What did the Curies conclude about radioactivity based on their studies?
A. The amount of radioactivity is an extensive property because it varies as the amount of material varies.
B. The amount of radioactivity is an extensive property because it remains constant as the amount of material varies.
C. The amount of radioactivity is an intensive property because it varies as the amount of material varies.
D. The amount of radioactivity is an intensive property because it remains constant as the amount of material varies.

Answers

Answer 1

Answer:

c

Explanation:


Related Questions

If you put a piece of zinc into a solution of copper (I) sulfate and allow the single replacement reaction to go to completion, how will you know which of the reactants is the limiting reactant? Write the balanced equation, including the states of matter of the reactants and products, to help support your answer.

Answers

Explanation:

Reaction of zinc metal in copper sulfate solution.

[tex]\begin{array}{ll}\text { Oxidation : } & \mathrm{Zn}(s) \rightarrow \mathrm{Zn}^{2+}(a q)+2 e^{-}\\\text {Reduction : } & \mathrm{Cu}^{2+}(a q)+2 e^{-} \rightarrow \mathrm{Cu}(s) \\\hline \text { Full Reaction : } & \mathrm{Zn}(s)+\mathrm{Cu}^{2+}(a q) \rightarrow \mathrm{Zn}^{2+}(a q)+\mathrm{Cu}(s)\end{array}[/tex]

Zinc is listed above copper on the activity series, this means that zinc is more easily oxidized than copper. That is why copper(II) ions can act as an oxidizing agent when put into contact with zinc metal. Ions of any metal that is below zinc, such as lead or silver, would oxidize the zinc in a similar reaction.

help is science, if you don't know the answer just don't put anything /:

Answers

Answer:

Light

Explanation:

Light is a good example of invisible particles. We cannot see light particles aka photon. We only know the light is present by the objects we see. Because we can only see objects when light reflects from them on our eyes.

[I could only think of one example if I can remember one more I'll edit it down]

Oil and water placed in a jar will separate. Even when shaken and mixed, the oil still separates from the water.

Which best describes oil and water?

Oil and water are highly soluble because they have separate chemical properties.
Oil and water have a low solubility because they have separate chemical properties.
Oil and water are highly soluble because they exert different pressures.
Oil and water have a low solubility because they exert different pressures.

Answers

Answer:

Probably B?

Explanation:

I don't have one...

Hope it helps I guess..

Answer: i think is B

Explanation: HATE ME IF IM WRONG

what is dark matter
can we travel faster than speed of light
what is chlorophyll​​

Answers

Answer:

Explaining dark matter and black holes

Here are six big questions about our universe that current physics can’t answer:

What is dark energy, the mysterious energy that appears to be accelerating the expansion of the universe?

What is dark matter, the invisible substance we can only detect by its gravitational effect on stars and galaxies?

What caused inflation, the blindingly fast expansion of the universe immediately after the Big Bang?

For that matter, what caused the Big Bang?

Are there many possible Big Bangs or universes?

Is there a telltale characteristic associated with the death of a universe?

Despite the efforts of some of the world’s brightest brains, the Standard Model of particle physics – our current best theory of how the universe works at a fundamental level – has no solution to these stumpers.

A compelling new theory claims to solve all six in a single sweep. The answer, according to a paper published in European Physical Journal C by Herb Fried from Brown University and Yves Gabellini from INLN-Université de Nice, may be a kind of particle called a tachyon.

Tachyons are hypothetical particles that travel faster than light. According to Einstein’s special theory of relativity – and according to experiment so far – in our ‘real’ world, particles can never travel faster than light. Which is just as well: if they did, our ideas about cause and effect would be thrown out the window, because it would be possible to see an effect manifest before its cause.

Alt

Explanation:

Due to travelling faster than light, dark matter has a higher than usual mass in relation to its resting mass, thus accounting for the large 'missing' mass around galaxies. ... Dark matter is therefore non-baryonic, travelling faster than light and has a mass half that of a photon...

bts army forever.....vzgGgzs0

.......JK

.....justin bieber

The model below shows a part of a human body's muscular system.



Muscles are organs that make movement possible. Which organ system is responsible for controlling muscular movement?


A. Endocrine system


B. Skeletal system


C. Nervous system


D. Digestive system

Answers

Answer:

you must go to jones im doing the same test

Explanation:

Answer C. nervous system

I did the quiz

What is causing the Hot Springs to be so hot? What is causing Hot Springs to be so acidic?

Answers

Answer:

Hot springs are hot because of geothermal heat.  The Hot springs are acidic because hydrogen sulfide and carbon dioxide get in touch with water they evaporate which causes acid.

Explanation:

All matter has both physical and chemical properties.
True or False

Answers

Answer:

F

Explanation:

A. 207 kJ
B. 4730 kJ
C. 9460 kJ
D. 414 kJ

Answers

Answer:

Q = 9460 Kj

Explanation:

Given data:

Mass of copper = 2kg

Latent heat of vaporization = 4730 Kj/Kg

Energy required to vaporize 2kg copper = ?

Solution:

Equation

Q= mLvap

It is given that heat required to vaporize the one kilogram copper is 4730 Kj thus, for 2 kg

by putting values,

Q= 2kg ×  4730 Kj/Kg

Q = 9460 Kj

If a cake recipe requires 25g of sugar, how much sugar will the baked cake contain

Answers

The same amount of sugar which is 25g of sugar.

#1 - What is a pure substance? *
1 point
two or more atoms held together by chemical bonds
the attractive force that holds atoms together
a sample of matter that has specific chemical and physical properties
a pure substance made up of two or more different types of atoms joined by chemical bonds
#2 - TRUE OF FALSE: Water is a pure substance.
1 point
True
False
#3 - What is an atom? *
1 point
the smallest unit of an element that keeps the properties of that element
the attractive force that holds atoms together
a sample of matter that has specific chemical and physical properties
a pure substance made up of two or more different types of atoms joined by chemical bonds
#4 - What is a molecule? *
1 point
two or more atoms held together by chemical bonds
the attractive force that holds atoms together
a sample of matter that has specific chemical and physical properties
a pure substance made up of two or more different types of atoms joined by chemical bonds
#5 - What is a chemical bond? *
1 point
two or more atoms held together by chemical bonds
the attractive force that holds atoms together
a sample of matter that has specific chemical and physical properties
a pure substance made up of two or more different types of atoms joined by chemical bonds
#6 - TRUE OR FALSE: Molecules are all the same size. *
1 point
True
False
#7 - What is a compound? *
1 point
two or more atoms held together by chemical bonds
the attractive force that holds atoms together
a sample of matter that has specific chemical and physical properties
a pure substance made up of two or more different types of atoms joined by chemical bonds
#8 - TRUE OR FALSE: Compounds never form in a fixed ratio. *
1 point
True
False
#9 - TRUE OR FALSE: The structure of matter at the atomic and molecular levels is too small to observe directly. *
1 point
True
False
#10 - TRUE OR FALSE: A complex molecule may contain a few atoms bonded together. A simple molecule may contain thousands of atoms. *
1 point
True
False
#11 - What is a crystal? *
1 point
two or more atoms held together by chemical bonds
a substance in which the particles are arranged in an orderly, geometric, and repeating pattern
a sample of matter that has specific chemical and physical properties
a pure substance made up of two or more different types of atoms joined by chemical bonds
#12 - TRUE OR FALSE: Diamond and graphite are both made of carbon atoms. *
1 point
True
False

Answers

Answer/Explanation:

#1 - A pure substance is either an element or a compound, making it different from a mixture. A sample of matter that has specific chemical and physical properties is the only one that fits here.

#2 - A pure substance is either an element or a compound, making it different from a mixture. Water is a compound, and thus this would be true.

#3 - An atom is the smallest unit of an element that keeps the properties of that element. Just refer to its definition.

#4 - A molecule is two or more atoms held together by chemical bonds . Again, just refer to its definition.

#5 - A chemical bond is the attractive force that holds atoms together . Jus refer to its definition.

#6 - Molecules are most definitely not all the same size, especially given the huge number of them. This would be false.

#7 - A compound is a pure substance made up of two or more different types of atoms joined by chemical bonds . Just refer to its definition.

#8 - Compounds always form in a fixed ratio, so this would be false.

#9 - If by directly, the problem means with the naked eye, this would be true.

#10 - False. It's reversed.

#11 - A crystal is a substance in which the particles are arranged in an orderly, geometric, and repeating pattern . Just refer to its definition.

#12 -True; to be more specific, they are covalent network solids.

pls help me with science​

Answers

The answer is zinc or tin
It is zinc
I did the math

(30 points) Ahhhhhhh can someone help me :'))
I'm not smart and I don't understand how to solve this problem:
Octane, one of the major components of gasoline, burns in air according to this unbalanced equation:
C₈H₁₈ (l) + O₂ (g) ----> CO₂ (g) +H₂O
The formula balanced is: 2 C₈H₁₈ (l) + 50 O₂ (g) ----> 16 CO₂ (g) + 18 H₂O
a) What volume of O₂ at STP is needed to burn 702g (1.00L) of octane?
b) What volume of O₂ at 18°C and 0.975 atm is needed to burn 702g of octane?

Answers

Answer:

a. 137.93 dm3

b. 150.61 L

Answer:

C₈H₁₈

Explanation:

Which sentence is a scientific statement?

A.
There is a substance around us that cannot be detected.
B.
Kids should go to school for 12 years.
C.
Experimentation is the best way to obtain knowledge.
D.
Unicorns once existed on Earth.
E.
There are no living things on the Moon.

Answers

B. Kids should go to school for 12 years.

What is a scientific statement?

Scientific statements are those statements that must be falsifiable which means that able to be proven false while on the other hand, tautology is a statement that is true. The sun revolves around the earth” is an example of scientific statement because this statement can be falsifiable in the light of evidences and researches. Hypothesis is a statement that may be true or false. We can verify it by doing experiments.

So we can conclude that option B is the sentence that represents a scientific statement.

Learn more about scientific here: https://brainly.com/question/17216882

#SPJ1

6.3 moles of water h20

Answers

Answer:

6.3 moles of water = 6.3*18=113.4 grams per mole

Explanation:

Which diagram shows an element?

Answers

I can’t see anything other than a black screen

How many grams of NaCl would be required
to react with 346 mL of 0.607 M AgNO3
solution?

Answers

Answer:

Mass = 12.27 g

Explanation:

Given data:

Mass of NaCl are required = ?

Volume of AgNO₃ = 346 mL (346 mL× 1L/ 1000 mL = 0.346 L)

Molarity of AgNO₃ = 0.607 M

Solution:

Chemical equation:

NaCl  + AgNO₃     →    NaNO₃ + AgCl

Number of moles of AgNO₃:

Molarity = number of moles / volume in L

0.607 M = number of moles / 0.346 L

number of moles =  0.607 M × 0.346 L

number of moles =  0.21 mol

now we will compare the moles of NaCl and AgNO₃.

                       AgNO₃         :          NaCl        

                           1                :            1

                       0.21              :            0.21

Mass of NaCl:

Mass = number of moles × molar mass

Mass = 0.21 mol × 58.44 g/mol

Mass = 12.27 g

Which reverses the flow of current through an electric motor?

A brush
B battery
C armature
D commutator

Answers

Answer:

D

Commutator is the answer

Explanation:

The commutator systematically converts the current direction between the rotor and the outer circuit. As the shaft revolves, the commutator converts the course of current in a winding. For a separate armature winding, when a cylinder has reached one-half perfect turn, the winding is now attached so that current passes through it in the reverse of the original direction.

Answer:

D. Commutator

Explanation:

I just took the quiz. credit to the person above me.

when 3.18 g of copper (||) oxide were carefully heated in a stream of dry hydrogen, 2.54 g of copper and 0.72 g of water were formed determine the number of moles of hydrogen atoms which combine with one mole of oxygen atoms​

Answers

Answer:

the number of moles of atom is 0.91584

QUICK
Which of these is a ball and stick model?

Answers

Figure 3 is a ball and stick model

The number of waves that pass a given point in a certain amount of
time is the waves...

Answers

Answer:

100

Explanation:

nsvcscjkvschssvds

Other Questions
If anyone knows the answer to this can you help me African American reaction to ww2 As you know people are held for years beforethey are executed when given the death penalty.Doyouthink it is cruel and unusual for a personto sit on death row for years before beingexecuted? Do you think it benefit society or thefamily of the individuals wronged to have personto stay alive for so long after such heinous crimeshave been committed? Feel free to agree ordisagree. Explain you view.1-2 paragraphs??? Pls help! a.) 2 is what percent of 1?b.) M is what percent of N?c.) What percent of 88 is 154? PLS HELP! WILL GIVE 100 POINTS 1. What are the first three books of The Old Testament?2.How many sides does a dodecahedron have?3.Banksy is most associated with which city? What has it felt like to consider your own stereotyping views of people A box contains 1 3/4 Pasta how many ounces of pasta are in the box The __________ molecule is known as the universal energy source of the cell. *1 pointCaptionless ImageAMPATPGTPNADH Which system of linear inequalities is represented by thegraph?O y > x-2 and x- 2y < 4O y > + 2 and x + 2y < 4Oy>X-2 and x+ 2y < 4Oy>x-2 and x +2y help is science, if you don't know the answer just don't put anything /: You pay $18.00 for 30 text messages. At the same rate, how much would 12 text messages cost? * 5x + 10 > 15?solve 3.2 geometry worksheet The question is in picture What enlightened ideas about government inspired the American Revolution? Givens: AD is the perpendicular bisector of segment BC AB = 7x+1 AC = 8x-6 BC = 3x + 9 Find: BD Which of the following supported the beliefs of the South? Choose ALL that applyA. low tariffs would help their economyB. states had the right to rule themselvesC. their economy was based on agriculture and therefore they supportedthe use of slave laborD. high tariffs would help their economy Whats the answer please i need help with this one (T_T) 27. The compound having only primary hydrogen atoms is ( ).(A) isobutene(B) 2,3-dimethylbutene(C) cyclohexane(D) propyne