Answer:
This can be determined by looking at the number of protons.
Explanation:
The atomic number which is the number of protons is the best indicator of what an element is.
Based on the number of protons in an atom, elements are arranged in a definite grouping on the periodic table.
This because, atoms do not readily give off their protons so, it is a good measure of the type of atom one might be dealing with.
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2)
The temperature 30. K expressed in degrees Celsius is
A)
243°C
B)
-243°C
C)
303°C
D)
-303°C
Answer:
B
Explanation:
From Celsius to Kelvin add 273
From Kelvin yo Celsius subtract 273
Hence 30 - 273 = -243
Clinical thermomerter
Answer:
Here is the definition: A medical thermometer (also called clinical thermometer) is used for measuring human or animal body temperature.
A 975 L balloon contains helium. On the ground the temperature is 30 0C and the pressure is 743 torr. What will be the balloon's volume at an altitude of 5700 m where the pressure is 375 mm Hg and the temperature is -35.0 0C?
Answer:
V₂ = 1518L
Explanation:
-Using combined gas law:
[tex]\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}[/tex]
Where P is pressure, V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.
Initial states:
P₁ = 743 torr
V₁ = 975L
T₁ = 30°C + 273.15K = 303.15K
P₂ = 375 mmHg = torr
V₂ = Our incognite
T₂ = -35°C + 273.15K = 238.15K
Replacing:
[tex]\frac{743torr*975L}{303.15K} =\frac{375torrV_2}{238.15K}[/tex]
V₂ = 1518LRound the number 31.257592 to 5 significant figures.
Explanation:
Highlight the first 5 digits. You should highlight 3, 1, 2, 5, and 7 in that order.
Note the next digit after that is a 5, meaning we'll round that 7 up to 8
So 31.257592 becomes 31.258 when we round to five significant figures.
What does an atomic number represent in an atom? number of neutrons number of protons number of electrons number of protons and neutrons
Answer:
The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.
Answer: I'm pretty sure the answer is Number of Protons
Explanation:
I took the k-12 test
How did astronomers use technology to identify characteristics of the Crab nebula? technology that detects ultraviolet light found hydrogen in the nebula technology that detects radio waves identified a pulsar at the center of the nebula technology that detects microwaves revealed the behavior of electrons in the nebula technology that detects gamma rays measured the distance of the nebula from Earth
Answer:
technology that detects radio waves identified a pulsar at the center of the nebula
Explanation:
Crab nebula(M1) is a blob-like patch which is supernova remnants as far as Constellation of Taurus is concerned.
It has apparent magnitude of 8.4 and can only be viewed by telescope. The astronomers make use of technology that detects radio waves, which identified a pulsar at the center of the nebula, this pulsar is a magnetized rotating compact star which is known with it's electromagnetic emissions.
Answer:
technology that detects radio waves identified a pulsar at the center of the nebula
Explanation:
What is the V2O5 coefficient??
Answer:
1235
Explanation:
if thers a a guess in that number
The compound V₂O₅ has a Seebeck coefficient at a temperature of 50 °C of -990 μV/K.
What is a compound?Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds .Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
Learn more about compounds,here:
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what is the temperature of the liquid at vaporization (boiling/condensing)?
4. One of the most common predation relationships that can be seen in the Florida Everglades is between the Florida
Panther and the White Tailed Deer. Since the Florida Panther is an endangered species, what would happen to the
deer population as the panther population decreases in size?
A. The deer population would decrease.
B. The deer population would not be affected.
C. The deer population would increase indefinitely.
D. The deer population would increase and then level off.
Answer:
D
Explanation:
It would be D because it would increse yes in population because the panthers are decreasing and attacking less. But, it would still level off because there are other predators who can kill the white tailed deer. Also the panther who is endangered could still atack even though theres just a few left that does not affect them from attacking. So it would increase but it would still level off.
A wave that travels at the speed of light and consists of a combined electric and magnetic effect
Answer:
Electromagnetic waves
Explanation:
The description given is that of an electromagnetic wave.
Electromagnetic waves are propagated by the vibration of electrical and magnetic fields in a perpendicular direction to one another.
These waves generally travel at the speed of light. They are made up of magnetic and electric fields. They do no require a material medium for their propagationThey can pass through a vacuum.help pls I will give brainliest!
Answer:
The answer is D, I would type it out but it is to long and I'm kind of lazy, but anyways! Your answer is D
Hope This Helps!
o
0
8
oo
is this how mitosis works?
Please give real answers, brainliest to best
Answer:
Pretty much, yes!
Explanation:
The cell starts like this: o
First, the DNA inside the cell replicates and condenses into chromosomes. The also gathers all the materials necessary to divide and duplicates some organelles. (represented by 0)
Then the chromosomes pair up and are pulled to opposite poles of the cell. Then, the membrane pinches (invaginates) in in preparation to make two cells (8).
Then, cytokinesis occurs, when the cytoplasm splits and two new cells are formed (oo)
a snail slowly moves along at 3 ft/hr. what type motion velocity ,distance, speed acceleration displacement Please answer need it now!!!!!
Answer:
motion - forward
velocity - 3ft/hr
distance - 3 ft/hr
speed - 3 ft/hr
acceleration - none
displacement - ?????
Explanation:
If the decay has a half-life of 10.2 years, what mass of 60.8g carbon-14 will remain after 20.4 years
Answer:
15.2 g.
Explanation:
After 10.2 years mass remaining = 60.8 * 1/2 = 30.4 g
After another 10.2 years it is 30.4 * 1/2 = 15.2 g.
What state of matter is steam?
A. Gas
B. Liquid
C. Solid
D.Transitive
Answer:
Steam is an invisible gas
Explanation:
so A. Gas
Answer:
gas
Explanation:
The sun causes water in the pond to evaporate
1.conduction
2.convection
3.radiation
Answer:
The answer is Radiation
Answer:
Convectional
Explanation:
It is the movement of heat through fluid
While radiation travels though a vacuum and conduction accrues between atoms / solids
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Si units are the modern form of _____
Answer:
Metric system !!hope this helpss
Help me plz and need it bad
Answer:
Explanation: p + ci=pci
h+o=h io
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What is the total number of atoms in 36 molecules of glucose C6 (H2O) 6
Answer:
Explanation:
Glucose has a chemical formula of: C6H12O6 That means glucose is made of 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms.
Harry dissolved 9.36 g sample of LiOH into water in a calorimeter. The temperature of the calorimeter rose from 36.9 degrees Celsius to 52.8 degrees Celsius. The heat capacity of the calorimeter and its contents is 639 J/ degC. What is the enthalpy for the solution process if Harry repeats the lab again and 2.85 mol of the LiOH was dissolved? Given: the molar mass of LiOH is 23.95 g/mol
Answer:
did u get the answer?
Explanation:
What element is steel mainly composed of?
A. Iron
B. Carbon
C. Manganese
D. Silver
how many hydrogen atoms are there in one mole of ethanol.
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Please explain VSEPR (Valence Shell Electron Pair Repulsion) of Molecular Geometry.
Answer :electrostatic repulsion.
EXPLANATION
Valence shell electron pair repulsion theory, or VSEPR theory, is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms
Answer:
VSEPR Is a model used to protect 3D molecular geometry based on a number of valence shell electron bond pairs among the atoms in a molecule or ion.
Explanation:
When fossil fuels, such as gasoline, are burned, they create smoke. Smoke is best described as a heterogeneous mixture of solid particles from the burning fuel dispersed in a gas – usually air. Smoke can be described more specifically as a suspension. What will most likely happen over time to smoke in the atmosphere? The solid particles will spread out and dissolve. The particles will eventually come together in a cloud and produce rain. Over time, the solid particles will settle on whatever is outside. The particles will remain mixed in the air.
Answer:
Over time, the solid particles will settle on whatever is outside."
Explanation:
Answer:
C
Explanation:
A runner eats a snack with 375 Calories of nutritional energy. After her snack, she burns 3.16 x 10^6 joules while running
Answer:
The complete question is given below
A runner eats a snack with 375 Calories of nutritional energy. After her snack, she uses 3.16 X 106 joules while running [1 Calorie = 4184 joules).
Which of the following statements are true? Select all that apply.
A. There were 1.57 X 106 joules of energy in the snack.
B. There were 3.14 X 106 joules of energy in the snack.
C. During her run, she used 755 Calories of energy.
D. During her run, she used 189 Calories of energy.
E. The runner used more Calories while running than she consumed during her snack.
F The runner used fewer Calories while running than she consumed during her snack.
Answer: Options A, C and E are all correct options
Explanation:
From the question,
1 calorie = 4184 Joules
therefore 375 calories from the consumed snack
= (4184 x 375) J
= 1,569,000J
= 1.56 x 10⁶ J (option A is correct)
While running, she expends 3.16 x 10⁶ J. We can convert this to calories to see how much calories she expended while running
Recall 4184 Joules = 1 calorie
therefore, 3.16 x 10⁶ Joules is equivalent to
= (3.16 x10⁶/ 4184) calories
= 755.6 calories (option C is also correct)
If she consumes 375 calories from her snack but expended 755 calories during her running exercise, therefore the runner consumed fewer calories than what she expended during her exercise, hence option E is also correct
Answer: Options A, C and E are all correct options
What is 210 kg - 38 kg rounded to the correct number of significant figures
Answer:
170kg
Explanation:
Determine the pressure of a 6.4L sample of oxygen gas at 300K and 100KPa, after the gas is compressed to 2.40L at 900K.
The pressure : 800 kPa
Further explanationBoyle's law and Gay Lussac's law
[tex]\tt \dfrac{P_1.V_1}{T_1}=\dfrac{P_2.V_2}{T_2}[/tex]
P1 = initial gas pressure (N/m² or Pa)
V1 = initial gas volume (m³)
P2 = gas end pressure
V2 = the final volume of gas
T1 = initial gas temperature (K)
T2 = gas end temperature
The pressure after the gas is compressed :
[tex]\tt \dfrac{100\times 6.4}{300}=\dfrac{P_2\times 2.4}{900}\\\\P_2=800~KPa[/tex]
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(picture included with one question ^^^^^^^)
Answer:
type D
balance form .b
Explanation:
If a star has a higher apparent magnitude, what does that mean? A low apparent magnitude?