Answer:
A
Explanation:
A student is attempting to identify an unknown liquid. She places 10 mL of the liquid in a test tube and begins heating it over a burner. She checks and records the temp every minute until it begins to boil. What is the independent variable?
Answer:
The time of heating
Explanation:
Let us analyse the experiment closely; the temperature of the liquid increases as the time of heating increases. This implies that the temperature of the liquid is dependent on the time of heating of the liquid. The longer the time of heating, the greater the increase in temperature until the boiling temperature is eventually attained.
Hence, the temperature of the liquid is the dependent variable, the time of heating is the independent variable when the heating rate is held constant.
Which event most likely occurs at point V?
cooling
erosion
heating
melting
I will mark Brainlyest and 20 points
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Actually Welcome to the Concept of the Geography.
Answer is 1.) Cooling.
On cooling of magma, we get the hardened igneous rocks in the nature.
Answer:
Cooling
Explanation:
I did quiz
How does the circulatory system work at the tissue level?
Answer:
Answer. Answer: The circulatory system is a network consisting of blood, blood vessels, and the heart. This network supplies tissues in the body with oxygen and other nutrients, transports hormones, and removes unnecessary waste products.
Explanation:
Answer:
ME AND YOU HAVE THE SAMEEEE USER BUT LOOK
The circulatory system is a network consisting of blood, blood vessels, and the heart. This network supplies tissues in the body with oxygen and other nutrients, transports hormones, and removes unnecessary waste products.
Explanation:
help me please!
Thermal energy can come from other forms of energy. Give several examples how.
i'm getting graded for this!!!
Question 1: The mixture that can be separated by filtration is:
a-iron and water.
b- salt and water.
c- vinegar and water.
Question 2: The solid remains on the filter paper is called:
a- filtrate.
b- distillate.
c- residue.
Question 3: The liquid that pass through the filter paper is called:
a-filtrate.
b-distillate.
c-residue.
Answer:
Filtration is a process in which insoluble matter is separated from a liquid. Filtration is a separation process in which a mixture is passed through a filter that allows one component to pass-through but blocks another component from passing through because of its matter and consistency. Heterogeneous mixtures can be separated into their respective constituents. For example, a mixture of mud and water can be separated through filtration process easily, because water being liquid will pass through the filter paper easily but the mud will not because of it being solid
Answer:
Q1 b.
Q2 a
Q3. b
Explanation:
filteration= separate solids from liquids or gases using a filter medium.
Which element would have chemical reactions most similar to fluorine (F)?
A. O
B. Br
C. Ne
D. Fm
giving brainliest if right
[tex]\mathrm {Hey, there!}[/tex]
The answer is: Bromine
Oxygen is not similar to flourine, it is not a noble gas with high ionization.
Neon does not have chemical reactions like flourine.
The answer is Bromine! Best of Luck!
Answer:
Br
Explanation:
What particles form the nucleus of an atoms?
Answer:
Protons and neutrons
Explanation:
The particles to forms the nucleus of an atom are the protons and neutrons of the atoms.
These materials are located in the tiny nucleus and contributes the most mass of the atom.
Protons are the positively charged particles in an atomNeutrons do not carry any charges. Sum of the protons and neutrons gives the mass number of the atom.Which bond is a very strong dipole-dipole force?
A. A covalent bond
B. An ionic bond
C. A hydrogen bond
D. A metallic bond
Answer : C. A hydrogen bond
Explanation:
Answer:
A. covalent bond
Explanation:
dipole-dipole interaction results from difference in electronegativity , eg H-F where Fluorine has strong electronegativity but Hydrogen has less electronegativity. hence the bond has dipole moment towards F atom.
A gas occupies a volume of 0.444 L at 0.00C and
79.00 kPa. What is the final Kelvin temperature when
the volume of the gas is changed to 1880. mL and the
pressure is changed to 38.70 kPa?
Include unit of measurement and use proper
significant figures.
Answer:
The final temperature is 566°K
Explanation:
Given
V1 = 0.444L
T1 = 0.00°C
P1 = 79.00 kPa
V2 = 1880mL
P2 = 38.70 kPa
Required
Determine the final temperature of the gas
To answer this, we make use of idea gas law equation.
This is:
(P1V1)/T1 = (P2V2)/T2
Convert V1 to mL
V1 = 0.444L
V1 = 0.444 * 1000mL
V1 = 444mL
Convert T1 to Kelvin
T1 = 0.00°C
T1 = 0.00 + 273K
T1 = 273K
Substitute these values in the given equation.
(P1V1)/T1 = (P2V2)/T2
(79 * 444)/273 = (38.70 * 1880)/T2
35076/273 = 72756/T2
Cross Multiply
35076 * T2 = 273 * 72756
35076T2 = 19862388
Make T2 the subject
T2 = 19862388 ÷ 35076
T2 = 566K (approximated)
Hence, the final temperature is 566°K
If 100 yards = 1 football field, what is the length, in meters, of 4.9
football fields?
Suppose someone claims they have invented a new automobile engine that can produce more energy than is found in the fuel used to run it. Apply scientific principles to evaluate the person's claim.
Answer:
See explanation
Explanation:
According to the second law of thermodynamics, the conversion of energy from one form to another is never hundred percent efficient. Some energy is always lost as energy is transformed from one form to another.
When a fuel is used to run an automobile engine, chemical energy from the fuel is converted into to the mechanical energy of the automobile. This energy conversion can never be hundred percent efficient in accordance with the laws of thermodynamics. Some energy is always lost as heat.
Hence, the engine does not even efficiently convert all the chemical energy available in the fuel. Therefore, it is impossible to find an automobile engine that can produce more energy than the fuel used to run it.
Biologists designed an experiment to test the effect of compost on the development of root crops. They tested several different crops, including carrots, potatoes, beets, and onions. They grew most of the plants in the greenhouse, but due to space issues, they had to grow some outdoors. They gave all the plants the same amount of compost. They obtained the compost from a local farmer and from the local hardware store. They ran out of the farmer’s compost, so some of the plants received that compost when the seeds were planted and other plants got hardware store compost after the plants had already started growing.
RESULTS: Some of the roots seemed really big. Other roots seemed normal or small.
CONCLUSION: They couldn’t tell what the effect of the compost was because the results were inconsistent.
What are five problems with this experimental design that could have caused inconsistent results?
Answer:
it is 56
Explanation:
Answer:
one of the problems are that sum of the plants weren't getting the same kind of compost the second issue is that they couldn't fit all the plants into the greenhouse third issue issue was that some plants got compost when planted but what about the others
I got this answer from one of the WRONG answers. This was in the comments. So thanks to them!
Formaldehyde, CH20, and acetic acid, C2H4O2, have the same empirical formula but different?
kinds of cations.
kinds of atoms.
b. kinds of anions.
d. molecular formulas.
Explanation:
molecular formula
....
Formaldehyde, CH20, and acetic acid, C2H4O2, have the same empirical formula but different molecular formulas. Therefore, option D is correct.
What is Chemical formula ?A chemical formula lists the elements that comprise the compound as well as the number of atoms of each element in the compound's smallest unit, whether a molecule or a formula unit. Knowing the elements' names and a few basic rules allows us to name simple compounds given a chemical formula.
Chemical formulas are classified into three types: empirical, molecular, and structural.
Empirical formulas depict the simplest whole-number ratio of atoms in a compound, whereas molecular formulas depict the number of each type of atom in a molecule and structural formulas depict how the atoms in a molecule are bonded to each other.
Thus, Formaldehyde, CH20, and acetic acid, C2H4O2, have the same empirical formula but different molecular formulas, option D is correct.
To learn more about the chemical formula, follow the link;
https://brainly.com/question/29031056
#SPJ6
Which of the following is true about a hypothesis that is proven to be inaccurate? WILL GIVE BRAINLIEST FOR CORRECT ANSWER!!
A. An inaccurate hypothesis is not valuable.
B. It allows the scientist to eliminate any possibility of a relationship between two variables.
C. It will provide information to help formulate a new hypothesis in the future.
D. It proves that the exact opposite of the hypothesis is true.
Answer:
C. It Will Provide information to help formulate a new hypothesis in the future.
Explanation:
I had AP Chemistry.
The following statement that it will provide information to help formulate a new hypothesis in the future is true about a hypothesis that is proven to be inaccurate.
What is hypothesis?Hypothesis can be defined as an assumption which is made for the sake of argument . It is an interpretation of a practical condition for which action needs to be taken.It is defined as a tentative assumption which is made to test logical consequences.It is an antecedent clause of a statement which is conditional.
It is constructed before research. There are six types of hypothesis 1)simple hypothesis 2) complex hypothesis 3) directional hypothesis 4)non-directional hypothesis 5) null hypothesis 6)casual hypothesis
The hypothesis should be clear and precise, it must be specific and way of explanation of hypothesis should be simple.
Learn more about hypothesis,here:
https://brainly.com/question/13025783
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Which number is the same as 4.8 x104
a. 0.00048
b. 480000
C. 48000
d. 480
Answer:
I'm Pretty Sure It Would Be C
Answer:
C it is yeah...°∆°
Explanation:
......
What is the mass of an object that is accelerated 4 m/s2 by a force of 180 N?
kg
Asap!!!!!!!
Answer:
The answer is 45 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]m = \frac{180}{4} \\ [/tex]
We have the final answer as
45 kgHope this helps you
Answer:
I am so sorry but I need pts...
Explanation:
What reaction shows a compound breaking apart into separate substances?
Answer:
Explanation:
decompostion reaction
:answer question number 7
Answer:
Volume
Explanation:
yo brother these are so easy, just study bro. I helped you answer 3 already lol
whatever.
Hope I helped :)
Elsa is making a grilled ham-and-cheese sandwich. She uses a 20-gram slice of cheese, 40 grams of sliced ham, and two 15-gram slices of bread. After she heats the sandwich on a griddle, the cheese is melted. What will be the mass of her sandwich?
90 grams. When the state of an object changes, the mass doesn’t change.
*edited*
which of the following is the name given to the pairs of valence electrons that do not participate in bonding in diatomic oxygen molecule? A. unvalenced pair B. outer pair C. inner pair D. unshared pair
The name given to the pairs of valence electrons that do not participate in bonding in diatomic oxygen molecule is called Unshared pair
Unshared pair of electrons are also called Free radicals, lone pair or non bonding pairs, they refer to electrons that do not take part in covalent bonding of molecules.
Unshared pair together with shared pair occupy the valence electron shell and make up the valence electrons.
Diatomic oxygen molecule has 4 pair of unshared electrons
See more here: https://brainly.com/question/15451932
What is the energy of the photons of a laser with a frequency of 5.75 x 10^12 Hz? (Hint: Remember to round your answer to the lowest number of significant figures.)
Planck's Constant =6.626 X 10^-34
Energy of a photon = Plancks constant x Frequency
Answer:
E = 3.81×10 ⁻²¹ J
Explanation:
Given data:
Frequency of photon = 5.75 ×10¹² Hz
Plancks constant = 6.626 ×10⁻³⁴ Js
Energy of photon = ?
Solution:
E = h×f
E = 6.626 ×10⁻³⁴ Js × 5.75 ×10¹² s⁻¹
E = 38.1×10 ⁻²² J
E = 3.81×10 ⁻²¹ J
1 mol of titanium,
Ti, is 47.88 g is that true?
Answer: True.
Explanation:
Molar mass is the mass of a given substance divided by the amount of that substance, measured in g/mol. For example, the atomic mass of titanium is 47.88 amu or 47.88 g/mol. In 47.88 grams of titanium, there is one mole, or 6.022 x 1023 titanium atoms.
The characteristic molar mass of an element is simply the atomic mass in g/mol. However, molar mass can also be calculated by multiplying the atomic mass in amu by the molar mass constant (1 g/mol). To calculate the molar mass of a compound with multiple atoms, sum all the atomic mass of the constituent atoms.
For example, the molar mass of NaCl can be calculated for finding the atomic mass of sodium (22.99 g/mol) and the atomic mass of chlorine (35.45 g/mol) and combining them. The molar mass of NaCl is 58.44 g/mol.
Someone knows how to solve this? It was found that 0.0005 mol of Ca (OH) 2 dissolved in 100 cm3 of solution is 80% dissociated. Calculate the pH of this solution.
Answer:
pH = 11.9
Explanation:
First, we determine the number of OH⁻ moles dissolved:
80% of Ca(OH)₂ is dissolved:
0.0005 mol * 80/100 = 4x10⁻⁴ mol Ca(OH)₂There are two OH⁻ moles per Ca(OH)₂ mol:
4x10⁻⁴ * 2 = 8x10⁻⁴ mol OH⁻Now we can calculate the molar concentration of OH⁻ (moles/L):
100 cm³ = 100 mL100 mL ⇒ 100/1000 = 0.1 L[OH⁻] = 8x10⁻⁴ mol / 0.1 L = 8x10⁻³ MThen we calculate the pOH of the solution:
pOH = -log[OH⁻] = -log(8x10⁻³ M) = 2.10Finally, we can calculate the pH of the solution using the equation
pH + pOH = 14pH = 14 - pOH = 14 -2.10pH = 11.9What mass of ethanol will release 410.0 J of heat when it cools
from 32.2°C to 19.1°C?
The specific heat of ethanol is 2.44 J/gºC.
12.8 g
(Don’t have explanation but it is right on CK-12)
why do scientists use scientideic notation?
Answer:
There is on reason why...
Explanation:
This is one reason astronomers and other scientists use scientific notation when working with very large or very small numbers. Scientific notation is a system for writing and working with numbers that makes it much easier to deal with numbers that are very small or very large.
There you go your awnser
What is the term that refers to the rate of change in an object’s velocity?
Group of answer choices
momentum
acceleration
force
speed
Answer: Acceleration
Explanation:
Acceleration. The rate of change of an objects velocity is essentially the derivative of the velocity which is acceleration
Which element below would you most likely expect to be a poor conductor of heat and electricity?
Answer:Nonmetals and rubber
Explanation: hope this helps
Answer:
phosphorus
Explanation:
non-metals are poor conductors
If he soundwave is producing sound with the steady pitch and is vibrating with a frequency of six waves per second then how many ways will be produced in four seconds
Answer:
n = 24 waves
Explanation:
As, the sound is produced with a steady pitch. Therefore, it means that there is no change in the pitch with respect to time. Hence, we can work with the following formula for frequency:
υ = n/t
where,
υ = frequency of sound wave = 6 waves/s
n = no. of waves = ?
t = time interval = 4 s
Therefore, using these values in the equation we get:
6 waves/s = n/4 s
n = (6 waves/s)(4 s)
n = 24 waves
Which of these are significant problems with bottled water?
Immense plastic use
Fossil fuel used to transport water
Water bottles can leach toxics into water
All of the above
Answer:
All the above
Explanation:
All the above
7 types of motion you experience through the day.
There is differ motion you go through the day translational, rotational, periodic, and non periodic motion.
Hope this helped you
Sorry if it wrong