Answer:
True
Explanation:
Heat is the transfer of thermal energy from a system to its surroundings or from one object to another. This transfer of energy is from the object at a higher temperature to the object at a lower temperature.
A student sets up the following equation to convert a measurement. (The stands for a number the student is going to calculate.) Fill in the missing part of this equation. Note: your answer should be in the form of one or more fractions multiplied together.
Answer:
0.090 J/(mmol·°C) × (1000 mmol/mole × 1 kJ/(1000 J)) = 0.090 kJ/mole
Explanation:
The unit of conversion from kilo-Joules to Joules is given as follows;
1000 Joules = 1 kilo-Joule
The unit of conversion from milimoles to moles is given as follows;
1000 milimoles = 1 Mole
Therefore, we have
The value of the given expression is 0.090 J/(mmol·°C) × 1000 mmol/mole × 1 kJ/(1000 J) = 0.090 kJ/mole
0.090 J/milimole = 0.09 kJ/mole.
When salt dissolves in water what type of substance is formed
Answer:
homogeneous solution
Explanation:
Hoped that helped :)
Answer:
A mixture
Explanation:
When salt dissolves in water mixture is formed.
It can be separated by evaporating then condensing the water.
Both substances retain their old property.
Hope this helps
plzzzzzzzzzzzzzzzzzzzzzzzz help
Gases, bc its expand the most upon heating because the intermolecular space is more than in solids or liquids.
intermolecular space = the space between each particles
Gases
the intermolecular space between gases is more than in solids and liquid
Which of the following is a homogeneous mixture?
a
Mixed cake batter
b
Sand in water
c
Sodium chloride
d
Sulfur
— are proteins. a)Skin b)Hydrates c)Skin d)Hides
Answer:
skin
Explanation:
I think its skin because there is a protein that mostly makes up our skin, called keratin.
Match the following words.
1. A substrate binds to an enzyme at the _______ where the reaction occurs.
2. In a catalyzed reaction, a reactant is often called a __________
3 ________is a measure of how fast an enzyme can convert the reagent to the product.
4. An inorganic substance necessary for the function of some enzymes is called a___________
5. When properly aligned, the enzyme and substrate form an enzyme-substrate (ES) __________
6. A small organic molecule necessary for the function of some enzymes is called a ___________
a. activity
b. cofactor
c. active site
d. substrate
e. complex
f. coenzyme
Answer:
1. active site
2. substrate.
3. activity
4. cofactor
5. complex
6. coenzyme.
Explanation:
1. A substrate binds to an enzyme at the active site where the reaction occurs.
2. In a catalyzed reaction, a reactant is often called a substrate.
3 activity is a measure of how fast an enzyme can convert the reagent to the product.
4. An inorganic substance necessary for the function of some enzymes is called a cofactor.
5. When properly aligned, the enzyme and substrate form an enzyme-substrate (ES) complex.
6. A small organic molecule necessary for the function of some enzymes is called a coenzyme.
An atom of which element is represented by the model of a neutral atom? A Carbon (C) B Oxygen (O) C Sulfur (S) D Nitrogen (N) 6. Which of the following describes a proton? I. Has mass II. Has no mass III. Has a positive charge IV. Found in the cloud V. Has a neutral charge A II, IV and V B I, III, IV C II and IV D I and III
Answer:
A. Carbon
B. I, III
Explanation:
Carbon has four valence eletrons meaning that it is more stable than the other choices. A proton has mass and has a positive charge.
An organic chemist measures the temperature T of a solution in a reaction flask. Here is the result. T=35.649C. Convert T to SI units. Round your answer to 3 decimal places.
Answer: 308.649 K
Explanation:
Temperature in Celsius would be converted to Kelvin (K), which is the widely accepted S.I units for measuring Temperature in Chemistry.
Kelvin (K) = 273 + Celcius
= 273 + 35.649 C
= 308.649 K
Mercury is a liquid metal having a density of 13.6 g/ml. What is the volume of 5.00g of mercury metal
Answer:
The volume of mercury is 0.368mL .
Explanation:
You have to apply Density formula, D = mass/volume. Then, substitute the following values into the formula :
[tex]density = \frac{mass}{volume} [/tex]
[tex]let \: density = 13.6 , mass = 5[/tex]
[tex]13.6 = \frac{5}{vol} [/tex]
[tex]13.6 \times vol = 5[/tex]
[tex]vol = 5 \div 13.6[/tex]
[tex]vol = 0.368ml \: (3sf)[/tex]
Volume of mercury metal of mass 5.00 g and density 13.6 g/ml will be
68 ml.
What is density ?Density of metal can be calculated by mass per unit volume. Density of a substance is directly proportional to mass and inversely proportional with volume.
Density= mass/ volume.
Volume= density * Mass
= 13.6g/ml * 5 g
= 68 ml.
Density of substance is directly proportional with mass and and inversely proportional with volume. If mass of the substance increases density increases, if volume of the substance decreases then density increase.
Therefore, Volume of mercury metal of mass 5.00 g and density 13.6 g/ml will be 68 ml.
To learn more about volume, refer to the link:
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I need help with atomic numbers can you please teach me and tell me the answer you will get 10 points
Answer:
[tex]\frac{6}{3} Li^{-}[/tex]
Explanation:
The number of protons and neutrons together create total atomic mass.
The number of protons determine what element it is on the Periodic Table.
The number of electrons v protons determine the charge of the atom.
Protons are positive, electrons are negative, neutrons have no charge.
Since there is 1 more electron than protons, the overall charge is going to be -1.
We are given that there are 3 protons, so that gives us the Lithium element with a -1 charge.
Add up the 3 protons with the 3 neutrons and we get 6 as the total atomic mass in this atom.
How do you write 561983 in scientific notation?
Answer:
5.61983 × 10^5
Explanation:
Move the decimal forward 5 spaces, each time doing so you add 10^(# of spaces moved, in this case 5)
When you crush a glow stick and shake it, the two liquids mix and the stick glows. Which statement is true?
Answer:it B,
Explanation: you make two liquids react together. Energy is being given off because light is emitted. The electrons of the liquids must be losing energy in order to produce light.
If a question is testable and can provide an answer based on empirical observations and reasonable logic, it can be answered with science.
Answer:
True
Explanation:
Someone plz help I Don’t know I would do something like this and I really need to get it done
3.6x = 0.6x + 13 I really need help
Answer: x=13/3
Explanation:
step 1: multiply both sides by 10: 36x=6x+130
step 2: subtract 6x from both sides 30x=130
step 3: divide both sides by 30: x=13/3
A substance has a volume of 20 mL and a density of 2.5 g/mL. What is its mass?
Answer:
mass = 50 gExplanation:
Density of a substance can be found by using the formula
[tex]Density(\rho) = \frac{mass}{volume} [/tex]
From the question
Density = 2.5 g/mL
volume = 20 mL
To find the mass substitute the values into the above formula and solve for the mass
That's
Making mass the subject we have
mass = Density × volume
mass = 2.5 × 20
We have the final answer as
mass = 50 gHope this helps you
Answer:
mass=?,volume=20,density=2.5.
density=mass/volume.
which will be 2.5=mass/20
which is mass=2.5×20=50kg
Some people argue that a policy of putting out wildfires is having a negative long-term effect on the number and strength of wildfires. Suggest why this could be the case.
Answer:
The answer to this is simple.
There is a school of thought that believes that natural fires are necessary.
Explanation
They are required to reduce the density of the forests that are so thick that when they eventually burn, the effects are usually catastrophic. According to one source, some of these forests are over a hundred years old. When eventually these kinds of forests catch fire, they become very hard to manage and the destruction the leave are usually worse off than if they had not been allowed to so heavy and impenetrable.
Another reason put forward by this school of thought is that the countries who own these forests have politicised wildfires using them as an excuse to attract international funding/assistance because the fires are depleting the worlds protective greenery/earth biggest natural oxygen factory.
Cheers!
Please help and if you can please explain how you got that answer
Answer: C
Explanation: A good hypothesis is an “If...then,” statement and you are looking for which tomato plant grows the best. Vitamin A is the independent variable and the height is the dependent variable.
PLZ HELP!! ILL MARK BRAINLIEST!!! Which would be the most reliable source for information? the Center for Disease Control website Wikipedia, an online publicly edited encyclopedia updates from a Twitter account an editorial on a new drug
Answer:
Center for Disease Control (CDC)
Explanation:
All of the other answers can be changed and may not be backed with actual scientific evidence.
Answer:
CDC
Explanation:
What is the Scientific notation for 8,950,000
what should I choose?
Answer:
the volume of water with egg was 200 and when we removed the egg become 125
Explanation:
200ml - 125ml = 75ml
so 1 millimeter = 1 centimeter cubic
so
75ml = 75 cm3
the answer is 75cm3
why do waves refract in shallow water?
Answer:
Refraction of waves involves a change in the direction of waves as they pass from one medium to another,so as water waves are transmitted from deep water into shallow water,the speed decreases,the wavelength decreases and the direction changes
9 x 1025 m
How many significant figures are in
this measurement?
Answer: 9000 - 1 significant figure
Explanation: Since you are multiplying, the number with the least amount of significant figures determines the number of significant figures in the answer. The number 9 has 1 significant figure and 1025 and has 4 significant figures so 9 has the fewest significant figures, meaning your answer will be 1 significant figure.
Will mark you brainliest!
Answer:
D) lithium
Sodium Chloride is salt which is oviously present.
Oxygen is also present because fish use their gills to get oxygen from water.
Plants are present under ocean which release Carbon dioxide.
three examples of monosaccharides
Answer:
three example of glocose, fructose, galactose.
What three families are found in the center portion of the periodic table
Three families are found in the center portion of the periodic table are of iron, cobalt and nickel atoms.
What are groups in periodic table?Groups are the vertical columns of elements present in the periodic table in which elements of same valency and valence configuration is present.
In the periodic table total 18 groups are present starting from left side to right side. In the middle of the periodic table three families or groups of iron, cobalt and nickel atoms are present which are known by the name of group 8th, 9th and 10th of the periodic table.
So, three families are of iron, cobalt and nickel atoms.
To know more about groups, visit the below link:
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how many significant figures are in 6? thanks!
Answer:
There is only 1 sig figures in 6
Explanation:
There is no 0 after it so it is considered as only 1 significant figure
Another real-world example of a change is rust. Rust is iron oxide (Fe2O3), which results when iron is exposed to oxygen in the air. What are some indicators of rusting? Check all that apply. A) production of light B) color change C) formation of a solid D) formation of a gas
Answer:
c
Explanation:
Answer:
c
Explanation:
How many significant figures does the number have?
9,000,100
Answer:
5 Significant Figures
Explanation:
Explain why burning of wood and cutting it into small pieces are considered as two
different types of changes.
Answer:
When wood is burnt , it turns into ashes which is a new substance and process is irreversible one,( chemical change)
When wood is cut into smaller pieces (firewood) this is a physical change
Explanation: