Answer:
[tex]3x - 12 = 0 \\ 3x = 12 \\ x = 12 \div 3 \\ x = 4 \\ thank \: you[/tex]
Answer:x=4
Explanation:
3x-12+12=0+12
3x=12
3x/3=12/3
x=4
Oxygen has an atomic number of 8. Which of the following could form the nucleus of an atom of oxygen?
6 protons and 8 neutrons.
4 protons and 4 neutrons. 6 protons and 2 neutrons. 8 protons and 10 neutrons.
Answer:
Answer: 8 protons and 8 neutrons
Explanation:
The mass number of oxygen is 16
Atomic number is 8
but proton number = atomic number = 8 protons
[tex]neutrons = mass \: number - atomic \: number \\ [/tex]
neutrons = 16 - 8 = 8 neutrons.
The nucleus of an atom of oxygen typically contains 8 protons and 8 neutrons specifically. So, none of the above options is correct.
What is the formula for calculating the atomic number?The atomic number may be defined as the number of a chemical element in the periodic table through which the elements are arranged in order of increasing the number of protons in the nucleus.
The atomic number of an element = The number of protons in the nucleus of an atom.
Now, according to the question,
If Oxygen has an atomic number of 8, that means the number of protons = 8.
The number of neutrons can be calculated as follows:
Neutrons = mass number - the atomic number.
= 16 - 8 = 8 neutrons.
Therefore, the nucleus of an atom of oxygen typically contains 8 protons and 8 neutrons specifically. So, none of the above options is correct.
To learn more about the Nucleus of oxygen, refer to the link:
https://brainly.com/question/75386
#SPJ2
Please help me, I really need it, God Bless you <3
#1
[tex]\\ \sf\longmapsto {}^{88}_{38}Sr^{2+}[/tex]
As 2 electrons are donated Hence the No of electrons =38-2=36#2
[tex]\\ \sf\longmapsto {}^{51}_{23}V^{3+}[/tex]
As 3 electrons donated the no of electrons=23-3=20#3
[tex]\\ \sf\longmapsto {}^{55}_{26}Fe^{3+}[/tex]
No of neutrons=55-26=29#4
[tex]\\ \sf\longmapsto {}^{112}_{48}[/tex]
As 2 electrons are donated no of electrons =48-2=46#5
[tex]\\ \sf\longmapsto {}^{210}_{82}Pb^{2+}[/tex]
No of neutrons=210-82=128How many elements are in “H2”
Within atoms, what kind of energy
is stored?
lithium oxide+sulphuric acid
Answer:
sulfurous acid with lithium hydroxide to form water and lithium sulfite. The balanced reaction equation is b. H2SO3(aq) + 2 LiOH(aq) → 2 H2O(l) + Li2SO3(aq).
li2so4+h20 (hope it helps )
Your friend's pet hamster weighs 152 grams on Earth. If that hamster traveled to space, what is its weight and why? Answer in complete sentences,
Answer:
force of gravity 1.2 N
Explanation:
dont know for sure but here's what I got
Please help me!! Really important
Answer:
Lanthanum and Lutetium
I hope this will help you
7) Explain how the atomic number of an element identifies the element.
Answer:
The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. ... The sum of the atomic number Z and the number of neutrons N gives the mass number A of an atom.
Answer:
Atoms of each element contain a characteristic number of protons. In fact, the number of protons determines what atom we are looking at (e.g., all atoms with six protons are carbon atoms); the number of protons in an atom is called the atomic number.
Explanation:
mass=35g
density=5 g/cm3
what is the volume?
[tex]\large \mathfrak{Solution : }[/tex]
given values :
mass = 35 g
density = 5 g/cm³
we know that :
[tex] \boxed{density = \dfrac{mass}{volume} }[/tex][tex]5 = \dfrac{35}{vol} [/tex][tex]vol = \dfrac{35}{5} [/tex][tex]volume = 7 \: cm {}^{3} \: or \: 7 \: litres[/tex]After using soap to wash dishes by hand, it is sometimes difficult to keep your hands from remaining slick. Explain why rinsing your hands in lemon juice would make them less slick.
Answer:
Explanation: Rinsing hands in lemon juice would make them less slick because when a acid (soap) and a alkaline (lemon juice) reacts it becomes neutral
Why Farmers kill the silkworm inside the cocoon .
Answer:
It allows the completion of the metamorphosis of the silkworm to its moth stage, whereas most silk harvesting requires the silkworms to be killed in their cocoon stage. No animals suffer or die for the silk to be produced, making it a favorable alternative to normal silk for those who do not believe in harming animals.
8.7351 x 10-3 to ordinary notation:
All work stations and apparatuses must be ____ at the end of the lab experiment or work day.
a. destroyed by fire. b. exchanged for new
c. cleaned
d. disposed of
the process by which charged plasma particles
revert back to a gas
Answer:
Plasma, in physics, an electrically conducting medium in which there are roughly equal numbers of positively and negatively charged particles, produced when the atoms in a gas become ionized. It is sometimes referred to as the fourth state of matter, distinct from the solid, liquid, and gaseous states.
10. Group number tells us the number of
an atom has.Groups and families have__ __ properties
Answer:
similar chemical properties?
Explanation:
Which phrase is an accurate description of the process of erosion
The correct option is C. Erosion is the process by which the earth surface get worn down. It involves the removal of soil, rocks or dissolved material from one location and its transportation to another location.
A ___________
is a process that occurs when
one or more substances are changed into one or more new
substances. For example, when zinc and sulfur are mixed
together with the addition of energy in the form of heat, zinc
sulfide (ZnS) is produced.
Answer:
Reaction??
Explanation:
1. Obtain Information Search for and watch an
online video clip that shows the lotus effect.
What do
you
think causes this phenomenon?
Answer:
up with you and the other day and I don't think I can get a chance
HELLO MAY SOMEONE PLZ HELP ME ON THIS!!!;$7&:
Answer:
Variable data is defined as information and figures used to build control charts. Variable data can be used to create average (X-bar) charts, range charts, and sample standard deviation charts or "S-charts."
Which of the following is not a magnetic material A cobalt B iron C nickel D plastic E steel
Answer:
D. plastic[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]
Scientists test their ideas about things they cannot observe directly by building
Answer:
yes
Explanation:
Testing scientific ideas
Testing Ideas. Testing hypotheses and theories is at the core of the process of science. ... match actual results observation, that lends support.
advantages and disadvantages of chemical
Answer:
Advantages :they are used for seeing chemical reactions .
they are used for doing chemical experiment .
they are used for making affective medicines .
Disadvantages :they harms to our environment.
they can make side effects in our body by affective medicines made by chemicals.
while doing different unknown experiments they make explosions which can also harm to us.
an object is traveleing at a speed of 7.500.0 cm/sec. what is this value in km/day
Answer:
1 cm » 0.00001 km
1 sec » 1/86400 days
[tex]7500 {cm \: sec}^{ - 1} = \frac{75 00\: cm}{1 \: sec} \\ \\ = \frac{7500 \times 0.00001 \: km}{(1 \times \frac{1}{86400}) \: day } \\ \\ = { \boxed{ \boxed{6480 \: km \: {day}^{ - 1} }}}[/tex]
12579 nm rounded to 3 significant figures is
[tex]\\ \sf\longmapsto 12579nm[/tex]
[tex]\\ \sf\longmapsto 12579\times 10^{-9}m[/tex]
[tex]\\ \sf\longmapsto 1257.9\times 10^{-8}m[/tex]
[tex]\\ \sf\longmapsto 12.5\times 10^{-6}m[/tex]
[tex]\\ \sf\longmapsto 12.5\mu m[/tex]
Answer:
1.26e-5
Explanation:
Change 12579 nm to meters first, it becomes 1.2579e-5, then rounding it to 3 significant figures becomes 1.26e-5.
If I have 2.4g of magnesium, how many g of oxygen(O2 ) will I need to react completely with the magnesium? 2Mg +O2 → MgO
Explanation:
just trying....hope that helps
1.6 grams of oxygen will react with 2.4 grams of magnesium.
Explanation:
Given:
2.4 grams of magnesium.
The reaction between magnesium and oxygen:
[tex]2Mg+O_2\rightarrow 2MgO[/tex]
To find:
The mass of oxygen required to react with 2.4 grams of magnesium.
Solution:
The mass of magnesium = 2.4 g
Moles of magnesium =[tex]\frac{2.4 g}{24.305 g/mol}=0.0987 mol[/tex]
[tex]2Mg+O_2\rightarrow 2MgO[/tex]
According to the reaction, 2 moles of magnesium reacts with 1 mole of oxygen, then 0.0987 moles of magnesium will react with:
[tex]=\frac{1}{2}\times 0.0987 mol=0.04935\text{mol }O_2[/tex]
Moles of oxygen required = 0.04935 mol
The mass of 0.04935 moles of oxygen :
[tex]=0.04935\times 31.999 g/mol=1.579 g\approx 1.6 g[/tex]
1.6 grams of oxygen will react with 2.4 grams of magnesium.
Learn more about the unitary method and moles here:
brainly.com/question/2499283?referrer=searchResults
brainly.com/question/20703532
What observations can you make about this group of people? Name one inference you can make from your observations.
Answer:
they are funny and unite.
Thank You
Balance and classify the following equations as synthesis, decomposition, single replacement, double replacement, or combustion: a. C4H10 + 02 -> CO2 + H20 Reaction Type: b. ___ HNO3 + Mg(OH)2 -> Mg(NO3)2 + H20 Reaction Tyne.
2. What do you think may have happened to the "bad" chocolate bar? Do you think
it was made poorly? Or do you think something happened to the chocolate on the
way to the customer? Also, is there a way Charlotte can avoid this issue in the future?
Explain.
Answer:
2
Explanation:
A 2.00 mL sample of a substance A has a density of 18.4 g/mL and a 5.00 mL sample of
substance B has a density of 35.5 g/mL. Do you have an equal mass of substances A and
B? Explain your answer.
Answer: No, the samples are not of equal masses.
Explanation: Mass is volume X density
A: (2ml)*(18.4g/ml) = 36.8 g
B: (5ml(*(35.5g/ml) = 177.5 g
please help me with my question
Answer:
D
Explanation:
17^0 has extra electon
