Answer:
Halogens are highly reactive
How did james Chadwick know that neutrons are neutral ?
Answer:
In 1932, he tried similar experiments himself, and became convinced that the radiation ejected by the beryllium was in fact a neutral particle about the mass of a proton. ... Chadwick also noted that because the neutrons had no charge, they penetrated much further into a target than protons would.
Explanation:
Answer this question will give brainliest
Answer:
heat energy
Explanation:
heat give energy so heat carriers energy
Which is a chemical property of hydrogen?
A.
It is a light gas.
B.
It is a combustible gas.
C.
It is a colorless gas.
D.
It has a boiling point of -252.87°C.
E.
It is a good conductor of electricity.
Answer:
CExplanation:
It is a colorlessI hope you help by my answee
Which statement(s) correctly compare the masses of protons, neutrons, and electrons? Select two options.
1. Protons and neutrons have similar mass.
2. Protons and electrons have similar mass.
3. Neutrons and electrons have similar mass.
4. Protons are smaller than a neutron or an electron.
5. Neutrons are smaller than a proton or an electron.
6. Electrons are smaller than a proton or a neutron.
Answer:
6 Electrons r smaller than a proton or a neutron
Answer:
1st and last one
Explanation:
1. A sample of nitrogen occupies a volume of 250 mL
at 298 K. What volume will it occupy at 268 K?
Answer:
0.225 L = 225 mL
Explanation:
Charles' Law states that for a fixed pressure, the volume is directly proportional to the temperature, which means things expand at the same rate as the rate of it being heated up
Mathematically, we can write that as:
V1/T1 = V2/T2, where 1 and 2 are the two situations
So, when we substitute the values in, we get:
0.25 L/298 K = V2/268 K
Rearranging this, we get:
(0.25/298) x 268 = 0.225 L = 225 mL.
This also makes sense, as the volume reduced a little when the temperature reduced (cooled down)
Let me know if this makes sense, and hope I helped! :)
If there is H2O and O2 what it's going to be
Answer:
o232
Explanation:
how many neutrons are in the stable isotope of rhenium
Properties of Rhenium-185 Isotope:
Properties of Rhenium-185 Isotope: RHENIUM-185
Neutron Number (N) 110
Atomic Number (Z) 75
Mass Number (A) 185
Nucleon Number (A) 185
25 more rows
This painting is showing the actions of American colonists at the 1773 protest known by what name? A) The Plymouth Rocks B) The Boston Massacre C) The Boston Tea Party D) The New York Draft Riots
that will be the Boston tea party
Explanation: C) the Boston tea party
I did the quiz
Which term names a property of a mineral? (I'm sorry if this says Chem. I couldn't find Sci. on the list)
Answer:
Naturally occurring
Explanation:
please mark me brainliest
Answer:
Streak
Explanation:
Streak is the microscopic remains of minerals in powder form after being rubbed with porcelain plates. The streaks do not have orderly arranged lattice structure or unit cells.
They are randomly arranged and microscopic size powders. The streak of minerals cannot be distinguished easily as it mostly appears similar for all minerals.
Thus, among the given options streak is one in the property of minerals. We can rely upon streaks as it cannot be easily affected by impurities.
PLEASE HELPP!!!!
What kind of metal is Cu?
Alkaline Earth Metal
Alkali Metal
Transition Metal
Answer:
transition metal
Explanation:
Answer:
Copper is a Transition metal.
Explanation:
Use the periodic table website! It tells you what kind of metals the elements are and if they are metals or nonmetals.
Website: ptable.com
jude uses me in a beam with loads of others like me to find new materals
Answer:
good morning I am going home with 6
what kind of chemical processes are used to create these synthetic products
Aluminium is a natural material that is widely utilised in a variety of sectors and may be converted into a variety of synthetic goods via various chemical processes.
The following are some examples of synthetic compounds created from aluminium and the accompanying chemical processes:
Aluminium Foil: Aluminium foil is a thin, flexible sheet of metal.Aluminium Cans: Aluminium cans used for beverage packaging are created through a process known as can forming. Aluminium alloys are synthetic goods formed by mixing aluminium with additional elements such as copper, zinc, magnesium, or silicon.Thus, these are only a few examples of synthetic goods generated from aluminium and the chemical processes that produce them.
For more details regarding synthetic goods, visit:
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Your question seems incomplete, the probable complete question is:
What synthetic products are derived from the natural resource aluminum? What kind of chemical processes are used to create these synthetic products?
Which of the following areas would most likely see the largest amount of heat
flowing up towards the surface of Earth?
a. any area that just experienced an earthquake
b. an area of active volcanoes
c. all areas around the equator
d. heat never flows to the surface of the earth
Answer:
c. because all countries around the equator experiences heat
Calculate the medullary index of a hair whose diameter is 110
microns wide and whose medulla measures 58 microns. Is this
a human or animal hair?
The medullary index of hair is the ratio of medullary diameter to the diameter of hair. Thus the medullary of hair with 110 microns and medulla diameter of 58 microns is 0.533. This is an animal hair.
What is hair medullary index?Medullary index of hair is the ratio of diameter of the medullary part and the diameter of the hair strand. From this value, we can identify whether the sample hair is of humans or animals.
Hair is made proteins called keratin. The protein structure of hair vary from human to human even one hair strand to the other and similar way it is different in animal hair too.
The hair strand of humans are thin than the hair strands of animals. Thus the medullary index of humans is 0.333 or less. If the index is 0.50 or greater it is of animals.
Here the diameter of hair is 110 microns and that of medulla is 58 microns thus medullary index is 58/110 = 0.55 microns. Which means that it is an animal hair.
To find more about medullary index, refer the link below:
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helppppppppppppppp please please please
Answer:
For your first one it is C and your second one is D how deep is the lake.
Its going to be disicult to swim down at the bottom of a lake with all your class just to see how deep it is, so its better to make a model
Someone pls help me I will make you brain
Answer:
C. negative global warming
De quien es el modelo matemático
Answer:
si
Explanation:
Can someone please help me
Explanation:
Solids have a definite shape and volume. Liquids have a definite volume, but take the shape of the container. Gases have no definite shape or volume.
The kinetic theory of matter (particle theory) says that all matter consists of many, very small particles which are constantly moving or in a continual state of motion.
According to the kinetic molecular theory, the pressure of a gas increases as
the number of moles of gas molecules increases because —
Answer:
The volume of the gas therefore becomes large as the temperature of the gas increases, the frequency of collisions with the walls of the container must increase. This, in turn, leads to an increase in the pressure of the gas.
Explanation:
hope it helps.
Write the law of conservation of matter…
(Please Answer fast)
Answer:
The Law of Conservation of Matter states that matter cannot be created or destroyed. In a physical change, substances can change form, but the total mass remains the same. In a chemical change, the total mass of the reactants always equals the total mass of the products. Materials.
using the standard enthalpies of formation, what is the standard enthalpy of reaction?
Answer:
This equation essentially states that the standard enthalpy change of formation is equal to the sum of the standard enthalpies of formation of the products minus the sum of the standard enthalpies of formation of the reactants. and the standard enthalpy of formation values: ΔH fo[A] = 433 KJ/mol.
Explanation:
Hope this helps.
microfilaments are composed of ____________ in ____________ arrangement.
Explanation:
microfilaments are composed of repeating actin subunits in a thin double-helix arrangement.
Why are some ions known as poly atomic ions?
Answer:
NH4+ ammonium ion hydroxide ion
SO32- sulfite ion perchlorate ion
NO3- nitrate ion chlorate ion
NO2- nitrite ion chlorite ion
2. What are core elections? How are they represented in the shorthand electron configurations?
Answer:
In shorthand electron configuration, the electron configuration starts with the symbol of the noble gas in the previous period, followed by the additional configuration of the electrons for the given element. For example, aluminum has the atomic number 13, which is the number of protons in the nuclei of its atoms.
Explanation:
Hope this helps.
How do the metals in group 1 compare with the transition metals?
Answer:
Group 1 metals and transition metals are different from each other, mainly based on the colour of the chemical compounds that they form. The key difference between group 1 metals and transition metals is that the group 1 metals form colourless compounds, whereas the transition metals form colourful compounds.
How many total atoms are in this formula?
2MgSO4
How many moles of HCl will be produced when 34.56 g of AIC3 are reacted according to this chemical equation
Answer:The answer to your question is It will be formed 0.39 moles of H₂
Data
moles of H₂ = ?
moles of HCl = 0.78
moles of Zinc = excess
Balanced chemical reaction
2 HCl + Zn ⇒ 1 H₂ + ZnCl₂
Process
Explanation:
1.- Use proportions to solve this problem. Consider the coefficients of the balanced reaction.
2 moles of HCl ---------------------- 1 mol of H₂
0.78 moles of HCl ----------------- x
x = (0.78 x 1) / 2
- Simplification
x = 0.78 / 2
- Result
x = 0.39 moles of H₂
What is empirical evidence
A retest of experimental results to make them reliable
Knowledge gained by observation or measurement
A prediction of test results before an experiment
A conclusion derived from evidence and logical reasoning
I will brainless who can answer this all pleaseeeeejvv
Answer:
White-Blue-Red-Yellow-Orange
Explanation:
The sun emits all colors of the rainbow more or less evenly.
⚠️ I'm not 100% sure but for sure there is White ⚠️
before making a covalent bond, where do the atom's electrons spend most of their time?
Answer:
Before bonding, the atom's electrons spend most of their time around the nuclei of each atom. Once bonded, the electrons spend most of their time between the two nuclei