Answer:
If the protons in the atom outnumber the electrons, the isotope has more positive charges than negative charges but If the number of electrons exceeds the number of protons, the ion charge will be negative.
Explanation:
The charge of an isotope is defined by how many more protons there are than electrons.
Or the other way around.
For example if there are 4 protons and 2 electrons, the ion charge is +2 because there are more protons.
If there are 4 electrons and 2 protons, the ion charge is -2 because there are more electrons.
A loaf of bread has a mass of 0.5kg and a volume of 2500cm³. what is the density of the bread
Density is mass divided by volume.
Since mas is 0.5kg we need to convert it to grams. Using conversion factors we get the mass of the bread to be 500g.
So densty=500/2500
density =1/5 grams per cubic centimeter
:)
An atom with 17 protons, 18 neutrons, and 18 electrons will have a charge of
Answer:
It's atomic mass is 35
Explanation:
Some chemical reactants are listed in the table below. Complete the table by filling in the oxidation state of the highlighted atom.
Answer:
1. Cu = +2
2. O = – 2
3. C = +2
4. N = 0
Explanation:
Note:
A. The oxidation state of oxygen is always – 2 except in peroxides where it is – 1.
B. The oxidation state of Hydrogen is always +1 except in metallic hydrides where it is – 1.
Now let us solve the question given above.
1. CuO = 0 (ground state)
Cu + O = 0
O = – 2
Cu + (– 2) = 0
Cu – 2 = 0
Collect like terms
Cu = 0 + 2
Cu = +2
2. H2O = 0 (ground state)
2H + O = 0
H = +1
2(1) + O = 0
2 + O = 0
Collect like terms
O = 0 – 2
O = – 2
3. CO = 0 (ground state)
C + O = 0
O = – 2
C + (– 2) = 0
C – 2 = 0
Collect like terms
C = 0 + 2
C = +2
4. N2 = 0 (ground state)
2N = 0
Divide both side by 2
N = 0/2
N = 0
Identify the substance oxidized and the substance reduced in the following chemical equation:zn(s)+AgNO3(aq)=Zn(No3)2+2Ag(a)
Answer:
Explanation:
zn is oxidized because its oxidation number is increased from zero in zn to +2 in zn(No3)2
Ag is reduced because its oxidation number is reduced from +1 in AgNo3 to zero in Ag
oxidation number of zn(s) is zero while the oxidation number of zn in zn(No3)2 is
zn(No3)2=x+(5*2)+(-2*6)=x+10-12=x-2
x-2+2=2
x=2
the oxidation of Ag in AgNo3
AgNo3=x+5+(3*-2)=x+5-6=x-1
x-1+1=1
x=1 while the oxidation number of Ag is zero
so zinc is oxidized and silver (Ag) is reduced
a liquid that occupies the volume of 3.23 L has a mass of 3.188 kg what is the density of this liquid in kilograms to liters
Answer:
0.97 kg/l
Explanation:
i need help with this pls
Answer:
C Is The Correct Answer Because The Deeper The Rock Is The Older It Is So The Top Is The Youngest And The Bottem Is The Oldest
What are some tips *from a girl* to get a girl to like you without making it obvious
Approximately how tall is Able Hill? Don't forget your unit
Answer:
about 42m 3
copied from google
hope that helps
approximately 42m 3 was Able Hill
What are the three types of symbiosis?
Answer:
commensalim, mutualism, parasitism
What’s is the specific gravity of turpentine
1.) What are the chemical properties of matter?
Answer:
Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust. Reactivity is the ability of matter to react chemically with other substances.
Explanation:
Your cute btw :)
which of the following substances does not conduct electricity
a)brass b)copper c)carbone(graphite) d)carbon(diamond)
Answer:
diamonds
Explanation:
Diamond does not conduct electricity.
• A form of carbon in which each of the atom of carbon is joined to four other atoms of carbon, giving rise to a giant covalent composition is a diamond.
• Due to this, diamond is very robust and exhibits high melting point. Thus, is used to cut tools.
• Diamond does not conduct electricity, due to the absence of delocalized electrons in the structure.
Thus, diamond does not conduct electricity. Option d is correct.
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A student is measuring the volumes of nectar produced by a flowering plant for an experiment. He measures nectar from 50 flowers using a graduated cylinder that measures to the nearest millilitre (mL). Which statement describes a change that can help improve the results of his experiment?
A.) His measurements will be more precise if he takes measurements from an additional 100 flowers. B.) His measurements will be more accurate if he uses a graduated cylinder that measures to the nearest tenth of a mL. C.) His measurements will be more precise if he uses a graduated cylinder that measures to the nearest tenth of a mL. D.) His measurements will be more accurate if he takes measurements from an additional 100 flowers.
NEED HELP NOW PLEASE!!!
Answer:
His measurements will be more precise if he uses a graduated cylinder that measures to the nearest tenth of a mL.
Explanation:
His measurements will be more accurate if he uses a graduated cylinder that measures to the nearest tenth of a mL. The correct option is B.
The closeness of a measurement to the real or recognised value is referred to as accuracy.
The learner can achieve more exact measurements and eliminate the possibility of rounding mistakes by using a graduated cylinder that measures to the closest tenth of a millilitre.
This enhanced precision will help to improve measurement accuracy. Taking measurements from more flowers (options A and D) will expand the sample size but will not enhance accuracy unless the measuring device is updated.
Option C recommends improving precision but does not address accuracy.
Thus, the correct option is B.
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What are some ways each person could reduce air pollution and energy consumption? a. adjust the temperature settings - hotter in winter and cooler in summer b. adjust the temperature settings - cooler in winter and hotter in summer c. cut down trees near the house d. replace plumbing fixtures that leak Please select the best answer from the choices provided A B C D
Answer:
b.
adjust the temperature settings - cooler in winter and hotter in summer
Explanation: I took the quiz
Answer:
B. adjust the temperature settings- cooler in winter and hotter in summer
Explanation:
edge 2020
2. Which of the following statements correctly explains the difference between a theory and a scientific law?
O Scientific laws are not as well proven as theories.
O Scientific laws are statements about observed experimental facts, while theories are explanations of natural phenomena.
Theories are not as well proven as scientific laws.
O Scientific laws explain natural phenomena while theories are just guesses.
Answer:
pretty sure its Scientific laws are statements about observed experimental facts, while theories are explanations of natural phenomena.
The statement that correctly explains the difference between a theory and a scientific law is as follows:
Scientific laws are statements about observed experimental facts, while theories are explanations of natural phenomena.Thus, the correct option is B.
What is Scientific theory?A Scientific theory may be defined as a well-explained fact that is significantly associated with the natural world that has been constructed through the utilization of the scientific method, and which brings together many facts and hypotheses.
A Scientific theory is based on observation. It is proven but still testable in nature in order to derive evidence. It generally does not possess mathematical statements and deductions. Theories are explained on nature as well as natural phenomena.
Scientific law is based on unalterable facts or those facts that remain constant. It is proven as well as contains evidence to support the claim. It definitely possesses mathematical statements and deductions.
Therefore, the correct option for this question is B.
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Based on what you know about conductivity and the periodic table, rank the elements in order from most conductive to least conductive.
Answer: chromium, germanium, iodine
Explanation:
Answer:
Chromium, Germanium, Iodine
Explanation:
edge
In the reaction BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaCl (aq), what phases are the reactants in before the reaction?
Question 4 options:
A)
BaCl2 is a liquid, and Na2SO4 is a gas.
B)
BaCl2 is a solid, and Na2SO4 is in aqueous solution.
C)
Both reactants are gases.
D)
Both reactants are in aqueous solution.
Answer:
D. both are stated to be in aqueous solutions by the (aq)
Explanation:
Which type of forest consists of cone-
bearing evergreen trees that often
grow very tall, but provide little
canopy?
A. Coniferous Forest
B. Deciduous Forest
C. Tropical Rainforest
D. Grassland
Answer: A, Coniferous Forest.
What is the mass of a
12.31 cm3 piece of
copper having a density of
8.96 g/cm3
Answer:
110.30 grams
You have to multiply by 8.96.
12.31 x 8.96 = 110.30 grams.
Therefore, that is your answer.
(Sorry I had to answer twice it was because of LukeG1).
How can a substance change from one state of matter to another?
Answer:
heated or cooled
Explanation:
Matter can change from one state to another if heated or cooled.
Answer:
Many things can change a substance from one state to another. These things include pressure, temperature, frequency, and many more.
find the density . mass is 12.52 g and the volume is 20.98 mL
Answer:
0.5968 g/mL
Explanation:
To calculate density:
density
[tex] \frac{mass}{volume} [/tex]
Therefore,12.52g divide by 20.98mL is 0.5968g/mL
What is the density of a purple gas that has a mass of 10 g and a volume of 20 mL? Show your work!
Answer: 0.5g/ml
Explanation:
The density of a substance is given by the following formular; Mass / Volume,
Where mass = 10g
volume = 20ml
Density = 10g/ 20ml = 0.5g/ml
3. A gold ring has a mass of 67.0 grams. When
placed in a graduated cylinder containing 10 ml of
water, the water rises to 13.47 ml. Calculate the
density of the ring.
I
Answer:
The answer is
19.3 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]Density = \frac{mass}{volume} [/tex]
From the question
mass = 67 g
Volume of ring = new volume of water - original volume of water
Volume = 13.47 - 10 = 3.47 mL
Substitute the values into the above formula and solve
That's
[tex]Density = \frac{67}{3.47} \\ = 19.308357[/tex]
We have the final answer as
19.3 g/mLHope this helps you
help please!! will reward brainliest
Answer:
C
Explanation:
just did it and got good luck
i need to know what the summary of matter is helpppppp!!!!
Answer:
Matter can be classified according to physical and chemical properties. Matter is anything that occupies space and has mass. The three states of matter are solid, liquid, and gas. A physical change involves the conversion of a substance from one state of matter to another, without changing its chemical composition.
Explanation:
thomas atoms theroy
Answer:
Do you want to us to explain what it is
Explanation:
Answer:
APEX
Explanation:
The electron
Describe how molecular motion and distance between molecules change as ice is heated to become a liquid and then a gas
Answer:
Described in the explanation section
Explanation:
Ice is the solid phase of water and this phase, the water molecules usually have very little energy and therefore can't detach from each other. This is because the water molecules are closely packed together in a regular arrangement normally called lattice.
Now, when the ice is heated to become a liquid, the energy of the water molecules increases and thus some of them will have enough energy to overcome the intermolecular forces that had been keeping them closely packed in the ice phase. This will then make the water molecules to move further apart thereby forming liquid water.
Now, when the molecules are heated further, the liquid water will now turn into water vapor, which is the gas phase of water. The molecules in this gas phase will have more energy than in the liquid phase because the average distances between each of them will be much larger than the size of the molecules themselves.
What is coronavirus
Why do you need to be cautious
Answer:
IT IS CORONAAAAAAAAAAAAAAAAAAAAA
Answer:
coronavirus is a lung disease, it makes it so that you have a fever, cough, trouble breathing, mild headaches, and sometimes even nausea. you should be cautious because if your at high risk your gonna have trouble recovering from it. wearing a mask could help protect others from the spread of coronavirus. others wearing a mask prevents you from the spread of coronavirus. if you do catch it, make sure you see your doctor and isolate yourself for two weeks to a month and try not to go out as much.
how can an item with a lower mass have a higher weight than an item with a higher mass?
Answer:
probs has to do with the size of the object
Explanation:
WILL MARK BRAINLIEST
8. When the numbers 552. and 38.14 are added the result is:
a) 591
b) 590
c) 5.90 x 10^2
d) 589
Answer:
b) 590
Explanation: