Answer:
what problem?
how many atoms are in 4 Mg(OH)2 ?
Answer:
20 atoms
broo this is easy plz give me harder questions smh
[
An atom, which is an isotope of an element, is characterized by -
O having more electrons in its nucleus.
O having more neutrons in its nucleus.
having fewer protons in its nucleus.
having more protons in its nucleus.
Answer:
gime fre points
Explanation:
fre points for me!
If Beryllium has a mass number of 7 and atomic number of 4, how many protons does it have?
Answer:
4
Explanation:
Answer:
4
Explanation:
So the atomic number is still the proton number and it is always smaller than the atomic mass so the proton number is 4.
HOPE IT HELPED
Which pair of substances would most likely result in the production of a solid when reacting with a base?
Answer:
metal salts, and carbon dioxide
Explanation:
Describe the motion of molecules in each of the three states of matter.
Answer:
EASSSSSYYY give me a harder question smh
if you want you can give me Brainliest answer lol
Explanation:
A solid’s particles are packed closely together. The forces between the particles are strong enough that the particles cannot move freely.
A liquid is a fluid that conforms to the shape of its container but that retains a nearly constant volume independent of pressure. The volume is definite (does not change) if the temperature and pressure are constant.
Gas molecules have either very weak bonds or no bonds at all, so they can move freely and quickly. Because of this, not only will a gas conform to the shape of its container, it will also expand to completely fill the container.
which group contains most elements
Answer:
group 8 (group 0)
just take a look at the periodic table
how many significant figures in 1. 19.99 2. 140486 3. 0.0609 3. 5.08 ?
1. 4 significant numbers
2. 6 significant numbers
3. 3 significant numbers
4. 3 significant numbers
Further ExplanationSignificant numbers are numbers obtained from the measurement results of exact numbers and the last number estimated
1. 19.99
all non-zero numbers are significant numbers , so there are 4 significant numbers
2. 140486
a zero which is located between two non-zero numbers including a significant number , so there are 6 significant numbers
3. 0.0609
a zero in front of a decimal point is not a significant number, so there are 3 significant numbers (6,0 and 9)
4. 5.08
Any zeros between two non-zero numbers are significant, so there are 3 significant numbers(5,0 and 8)
How many grams are there in 1.18 X 1026 atoms of iridium?
Fill in the blank.the amount which an object accelerates depends on the mass of the object on the size of the ____ acting upon it
I need help I’m struggling
Answer: Force
Explanation:
Answer:
force
Explanation:
Measure of the energy
released during an
earthquake.
Answer:
The magnitude of an earthquake, usually expressed by the Richter Scale, is a measure of the amplitude of the seismic waves
Explanation: The moment magnitude of an earthquake is a measure of the amount of energy released - an amount that can be estimated from seismograph readings
If 0.243 g of magnesium is reacted with hydrochloric acid, the amount of acid required would be:
Answer
0.496g
Explanation:
All you have to do in this problem is multiply .243 g by 2.04, which is the universal shortcut for these acid problems.
Pleaseeee help meeeee
Answer:You have it right the answer is c!
Explanation:
Answer:
c ........................!
PLS HELP:)Which situation will cause a stationary object to start moving?
A. A net force greater than 0
B. Balanced forces
C. A net force equal to 0
D. Two forces that cancel each other out
PLEASE HELP ME FAST THANKYOU! :)
What is a substance said to be if it evaporates easily?
A.crystallized
B.condensing
C.changing pigmentation
D.volatile
Write the chemical formula for Calcium Dichromate
Ca Cr2O7^2 -
2 2
2 2
1 1
=CaCr2O7^2 -
Is this right? Or does the second part have a bracket
Answer:
Its right
Explanation:
The chemical formula of calcium dichromate is CaCr207
i give brainliest help pls
The answer is a compound.
Hope this helps! :)
The sphere was dropped into water in a graduated cylinder as shown below
Answer:65 ML
Explanation:
Did you title your lab report?
Did you state the purpose of the investigation?
Did you include a brief overview of the investigation?
Materials and Procedure
Did you make a list of materials? Did you include quantities and SI units?
Did you present the steps of the procedure as a numbered list?
Did you note any changes to the original procedure?
Which of the following can be inferred from the diagram above that shows the dependence of potential Energy on the Internuclear distance between two atoms?
A - The atoms form a bond with a bond length of 25 pm
B - The atoms form a bond with a bond length of 75 pm
с - The net force between the atoms is attractive at 25 pm
D - The net force between the atoms is attractive at 75 pm
Answer:
B - The atoms form a bond with a bond length of 75 pm
From the potential energy diagram of shown, we can infer that the atoms form a bond with a bond length of 75 pm.
When atoms are far away from each other, there exists no interaction whatsoever between the atoms.
However, as the atoms draw closer to each other, the potential energy diagram begins to shift towards an energy minima as we can see from the potential energy diagram.
As the system continues to tend towards this minima, the distance between the atoms decreases. The distance at which the two atoms have the lowest energy is called the bond length.
For this system, such a bond length occurs at 75pm as we can see from the diagram.
Learn more: https://brainly.com/question/24275269
if you were conducting an experiment to see whether eating candy makes gerbils fat, what variable might you change?
A:The number of gerbils you feed incorrect answer
B:The amount of candy the gerbils eat incorrect answer
C:The amount of water the gerbils drink incorrect answer
D:The body mass of the gerbils incorrect answer
Answer:
B
Explanation:
the less candy will be the smallest gerbil and the most candy will be the fatest
Answer:
A) The number of gerbils you feed
Explanation:
If you wanted to test whether eating candy made gerbils fat you would need to fluctuate the amount of candy each group receives to observe whether there was any differnce in weight
I will mark whoever gets it right most brainliest (25 point question)
What is the name of the ionic compound CaCN?
Hint: It's not Calcium Cyanamide
Answer: Calcium Cyanide?
Explanation:
Which is not a chemical element needed to build sugars?
Answer:
Nitrogen
Explanation:
which of the following CANNOT be classified as a substance? A. table salt B. air C. nitrogen D. gold
Answer:
C. Nitrogen
Explanation:
All of the other options are mixtures making them substances, but nitrogen is an element. (while gold is an element, there are often times that gold is mixed with other elements, creating a substance)
P2O5 is a covalent compound used to purify sugar. How many atoms of phosphorus does this compound have? How many atoms of oxygen does this compound have?
Lol please help :')
Answer:Phosphorus: 2
Oxygen:5
Explanation:
Just did it
Answer:
Phosphorus: 2
Oxygen:5
Explanation:
Based on your knowledge of chemical equations, what do you know for sure
about this equation?
Pls help I need it I’m dumb but I do need it! *here a pic*
first proposed that Earth and the other planets orbit the sun.
OA.) Hubble
OB.) Galileo
OC.) Copernicus
OD.) Kepler
ANSWER QUICK PLEASEE
How are hypotheses different from theories?
Answer:
Explanation:
This is the Difference Between a Hypothesis and a Theory. In scientific reasoning, a hypothesis is an assumption made before any research has been completed for the sake of testing. A theory on the other hand is a principle set to explain phenomena already supported by data.
What is the buoyancy force on a 15 g object which displaces 60 mL of water? (Remember to change mL of water to grams and grams to kg)
25 N
0.59 N
900 N
0.25 N
Answer:
0.25
Explanation:
Answer:
.59
Explanation:
what is the scientific method?
A) the process of proving a theory
B) a way of analyzing data
C) a method of testing an idea
D) the steps required to form a hypothesis
Answer:
C- a method of testing an idea
In the compound nickel(II) sulfide, there is always 58.7 g of nickel for every 32.1 g of sulfur. What is the simplified ratio of
nickel to sulfur?
answer: 1.83 to 1
or at least that’s what i got
