Answers
Answer:
1 = 252g, 2 = 2mL, 3 = 1.5mL, 4 = 3g, 5 = 225g, 6 = 0.92g/mL, 7 = 0.75g/mL, 8 = 0.71g/mL, 9 = 1.9mL, 10= 1.11mL, 11 = 76.9g
Explanation:
This problem is testing how well you can move around the equation D = m/v where D = Density (g/mL), m= mass of sample (g), v = volume of sample (mL).
Related Questions
So I had a question which was, What is the charge on a neutron?
A. neutral
Bon positive
C. negative
(Which one of those is right choice?)
Answers
Answer:
A. neutral
Explanation:
It's net charge is 0.
Hope it is helpful....Answer:
A. neutral
Explanation:
A neutron is given by formular
[tex]» \: \: {}^{1}_{0}n[/tex]
hence it's net charge is zero
In a nuclear reaction 5.02 ×10^-28 kg of a radioactive sample reduced to 4.02×10^-29 Kg producing 259.74 Mer energy. Calculate the speed emitted. [ mer= 1.6×10^-13].
I need urgent answer with method pls
Answers
Answer:
2jd
Explanation:
Heueneirnfjgnjfbgjgfj,fqiywyjeukdhsjdshmsjhskdlhkddvndkurmbsjhsmjdjgsjlsmhudksyke
Which of these choices describes a solid substance?
A. The volume of the substance depends on the container its in.
B. Volume of the substance changes depending on its location.
C. The shape of the substance changes often.
D. The shape of the substance is fixed and volume is constant.
Answers
liquids take the shape of the container
Solids are always fixed with a constant volume
Gases move around somewhat like a liquid
The more energy a particle has, the
more it will move. Which statement is
true about the energy level of liquids?
A. Liquids have less energy than solids.
B. Liquids have more energy than solids.
C. Liquids have more energy than gases and plasma.
D. Liquids have no energy.
Answers
Option B is the answer.
Hope it helps you
Hi,
Answer:
B. Liquids have more energy than solids.
THIS IS URGENT meant to be due today can someone help out please I’ll brainlist :)!
Answers
Hi,
These are the answers
•Question 6. B, Yogurt and sour milk
•Question 7. B, turn litmus paper red
•Question 8. B, used to find pH of a solution
•Question 9. A, names of products and reactants of a chemical reaction in words
•Question 10. B, feel slippery
Hope it help you. Pls mark brainliest if it helped you
From
its position in the periodic table, determine which atom in each pair is more electronegative:
a. Br or Cl
b. N or O
c. S or O
d. P or S
e. Si or N
f. Ba or P
g. N or K
Answers
Answer:
a.cl
b.O
c.O
d.S
e.N
f.p
g.N
A(n)_________ test only one factor at a time
Answers
Answer:
controlled experiment
what is the concentration of hydrogen ion, H+, present in a water sample if 100. ml of the sample requires 7.2 ml of 2.5 x 10 -3 M NaOH to be neutralized
Answers
Answer: 1.8x10^-4 M H+
Explanation: The number of moles of NaOH added to the 100 ml soultion will be equal to the number of moles of H+ present in that solution.
Moles NaOH in 7.2 ml of 2.5x10^-3 M NaOH
(2.5x10^-3 M NaOH) is the same as 2.5x10^-3 moles NaOH/liter
(2.5x10^-3 moles NaOH/liter)*(7.2 ml)*(1 liter/1000ml) = 1.8x10^-4 moles NaOH used to titrate 100 ml of the acid. That means there was 1.8x10^-4 moles of H^+ in 100 ml.
Concentration of H^+ = (1.8x10^-4 moles H)/0.100 l) = 1.8x10^-4 M H+
(pH of 3.74)
Can someone plz help me? Plzz giving brainliest!
(Plz chose 3 questions)
Answers
Answer:
Facts: A D and maybe C I think you are intended to say C
Explanation:
A is certainly not an opinion. It is either true, or it is not. I think it is intended as a fact.
B is an opinion (which I think is true)
C is kind of iffy. It might be true and it might be an opinion. In looking it up, it is factually incorrect. Cats are related to wildcats in the middle east.
D is also iffy. They can just eat disease free rodents. I'd classify it as more opinion than fact.
E. definitely an opinion.
he difference between a stable isotope and an unstable isotope of an element is that __________. ANSWER the unstable isotope decays and is always transformed into a stable form of the same element the stable isotope has a nucleus that decays spontaneously and is radioactive the unstable isotope has a nucleus that does not decay spontaneously and is never radioactive the stable isotope has a nucleus that decays spontaneously but is not radioactive the unstable isotope has a nucleus that decays spontaneously, is radioactive, and can be transformed into an atom of another elemen
Answers
We know that any known element is defined by the number of protons in its nucleus (which is the same as the number of orbiting electrons).
We can define isotopes as the atoms of the same element but that have a different number of neutrons in the nucleus. The correct statement of the difference between stable isotopes and unstable isotopes is:
"The difference between a stable isotope and an unstable isotope of an element is that the unstable isotope has a nucleus that decays spontaneously, is radioactive, and can be transformed into an atom of another element"
Particularly we can define two of these, the stable isotopes, that can remain as they are for a lot of time, and the unstable isotopes, that have more neutrons in its nucleus than a stable isotope, and because having those extra neutrons in the nucleus needs energy, eventually the isotope will experience a spontaneous radioactive decay, which "breaks" the nucleus in different ways, and, in some cases, generates different elements in the process.
Then we can conclude that:
"The difference between a stable isotope and an unstable isotope of an element is that the unstable isotope has a nucleus that decays spontaneously, is radioactive, and can be transformed into an atom of another element"
If you want to learn more, you can read:
https://brainly.com/question/22888381
Element Z has 2 natural isotopes. One isotope has a mass of 15.0 amu and a relative abundance of 30%. The other isotope has a mass of 16.0 amu. What is the second isotope's relative abundance?
Answers
Answer:
70%
Explanation:
Just substract 100 % - 30%
is it correct what I have done
Answers
Anss\zyew:yes,the answer is very normal and well done
4. What is a scientific law, and how does it
differ from a theory?
Answers
SURELY SOMEONE HELP it’s urgent plllss I’ll brainlist u/5 star!!! answer the ones u know. :)
Answers
Answer:
3 exothermic reaction. only that much
Hi,
These are the answers.
• Question 2. C , Substance dissolves
• Question 3. D , Exothermic reaction
• Question 4. C , Endothermic reaction takes place
• Question 5. A , the products formed has more energy than reactants
Hope it helps you... pls mark brainliest if it helped you
Could someone plz help me
Answers
Answer:
A
Explanation:
B: not B. Opinions don't matter. Facts do.
C: its a consideration. It will limit the scope of the experiment. But it's not relevant to the investigation. Not C
D: You might want to contact some scientists to see what they think about your investigation, but randomly interviewing anyone and everyone is not the answer.
You want to do A for certain.
Why will goats protect wildfires
Answers
Explanation:
The goats can stretch their necks up to 7 feet, biting branches and low lying leaves. They eat poison oak and can clear rocky cliffs -- something other livestock can't do. And it's easier to control where the goats cut a fire break, unlike controlled burns -- another method of removing wildfire fuel.
pls mark me branilestWhich is true about atoms?
A. They are always made from other compounds.
B. They are always motionless.
C. They can combine to form other substances.
D. They cannot combine to form other
simbstances.
Answers
Answer:
They are always motion less
Explanation:
I hope that is an ok answer for you:)
Let me know if I can help you in any other ways
State the period and group to which aluminum belongs to in the periodic table
Answers
Explanation:
aluminium belongs to group 13 and period 3
Which of the following is NOT. A property of salt in the ionic and covalent properties lab?
Answers
Answer:
im thinking Low melting point
because NaCl (salt has mp 801 degC)
and pretty sure water has mp 0 degC
Explanation:
conversions please help me with 6 & 7
Answers
6.
7. 6 × 7 = 42
42 ÷ 10 = 4,2 Pizzas
You need to buy 4 or 5 Pizzas.
19 yards is the same as how many meters?
Answers
What accurately describes the reactants of a reaction
Answers
Answer:
Substance that are used in the reaction
Explanation:
I hope this will help you
Answer:
Substances that are used in the reaction. Hope my answer helps you!
An excess of a divalent metal M was dissolved in a limited volume of hydrocloric acid. If 576cm³ of hydrogen was librated at s.t.p , what was the mass of metal that produced this volume of gydrogen?( M = 24, H = 1 , molar volume of gas at s.t.p = 22.4dm³)
Answers
Answer:
14.8 g
Explanation:
step 1 You first have to convert the cm^3 to dm^3 by dividing the volume by 1000 then find the number of mols for Hydrogen gas
from there you can use the of moles for hydrogen to find the moles of the metal step 2
then step 3 you multiply the number of by The Mr or Fr giving you your mass
What is required for electrons to move from the stable energy level to an excited state?
Answers
answer
When an electron temporarily occupies an energy state greater than its ground state, it is in an excited state. An electron can become excited if it is given extra energy, such as if it absorbs a photon, or packet of light, or collides with a nearby atom or particle
Which describes a relationship when calculating the energy of a photon? The energy of the photon is directly proportional to frequency. The energy of the photon is inversely proportional to frequency. As the energy of the photon increases, Planck’s constant increases. As the energy of the photon increases, Planck’s constant decreases.
Answers
Answer:
The photon is directly proportional to frquency
Explanation:
E=hf
where E is energy
h is plancks constant and
f is frequency
Answer:
A
Explanation:
Edge 2022
Cats are aliens send to spy on us. Is the statement printed on this poster about cats scientific theory? Explain your answerr, including whether you can provide evidence to support the statement
Answers
Answer:
No, there is no evidence or proof that proves the scientific theory. Therefore, the statement is not a scientific theory.
1. Why Isn't Hess's law helpful for calculating the heat of reaction Involved in the conversion of diamond to graphite?
Answers
Answer:
This law is not applicable or not helpful in the conversion of diamond to graphite because both are just allotropes of carbon along with C60 (Buckminsterfullerene or buckyball), C540, C70, amorphous carbon, and carbon nanotube
Explanation: did that help? hope it did!
What is the ability to do work
Answers
Answer:
The ability to do work is called energy.
How to convert 2.37 l tp dl?
Answers
Answer:
23.7
Explanation:
The formula to convert from L to dL is:
dL = L x 10
What is the approximate mass of one electron?
Answers
Answer:
9.1093837015 × 10^−31 kg
Very small mass