Answer:
0.1 grams per millilitre
Explanation:
Explanation:
Density = Mass/Volume = 10 g/100 mL = 0.1 grams per millilitre.
0.1 grams per millilitre, The density is 10 kg/mL
What is density ?The density of a material can be defined as its mass per unit volume means it is the ratio between mass and volume, where the how much stuff an object has in a unit volume.
Density is a measurement of matter, where it shows how tightly matter is crammed together, it was discovered by the Greek scientist Archimedes
To calculate the density of an object, the mass (m) can be divided by the volume (v)
Density = Mass/Volume
The SI unit of density is kilogram per cubic meter (kg/m3) or in cgs unit of grams per cubic centimeter (g/cm3).
For example, Wood floats in water as it has lower density while anchor sinks because it has a higher density, similarly Helium balloons float because the density of the helium is lower than the density of air.
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when The appearance of a system changes does the mass of the system also change why why not
Your question has been heard loud and clear.
Well , if youre talking about chemistry , then yes youre right , Appearance and mass are totally different concepts , appearance of any substance only depends on how the surfaces absorb and relfect light. Mass , well it is constant for a system and will never change , appearance of a system may change but not because of mass.
Thank you
Why are there so many substances?
Answer:
first conclusion was that the whole world is made up of only 4 elements but as the time passed more elements were discovered... if the world would not contain more elements... you wouldn't be alive.
A snail can crawl 160 cm at an average speed of 4cm/min. if it crawled at an average speed of 5 cm/min instead , how much sooner would it take to reach the destination ?
how does the earth rotate?
Answer:
Earth's rotation is the rotation of Planet Earth around its own axis.
Explanation:
Earth rotates eastward, in prograde motion. As viewed from the north pole star Polaris, Earth turns counterclockwise.
What entropy change is associated with the reversible phase change from 1.0kg of ice to water at 0 ° C?
Answer:
1200 J/K
Explanation:
The formula for the entropy associated with a reversible phase change is
[tex]\Delta S= \dfrac{q_{\text{rev}}}{T}[/tex]
For a reversible phase change like melting,
[tex]q_{\text{rev}} = m\Delta_{\text{fus}}H[/tex]
Data:
Mass of ice = 1.0 kg
T = 0 °C
Calculations
1. Convert the mass of ice to grams
[tex]\text{Mass of ice} = \text{1.0 kg } \times \dfrac{\text{1000 g}}{\text{1 kg}} = \text{1000 g}[/tex]
2. Convert the temperature to kelvins
T = (0 + 273.15) K = 273.15 K
3. Calculate the heat needed to melt the ice
[tex]q_{\text{rev}} = m\Delta_{\text{fus}}H = \text{1000 g} \times \dfrac{\text{334 J}}{\text{1 g}} = \text{334 000 J}[/tex]
4. Calculate the entropy change
[tex]\Delta S = \dfrac{q_{\text{rev}}}{T} = \dfrac{\text{334 000 J}}{\text{273.15 K}} = \textbf{1200 J/K}[/tex]
9. What lab equipment is used to spread heat when heating to prevent glassware from cracking
breaking?
When a scientist uses reasoning to explain or interpret the things they observe
Answer:
Inferring is when a scientist uses reasoning to explain or interpret the things they observe
The study of the universe and how it
evolved is called
Answer:
this is your answer hope it helps you
what do you understand by Gas oline
Answer:
It is petroleum-derived product comprising a mixture of liquid aliphatic and aromatic hydrocarbons, ranging between C4 and C12 carbon atoms with the boiling range of 30–225°C
Explanation:
Gasoline is a mixture of paraffins, naphthenes, aromatics and olefins.
What are the lines around the nucleus called?
Answer:
am can u pliz tell me more about ur qtn
Explanation:
like a nuclear of a what
maybe a plant or and animal
Answer:
Orbiting electrons
Explanation:
Which term describes the process of making an economic decision by considering both the advantage and the problems that might arise from the decision
Answer:Cost benefit analysis
Explanation:
Production, distribution, exchange, consumption, saving, and investment of economic resources are all a part of economic decisions. Public and private objectives. Economic choices are made in order to further the interests of both the general public and private persons and organizations (public goals).
The purchase of a device at a specific price is a straightforward illustration of an individual economic decision. This person will have to decide whether it is worthwhile to use his or her limited financial resources to purchase a device. A family's financial decision is virtually analogous, except that it involves more people this time.
The laws of supply and demand are used in the marketplace to guide economic decisions. The term describes the process of making an economic decision as a cost-benefit analysis.
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About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter
What is the ph of 0.00035 M KOH
Answer:
13.5
Explanation:
Potassium hydroxide fully ionizes when dissolved in water according to the following equation:
K
O
H
→
K
+
+
O
H
−
Now, let's find the relationship between
K
O
H
and
O
H
−
1
:
1
ratio
⇒
[
K
O
H
]
=
[
O
H
−
]
=
6.7
×
10
−
3
M
In any aqueous solution,
[
H
3
O
+
]
and
[
O
H
−
]
must satisfy the following condition:
[
H
3
O
+
]
[
O
H
−
]
=
K
w
[
H
3
O
+
]
=
K
w
[
O
H
−
]
[
H
3
O
+
]
=
1.0
×
10
−
14
6.7
×
10
−
3
[
H
3
O
+
]
=
1.5
×
10
−
12
M
Now, after finding the concentration of the hydronium ion, the pH of the solution is determined:
p
H
=
−
log
[
H
3
O
+
]
p
H
=
−
log
[
1.5
×
10
−
12
]
p
H
=
11.83
Other Method
Find the pOH using the concentration of the hydroxide ion, then use the formula
p
H
+
P
O
H
=
14
to find the pH.
The -Hasselbalch equation may be used to get the pH of 0.00035 M KOH.
What is the way for calculating the pH ?According to this formula, the pH of a solution is determined by adding the pKa of the acid and the logarithm of the base to acid ratio. KOH has a pKa of 14.0.
Therefore, the following formula can be used to determine the pH of the 0.00035 M KOH solution: pH = 14.0 + log (0.00035/1) pH = 14.0 - 3.46 As a result, the pH of the KOH solution at 0.00035 M is 10.54. Since KOH is a strong base, it completely dissociates in water, forming a solution that is made up of K+ and OH- ions.
Water reacts with hydroxide ions to make hydronium ions (H3O+), which are created when a strong base is introduced. The amount of hydronium ions in the solution rises as a result of this reaction, which lowers the pH of the liquid.
A KOH solution with a pH of 0.00035 M has a value of 10.54, which is higher than the pH of pure water (7.0). This is because when KOH dissociates in water, hydronium ions are produced. A solution's acidity or alkalinity can be determined using the pH of a 0.00035 M KOH solution.
A solution's pH is measured between 0 and 7, with 7 being neutral or alkaline and 0 being acidic. Since 0.00035 M KOH has a pH of 10.54, which is higher than 7, the solution is either basic or alkaline.
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Dog a is given one cup of food. Dog b is given 1/2 cup of food . Dog.c is given two cups of food at the end of the year dog c weighs the most. What is the the independent and dependent variable
Dependent variable: Weight
Independent variable: Amount of food
Explanation:
In experiments such as the one described, there are two or more factors involved, which act as variables. Additionally, these factors can be classified as dependent or independent. The difference between these two is that the independent factor is changed on purpose by the researcher. This occurs with the amount of food as each dog receives a different amount of food and this is controlled by the researcher.
On the other hand, the dependent variable is the main factor analyzed in the experiment or the factor that is modified by the independent variable. In the experiment presented, the dependent variable is weight because in this experiment the focus is to analyze how weight changes with different amounts of food, and this factor is affected by the independent variable.
The symbol of the element with atomic number 114.
Answer: Fl
Explanation:
If you go onto the periodic table, you find the element that has the atomic number 114. It is located in period 7 and Group 14.
Answer:
[tex]\huge \boxed{\mathrm{Fl}}[/tex]
Explanation:
In the periodic table, the element with an atomic number of [tex]\sf 114[/tex] is Flerovium.
The symbol for the element Flerovium is [tex]\sf Fl[/tex] .
HeLp ASAP pls need it rn
Answer:
I'm pretty sure is a mixture
1. Review the information in the table below. Use the information to calculate rate of how many sandwiches are made in a 10-minute period. The first calculation has been done for you.
Answer:
The answer to your question is given below.
Explanation:
Rate is simply defined as quantity per unit time. Mathematically it is represented as:
Rate = Quantity /time
Thus, we can obtain the rate as follow:
1. Quantity = 20 sandwich
Time = 10 mins
Rate =?
Rate = Quantity /time
Rate = 20/10
Rate = 2 sandwich per mins
2. Quantity = 30 sandwich
Time = 10 mins
Rate =?
Rate = Quantity /time
Rate = 30/10
Rate = 3 sandwich per mins
3. Quantity = 40 sandwich
Time = 10 mins
Rate =?
Rate = Quantity /time
Rate = 40/10
Rate = 4 sandwich per mins
4. Quantity = 50 sandwich
Time = 10 mins
Rate =?
Rate = Quantity /time
Rate = 50/10
Rate = 5 sandwich per mins
Thus, the complete table is given as follow:
Quantity >> Unit of measure >> Rate
10 >>>>>>> 10 min >>>>>>>>>> 1
20 >>>>>>> 10 min >>>>>>>>>> 2
30 >>>>>>> 10 min >>>>>>>>>> 3
40 >>>>>>> 10 min >>>>>>>>>> 4
50 >>>>>>> 10 min >>>>>>>>>> 5
write the IUPAC name the following
Answer:
1. Chloro(methylchloranuidyl)methane
2. 1-Chloro-3,3-dimethylbutane
3. 2-bromobutane
Question 3 (1 point)
There are 4 slices of pepperoni pizza, 1 slice of sausage pizza, and 3
slices of cheese pizza left. Without looking, Mr. Sanchez took his first
slice of pizza, ate it, and then took another slice. What is the
probability of getting the first slice pepperoni and the second cheese.
Answer make sure yu read bk the answer is in the question
Explanation:
Answer:
4/8 for pepperoni and 3/8 for cheese
Explanation:
Try these!
Mendeleev's arrangement of elements in the periodic table was based on the observations and experiments of his predecessors who studied the mass and properties of elements. (2 points) True False
Answer: True
Explanation:
Mendeleevs periodic classification is based on the atomic masses of the elements.
where did the mass of the forest tress come from? What happen to that mass when the forest burns?
Answer:
The mass of the forest comes from carbon and carbon is retrieved from carbon-dioxide that trees used during the process of photosynthesis. In the process of photosynthesis, carbon-dioxide is utilised from the atmosphere by trees and release oxygen and ATP.
When the forest burns the mass again releases to atmosphere in the form of carbon which causes air pollution and increases carbon content in the atmosphere.
A car is traveling at 88 ft/sec. What is the car's speed in miles/hour?
the atomic mass of the element cobalt is 58.933 atomic mass units. if a scientist measures the mass at 57.514 atomic mass units, what is the percent error?
Answer:
The percentage error is -2.4 %
Explanation:
The percentage error is calculated by the following formula;
[tex]Percentage \ error = \dfrac{Approximate - Exact }{Exact}[/tex]
The given parameters are;
The atomic mass of cobalt = 58.933 amu. = The exact value
The mass of cobalt as measured by the scientist = 57.514 = The approximate value
Therefore, the percentage error is given plugging in the values into the above equation for percentage error as follows;
[tex]Percentage \ error = \dfrac{(57.514- 58.933 )}{58.933 } \times 100 = -2.41\%[/tex]
The percentage error = -2.4 %.
Question 9
9. A substance has no definite shape or form.
True
False
Answer:
it us false
Explanation:
air and gas don`t have definite shape
but solid have all definite
Which Prosthetic groups are complex nonprotein molecules that participate in catalysis by providing functional groups that form a covalent intermediate between the enzyme and the substrate. Which of the following is an example of a coenzyme or cofactor that participates in a covalent catalysis reaction?
a. Pyridoxal phosphate
b. Sodium phosphate
c. Potassium chloride
d. None of the above
Answer:
A
Explanation:
Pyridoxal phosphate is your answer
Which of the following statements most likely
explains why Einstein thought forming a problem
is more important than solving it?
It is harder to think of a problem to solve than
to solve the actual problem.
Forming a problem requires the scientist to
use creativity to imagine new solutions.
It is hard to think of new questions to answer
because so many have already been
answered.
Scientists who are not imaginative are not
very good problem solvers.
Answer:
Forming a problem requires the scientist to use creativity to imagine new solutions.
Explanation:
Albert Einstein remains a critically prominent figure who conducted remarkable, ground-breaking research that not only formed the foundations of modern physics but also strongly affected the scientific world. It is difficult to teach imagination but it can be harnessed and accepted. Nothing incites our imaginative impulses we love more than the prospect of immediate creative inspiration. And creativity hits its full potential when paired with the experience, insights, and skills people gained by questioning the real-life problems.
Answer:
Your answer would be B, forming a problem requires the scientist to use creativity to imagine new solutions.
Explanation:
Got it right on Edge 2020. Hope this helps you!
A galaxy is a system of celestial bodies, such as stars, planets, several solar systems, and interstellar gas and dust. Our solar system is a part of a galaxy called
Answer:
The Milky Way
Explanation:
Answer:
The Milky Way
Explanation:
Please answer both questions.
1. An ion formed from an atom has a 1- charge. The number of electrons present in the ion is 36 and the number of neutrons is 46. Identify the element.
options: chlorine, bromine, krypton, rhodium.
2. Identify which of the following particle(s) contain more electrons than neutrons.
I. 11H
II. 35 17Cl−
III. 23 11Na+
Answer:
1)Krypton
2)11H
Explanation:
electrons=protons
protons=atomic number
mass number=protons+neutrons
mass number is the superscript
atomic number is the subscript.
1)The answer is Krypton because its atomic number= number of protons=number of electrons is 36.
mass number is 46+36=82.
2)subscript=atomic number=number of protons=number of electrons
i. H = electrons=1
=neutrons=0
ii. Cl=electrons=17
=neutrons=35-17=18
iii. Na=electrons=11
=neutrons=23-11= 12
so the answer is Hydrogen because it has 1 electron and 0 neutron.
I hope this helps.
A chemist wants to examine specific chemical reactions and isolate certain products using a controlled experiment. How would the chemist perform this experiment?
Answer:
in a laboratory
Explanation:
A controlled experiment refers to the one where everything is an experiment except a single variable is held constant. A collection of information is typically taken as a control group, which is generally the ordinary state, and another group is analyzed( such as chemical reaction as per the question) in which all conditions are similar to the control group except for the variable under examination. The main benefit of a controlled experiment is that confusion over the accuracy of the results can be eliminated more easily.
If Lauren runs a 100 m race in 17.0 seconds, what is her time in minutes and how long does she run in kilometers?
Answer:
0.283 min.
0.1 km
Explanation:
Since there are 60 seconds in 1 minute, divide the time Lauren ran by 60.
17/60 = 0.283 min.
Since there are 1000 meters in 1 kilometer, divide the distance by 1000.
100/1000 = 0.1 km