Answer:
Column on the periodic table tell the number of valence electrons and the types of chemicals, such as metals, nonmetals, alkaline earth metals, metalloids, halogens, noble gases.
Explanation:
The periodic table is an arrangement of the elements in order of their atomic numbers so that elements with similar properties appear in the same vertical column or group.
Am I really stupid for not knowing this ;-;
Answer:
A. Gases;nonreactive
Explanation:
No ur not stupid, lol hope this helps!
Answer:
other dude is right also you aren't another thing sorry I be late
Explanation:
How would you convert 500cc of 2M H2SO4 into g/l?
Answer:
Number of replacable H
+
ions in H
2
SO
4
=n=2
Normality =n× Molarity=2×2=4 N
C + H2O → CO + H2
What is the starting substance?
Answer:
Explanation:
Carbon and water = carbon dioxide and hydrogen
What is the most common isotope of Titanium?
The correct answer would be 48 Ti
What is the density of a piece of cement has a mass of 8.76 g and volume of 3.07 cm^3?
Answer:
2.85g/cm^3
Explanation:
density = mass/volume
density=8.76g/3.07cm^3= 2.85g/cm^3
Answer:
The answer is 2.85 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{8.76}{3.07} \\ = 2.85342019...[/tex]
We have the final answer as
2.85 g/cm³Hope this helps you
Which phrase describes a situation in which all the forces are balanced?
O A. A student slipping on icy ground
O B. A student leaning against a brick wall
O C. A student walking across a room
D. A student diving into a swimming pool
Answer:
B
Explanation:
I sacrificed my grade for pakistan.
compare and contrast elements and compunds
Answer:
The similarity is that Elements and Compunds exist in stable form because of the bonds formed between their atoms. The difference is that an element is a material that consists of a single type of atom and a compound consists of two or more types of elements held together by covalent or ionic bonds.
Explanation: Google
Show the formation of Calcium chloride by the transfer of electrons
Answer:
CaCl,2
the 2 goes to the bottom right side
What two factors affect the rate of acceleration of an object?
O force and distance
mass and weight
O force and mass
Answer:
force and mass
Explanation:
Explain how some salt solutions can be heavy and some light if they are made
with the same materials.
Answer:??????
Explanation:
Describe the flow of energy through an ecosystem from the Sun to the plant and ultimately through an animal.
Answer:
Hope this Helps! :)
Explanation:
The word ecosystem refers to the all of the living species as well as non-living elements in a particular environmental area. For instance, a lake, swamp, coral reef, forest, or a prairie would each be considered an ecosystem. Ecosystems can vary greatly in size and individual characteristics -- for instance, the ecosystem of a puddle differs greatly from that of a swath of tundra.
Despite these disparities, all ecosystems function similarly in the way in which energy flows into, through, and out of them through the energy cycle
Energy is transferred into and out of ecosystems via a web of complex interactions. Energy enters an ecosystem from external sources and moves throughout its components. For instance, energy from the sun flows through plants, microorganisms, and animals. Energy cycles in an ecosystem end with decomposition, and then the process begins anew
Essentially, the flow of energy through ecosystems can be explained by who eats what. Keep in mind, however, that energy transfer isn’t perfectly efficient; much of it dissipates as heat at various phases in the cycle.
The energy flows from the sun to the plants by photosynthesis and animal eats plants and energy is transferred from plants to animals.
What is the transfer of energy?The energy transfer isn't entirely efficient because a significant amount of it evaporates as heat at different points throughout the cycle.
Despite these differences of energy, all ecosystems function similarly in terms of the energy cycle, which governs how energy enters, passes through, and exits them.
Ecosystems receive and expend energy through a network of intricate interconnections. An ecosystem receives energy from outside sources, which circulates among its parts.
Thus, as a result of photosynthesis, energy is transmitted from the sun to plants, which are then consumed by animals.
To learn more about the transfer of energy, refer to the below link:
https://brainly.com/question/12067917
#SPJ2
Carbon burns with oxygen to produce carbon dioxide gas. Which of these shows the correct chemical reaction? C + O2 → CO2 C, O, CO2 C + O = CO2 CO2 = C + O
Answer:
c+o2=co2
Explanation:
balanced reaction it is correct
Answer:
C + O2 → CO2
Explanation:
i took the test and got it right
how many grams of Br2 are needed to completely convert 15.0g Al to Albr3?
Answer:
For, this question,
The balanced equation is; 2Al + 3 ----> 2Al
We can now, calculate how many grams of will be needed to completely convert 15 g of Al into Al.
Here, the reaction produces, 2 moles of Al
So, For 15.0 g of Al; we can calculate;
(15.0 g Al) X (1 mole Al / 26.98 g Al) X (3 moles / 2 moles Al) X (159.81 g / 1 mole )
= 133 g of will be needed.
Therefore, 133g of will be needed to completely convert 15 g of Al into Al.
Explanation:
Is fireworks exploding a chemical change?
Answer:
Yes
Explanation:
The fireworks explode
Answer:
The explosion of fireworks is an example of chemical change. During a chemical change, substances are changed into different substances. In other words, the composition of the substance changes.
By what means (or force) can the atoms in compounds be separated?
Answer:
chemical means
Explanation:
Compounds can be separated by chemical means physical means boiling pressure
Which of the following are products of the light-dependent reactions of photosynthesis that are utilized in the light-independent reactions?
ATP and NADPH
water and oxygen
oxygen and glucose
carbon dioxide and glucose
Answer:
[tex]\boxed {\tt Oxygen \ and \ glucose}[/tex]
Explanation:
The photosynthesis equation is:
energy+6CO₂+6H₂O--> C₆H₁₂O₆+6O₂
The reactants are light energy, carbon dioxide, and water. The products are glucose and oxygen.
The products of photosynthesis become the products of the light-independent reaction called cellular respiration, which creates useable energy. Therefore, the correct answer is oxygen and glucose.
АМА
H
+
O
HGS
-O-H
H
N-H
H
Single Bond
AMA
H
+
0
-0-H
H
Single Bond
Which of these is an example of an ecosystem service?
A. A mangrove forest protects a coastal village from erosion.
B. A farmer uses non-chemical means to control pests and weeds.
C. A city enacts a law to protect a local lake from runoff pollution.
D. After closing a mine, a company adds soil and plants native grasses in the area.
someone help me asap.
Answer:
A
Explanation:
All of the other options involve cities, farmers, or companies. Those aren't natural occurrences, so A is the answer. The mangroves protect the village without anything being modified about that environment.
Data for CH3COOH(l) + C2H5OH(l) CH3COOC2H5(l) + H2O(l) balance were obtained at 100. The initial concentrations of the reagents are indicated in columns 1 and 2 of the table below and the CH3COOC2H5 concentrations in equilibrium are given in column 3. Calculate H2O and determine the value of KC
Answer:
Kc = 3.94
Explanation:
CH₃COOH(g) + C₂H₅OH(g) → CH₃COOC₂H₅(g) + H₂O(g)
Liquids aren't included in the equilibrium constant, but at 100°C, all four compounds are a gas. So the equilibrium equation is:
Kc = [CH₃COOC₂H₅] [H₂O] / ([CH₃COOH] [C₂H₅OH])
Set up an ICE table for each row and calculate the value of Kc. Then average the results. (See picture.)
Kc ≈ (3.919 + 4.012 + 3.902) / 3
Kc ≈ 3.94
This table shows the mass and volume of four different objects.
A two-column table with 4 rows. The first column titled objects has entries W, X, Y, Z. The second column titled Measurements has entries Mass: 16 grams Volume: 84 centimeters cubed in the first cell, Mass: 12 grams Volume: 5 centimeters cubed in the second cell, Mass: 4 grams Volume: 6 centimeters cubed in the third cell, Mass: 408 grams Volume: 216 centimeters cubed in the fourth cell.
Which ranks the objects from most to least dense?
X, Y, W, Z
X, Z, Y, W
W, Y, Z, X
Z, Y, X, W
Answer:
x, y, w, z
Explanation:
hope it’s right, but i think it is :)
Answer:
x y w z
Explanation:
HURRY
Show step-by-step
2A + 5B --> 3C + D
2.0 mol A and 4.0 mol B react to form 1.8 mol C. What is the PERCENT YIELD of this reaction?
Answer:
Percent yield of reaction is 75%.
Explanation:
Given data:
Moles of A = 2.0 mol
Moles of B = 4.0 mol
Moles of C formed = 1.8 mol
Percent yield of reaction = ?
Solution:
Chemical equation:
2A + 5B → 3C + D
We will compare the moles of A and B with C from balance chemical equation.
A : C
2 : 3
B : C
5 : 3
4 : 3/5×4 = 2.4 mol
Number of moles of C formed by 4 moles B are less thus B is limiting reactant and will limit the yield of C.
Percent yield:
Percent yield = actual yield /theoretical yield × 100
Percent yield = 1.8 mol / 2.4 × 100
Percent yield =75%
1. What fraction of the elements on the periodic table are metals?
Answer:
About 80% of the elements on the periodic table are metals.
Explanation:
Which of the following is an example of hydrogen bonding?
Answer:
water H2O
Explanation:
explain the formation and breakdown of polymers?
Answer: Polymers are broken down into monomers via hydrolysis reactions, in which a bond is broken, or lysed, by addition of a water molecule. ... This is the reverse of a dehydration synthesis reaction, and it releases a monomer that can be used in building a new polymer.
10. Bands of rock on the seafloor showing alternating magnetic orientation indicate Earth's magnetic field has ____.
a. reversed itself in the past
b. weakened
c. becomes stronger
d. remained the same
Answer:
The answer is Reverse Itself In The Past
Determine the length of the object shown.
5.6 cm
5.60 cm
5.600 cm
6 cm
Answer: The length of the object is 5.6 cm.
Explanation:
If 8.500 g of sodium nitrate and 7.500 g of potassium chloride are dissolved in 25.0 mL of water and heated to 80°C no solid Watermain. Using these amounts of potassium chloride and sodium nitrate, calculate the theoretical number of grams of sodium chloride and potassium nitrate that could be formed.
Answer:
Zero grams of NaCl & KNO₃ ... The reagents mixed in aqueous solution would not produce products as no driving force is present; i.e., no precipitate, weak electrolyte or gas decomposition product will form.
Explanation:
NaNO₃(aq) + KCl(aq) => (theoritically) NaCl(aq) + KNO₃(aq)
However all chloride salts from metathesis rxns remain soluble and 100% ionized except for halide derivatives of Hg⁺², Ag⁺ & Pb⁺₂. Further, all NO₃⁻ salt derivatives also remain soluble and 100% ionized.
Technically, metathesis reactions (also known as double replacement rxns) depend upon the formation of a 'driving force' that leaves the reaction system in the form of a precipitate, weak electrolyte (weak acid or weak base) or a gas decomposition product. So, the reaction in this case should be as follows:
NaNO₃(aq) + KCl(aq) => No Reaction
1. Which macromolecules would you need if... you need a quick boost of
energy?
Answer:
[tex]\boxed {\tt Carbohydrate \ or \ monosaccharides}[/tex]
Explanation:
There are 4 main types of macromolecules: lipids, proteins, carbohydrates, and nucleic acids.
If you are looking for some quick energy, the best choice is carbohydrates. Carbohydrates are the easiest for the body to break down and turn into ATP/energy.
There are also different types of carbohydrates. If you want a more specific answer, monosaccharides is the best answer. They are the simplest sugars. Also, glucose is a monosaccharide, and it shows up directly in the cellular respiration formula. If glucose is consumed, the body doesn't have to break it down before starting respiration.
Complete orbital diagrams (boxes with arrows in them) to represent the electron configuration of valence electrons of carbon before and after sp hybridization.
Answer:
Explanation:
Before Hybridization => C: 1s² ⇵ 2s²⇵ 2p₋₁↑ 2p₀↑ 2p₊₁∅
After Hybridization => C: 1s² 2sp¹ 2sp¹ 2p₀¹2p₊₁¹ => 2 hybrid orbitals and 2 unhybridized p-orbitals at the n=2 energy level.
Which object would likely have the least amount of wasted energy?
a hairdryer
a solar cell
a car engine
a hydroelectric dam
Answer:
The answer is solar cell.
Explanation:
It’s the smallest of the 4 choices, the smaller it is the less it wastes.
Answer:
Explanation:
solar cell