nonmetal
Answer:
that element is likely to be a non metaland a gas
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.
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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
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
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 :)
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What does Newton's first law of motion state?
Every action has an equal and opposite reaction.
A body at rest will stay at rest until it is acted upon by another object.
The amount of force acting on an object is equal to its mass times its acceleration.
All objects that have mass attract each other with a force that depends on their mass.
Answer:
B. A body at rest will stay at rest until it is acted upon by another object
Explanation:
Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
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
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.
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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.
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.
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.
How many grams of liquid water can be heated by 8920 joules through a change in temperature of 30K?
Answer:
One of water's most significant properties is that it takes a lot of energy to heat it. Precisely, water has to absorb 4,184 Joules of heat (1 calorie) for the temperature of one kilogram of water to increase 1°C. For comparison sake, it only takes 385 Joules of heat to raise 1 kilogram of copper 1°C.
Explanation:
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
2567 milliliters to liters
Answer:
2.567 litres
Explanation:
I dont have a proper explanation sorry
