Answer:
please give me brainlist and follow
Explanation:
The Zeff for 3d electron of Cr 4s electron of Cr 3d electron of Cr+3 3s electron of Cr+3 are in the order respectively (1) 4.6, 2.95, 4.95, 8.05 (2) 4.95, 2.95, 4.6, 8.08 (3) 4.6, 2.95, 5.3, 12.75 (4) 4.6, 2.95, 5.3, 12.65. here zeff is the effective nuclear charge.
A sample of gas has a volume of 12.0L and a pressure of 2.00 atm. If the pressure of gas is increased to 6.00 atm, what is the new volume of the gas?
A. 2L
B. 4L
C. 16 L
D. 8L
Answer:
B; 4 L
Explanation:
From the Boyle’s law of gases, the volume occupied by a given mass of gas is inversely proportional to the pressure exerted by the gas
Mathematically, we have this as;
PV = K
Given;
P1 = 2 atm
V1 = 12 l
P2 = 6 atm
V2 = ?
We have that;
P1V1 = P2V2
2 * 12 = 6 * V2
V2 = (2 * 12)/6
V2 = 24/6
V2 = 4 L
What is the boiling point of 1 cup of water with 6 tablespoons of salt?
Explanation:
best answer i could say was this
Eglin land animals have evolved to produce eggs with the tough shells to ensure that
A.external fertilization can take place
B. The egg and the sperm can fuse
C. Parental care is unnecessary
D. The developing embryo does not dry out
Answer:
c
Explanation:
parrntal care is unnecessary
Answer: well, I think the answer is D
Explanation: I mean it is for protection, but it doesn't do a very good job but to not let the embryo dry out in land it does a good job at that
"What is the potential energy relative to the water surface of a diver at the top of a 26 m
high diving platform? Suppose she has a mass of 35 kilograms."
Answer:
PE = 8918 J
Explanation:
Formula for potential energy here is;
PE = mgh
Where;
m is mass
g is acceleration due to gravity
h is height
We are given;
m = 35 kg
h = 26 m
Thus;
PE = 35 × 9.8 × 26
PE = 8918 J
1. Name two organisms that are competing for energy and explain HOW they compete.
Answer:
There could be a few answers for this question, but my answer would be two different plants. Maybe a bush on the ground fighting for the energy of the sun with a tall tree. Leaves collect the energy from the sun and convert it to energy usable for the plant. a bush on the ground would be fighting for the sunlight with a tall tree.
What is a way of moving electricity along a path called? *
battery
circuit
static electricity
electrons
More than half of the elements are in which state of matter at room temperature?
What happens to the atomic mass when the atomic numbers increase?
Which elements does not belong to a main group of elements?
Please help I really need help!!
Answer:gas
Explanation:
How is a molecule different
from an element?
A. An element is made of more than one
type of atom.
B. A molecule has properties different
from the elements making up the
molecule.
C. An element shares electrons and a
molecule does not.
Answer:
A
Explanation:
Molecule is a substance with two or more atoms bonded together such as the oxygen humans breathe (O2). Elements are pure substances made up of all the same atoms such as gold (Au), hydrogen (H), and oxygen (O). Elements all have the same number of protons in their nuclei and can't be broken down.
The asthenosphere flows because of
How many molecules are in 0.55 moles of Cu(NO3)2?
3.3 × 10²³ molecules Cu(NO₃)₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
0.55 mol Cu(NO₃)₂
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[DA] Set up: [tex]\displaystyle 0.55 \ mol \ Cu(NO_3)_2(\frac{6.022 \cdot 10^{23} \ molecules \ Cu(NO_3)_2}{1 \ mol \ Cu(NO_3)_2})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 3.3121 \cdot 10^{23} \ molecules \ Cu(NO_3)_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
3.3121 × 10²³ molecules Cu(NO₃)₂ ≈ 3.3 × 10²³ molecules Cu(NO₃)₂
What consist of a solid matter?
how many grams of carbon tetrachloride can be produced from reacting 709.0 grams of chlorine (CI2) with excess methane?
What are the three major Eras from 600 million years ago to today
Answer:
he Paleozoic, Mesozoic, and Cenozoic.
Explanation:
is lion decomposer consumer or a producer ?
Make a song give me some bars
Answer:
Make me a song give me some bars wait am i rappin to hard livin life high crazy right touch on her shhh f in th mhm aint waistin no time lets get into it tonight
Explanation:
Dogs are derived from wolves. Today, dogs are very diverse, varying in size from very small to very large. What led to this variety
1 - selective breeding
2- cloning
3- Genetic Engineering
4- Natural Selection
Answer:
1
Explanation:
i think but yes
Dogs are derived from wolves. Dogs are very diverse, varying in size from very small to very large. The variety is because of selective breeding. Hence option 1 is correct.
What is selective breeding?Selective breeding is defined as the method by which people pick which male and female animals or plants would reproduce sexually and create offspring together in order to selectively acquire specific phenotypic features. The goal of selective breeding is to produce cattle with desirable features that are strongly heritable and can thus be passed down from generation to generation.
Despite the fact that all dogs are descended from wolves, people have significantly changed the appearance of dogs through the use of artificial selection. Dogs have been bred for various desirable traits for ages, resulting in a vast variety of canines, from the little Chihuahua to the enormous Great Dane.
Thus, dogs are derived from wolves. Dogs are very diverse, varying in size from very small to very large. The variety is because of selective breeding. Hence option 1 is correct.
To learn more about selective breeding, refer to the link below:
https://brainly.com/question/461245
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1. The type of bond most likely to
occur between Mg and Br is a(n)
bond.
---
Answer:
Ionic bond.
Explanation:
Group 7 elements like Bromine (Br) and group 2 elements like Magnesium,(Mg) involved loss and gain of electrons which is typical with Ionic bonding.
13) CO2
# of molecules:
# of elements:
# of
Name of element:
atoms:
Total # of atoms:
The #2 is a
coefficient or subscript!
Answer:
1023 mole or just 1
2 elements
1 atom of carbon and 2 atoms of oxygen
2 I believe
and I think the 2 is a subscript
The volume of a gas
if it is compressed.
increases
stays the same
decreases
Help me please
C2H6 + Cl* => C2H5* + HCl
Answer:
C2H6 + Cl → C2H5 + HCl
equation is balanced
Read the question and help me with the answer please
PLEASE HELP What's the mass in grams of 0.442 moles of calcium bromide, CaBr2? The atomic
weight of Ca is 40.1 and the atomic weight of Br is 79.9.
A) 452.3 g
B) 53.04 g
C) 44.2 g
D) 88.4 g
Answer: Thus there are 88.4 g of calcium bromide.
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
Molar mass of = 40.1 (1)+ 2(79.9) = 199.9
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
[tex]0.442=\frac{x}{199.9}[/tex]
[tex]x=88.4g[/tex]
Thus there are 88.4 g of calcium bromide.
What is the correct IUPAC name for Al(IO₃)₃?
Answer:
Aluminum Iodate
The IUPAC name of Al(IO3)3 is diiodyloxyalumanyl iodate.
What is IUPAC name ?The systematic method of nomenclature of the organic or inorganic compound on the basis of International Union of Pure and Applied Chemistry.
To learn more about IUPAC name here.
https://brainly.com/question/16631447
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How much will this EROSION change the elevation at location W, to the nearest meter?
Answer:
1,329
Explanation:
As a chemist for an agricultural products company, you have just developed a new herbicide,"Herbigon," that you think has the potential to kill weeds effectively. A sparingly soluble salt, Herbigon is dissolved in 1 M acetic acid for technical reasons having to do with its production. You have determined that the solubility product Ksp of Herbigon is 9.00×10−6.
Although the formula of this new chemical is a trade secret, it can be revealed that the formula for Herbigon is X-acetate (XCH3COO, where "X" represents the top-secret cation of the salt). It is this cation that kills weeds. Since it is critical to have Herbigon dissolved (it won't kill weeds as a suspension), you are working on adjusting the pH so Herbigon will be soluble at the concentration needed to kill weeds. What pH must the solution have to yield a solution in which the concentration of X+ is 1.50×10−3 M ? The pKa of acetic acid is 4.76.
i hope i helped for this problem
The number 875000 written in scientific notation would be
Answer:
8.75 x 10^5
Explanation:
hope this helps
Every day Sam goes to Dunkin' Donuts and orders a medium iced Coffee with four sugars OR he orders a hot
coffee with four sugars.
He notices that the iced coffee is never as sweet as the hot coffee. Why is this? Use complete sentences and
unit vocabulary to explain.
2. Germ cells are found in the
A. heart
B. lungs
C. muscles
D. ovaries
Answer:
D- located in ovaries...
Which part of an atom has a neutral or no charge?
Answer:
Neutron
Explanation:
Neutrons has a neutral or no charge.
4. Ms. Desabille bought pork meat for P205.00 per kilo , about how much did she pay for 7.5 kilos?
A. P 1500.00 B. P1600,00
C. P 1400.00
DP 1300.00
5. If gasoline costs P49.65 per liter and your tank holds 50.35 liters , then about how much will you pay to full
your tank?
A P 2 500.00 B. P2 400.00
C. P2 300.00
D. P 1 500.00
6. Mr. Bernard travels 5.12 km per hour on his bike. How far can he travel in 3.25 hours?
A 1.664 km B. 166.4 km
C. 16.64 km
D. 1664
7. Mrs. Allysa purchased 48 pencils at P 4.50 each. How much did she pay for all the pencils?
A P 261.00 B. P 162.00
B. P 216.00
D. 612.00
8. The Villaroel family bought a 125.65 square meter lot at P 4500.00 per square meter. How much did they
pay?
A. P556 425 B. P 565 425
C. P 556 452
D. P 655 425
9. What is 2.7 - 10?
A 2.70
B. 0.027
C. 0.27
D. 27
10. What is 98.75 + 4?
A. 24. 6877 B. 24.6885
C. 24.6865
D. 24.6875
11. A store owner has 63 kilograms of candy. If she puts the candy into 21 jars, how much candy will each ja
contain?
A. 4 kg
B. 3 kg
C. 0.4 kg
D. 0.3 kg
12. It is the quantitative relation between two amounts showing the number of times one value contains or is
contained within the other.
A. proportion B. ratio
C. number
D. quantity
math ito
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