Answer:
positive charge comes from having more protons than electrons; negative charge comes from having more electrons than protons charge is quantized, meaning that charge comes in integer multiples of the elementary charge e
Explanation:
PLZ GIVE ME ANSWERS WITH WORK I WILL GIvE YOU A BRain LIST PLZZZZZ
49. Carbon-14 has a half-life of 5,730 years. If a sample contained 80 mg originally, how much
is left after 17,190 years?
50. The half-life of cobalt-60 is 5.26 years. If 100 grams are left after 15.78 years, how many
grams were in the original sample?
Answer:
i only found the 49, hope it still helps, mate
49. In this question (t½) of C-14 is 5730 years, which means that after 5730 years half of the sample would have decayed and half would be left as it is.
After 5730 years ( first half life) 70 /2 = 35 mg decays and 35 g remains left.
After another 5730 years ( two half lives or 11460 years) 35 /2 = 17.5mg decays and 17.5 g remains left .
After another 5730 years ( three half lives or 17190 years) 17.5 /2 = 8.75mg decays and 8.75g remains left.
after three half lives or 17190 years, 8.75 g of C-14 will be left.
BRAINLIEST ANSWER!!!Nitrogen has three occurring Isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope
is the most abundant?
Please also explain why:D
Answer:
N-14 is more abundant in nature because it is closest to the average atomic mass of 14.007. The average atomic mass is a weighted average which takes into account not only the mass but the abundance of a particular isotope.
Explanation:
hope this helped:)
blance: Mg + HNO2 → Mg(NO2)2 + H2
Explanation:
Mg + 2HNO2 → Mg(NO2)2 + H2
Answer:
Mg + 2HNO2 → Mg(NO2)2 + H2
Explanation:
Each family in the periodic table has its own characteristic properties based upon its number of valence electrons.
True or False
The charge of the atom is _______ because there are ______ numbers of and______ in an atom.
Answer:
see below
Explanation:
the charge of the atom is neutral because there are equal numbers of protons and electrons in an atom.
hope this helps
please mark
what element has the same number of valence electrons as argon
Answer: There are two elements actually and those elements are Carbon and Silicon
Explanation:Plz mark brainliest if im right
There are 0.5 moles of carbon, 1 mole of hydrogen, and 0.25 mol of
oxygen. What is the empirical formula of this compound?
Answer:
C₂H₄O
Explanation:
The empirical formula of a compound is defined as the simplest whole number ratio of the atoms present in a molecule. As we have in the molecule Carbon, Hydrogen and Oxygen to find the simplest ratio we need to divide each number of moles in the moles of Oxygen (The lower number). As follows:
C = 0.5mol C / 0.25mol O = 2
H = 1 mol H / 0.25mol O = 4
O = 0.25mol O / 0.25mol O = 1
The empirical formula is:
C₂H₄O1) how can you make a solution more concentrated
Explanation:
solvent bc when you remove it it becomes more concentrate
LINKING IN
TECHNICAL OBJECTS
1 a) What is linking?
Answer:
A link is a fastening unit that attaches two parts of an object together
Different types of links have different characteristics
Answer:
Linking is the process of combining all the component object files. The linker determines where the code will reside in memory and how control will transfer between the components.
What is unique about the metal mercury?
Which substance contains positive ions immersed in a sea of mobile electrons?
a. O2 (s)
b. CuO (s)
c. Ag (s)
d. SiO2 (s)
The substance, silver (Ag), we can see positive ions immersed in a sea of mobile electrons.
What is metallic bond?The term metallic bond refers to the bonding between metal atoms. This bonding consists of positively charged ions and a sea of electrons bonded together electrostatically.
Hence, in the substance, silver (Ag), we can see positive ions immersed in a sea of mobile electrons.
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The photograph shows a way individuals work together in groups.
Which term best describes the kind of work shown in the photograph?
Answer: Postindustrial
Explanation:
I just took the test hope this helps: )
Answer: A: Postindustrial
Explanation:
What is the density of a 32g toy car that
has a volume of 8cm3?
A. 256alcm3
An3
Answer:
density=mass/volume
density=32/8
density=4
Are two clear liquids mix to create a “chunky” solid a chemical of physical change? Why?
Answer:
Well i know that a chemical change is somthing that can not be undone.
This however is a physical change let me explain.
Even though you mixed two chemicals together to create a new substance does NOT mean it is a chemical change. This however is kinda like a water. You can turn water into a ice cube that does not mean it changed what the water is made out of it just changed the form of the water. Kinda like this. A chemical change would be an example of buring a log once that log has turned into ashs it will never be the log it was before.
Explanation:
A car accelerates from 10 km/h to 80 km/h in 8.0 seconds. Determine the car’s acceleration in m/s2.
Answer:
The difference in velocity divided by rate = acceleration.
80 - 10 = 70km/h
60 sec. per hour, so 70 × 60 = 4,200 km/s
4.200/8=525
520/60 = 8.6666666667 km/h
Explanation:
Not the answer but hope it puts you in the neighborhood.
The resultant acceleration of the car is 2.43 m/s².
What is acceleration?Acceleration is define as the rate of change of velocity with respect to the time and it will be calculated as:
Acceleration = Velocity / Time
Given that, velocity of car = 80km/h - 10km/h = 70km/h
As we know that 1 km = 1000m
and 1 hour = 3600 sec
So that 70km/h = 19.4 m/s
Given time = 8 sec
Now putting values on the acceleration equation, we get
Acceleration = 19.4 m/sec / 8sec = 2.43 m/s²
Hence required acceleration is 2.43 m/s².
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Show how the limiting reactant is determined for 3.80 g of magnesium reacting with 12.5 g of oxygen.
Answer:
Magnesium is the limiting reactant.
Explanation:
The balanced reaction is:
2 Mg + O₂ ⇒ 2 MgO
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following quantities participate in the reaction:
Mg: 2 molesO₂: 1 moleMgO: 2 molesBeing the molar mass:
Mg: 24.31 g/moleO₂: 32 g/moleMgO: 40.31 g/moleThen the following quantities of mass participate in the reaction:
Mg: 2 moles* 24.31 g/mole= 48.62 gO₂: 1 mole* 32 g/mole= 32 gMgO: 2 moles* 40.31 g/mole= 80.62 gThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
To determine the limiting reagent, it is possible to use the reaction stoichiometry of the reaction. You can use a simple rule of three as follows: If by stoichiometry of the reaction 32 grams of oxygen react with 48.62 grams of magnesium, 12.5 g of oxygen will act with how much mass of magnesium?
[tex]mass of magnesium=\frac{12.5 g of oxygen*48.62 grams of magnesium}{32 grams of oxygen}[/tex]
mass of magnesium= 18.99 grams
But 18.99 grams of magnesium are not available, 3.80 molesgrams are available. Since you have less mass than you need to react with 12.5 grams of oxygen, magnesium will be the limiting reagent.
What is an analyte in chemistry?
Answer:
A substance being analyzed by (for example) mass spectrometry, infrared spectroscopy, NMR spectroscopy, or chromatography. In NMR spectroscopy, the analyte is often a solution in a deuterated solvent such deuterochloroform
Explanation:
Answer An analyte', component (in clinical chemistry), or chemical species is a substance or chemical constituent that is of interest in an analytical procedure. The purest substances are referred to as analytes. Example : 24 karat gold, NaCl, water, etc.
: A substance being analyzed by (for example) mass spectrometry, infrared spectroscopy, NMR spectroscopy, or chromatography. In NMR spectroscopy, the analyte is often a solution in a deuterated solvent such deuterochloroform (CDCl3; chloroform-D) or deuterated water (heavy water; D2O). hope this helps have a bless night❤️❤️❤️
Explanation:
Which of the three phases of matter solid liquid or gas has particles that are fast moving and independent of each other??? Also this is science class work
The Answer is Solid
Explanation:
the particles in a solid are vibrating very fast and are packed together so they're independent one each other.
How does climate change
relate to energy?
how many miles will a person run an 800 km race?
Answer:
uhh its 497 miles
Explanation:
How many elements are in H2O
Answer: bale 2 elements sya ang mga yon ay hydrogen at oxygen.
H2O is a molecule made of H for hydrogen and O for oxygen. There are 12 of these molecules. The smaller number is the number of atoms of the element to the left of it.
MARK ME AS A BRAINLIEST PLEASE
H₂O, which represents a molecule of water, consists of three atoms: two hydrogen atoms (H) and one oxygen atom (O). Therefore, H₂O contains a total of three elements: hydrogen and oxygen.
What is H₂O?H₂O represents a molecule of water. The "H" stands for hydrogen, and the "O" stands for oxygen.
Hydrogen (H) is a chemical element with the atomic number 1. It is the lightest and most abundant element in the universe. Hydrogen atoms consist of a single proton in the nucleus and one electron in orbit around the nucleus.
Oxygen (O) is a chemical element with the atomic number 8. It is a highly reactive and abundant element, making up a significant portion of the Earth's atmosphere and the compounds found on Earth. Oxygen atoms consist of eight protons in the nucleus and eight electrons in orbit around the nucleus.
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Intermolecular forces and Kinetic energy together help determine whether a substance will
be a solid, liquid, or a gas
True or false
Answer:
true
Explanation:
A mixture of metals with properties different than the metals by themselves is called a(n) __________.
Answer:
Alloy
Explanation:
Which of the following is an example of mutualism?
Answer:The relationship which is between bacteria and ungulates with the intestine is or good example of mutualism. Mutualism plays an important role in ecology. We can say that if we measure the exact fitness what we get as a benefit is a mutualistic relationship.example of a mutualistic relationship is that of the oxpecker (a kind of bird) and the rhinoceros or zebra. Oxpeckers land on rhinos or zebras and eat ticks and other parasites that live on their skin. The oxpeckers get food and the beasts get pest control.
Explanation:
hope this helps have a nice night❤️❤️❤️❤️
Explanation:
a human uses dog to protect a flock of sheep
how does a drupe fruit differ from a hesperidum fruit.
Answer:
hi
Explanation:
Answer:
Fleshy Fruits: All of most of the ovary wall (pericarp) is soft or fleshy at maturity. ... partitions, juicy seed vesicles, and a leathery exocarp similar to a hesperidium. ... This is a very common dry fruit found in many different plant families.
Explanation:
how many mililiters is 0.55 L
Answer:
It's 550 milliliters.
Explanation:
I hope this helps.
How is space like a vacuum?
A car accelerates from 20 m/s to 40 m/s in 4 seconds. What is the car’s acceleration?
Answer:
40 - 20 = 20
20/4 = 5m/s
The difference in velocity divided by the rate = acceleration.
Which of the following dilutions would produce 2.0M acid from 3.0M acid
A) 3.0mL acid and 2.0mL water
B) 2.0mL acid and 1.0mL water
C) 2.0mL acid and 3.0mL water
D) 1.0mL acid and 2.0mL water
Answer:
that's a little bit difficult question
Explanation:
sorry !
WILL GIVE BRAINLIEST AND 20 POINTS How many grams are in 2.36 L of neon gas
Answer:
2.088464 grams.
Explanation:
The density of neon is 0.9002 g/L. Multiplying this value by the number of liters gives how many grams of neon it contains.
0.9002(2.32) = 2.088464