Answer:
H, Ca, Cl is the answer dude
Answer:
hydrogen is H
calcium is Ca and chlorine is Cl
helllllppppppp pleaseeeeeee
a tiny particle in the nucleus of an atom that is about the same size as a proton is a(n)
A. electron
B. neutron
C. solid
D. element
Answer:
b. neutron.
Explanation:
I hope this helps.
Answer:
B. Neutron
Explanation:
Neutrons are about the same size as protons. In addition, nuclei are made up of neutrons and protons. Electrons are located in the electron cloud, which is outside of the nucleus. Solids are hard matter, and an element is a substance that cannot be broken down any further.
Hope this helps!
Covert 50oC to k
(I’ll mark you as brainlister)
Answer:
323 K
Explanation:
To convert Celcius to kelvin first you need to remember this equation:
C + 273 = K (K = kelvin and C = celsius)
Next, you substitute with what you have given:
50 + 273 = K
Solve the equation by adding 50 and 273
k = 323
1 pts
Which of the following gases would you predict to be least ideal?
Cu
Explanation:
The gas that would behave least ideally is CO
Each solute in the table is mixed in a volume of 500 mL of water. Organize the solutions from least conductive to most conductive.
A)
4,2,1,3
B)
4, 1, 2, 3
C)
2, 4, 3,1
D)
1, 3, 4,2
Answer:
b
Explanation:
Answer:
B) 4,1,2,3
Explanation:
Did it on USA Test prep. :)
PLEASE ANSWER QUICKLY
Which are characteristics of arthropods? Check all that apply.
radial symmetry
nervous system
asexual reproduction
segmented body
open circulatory system
Answer: I say its Segmented body and radial symmetry im not sure if it is right
Explanation:
Answer:
B. Nervous system
D. Segmented body
E. Open circulatory system
Explanation:
Hope this helps!
Have a nice dayy! :)
What can be concluded from the following statements about a property of metats? • Acast-iron skillet on a stove is used to try bacon • A metal spoon left in a pot of soup heating on a stove is too hot to touch - An aluminum playground slide gets hot on a summer day. O A Metals combine with nonmetals.O B. Metals are good insulators. O C Metals conduct electricity D Metals conduct heat.
Answer:
D - metals conduct heat
True or false?
A limitinh factor is an environmental factor that increases the growth of a population
True or false?
Biomes are characterized by temperature, precipitation, and the plant and animal communities that live there
The main reason that we have different types of energy on the electromagnetic spectrum is because they have different
Answer:
Explanation:
The main reason is because they have different energy in the photon and different wavelength.
In the electromagnetic radiations, radio waves have little energetic photons, micro wave have more that radio waves, the visible light, ultraviolet x Ray's, and gamma Ray's have more energetic photons. They have different wavelength. The shorter the wavelength, the higher the frequency. Wavelength decreases while frequencies increases.
in pressure dunt
uwing
frost shattering
Answer:
i dont get it???????
Explanation:
when Henry mosléy came up with he's own atomic number?
I WILL MARK AS BR*NLIST IF YOU CORRECT ANSWER
Answer:
1911 is when he made it
Explanation:
Moseley's law provided a reasonably complete experimental set of data that supported the (new from 1911) conception by Ernest Rutherford and Antonius van den Broek of the atom, with a positively charged nucleus surrounded by negatively charged electrons in which the atomic number is understood to be the exact physical number of positive charges (later discovered and called protons) in the central atomic nuclei of the elements.
(PHYSICAL SCIENCE) Help please !!
El etanol combustiona con el oxigeno produciendo dióxido de carbono gaseoso y agua: En un proceso se hacen reaccionar 450.2 g de dioxígeno con 998. 2 g de etanol . a) ¿Cuál de los reactivos es el limitante? b) Calcule la masa de dióxido de carbono que se formará c) ¿ Cuanto del reactivo en exceso quedará sin reaccionar?
Answer:
uh oh stinky uh oh stinky
4. Which of the following describes a hydrogen bond? *
a) the bond between two
hydrogen atoms within a molecule of water
b) the bond between hydrogen in one water molecule and another hydrogen in a different water molecule
c) the bond between hydrogen and oxygen within a molecule of water
d) the bond between hydrogen in one water molecule and oxygen in a different water molecule
The statement that describes a hydrogen bond is the bond between hydrogen in one water molecule and another hydrogen in a different water molecule. The correct option is b.
What are hydrogen bonds?Hydrogen bonds are the bonds that are formed between water molecules and other molecules that join with hydrogen. These are weak bonds. This bond is formed between hydrogen atoms and other atoms.
One of the bonds that allow molecules to associate is the hydrogen bond. It happens when hydrogen forms a covalent bond with an element that is extremely electronegative, such as oxygen, nitrogen, or sulfur.
Thus, the correct option is b) the bond between hydrogen in one water molecule and another hydrogen in a different water molecule.
To learn more about hydrogen bonds, refer to the link:
https://brainly.com/question/19220950
#SPJ2
Choose the correct name for NH3 according to the naming system being used. What is the IUPAC name for NH3? ammonia mononitrogen hydride mononitrogen trihydride nitrogen trihydride
Answer:
Nitrogen Trihydride
Explanation:
Ammonia is the common name of NH3. However, with this naming system, you should name it as a non-metal. Nitrogen trihydride.
Answer:
Nitrogen Trihydride
Explanation:
help?? help for mee??? maybe? what if i said...please????
Answer:
c
Explanation:
because they transfer an electron the sodium ion has a positive charge, and the chlorine ion has a negative charge so one gives off positive and one gives of negative
19) Which one of the following statements describes a chemical property of hydrogen gas?
A) Hydrogen gas has a density of 0.00009 g/cm’ at STP.
B) Hydrogen gas burns in air.
C) Hydrogen gas has a boiling point of 20. K at standard pressure.
D) Hydrogen gas is colorless.
One example of parasitism is the relationship between barnacles and whales or sea turtles. True or false? If false, why?
PLEASE ANSWER QUICKKK
Answer:
True
Explanation:
it is a Predation
Mm 2mCOO 19. Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH-] is 1 x (3 points) 10-11 mol/L. Is this solution acididc, basic, or neutral? Show your work.
Answer: The hydrogen-ion concentration for the aqueous solution is [tex]10^{-3}mol/L[/tex] and solution is acidic.
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration and pOH is calculated by taking negative logarithm of hydroxyl ion concentration.
[tex]pOH=-\log [OH^-][/tex]
Putting in the values:
[tex]pOH=-\log[1\times 10^{-11}][/tex]
[tex]pOH=11[/tex]
[tex]pH+pOH=14[/tex]
\[tex]pH=14-11=3[/tex]
[tex]pH=-log[H^+][/tex]
[tex]3=-log[H^+][/tex]
[tex][H^+]=10^{-3}M[/tex]
As pH is less than 7, the solution is acidic.
What volume of oxygen at 455 K and a pressure of 127400 Pa is produced by the decomposition of 114.7 g of BaO2 to BaO and O2?
Answer:
10 L
Explanation:
The equation of the reaction is;
2BaO2 = 2BaO + O2
Number of moles of BaO2 = 114.7 g/169.33 g/mol = 0.677 moles
From the reaction equation;
2 moles of BaO2 yields 1 moles of O2
0.677 moles of BaO2 yields 0.677 * 1/2 = 0.3385 moles of oxygen
Hence;
PV=nRT
V = ?
P = 127400 Pa or 1.257 atm
T = 455 K
n = 0.3385 moles
R = 0.082 atmLmol-1K-1
V = nRT/P
V = 0.3385 * 0.082 * 455/1.257
V= 10 L
List at least three things that your body strives to keep constant. (9 points) Think about what
aspects of your body overall, of one body organ, or of your blood stay nearly unchanged all the time
Answer:
Temperature, heart rate and blood flow.
Explanation:
The three things that our body strives to keep constant in overall body aspect are Temperature, heart rate and blood flow.
What is the Importance of Life process ?Life processes are important to carry out daily life activities. They help to produce energy and maintain homeostasis in the body. The life processes help a body survive with the changes in the environment.A slight disturbance in any of the life processes disturbs the entire functioning of the body.
Therefore ,
The Three things that our body strives to keep constant in overall body aspect are Temperature, heart rate and blood flow.
Learn more about Life process here ;
https://brainly.com/question/26271234
#SPJ5
(science)Which type of harmful alleles may disappear from a population more slowly when the individual may still reproduce?
a.a dominant allele
b.a recensive allele
c.a double allele
d.a single allele
What causes circulation of air
The circulation of wind in the atmosphere is driven by the rotation of the earth and the incoming energy from the sun. Wind circulates in each hemisphere in three distinct cells which help transport energy and heat from the equator to the poles. The winds are driven by the energy from the sun at the surface as warm air rises and colder air sinks.
Answer: The circulation of wind in the atmosphere is driven by the rotation of the earth and the incoming energy from the sun. Wind circulates in each hemisphere in three distinct cells which help transport energy and heat from the equator to the poles.
Explanation:
Which best describes a heterogeneous mixture? 0 A table salt and water O B. alcohol and water O C. oil and vinegar O D. hot tea and sugar
Answer:
oil and vinegar
the rest would mix well so you can't determine the individual components
Explanation:
HELP!! 30 POINTS!!!! What does the energy graph look like for this reaction??
C3H8+5O2 -> 3CO2+4H2O
I have the data, I just need to know how to make the graph, please!!
total enthalpy of reactants= -103.85
total enthalpy of products= =-2147.81
=-2043.96 kJ/mol exothermic reaction
Answer:
Bottle Nose Dolphin ummmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
Explanation:
You use a _____ when you are changing compounds
Answer:
coeffeicent!
Explanation:
this balances equations and also changes the amount of a compound/element present
Through photosynthesis, plants use the energy in sunlight to convert water and
carbon dioxide into sugar and oxygen. Has a chemical or physical change occurred?
Explain your answer.
Answer:
chemical change occured
Colin decided to investigate soil erosion by water. He measured rates of erosion on
model hills made of soil, rock, and sand. Which of the following was the test
(independent) variable?
Answer:
i just had a test on this with 2 attempts and got it wrong on both but i do know that the answer is not...
the steepness of the models hillside
or
the rate of erosion on the hills
so the answer is either...
the amount of water sprayed on the hills
or
the type of material used to construct the model hills
but i think its the amount of water sprayed on the hills...i hope i helped a lil ;)
Explanation:
An ideal gas fills a balloon at a temperature of 227ºC and standard pressure. By what factor will the volume of the balloon change if the gas in the balloon is heated to 327ºC at standard pressure? Identify which gas law applies and show your work to receive full credit. Highlight the correct answer below. (2 points)
a. 227/327
b. 5/6
c. 6/5
d. 2/1
e. 327/227
Answer:
e. 327/227
Explanation:
This is the correct standard pressure.
how many years can carbon dioxide stay in the atmosphere formed
Once it's added to the atmosphere, it hangs around, for a long time: between 300 to 1,000 years. Thus, as humans change the atmosphere by emitting carbon dioxide, those changes will endure on the timescale of many human lives.