Answer:
Luster
Explanation:
I can not really explain
-the metallic substance
Question 14
An element's periodic table identity is defined by its number of
А.
neutrons.
B
isotopes.
С C
electrons.
protons
Answer:
c
Explanation:
protons are the atomic number which define an element
Most of the elements on the Periodic Table are metals.
True
False
Answer:
the answer is true
Explanation:
I hope so it is helpful to u
Lily took 57 seconds to walk from classroom to library. If the distance between the classroom and library was 38 m, at what average speed did Lily walk in m/min?
___ m/min
20 POINTS!!
Kinetic and Potential Energy
Answer:
When a ball is rolled up a hill, it has potential energy that can turned into kinetic energy. The kinetic energy would be the ball rolling down the hill.
Explanation:
Hope this helps!
What is the condensation point and freezing point of neon in KELVIN.
Answer:
-415.5°F (-248.6°C)
Explanation:
Answer: The melting point/condensation point of neon is 24.53888889. Of course, I'm sure you can round that. The freezing point would be 521.74. All of this is in Kelvin
How much work is required to pull a sled if you use 60J of work in 5 seconds?
Answer:
DO I Look Like santa too you how am i supposed to know How about this how about you goo.gle the answer wow smart
Explanation:
A nitrogen molecule (N2) has one triple bond. How many electrons do the nitrogen atoms share?
A. 1
B. 3
C. 4
D. 6
Answer:
3 electrons
Explanation:
Help please When you are measuring your pulse (heart beats per minute) what system are you monitoring?
A. Digestive
B. Respiratory
C. Circulatory
D. Integumentary (skin)
In a lever,E×E.D.=L×__________
Answer:
LD is a answer okkkkkkkkkkkkkkkkk
. Classify each of the organisms in Figures 2 and 3 as
herbivore, carnivore, or omnivore. Explain your
classifications.
HELLLPPPP MEEEE PLEASE
Answer:
Herbivore, Omnivore & Carnivore
Explanation:
Herbivore they eat grass, Omnivores eat fruits and vegetables & Carnivores eat meat or flesh so that's why herb then omni and last carni bc so omni and herbi eat like the same thing
Answer:
Herbivore, Omnivore & Carnivore
Explanation:
1. Which of the following substances is believed to be responsible for the hole in the ozone
layer?
A. Ammonia
B. Chlorofluorocarbons (CFCs)
C. Lead
D. Carbon monoxide
Good day please help me thank you
Answer:
D Transportation it makes sence if it doesn't just re read it
DO ANY OF YALL KNOW THIS?????
1. Why do we need to use the mole to count atoms? (2pts)
2. What is the Molar mass of the following? Show your work
a. H2O2 (4pts)
b. C2H6 (4pts)
Answer:
1.mole allows us to weigh convenient amounts of material containing known numbers of atoms; i.e., it allows us to count atoms
2. H202 :34.0147 g/mol
C2H6: 30.07 g/mol
IF YOU ANSWER CORRECTLY U WILL RECIVE BRAINLEIST AND 10 pts! AsAp! thank youuu u will make my day by answering CoRrEcTlY!
Answer:
6 and 8
Explanation:
What do you think it means to "use safe cooking practices?"
Using safe cooking practices means taking the proper precautions in the kitchen to avoid accidents and any injuries.
~theLocoCOco
Answer:
to be safe
Explanation:
just follow intructions and watch what u do
0.190 moles cesium chloride converted to grams
Answer:
31.9881055
Explanation:
0.190*168.35=31.9881055
Please answer correctly !!!!! Will mark brainliest !!!!!!!!!!!!!!
Answer: Solids
Explanation:
In the solid state, the individual particles of a substance are in fixed positions with respect to each other because there is not enough thermal energy to overcome the intermolecular interactions between the particles. As a result, solids have a definite shape and volume.
Which of the following is NOT a physical property?
A. melting point
B. state of matter
C. density
D. flammability
Answer:
i think.its D ddddddddddddd
Potasyum-40 küçük atom numaralı doğal radyoaktif birkaç element izotopundan biridir ve doğada K izotopları içerisindeki bolluk yüzdesi %0,012'dir. 1,65 mg K/mL içeren bir bardak sütü içtiğiniz zaman kaç tane 40K atomu yutmuş olursunuz? (1 Bardak süt 225 mL, K: 39,10 g/mol)
Answer:
6.707 × 10¹⁷
Explanation:
From the information given:
40 ^ K kütlesi = sütteki K kütlesi × 40 ^ K / 100 kütle yüzdesi
nerede;
sütteki K kütlesi = 1.65 mg of K/mL × 225 mL = 371.25 mg of K
∴
40 ^ K kütlesi = 371.25 × 0.012/100
40 ^ K kütlesi = 0,04455 mg = 4.455 × 10⁻⁵ grams
40 ^ K mol sayısı = 40 ^ K kütlesi / molar kütle
= 4.455 × 10⁻⁵/40
= 1.11375 × 10⁻⁶
Son olarak, 40 ^ K = mol × Avogadro sayısı atomları
= 1.11375 × 10⁻⁶ × 6.022 × 10^23
= 6.707 × 10¹⁷
i need so much help 50 points!!!!!! complete the graph
A sample of gas is stored at 15 atmosphere and has a volume of 5 liters.If the volume of the gas is reduced to 3 liters,what will the new pressure be?
The new pressure will be : 25 atm
Further explanationBoyle's Law
At a constant temperature, the gas volume is inversely proportional to the pressure applied
[tex]\rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}[/tex]
P₁=15 atm
V₁=5 L
V₂= 3 L
[tex]\tt P_2=\dfrac{P_1.V_1}{V_2}\\\\P_1=\dfrac{15~atm\times 5~L}{3~L}\\\\P_1=\boxed{\bold{25~atm}}[/tex]
Find the percent of water in Zn3(PO4)2 x 7H2O
Answer:
24.66%
Explanation:
To find the percent of water (H2O) in the following compound: Zn3(PO4)2. 7H2O
The atomic mass of the elements are as follows:
Zn = 65g/mol
P = 31g/mol
O = 16g/mol
H = 1g/mol
Hence, molar mass of the compound is as follows:
65(3) + {31 + 16(4)} 2 + 7{1(2) + 16}
195 + 95(2) + 7(18)
195 + 190 + 126
511g/mol
Molar mass of 7H2O
= 7(18)
= 126g/mol
Hence, the percent of H2O in the compound is:
Molar Mass of 7H2O/molar mass of compound × 100
= 126/511 × 100
= 0.2466 × 100
= 24.66%
Which of the following samples of water will contain the most heat?
А-1 KL of water at 20°C
B- 1 kL of water at 70°C
C- 1 mL of water at 50°C
D- 1 mL of water at 80°C
Answer:
The answer is D- make sure you give good rate
How many total electrons does Fluorine have?
Answer:
nine electrons
Explanation:
Answer:
There are 9 total electrons. There is always the same number of protons and neutrons so the charge in the atom balances out. The atomic number is the number of protons, and electrons.
Explanation:
For the compound butane (C4H10)
a) What are the elements in the compound?
b) What are the number of atoms of each element?
c) What are the total number of atoms per molecule?
calculate the ratio of molecules present in 16g of methane and 16g of oxygen
Answer:
The ratio = 2 : 1
Explanation:
What part of the atom tells you what element it is?
Number of electrons
Number of Photons (the light particle)
Number of Neutrons
Number of Protons
Answer: I believe it is the number of protons.
What is the percent of Li in
Li3N?
(Li = 6.94 amu, N = 14.01 amu)
Answer:
The percentage by mass of lithium in one mole of Li₃N is approximately 59.78%
Explanation:
The given compound is Li₃N
The atomic mass of lithium, Li = 6.94 amu
The atomic mass of nitrogen, N = 14.01 amu
Therefore by definition, we have;
The mass of one mole of lithium, Li = 6.94 g
The mass of one mole of nitrogen, N = 14.01 g
One molecule of Li₃N contains 3 atoms of lithium, Li and 1 atom of nitrogen, N
The mass of one mole of Li₃N = The molar mass of Li₃N = 3 × The mass of one mole of lithium + The mass of one mole of nitrogen
∴ The mass of one mole of Li₃N = 3 × 6.94 g + 14.01 g = 34.83 g
The percentage by mass of lithium, Li, in one mole of Li₃N = 3×6.94/(34.83) × 100 ≈ 59.78%
The percentage by mass of lithium in one mole of Li₃N ≈ 59.78%.
Calculate the wavelength of radiation with a frequency of 4.9 ×1014 per second.
Answer in units of meters.
The wavelength-λ = 6.12 x 10⁻⁷ m
Further explanationRadiation energy is absorbed by photons
The energy in one photon can be formulated as
[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]
Where
h = Planck's constant (6,626.10⁻³⁴ Js)
f = Frequency of electromagnetic waves
f = c / λ
c = speed of light
= 3.10⁸ m/s
λ = wavelength
The wavelength of radiation with a frequency of 4.9 ×10¹⁴/s :
[tex]\tt \lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3.10^8}{4.9\times 10^{14}}\\\\\lambda=6.12\times 10^{-7}~m[/tex]
What is a biotic factor
Answer:
can be described as any living component that affects another organism or shapes the ecosystem.
Explanation: