Answer:
Physical change: A,C ,D, F, H, I
Chemical Change: B, E, G, J, K
This is a science question. What is the skateboarder’s acceleration?
Answer:
2.4
Explanation:
Divide 7.0 by 3.0 you get 2.333333 then round it of to 2.34
PLEASE HELP
The Octet Rule explains why
A. Atoms form chemical bonds to create compounds
B. The electronegativity of fluorine is higher than chlorine
C. Ionic compounds have high boiling and melting points
D. Valence electrons are used in chemical bonding
E. Valence electrons are used in chemical bonding
It's not D that's all I know. Please answer with an explanation if you know.
Answer:
Explanation:
E
How do the products of chemical reactions compare to their reactants?
Question 5 options:
The products often have completely different properties than the reactants.
The products usually weigh more than the reactants.
The products usually have more atoms than the reactants.
The products are usually more toxic than the reactants.
Answer: The products usually weigh more than the reactants.
Explanation:
Answer:
A
Explanation:
i just took the k12 test
What are isotopes?
A.) Atoms of the same element that have a different number of protons
B.) Atoms of the same element that have a different number of neutrons
C.) Atoms of different elements that have the same number of neutrons
D.) Atoms that are unstable
Answer:
B
Explanation:
Answer:
B. ATOMS OF THE SAME ELEMENT THAT HAVE A DIFFERENT NUMBER OF NUETRONS
Explanation:
Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
I WILL MARK BRAINLIEST!!!!! !!
(picture included with one question ^^^^^^^)
Answer:
type D
balance form .b
Explanation:
n which phase(s) of matter are the atoms closely packed but still able to slide past each other?
gas
liquid
solid and gas
liquid and solid
Answer:
I belive its liquid if I'm right because liquids are packed together when they take shape but they are still able to move.....brainliest???
Answer:
Liquid
Explanation:
Please don't jugde me if I got it wrong
Salt is a common example of a(n) _____________ bond, while Water is a common example of a(n) _____________ bond.
Answer:
salt is ionic bond and water is Polar covalent bond
Explanation:
.Which statement about transition elements is correct?A Their soluble salts usually form coloured aqueous solutions. B They are all in the same group of the Periodic Table. C They are non-metals with high melting points. D They can be mixed together to form compounds
Answer:
A Their soluble salts usually form coloured aqueous solutions
Negative ions have ______ (More or Less) protons than electrons.
Answer:
Less
Explanation: I took the test.
Answer: negative ions have less protons than electrons.
Explanation:
. The model shows Earth in several positions relative to the Sun. In which position is it winter in North America?
True or False: Plants don't have brains, but they still adapt to their environments.
Answer:
True
Explanation:
I just took that last year, and got a100%
True, Plants don't have brains, but they still adapt to their environments.
What is adaptation?Adaptation is a process where they are changing their nature to suit the environment.
We have seen that plants do adaptation according to the environment, as in the summer season their leaves are hanging down but in the rainy season they show blossoms and green leaves. So, according to the environment for the survival and reproduction they adapt their body.
Hence, plants have no brains, but they still adapt.
To learn more about adaptation, visit the below link:
https://brainly.com/question/2396978
In the following reaction, how many grams of H2O are produced if 2.00 g of N2H4 react? N2H4 + 3 O2 ---> 2NO2 + 2H2O
Answer:
2
Explanation:
From this equation, 2 grams are produced.
The mass of H₂O produced from the reaction is 2.25 g
We'll begin by calculating the mass of N₂H₄ that reacted and the mass of H₂O produced from the balanced equation.
N₂H₄ + 3O₂ —> 2NO₂ + 2H₂O
Molar mass of N₂H₄ = (2×14) +(4×1) = 32 g/mol
Mass of N₂H₄ from the balanced equation = 1 × 32 = 32 g
Molar mass of H₂O = (2×1) + 16 = 18 g/mol
Mass of H₂O from the balanced equation = 2 × 18 = 36 g
SUMMARY
From the balanced equation above,
32 g of N₂H₄ reacted to produce 36 g of H₂O.
Finally, we shall determine the mass of H₂O produced by the reaction of 2 g of N₂H₄From the balanced equation above,
, 32 g of N₂H₄ reacted to produce 36 g of H₂O.
Therefore,
2 g of N₂H₄ will react to produce = (2 × 36) / 32 = 2.25 g of H₂O
Thus, the mass of H₂O produced from the reaction is 2.25 g
Learn more: https://brainly.com/question/13403073
Which is NOT a shape of epithelial cells?
A.Cuboidal
B.Columbar
C.circular
D.squamous
Some things that can be made from coal are...
A. All of the above
B. Tar
C. Generating power
D. Plastics
E. Fertilizer
Answer:A
Explanation:just casuse
The rate of change of position (or distance traveled) with respect to time"
Answer:
Velocity...I believe
Answer: velocity or meters per second
Explanation:
3 way to make bases
what happens to the electronegatity when you go from top to bottom on the periodic table?
Answer:
It decreases
Explanation:
As you go down a group from top to bottom, the electronegativity decreases. Across a period, electronegativity increases from left to right.
Electronegativity is the tendency with which the atoms of the element attracts valence electrons in a chemical bond. The more electronegative an element is, the stronger its affinity for electrons. Electronegativity values less than 2 shows an element is a metal. Metals are generally electropositive.Determine the mass of 2.86 mole Co(NH3)6Cl3
Answer:
765 g Co(NH₃)₆Cl₃
General Formulas and Concepts:
Reading the Periodic Table of ElementsExplanation:
Step 1: Define
2.86 mol Co(NH₃)₆Cl₃
Step 2: Define conversions
Molar Mass of Co - 58.93 g/mol
Molar Mass of N - 14.01 g/mol
Molar Mass of H - 1.01 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of Co(NH₃)₆Cl₃ - 58.93 + 6(14.01) + 18(1.01) + 3(35.45) = 267.52 g/mol
Step 3: Dimensional Analysis
[tex]2.86 \ mol \ Co(NH_3)_6Cl_3(\frac{267.52 \ g \ Co(NH_3)_6Cl_3}{1 \ mol \ Co(NH_3)_6Cl_3} )[/tex] = 765.107 g Co(NH₃)₆Cl₃
mol Co(NH₃)₆Cl₃ and mol Co(NH₃)₆Cl₃ cancel outWe are left with grams (mass)Step 4: Simplify
We are given 3 sig figs. Follow sig fig rules.
765.107 g Co(NH₃)₆Cl₃ ≈ 765 g Co(NH₃)₆Cl₃
Match each term with the correct description below.
1. what is a charged atom that has gained one or more electrons?
2. What substance is held together by ionic bonds?
3. What metal and nonmetal transferrers electrons?
4. What particle has electrons that are shared unequally?
5. What forms when atoms share electrons by covalent bonds?
6. What two nonmetals share electrons?
7. What charge atom that has lost one or more electrons?
8. What two or metals "pooling" electrons?
a. metallic bond
b. covalent bond
c. anion
d. ionic bond
e. molecule
f. cation
g. compound
h. polar molecule
Answer:
1. anion
2. compund
3. ionic bond
4. polar molecule
5. molecule
6. covalent bond
7. cation
8. metallic bond
Explanation:
Elements that are generally shiny when smooth and clean.
Learning Task No. 3: Write a short paragraph regarding the differences between
saturated and unsaturated solutions.
Type of Solution
Explanations about the differences of
the two solutions
Saturated solution
Unsaturated solution
Answer:
See explanation
Explanation:
A saturated solution is a solution that contains just as much solute as it can normally hold at a given temperature in the presence of undissolved solute. An unsaturated solution contains less solute than it can normally hold at a given temperature. A saturated solution can not dissolve more solute whereas an unsaturated solution can comfortably dissolve more solute until it attains saturation at a specified temperature.
please help ASAPPP
will mark brainliest!!!
The polyatomic ions are those ions which has more than two atoms involved such as the other options than OH^-1 in the question. The OH^-1 ion is the diatomic ion because it has only 2 atoms
______________________________________HOPE IT HELPS!the following body systems is responsible for releasing waste?
Answer:
the urinary system??
Explanation:
The three types of symbiosis are ___ and ___
Answer:
mutualism,commensalism and parasitism
Answer:
mutualism, commensalism, and parasitism
I need help (yes again)
Answer:
with what?
Explanation:
Question 6 (1 point)
Sound, earthquakes, and waves in water are rechanical waves because they require
a physical to transport energy. (Lesson 4.02)
O electromagnetic field
O disturbance
O medium
location
Answer: The answer is MEDUIM
Explanation:
Atoms that gain
an electrons
have a _____
Charge?
Answer:
positive
Explanation:
How many electrons does each atom have? What group is each in?
In an atom, the electron's spin around the center, also called the nucleus. The electrons like to be in separate shells/orbitals. Shell number one can only hold 2 electrons, shell two can hold 8, and for the first eighteen elements shell, three can hold a maximum of eight electrons. ( This is the answer to both questions!)
This is a change in an objects motion caused by an unbalanced force
Answer:
This is a change in an objects motion caused by an unbalanced force.
- Acceleration
Answer:
Pressure
Pressure is done when a force is applied to an object to course a motion
Could cellular respiration
happen without photosynthesis? Explain your
reasoning
Answer:
No
Explanation:
Without photosynthesis, there would be no sugar, without which there could be no cellular respiration.Both animal cells and plant cells depend on cellular respiration for their energy needs, because both animal cells and plant cells need ATP.
