Answer:
Quantitative Observations
Explanation:
Describe electrons.
Location:
Charge:
mass
Answer:
Describe electrons.
Location: electron cloud
Charge: negative
Mass: one-two thousands amu
Explanation:
When vinegar and baking soda are combined bubbles begin to form. Bubbles are evidence of a chemical reaction because they
Answer:
bubbled
Explanation:
its simple they bubbled
signs of chemical reactions are change of
odor
bubbles
solid turns liquid
liquid turns solid
change of color
Pls, Help!!!!
When ionized, which of the following would become isoelectronic with argon?
Answer:
[tex]Cl^-[/tex]
Explanation:
Hello.
In this case, when chlorine gets ionized by gaining one electron it goes:
[tex]Cl^-[/tex]
Whose electron configuration is the same as argon:
[tex]Cl^-=Ar:1s^2,2s^2,2p^2,3s^2,3p^6[/tex]
Since the both of them have 18 electrons, they become isoelectric with the same neutral charge.
Best regards.
According to the octet rule, an atom is usually stable when it has _____ valence electrons.
A. 4
B. 8
C. 6
D. 10
Answer:
B. 8
Explanation:
Compare and contrast ionic and covalent bonds by explaining what the electrons do when bonding occurs. Use details to support your answer.WILL GIVE BRAINLIEST
How many oxygen atoms are in H2SO4?
A student needs 1.52 moles of sodium hydroxide (NaOH). How many grams of sodium hydroxide are required? (1 mole NaOH = 40.00 grams NaOH) *
60.8 grams NaOH
1.00 grams NaOH
62.7 grams NaOH
0.038 grams NaOH
Answer:
1 molecule = 40.00 grams
1.52 molecules = 1.52*40.00
= 60.8 grams
For the reaction 4 K + 2S ⇒2[tex]_{2}[/tex]S, How many atoms of sulfur will react with 52 atoms of K?
Please! Show your work!
Answer:
~26 atoms of sulfur
Explanation:
When working problems involving equations I find it helpful to works through moles because it relates to the coefficients of balanced equation by linear ratio. In other words, convert data to moles, solve by ratio and convert results to desired dimensions. In this case Atoms of Sulfur.
Given: 52 atoms K = 52 atoms/6.02 x 10²³atoms K/mole K = 9.64 x 10⁻²³ mole K atoms.
Using ratios in given equation 4K + 2S => 2K₂S
Says
4 moles K reacts with 2 moles Sulfur, then
8.64 x 10⁻²³ mole K reacts with X moles Sulfur
Set up ratio:
(4 moles K) / (8.64 x 10⁻²³ moles K) = (2 moles S) / X
Solve for X => X = (2 moles S x 8.64 x 10⁻²³ mole K) / 4 mole K = 4.32 x 10⁻²³ mole S used
Converting moles S to atoms S, multiply by Avogadro's Number ...
Atoms S used = 4.32 x 10⁻²³ mole S used x 6.02 x 10²³ Atoms S / mole S
=> 26.0064 Atoms S ≈ 26 Atoms Sulfur used.
Note: This is a reasonable answer in that the balanced equation given indicates that half the number moles S reacts with K. So, one can conclude that half the number of potassium atoms would indicate the number of sulfur atoms needed. test => ¹/₂(52) = 26 atoms S.
do people cause melting glaciers
Answer:
Human activities are at the root of this phenomenon.
Explanation:
Question 4 (1 point)
Neon gas is often used to make signs for restaurants and businesses. However, neon only accounts
for 0.0018% of Earth's atmosphere. Scientists are looking for other elements that have similar
properties as neon that could be used as a substitute. Which of the following elements would most
likely be a good substitute?
Oь
Argon
Flourine
Chlorine
Oxygen
d
Submit
Submit
Answer:
Argon
Explanation:
The element that would most likely be a good substitute for neon is "argon".
These two elements belong to the noble gases in Group 18(8A) of the Periodic Table. They are inert gases - they do not react chemically with other substances.
Argon, as an inert gas is often used whenever an inert atmosphere is needed. Argon is used in incandescent light bulbs. It is used to stop oxygen from corroding the filament. It is also used by welders to protect weld area.
Argon is a good substitute for neon in this context because they possess some physical properties which are similar.
The isotope of an atom containing 31 protons and 39 neutrons suddenly has two neutrons added to it. What isotope is create?
Which is the correct name for the compound CoCO 3?
A
Cobalt Carbonoxide
B
Cobalt (II) Carbonate
C
Carbon Oxygen Carbonate
D
Cobalt Carbonate
QUICK PLEASE!!!
Answer:
Cobalt (II) Carbonate
Explanation:
Answer:B
Explanation:
Cyclohexanecarboxylic acid, C6H11COOH (pKa 4.90), is only slightly soluble in water, but its sodium salt, C6H11COO-Na , is quite soluble in water. Describe the solubility of cyclohexanecarboxylic acid in solutions of sodium hydroxide, sodium bicarbonate (NaHCO3), and sodium carbonate (Na2CO3). The pKa values for the conjugate acids of sodium hydroxide, sodium bicarbonate (NaHCO3), and sodium carbonate (Na2CO3) are 15.7, 6.36, and 10.33, respectively.
Answer:
See explanation
Explanation:
Carboxylic acids are all soluble in solutions of NaOH, Na2CO3 and NaHCO3 due to the formation of a sodium salt of the acid.
In all these cases, the sodium salt of cyclohexanecarboxylicacid formed is more soluble in water than the parent acid.
When the acid is dissolved in sodium bicarbonate or sodium carbonate, carbon dioxide gas is also evolved.
Which characteristic of life is described as the transfer of DNA from parent to offspring, and is important for keeping a species alive
A. Homeostasis
B. Cell Organization
C. Heredity
Answer:
C. Heredity
Explanation:
Homeostasis means that an organism can control its own body temperature. This is important because if we couldn't control our temperature, then our cells would have trouble working properly from being to hot or cold.
Cell organization means that our body and cells can organize themselves into groups that work together. For example, cells form groups and tissue for different organs while other cells form nerves.
Heredity is the passing of genes from parent to offspring
If you include structures in which sulfur has an expanded octet and exclude structures with triple bonds, how many resonance structures can be drawn for sulfur trioxide, SO3
Answer:
Seven
Explanation:
SO3 has a trigonal planar structure. The most apt bonding description is that of sulphur forming three sigma bonds giving rise to the plane triangle and then the presence of three delocalized pi bonds.
Plausible resonance structures for SO3 has been shown in the image attached. In all the structures, there is none in which sulphur is pictured as having triple bonds.
image credit: socratic
A purified protein has a molecular mass of 360 kDa when measured by size exclusion chromatography. When analyzed by gel electrophoresis in the presence of SDS, three bands are observed, with molecular masses of 160, 140, and 60 kDa. When gel electrophoresis is carried out in the presence of SDS and dithiothreitol, three bands are once again observed, with molecular masses of 140, 80, and 60 kDa. What is the subunit composition of the protein?
Answer:
A protein has four subunits whose molecular masses are 140, 80, and 60 kDa.
A disulfide bond links the two 80 kDa subunits (possibly identical).
Explanation:
Given that:
A protein has four subunits whose molecular masses are 140, 80, and 60 kDa.
A disulfide bond links the two 80 kDa subunits (possibly identical).
As a result of SDS and dithiothreitol analysis treatment, the molecular masses can not be 360 in total. They are 280, which implies that they are in short of 80 kDa. This means that there are possibilities that two groups with a molecular mass of 80 kDa which are joined by a disulfide bond.
The presence of SDS and dithiothreitol acts as a reducing agent, and they can break disulfide bonds whose pH is greater than 7, i.e. those in basic condition.
Help me out i don’t not understand this
Explanation:
hope this helps!!! happy learning!!!!
6th grade help me plzzzzzz
Answer:
It's protons and neutronsExplanation:
Hope this helpsCu(NO3)2+Zn(s)>Cu(s)+Zn(NO#)2 is an example of which type of reaction. A) decomposition B) single-displacement C) combustion D) double-displacement
How many grams of sodium are in .500 of a mole
Convert mole to gram by multiplying the molar mass of sodium
0.500mol Na x 22.990g = 11.495g of Na
How can sediment be a bad thing??
Answer:
Sediment increases the cost of treating drinking water and can result in odor and taste problems. Sediment can clog fish gills, reducing resistence to disease, lowering growth rates, and affecting fish egg and larvae development.
Explanation:
Answer:
"Sediment increases the cost of treating drinking water and can result in odor and taste problems. Sediment can clog fish gills, reducing resistance to disease, lowering growth rates, and affecting fish egg and larvae development".
Explanation:
How much energy was absorbed by the water?
Explanation:
Which properties makes a metal a good material to use for electrical wires?
A. Malleability and reactivity
B. Conductivity and ductility
C. Ductility and malleability
D. Reactivity and conductivity
Answer:
D
Explanation:
Because a metal must reactive and able to conduct
Answer:
B.Conductivity and ductility
Explanation.
Some metals are conductive and are ductile
Conductivity is the ability to have an electric flow
Ductility is the ability to bend
Which statement best explains why the overall charge on an atom is zero?
Answer:
which statements
Explanation:
Answer:
The positive charge of the protons in the nucleus equals the negative charge in the electron cloud.
Explanation:
I just took the assignment.
a homogeneous is a mixture
Answer:
True
Explanation:
A homogeneous mixture is simply any mixture that is uniform in composition throughout. As long as each substance is mixed in enough to be indistinguishable from the others, it is a homogeneous mixture.
The mass of a golf ball is 45.9 g . If it leaves the tee with a speed of 61.0 m/s , what is its corresponding wavelength?
Answer:
The corresponding wavelength is 2.4×10⁻³⁴ m.
Explanation:
Given data:
Mass of ball = 45.9 g (45.9/1000 = 0.0459 kg)
Speed of ball = 61.0 m/s
Wavelength = ?
Solution:
Formula:
λ = h/mv
λ = wavelength
h = Planck's constant
m = mass
v = velocity
Now we will put the values in formula.
λ = 6.63×10⁻³⁴ kg.m².s⁻¹ / 0.0459 kg ×61.0 m/s
λ = 6.63×10⁻³⁴kg.m².s⁻¹ /2.8 Kg.m/s
λ = 2.4×10⁻³⁴ m
The corresponding wavelength is 2.4×10⁻³⁴ m.
what is the formula for titanium (IV) sulfate
what is the next step if a scientist's hypothesis is supported
Juan measures a piece of metal and determines it has a mass of 10 grams and a volume of 2 ml
What is the density of the piece of metal?
Answer:
The answer is 5.0 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 10 g
volume = 2 mL
We have
[tex]density = \frac{10}{2} \\ [/tex]
We have the final answer as
5.0 g/mLHope this helps you
Answer:
5.0 g/mL
Explanation:
A crate is pulled with a force of 165 N at an angle 30 °
northwest. What is the resultant horizontal force on the crate?
Help asap
Answer:
143 N
Explanation: