Answer:
thanks remember thats what you said to me c:
Explanation:
Round off the measurement 0.002 015 5 m to three significant figures.
Answer:
0.002
Explanation:
The significant figures of a number are digits that are meaningful in trying to resolve a given value. These are actually digits that carry meaning in a given number.
Let s look at 0.002, the zero before the decimal point carries no real meaning in the number. However, the zeros that precede 2 are all meaningful because the occupy the tenth and hundreth place values.
Hence, there are three significant figure in 0.002.
Answer:
Explanation:
Boi
ik its confusing so you can just go to the pdf
1. Which letters show the balls with the maximum potential energy? A D E G 2. Which letter shows the ball with the maximum kinetic energy? B C D G 3. Which letters show the balls with the least kinetic energy? A B F G 4. Which letter shows the ball with the least potential energy? C D E G 5. Which letters show the balls with a little less kinetic energy than ball C? A B D F 6. Which letters show the balls with a little more potential energy than ball D? C D E F 7. Which letters show the balls with a little more potential energy than ball F? A C E G 8. Which letters show the balls with a little less potential energy than ball G? A B F G 9. Which letter shows the ball with a little more kinetic energy than ball C? B C D F 10. Which letter shows the ball with a little less potential energy than ball E? B D E F 11. What TWO things decide the amount of kinetic energy an object can have? ______________________________________________ 12. Name two other things that can show kinetic and potential energy in action.
1 A
2 C
3 G
4 D
5 E
6 A and G
7 D and E
8 F
9 B
10 C
11 if it is in motion and how much motion it has
12 a bow being pulled back shows potential and dropping a ball can chow kinetic
IM SO SRRY don't feel bad
Answer:
I’m sad
Explanation:
I need help on this please
Elements that can be very dangerous but form useful materials when combined with other elements
Answer Choices:
Atomic Mass
Atomic Number
Halogens
Metals
Noble Gases
Non - Metals
Answer: Halogens
Explanation:
Halogens include elements like Fluorine, Chlorine, Iodine and Bromine. These elements can be dangerous to humans especially when used in large quantities.
When combined with other elements however, they can form very useful materials. Chlorine for instance forms salt when combined with sodium. Fluorine becomes very useful in toothpaste to protect teeth and bromine can be used in pesticides.
what happens when you add a proton to a hydrogen atom
Answer:
The Hydrogen Atom
The atom consists of a proton and an electron held together by the electromagnetic force between the positively charged proton and the negatively charged electron. If we add a proton to the hydrogen nucleus we would get helium (a different element). Here are two common isotopes of helium.
How many days does it take for 16 g of palladium-103 to decay to 1.0 g? The half-life of palladium-103 is 17 days.
Answer: It will take 68 days for the palladium to decay.
Explanation: ima smart dude
which metal is liquid and has silvery-white color.
Answer:
Mercury
Explanation:
It is also highly toxic
What is the molecular formula of gypsum salt ?
Gypsum is composed of calcium sulphate (CaSO4) and water (H2O). Its chemical name is calcium sulphate dihydrate (CaSO4. 2H2O).
Iodine is an elemnt, but is Iodide an element or it is a compound?
Answer: element
Explanation:
It only has one type of atom making it a element
Cells are differentiated when
A they divide
B they grow in size
C genes are turned on or off
D they all perform the same function
Answer:
D I think.............
Why do you think it is difficult to tell that a plate beneath it moving right now
Magnetism is an example of a property of what?
A) behavior
B)chemistry
C)flammability
D) mass
Answer:
A) behavior
Explanation:
What is the definition of a community in environmental science
Based on the electron configuration of the two
atoms, predict the ratio of metal cationic (+) atom
to nonmetal anionic (-) atom in the compound.
Sodium 1s22s22p63s1
Bromine 1s22s22p63s23p64s23d104p5
A. 1:1
B. 1:2
C. 2:1
D. 3:1
Answer:
1:1
Explanation:
Answer:
It's option B, 1:2
Explanation:
I have the same problem, and it was marked correct when I clicked on option B.
Which of these elements is the most reactive
Answer:
What elements?
Explanation:
The alkali metals are softer than most other metals. Cesium and francium are the most reactive elements in this group. Alkali metals can explode if they are exposed to water.
Not sure if this what you were talking about but here
This from google btw not gonna lie
The lowest parts of a transverse wave are called
1.Transversals
2.summits
3.troughs
4.crest
EMERGENCY! WILL GIVE 100 POINTS AND BRAINLIEST TO FASTEST CORRECT ANSWER!
Write chemical equations for the following single-replacement reactions that might occur in water. If no reaction occurs, write NR in place of the products.
a.) nickel + magnesium chloride
b.) calcium + copper (II) bromide
c.) potassium + aluminum nitrate
d.) magnesium + silver nitrate
Answer:
Explanation:
A) No reaction occurs. It is really hard to replace Mg once a reaction has taken place. (NR)
B) Ca + Cu(ii)Br2 ==> Cu + CaBr2. Calcium only ionizes to Ca2+
C) 3K + Al(NO3)3 ===> Al + 3KNO3 Potassium is very reactive.
D) Mg + AgNO3 ====> Mg(N03)2 + Ag
What is the molecular formula of phosphorus pentooxide ?
Answer:
P4O10Explanation:
................
Answer:
P₄O₁₀
Explanation:
The molecular formula of phosphorus pentooxide is P₄O₁₀
Decide whether each scenario describes intermolecular forces or intramolecular forces.
A polar covalent bond joins the hydrogen and
nitrogen atoms in ammonia (NH3).
a. intramolecular
b. intermolecular
Answer:
Intramolecular
The follow up answer for "The two strands of a DNA molecule are separate molecules that are held together by weak electrostatic attractions." is Intermolecular.
The next answer is Intermolecular
The scenario describes intramolecular forces.
What are intramolecular forces?Intramolecular forces are the forces that keep atoms together inside a molecule. Intermolecular forces are forces that exist among molecules. determine intermolecular appeal between H-Cl molecules and intramolecular attraction within H-Cl molecules.
What are the strongest intramolecular forces?The most powerful intermolecular forces are dipole-dipole interactions. A dipole-dipole pressure is while the high-quality aspect of a polar molecule draws the bad facet of every other polar molecule.
Learn more about intermolecular forces here: https://brainly.com/question/25920008
#SPJ2
PLEASE HELP!! I GIVE BRAINLIEST
1)Which process represents chemical change?
A. A lake freezes over into ice.
B. A metal bar is rolled into a flat sheet.
C. Vinegar bubbles when baking soda is added. D. Sand, water, and salt combine to form a mixture.
2)Which process is an example of a physical change?
A. Carrots are cut into small pieces and mixed into a salad.
B. A peanut butter sandwich is eaten and broken down by enzymes in the stomach.
C Sodium metal and chlorine gas are combined to form sodium chloride, or table salt.
D. Sodium metal and water are combined to form a basic compound and a flammable gas.
3) Which of the following is a chemical change?
A. Water boiling
B. Paper being cut
C. Ice melting
D. rusting
4) Which of these is a clue that a chemical change has occurred?
A. A beaker suddenly becomes very warm when you mix two room-temperature it.
B. A liquid forms bubbles when it reaches a high temperature.
C. Water changes color when you add food coloring to it.
D. Sugar crystals disappear when dissolved in water.
5) To cause a chemical change in wood, you can ...
A. Break it.
B. Burn it.
C. Cut it.
D. Saw it.
6) Which of the following is not a good indication that a chemical change has occurred?
A. The formation of gases
B. A change in color
C. A scratched surface
D. The release heat or light
Answer:
1)C 2)B 3)D
Explanation:
1. The process represents chemical change is vinegar bubbles when baking soda is added.
2. The process is an example of a physical change is carrots are cut into small pieces and mixed into a salad.
What is physical and chemical change ?The appearance or form of matter changes during a physical change, but the type of matter in the substance does not.
A chemical change, on the other hand, changes the type of matter and creates at least one new substance with new properties.
3. Rusting is a chemical change.
4. A beaker suddenly becomes very warm when you mix two room-temperature it is a clue that a chemical change has occurred.
5. To cause a chemical change in wood, you can burn it.
6. A scratched surface is not a good indication that a chemical change has occurred.
Thus, The process represents chemical change is vinegar bubbles when baking soda is added.
To learn more about the physical and chemical change, follow the link;
https://brainly.com/question/11321843
#SPJ5
Triangle ABC has been dilated about point A by a scale factor of One-third. Triangle A B C. Side A C has a length of 39, side A B is 30, side C B is 48. Triangle A prime B prime C prime. What are the lengths, in units, of the three sides of Triangle A prime B prime C prime? 10, 12, 13 10, 16, 13 90, 124, 97 90, 144, 117
Answer:
10, 16, 13
Explanation: I just took the test and it was correct :)
Why do non-metals bond with each other to form covalent compound?
Answer:
Explanation:
Because unlike ionic bonds (metal and a non-metal) where electrons are "stolen", covalent bonds are defined by the sharing of electrons between non-metals.
9. A graduated cylinder is filled with water to a level of 40.0 mL. When a piece of copper is lowered into the cylinder, the water level rises to 63.4 mL. Find the volume of the copper sample. If the density of the copper is 8.9 g/cm3, what is its mass?
Answer:
Mass = 208.26 g
Explanation:
Given data:
Volume of water = 40.0 mL
Volume of water + copper = 63.4 mL
Volume of copper = ?
Density of copper = 8.9 g/cm³
Mass of copper = ?
Solution:
Volume of copper:
Volume of copper = (Volume of water + copper ) - Volume of water
Volume of copper = 63.4 mL - 40.0 mL
Volume of copper = 23.4 mL
Mass of copper:
density = mass/volume
8.9 g/cm³ = mass/23.4 mL
cm³ = mL
Mass = 8.9 g/mL × 23.4 mL
Mass = 208.26 g
Which one will diffuse faster Ammonia or carbon dioxide Why?
jcp-fnoa-kzk join here
How many molecules of ammonia will be produced?
4
2
8
6
Answer:
4
Explanation
i just know the answer
does anyone know this?
Answer:
1.24 moles
Explanation:
first find the molar mass of AgNO3, which I got 169.877
then, divide the number of moles used by the Molar mas
210/169.877 = 1.2361 = 1.24
Since, the molar ratios of AgNO3 and Ag are the same (2:2), the answer will be 1.24
Hanif thought that more heat energy has been given out in his reaction and noor thought that both reactions gave out same amount of heat. Whose idea is correct and why?
Answer:
This question is incomplete but the missing part is in the document attached
Noor's idea is correct
Explanation:
Noor's idea is correct. This is because the temperature rise in the two experiments are the same and can be calculated as follow
Hanif's experiment: 45 - 21 = 24 °C
Noor's experiment: 42 - 18 = 24 °C
Thus, the correct idea is both reactions gave out same amount of heat
it's the third pic
A student used the Dumas method to determine the molar mass of a volatile material. They placed the container into the ice bath BEFORE all of the material was vaporized. What will happen to their final calculations?
A. The Molar Mass will be too low.
B. The Molar Mass will not be effected.
C. The Molar Mass will be too high.
Answer: the molar mass will be too high
Explanation:
When salt is added to water, the entropy, S,
of the system can be described by an
inequality.
Ssolution > Swaler + Ssalt
According to the inequality, what increases
when salt is added to the water?
A. Internal energy
B. state of disorder
C. number of particles
D. strength of attraction between particles
Answer:
C. number of particles
Explanation:
Entropy is the measure of disorderliness of a system. Remember that when you dissolve salt in water, you increase the number of particles in the solution. The greater the number of particles in solution, the greater the entropy of the solution system.
Hence dissolution of a salt in water increases the entropy by increasing the number of particles in solution leading to the inequality; Ssolution > Swater + Ssalt.
