Answer:
jupiter
Explanation:
mercury, venus, earth, mars, jupiter, saturn, uranus, neptune,
A student did an investigation to determine the effect the amount of air would have on plant growth. She planted identical
plants in 4 separate closed containers with different volumes of air. She measured the height of the plants after they had
grown for 3 weeks.
What is the dependent (responding) variable in her investigation?
Answer:
Explanation:
The responding variable always is measured against the variable that you have control over.
In this case, you have control over the volume of air.
The responding variable is the amount the plant has grown. This would be a good long term experiment to try for a science fair or just because you might be interested. It's a good simple idea.
Hi, help with these two questions.
1. Write the isotope notation for an atom with 9 protons and an atomic mass of 20.
2. Write the isotope notation for an atom with 13 protons and 12 neutrons.
Answer:
Answered below
Explanation:
1) Atomic number is usually the number of protons
Since the atom is a neutral atom, Number of protons is equal to the number of electrons.
Thus means that we have 9 electrons and our atomic number is 9.
Atomic mass number is given as 20.
The is topic notation makes use of the atomic number and mass number.
Atomic number of 9 denotes fluorine.
Thus, the isotopic notation is written as attached;
2) we are told that an atom has 13 protons and 12 neutrons.
Similar to A above,
Atomic number is 13.
Now, number of neutrons + number of protons = mass number.
Thus;
Mass number = 13 + 12 = 25
Element with atomic number of 12 is magnesium
Thus,isotopic notation is as attached.
What would the world be like without elements? please
Answer:
It would be nothing. Quite literally nothing. No Oxygen, no dirt, no anything.
Explanation:
Answer:
Nothing
Explanation:
Everything we have in our world is made up of elements. Without them, we would have nothing.
(Popcorn Stand) A salt shaker has 2.91 moles of NaCl, how many grams of NaCl are in the salt shaker?
Answer:
170 grams NaCl
Explanation:
Find the mass of NaCl by adding the two elements atomic mass
Na: 22.99
Cl: 35.45
22.99+35.45=58.44 g
Convert moles to grams.
2.91 mol NaCl * 58.44 g NaCl= 170.0604 g
b. MgF2
Name the compound
Answer:
Magnesium Difluoride
Explanation:
Mg = magnesium
F = fluoride
F2 = difluoride (prefix "di" indicates 2)
How do the atomic number and the mass number of an element
change after beta decay?
A. Atomic number stays the
same; mass number
increases by 1.
C. Atomic number increases by
1; mass number stays the
same.
B. Atomic number stays the
same; mass number
decreases by 1.
D. Atomic number decreases by
1; mass number stays the
same.
Answer:
A.
Explanation:
I think it’s D but I’m not sure.. Please help!
Answer: I think it’s D?
Explanation:
Answer:
D.
Explanation:
Weathering, erosion and deposition are processes that can wear a mountain down.
Can someone help me with number 3 thanks
Answer:
Difficult Question but I would say no
Explanation:
I say no because the whole premise of a chemical reaction is the reaction to new bonds and bond losses happening due to the introduction of a new substance. If the substance hasn't changed at all, it wouldn't be a chemical reaction because their would be nothing reacting.
describe a difference in our inner planets and outer planets
Given 4.20 x 1022 molecules of He gas, what mass of He do you have?
0.279 g He
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
4.20 × 10²² molecules He
Step 2: Identify Conversions
Avogadro's Number
[PT] Molar Mass of He - 4.00 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 4.20 \cdot 10^{22} \ molecules \ He(\frac{1 \ mol \ He}{6.022 \cdot 10^{23} \ molecules \ He})(\frac{4.00 \ g \ He}{1 \ mol \ He})[/tex]Multiply/Divide: [tex]\displaystyle 0.278997 \ g \ He[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
0.278997 g He ≈ 0.279 g He
I NEED HELP FAST PLEASE
*please answer correctly*
Will mark brainliest thank you!!
Answer:
Explanation:
Using Charles Law ,
[tex]\frac{V1}{T1}=\frac{V2}{T2}[/tex]
Using this formula we have ,
V1= 200cm^3
T1=40+273.15 = 313.15 K
T2 = 100+273.15 = 373.15 k
V2= ?
Hence using above formula simplify it we will get ,
V2 = 238.3 cm^3
Answer:
i dont know that plzzz help me tooooo
Organisms that are made up of prokaryotic cells are NOT ____________.
Question 4 options:
Bacteria
Simpler than organisms made up of Eukaryotic celled organisms
All of these are true about prokaryotic cells
Multicellular
Answer:
Multicellular
they are single celled
pleaseeeeeeeeeeeeeeeeeeeeeeee helppppppppppp
Approximately how many grams of KBr will dissolve in 100g of water at 50C?
60g
70g
80g
90g
Answer:
the answer would be to your problem here is 90g
Explanation:
What is the formula for nickel || dichromate
Answer: Cr2NiO7 is the molecular formula for nickel II dichromate.
If a molecular formula is C8H12O2 , what is the empirical
formula?
a
C4H30
b C4H60
C С2H3o
C2H30
d C8H1202
What is the chemical formula for Tetraphosphorous Pentachloride ?
Answer:
CH4
Explanation:
If you find yourself rushing to complete many different tasks at once, it may be useful to
a Work at home to get each task done as soon as possible
b. Recruit another co-worker to do your normal tasks
C. Clarify the deadlines for each of the tasks with your boss
d. Stop working on the tasks until someone asks about them
Answer:
its c
Explanation:
because i have the most wrinkly brain
If you find yourself rushing to complete many different tasks at once, it may be useful to clarify the deadlines for each of the tasks with your boss.
What do you do when you have many tasks at once?It is common in an office setting to be assigned many tasks to be completed within a short time frame. However, all these tasks must be prioritized in order.
Hence, If you find yourself rushing to complete many different tasks at once, it may be useful to clarify the deadlines for each of the tasks with your boss.
Learn more about work deadlines:https://brainly.com/question/5956140
#SPJ2
Type the correct answer in the box. Spell all words correctly.
What is this process called?
*blank* involves subjecting the evidence and the reference or standard to the same tests. This process determines if two or more
objects share a common origin.
please help i will mark brainlist
Answer:
V= 21 cubic cm (( I am not sure about density ))
Explanation:
V= L×W×H
Which of the following has the smallest atomic radius?
a B
b Al
c F
d N
e Ga
Answer:
c. F
Explanation:
As you go top to bottom down a column of the periodic table, atomic radius increases.
As you go left to right across a period of the periodic table, atomic radius decreases.
Knowing this trend, that means that the smallest atomic radius would be located in the top right of the periodic table. The closest element to that point is fluorine, or answer C.
Brainlist to who gets it right first
Which feature of the leaves is an adaptation for obtaining energy
A. Their short height
B. Their large size
C. Their pointed tips
D. Their unique shape
Answer:
B their larger size . this is right
Answer:
The answer is B. here is proof. Plz mark brainliest.
Explanation:
(blank) are the fastest form of radiation?
Answer: Gamma particles
Answer:
Gamma rays, are the fastest.
Explanation:
They literally move at the speed of light, I hope this helps you.
True or False: There are five (5) of Newton's Laws of Motion *
Answer:
False
there is three
Explanation:
Three laws are combined together which is further known to us as Newton ’s three laws of motion. These three newton’s laws of motion are: Law I – Newton’s first law of motion Law II – Newton’s second law of motion
Hope this helps :)
You write an invisible message on paper with lemon juice - when you heat the paper, the writing turns brown. Chemical or physical change
Answer: Chemical Change.
Explanation: Lemon juice has properties that, when heated, turn the paper brown. In the invisible ink science experiment, that is why it is used. In lemon juice, the acid prevents peeled fruit from browning, like apples and pears. The lemon juice has a bitter taste and is acidic.
If a section of DNA has 15% thymine, how much adenine will it have?
1. 15%
2. 30%
3. 60%
4.85%
Answer:
15% adenine
Explanation:
Thymine and adenine are a nitrogenous base pair so they would equal the same.
______ meters = 177 millimeters
Answer:
117 millimeters = 0.117 meters
Explanation:
This is using unit conversions. There are 1000 millimeters in 1 meter, so you would divide your starting value, 117 millimeters by 1000 millimeters. The units will cancel because they are being divided by themselves and you are left with 0.117 meters.
What advantage does cross pollination have over self-pollination?
1. It allows a plant to have both male and female flowers.
2. It assures that there is genetic variety within each plant species.
3. It ensures that all offspring will be identical.
4. It allows a plant to fertilize itself.
Answer:
It allows all the plants to have one genetic
What is the primary difference between two different isotopes?
Answer:
Because different isotopes have different numbers of neutrons, they do not all weigh the same or have the same mass. Different isotopes of the same element have the same atomic number. They have the same number of protons. The atomic number is decided by the number of protons.
Hope this helps!!!!
Explanation:
Name 5 things that the periodic table includes about 1 atom for each element:
1.
2.
3.
4.
5.
Answer:
They are listed below
Explanation:
The 5 things that the periodic table includes are;
1. Name of the element
2. The symbol of the element
3. Atomic number of the element
4. Relative atomic mass
5. Electron configuration
If a person weighs 125 pounds, 8 oz, how many mg do they weigh?
Answer:
ok so you would just weigh 125 because 16 oz is 1 pound
Explanation: