Answer:
element
Explanation:
24 carat gold is an example of element.
What is element?A fundamental object that is difficult to divide into smaller pieces is known as an element. An element is a substance that cannot be broken down by non-nuclear reactions in chemistry and physics.
The atomic number, or quantity of protons in an element's nucleus, is used to categorize each element. Isotopes can be produced depending on the amount of neutrons in the nucleus.
Isotopes will have different physical properties although sharing the same chemical ones. Deuterium contains one proton and one neutron, tritium has one proton and two neutrons, but normal hydrogen has one proton and no neutrons.
Therefore, 24 carat gold is an example of element.
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wich event always involves a chemical change
Answer:
Burning
Explanation:
If i have a 50 L container that holds 45 moles of gas at a temperature of 473 K, what is the pressure inside the container?
Answer:
The pressure inside the container is 34.97 atm
Explanation:
Given:
V=50L R= 0.0821LatmK^-1mol^-1
n= 45mol T= 473k
PV=nRT
P= nRT/V
= 45mol*0.0821Latmmol^-1K^-1*473K/ 50L
=34.95atm
il give brainly and 50 points if u answer my question
Answer: Whats ur Question?
Explanation:
I need help with this on
Answer:
Experiment one, if you are only allowed to choose one answer choose C.
If you allowed to choose 2 answer's Choose A. and C.
Hope this helps! :)
Explanation:
Answer:
C
Explanation:
Reasoning for it being number one because it was repeated multiple times with the same answer while project 2 was repeated once
What is the name of this element?
Answer:
Tungsten
Explanation:
What is an atomic nucleus?
Answer:
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom
______________ have a fixed volume but not a fixed shape.
Answer:
liquids have a fixed volume but not a fixed shape
Hope it helps u
Answer:
[tex] \boxed{ \sf{liquid}}[/tex]
Explanation:
Liquid have a fixed volume but not a fixed shape.
Hope I helped!
Best regards! :D
hierve a la misma temperatura un mililitro o un litro de la misma sustancia
Answer:
Yes
Explanation:
Since it is asking you if it boils at the same temperature, not at the same time, instead if it were for the time the answer would be no, because the more substance, the longer it would take to reach the point.
It is true that a millimetre or a liquid of a substance would require same temperature to boil no matter how much amount of that substance you want to boil.
Thus the answer is YES.
Complete the passage to explain how thermometers work.
Temperature is read by measuring the liquid in the thermometer using the scale on the thermometer. When the temperature rises, the liquid in the thermometer
. When the temperature drops, the liquid in the thermometer
Answer:
Temperature is read by measuring the liquid in the thermometer using the scale on the thermometer. When the temperature rises, the liquid in the thermometer rises. When the temperature drops, the liquid in the thermometer drops.
Explanation:
got it right on edge
When the temperature is increase so the liquid in the temperature should be rised.
When there is a fall in the temperature the liquid in the thermometer should be fallen.
Working of thermometers:
The temperature should be read via calculating the liquid in the theromemeter by applying the scale occur in the thermometer. At the time when the temperature is increase so the liquid in the temperature should be rised. While on the other hand, When there is a fall in the temperature the liquid in the thermometer should be fallen. This means it shows the direct relationship between them
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What is the total number of moles contained in 115g of C2H5OH?
I will mark as Brainliest!
Find the density of a substance with a mass of 5.0 kg and a volume of 43 m3.
Which of the following has 6 neutrons
A. Li - 6
B. O - 16
C. F - 18
D. C - 12
Answer:
F
Explanation:
C-12,6 neutrons, 6 protons and 6 electrons
Chlorine–35 has 17 protons. How many protons and neutrons does the isotope chlorine–36 have? 19 protons and 17 neutrons 17 protons and 18 neutrons 17 protons and 19 neutrons 18 protons and 17 neutrons
Answer:
17 protons
19 neutrons
Explanation:
Chlorine will always have the same amount of protons, and that would be 17 protons.
The atomic mass will change according to how many neutrons are present.
Cl - 35 is comprised of 17 protons and 18 neutrons.
We want to find Cl - 36:
We simply add 1 neutron. 18 + 1 = 19 neutrons.
What are 2 indications that a chemical change has occurred?
Answer: The color has changed or the formation of light and heat. Also, the temprature will change as well.
Explanation:
how does instinstansly seed differ i will name brainlyest
Answer:The difference between seed plants and seedless plants is that seedless plants do not bear seeds for propagation, whereas seed plants bear seeds for multiplication.
Explanation:
Which property would cesium most likely have? It is hard. It is ductile. It is a gas. It has low reactivity.
Answer:
it is ductile
Explanation:
i took the test
Answer:
b
Explanation:
In one second an ant dragged an object 1 mm. What was its speed in cm/min?
Answer:
The speed of the ant is 6 [tex]\frac{cm}{min}[/tex]
Explanation:
Speed is a magnitude that expresses the relationship between the space traveled by an object, the time used for it and its direction. In other words, velocity relates change in position (or displacement) with time by:
[tex]speed=\frac{distance}{time}[/tex]
In this case:
speed= ?distance= 1 mmtime= 1 secondReplacing:
[tex]speed=\frac{1 mm}{1 second}[/tex]
Being 1 mm equivalent to 0.1 cm and 1 seconds equal to 0.01667 minutes then:
[tex]speed=\frac{1 mm}{1 second}=\frac{0.1 cm}{0.01667 min}[/tex]
speed = 6 [tex]\frac{cm}{min}[/tex]
The speed of the ant is 6 [tex]\frac{cm}{min}[/tex]
Which term describes the information that a scientist gathers during an investigation? Data, hypothesis, observation, variable and why HURRY
During the research, the scientists collect the details and observations based on the information called data. Thus, option A is accurate.
What is data?A data is set of facts and observations including textual information, graphs, images, etc. It includes all the measurements and observations collected during the research work. The hypothesis is a thesis statement or a theory.
Observation in research is the gained information and facts during the research process that involves the recording of the data using some sort of tools. While variable is the set that can vary or change.
Therefore, the correct option is A. data.
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Need a little help with chemistry :)
*if you don’t, know don’t answer*
Scientists often _________________________ and _______________________ to help them interpret complex ideas. *
Answer:
no sir
Explanation:
Two bottles are connected with a valve. In bottle A, there are 2.4 L of nitrogen gas at 1.8 atm. In bottle B, there are 4.8 L of nitrogen gas at 1.8 atm.
After opening the valve, what is the pressure of nitrogen gas?
Please answer in atmospheres.
I will give brainliest please answer quickly!
My
Answer:
1.8 atm
Explanation:
For bottle "A"
P1 = 1.8 atm V1 = 2.4L, P2 = ?, V2 = 2.4 + 4.8 L = 7.2 L,
Thus using P1•V1 = P2•V2, we have;
P2 = (1.8 × 2.4)/7.2 = 0.6 atm
For bottle "B"
P1 = 1.8 atm, V1 = 4.8L, P2 = ?, V2 = 7.2L,
P2 = (1.8 × 4.8)/7.2 = 1.2 atm
We will now add the individual pressures of each bottle;
Total pressure = P(A) + P(B)
Total pressure = 0.6 + 1.2
Total pressure = 1.8 atm.
I have the stupid pls help
Answer:
third sentences is correct i think
Answer:
combined number of protons and electrons
What is the momentum of a 0.01 kg toy car moving at 5.0 m/s?
Answer: 0.05 kgm/s
Explanation:
An object at a high temperature has more or less kinetic energy than an object at a low temperature
More or less ?
Which of the following mixtures could be separated using distillation? Select all that
apply.
O A solution of rubbing alcohol and water.
A solution of salt and water.
An alloy of copper and gold.
O A solution of sugar and water.
The solutions which can be separated using distillation are that of alcohol, salt and sugar with water.
What is distillation ?It is defined as a process by which components are separated from a mixture which is liquid by selective boiling and condensation. Dry distillation is a process of heating solids to produce products in gaseous state.
Distillation results in complete separation of components or may be sometimes partial.Due to partial separation,concentration of selected components increases in the mixture. It exploits differences in relative volatility of components of a mixture.
It has many applications like distillation of fermented products which produces distilled beverages , in desalination and in petroleum and oil industry.
It is mainly conversion of liquid into vapor state ,which is subsequently converted back to liquid . It is used to separate volatile liquid from solids and also volatile liquids and non-volatile liquid .
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Which statement best describes a possible way that
societal decisions were impacted by the 1974 research
study?
O CFCs were commonly used in refrigeration
O CFCs were replaced with other products
O CFCs were causing a large hole in the ozone layer.
O CFCs were the focus of a research study.
Answer: (B) CFCs were replaced with other products
Answer:
B
Explanation:
I don't have 1 sorry
Which of the following is NOT a reason why chemical bonds are important? *
a:Bonds are used to make new substances.
b:Building and breaking bonds are part of the energy cycle.
c:Bonds create new elements.
d:Chemical bonds sustain life.
Answer:
the answer would be B :)
The correct answer is; Bonds create new elements
Chemical bonds are formed when two or more atoms are joined together to form a compound.
Chemical compounds are more stable than the respective elements from which they are formed.
Chemical bonds do not create new elements.
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ALOT OF POINTS !! PLEASE HELP DUE SOON!!
Mistakes to avoid using mean:
Mistakes to avoid using median:
SORRY
Question 23 (3 points)
If a piece of aluminum has a density of 2.70 g/mL and its mass is 8.1 g. What is its volume?
Answer:
The answer is 3.0 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question
mass of aluminum = 8.1 g
density = 2.7 g/mL
It's volume is
[tex]volume = \frac{8.1}{2.7} \\ [/tex]
We have the final answer as
3.0 mLHope this helps you
6.72 x 10^12 in standard form
Answer:
6.72*10¹²= 6,720,000,000,000 in standard form.
Explanation:
Scientific notation is a quick way to represent a number using powers of base ten.
The numbers are written as a product:
a * 10ⁿ
where:
a is a real number greater than or equal to 1 and less than 10. n is an integer called an exponent. Represents the number of times the comma is shifted. If the exponent is positive, move the decimal point to the right. And if the exponent is negative, move the decimal point to the left.In this case 12 is a positive number, so the decimal point is shifted to the right 12 places.
So, 6.72*10¹²= 6,720,000,000,000 in standard form.
