Answer:
Calcium hope it helped
Explanation:
Help me with this plz
Answer:
3.6 moles
Explanation: i got that quistion right .
What is significant about the temperature absolute zero?
Explanation:
The absolute temperature is the lowest possible temperature in the universe. At this temperature, all atoms become motionless and cease to move.
The value of the absolute zero is pegged at -273.16°C.
It is the lowest limit of the coldness of a body. Nothing can be colder than a body at absolute temperature. Many researches are underway to take advantage of this temperature value for scientific purpose. Thermodynamically, all process stops at this temperature. When a body is brought close a body at absolute zero, it can suffer cryogenic burn due to heat transfer.What is drag? In what situations might it act on the force of gravity?
(Please don´t use to many big words- it gets confusing ;-;)
For the balanced equation shown below, if the reaction of 91.3 grams of C3H6 produces a 73.3% yield, how many grams of CO2 would be produced?
2C3H6+9O2=>6CO2+6H2O
Answer: The answer is 233.3 g
Explanation: The problem is, do you trust me?
The diameter of the sun is 1.392 x 106 km. Write this number in standard notation.
Answer:
1.392 X 106 in satndard form is 147.552. In scientific Notation, it is 1.47552 X 10²
Explanation:
To put it in standard form you multiply 1.392 by 106.
To put it in scientific notation you move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.
are CH4 and CH3OH soluble in water?
CH4 is not soluble in water
whereas CH3OH is soluble in water.
Answer:
CH4 is non polar covalent compound and non polar covalent compounds are insoluble in polar covalent compounds like water.
And CH3OH is soluble in water because it polar and also due to hydrogen bonding.
1,200 cal of heat energy is added to a liquid with a specific heat of 0.57 cal/g°C. If the temperature increases from 20.°C to 33°C, what is the mass of the liquid?
Answer:
The mass of the liquid = 162 g
Explanation:
As we know ,
Q = mc (ΔT)
where Q = Heat energy of the liquid
c = specific heat of the liquid
ΔT = change in temperature
m = mass of the liquid
As given , the temperature increases from 20.°C to 33°C,
⇒ ΔT = 33 - 20 = 13°C
Also given , c = 0.57 cal/g°C
Q = 1200 cal
∴ we get
1200 = (m)(0.57)(13)
⇒ 1200 = m(7.41)
⇒m = [tex]\frac{1200}{7.41}[/tex] = 161.943 ≈ 162 g
So, we get
The mass of the liquid = 162 g
Find the percent composition of each element in the molecule Ndos
Help plz
Answer: Percent composition is calculated from a molecular formula by dividing the mass of a single element in one mole of a compound by the mass of one mole of the entire compound. This value is presented as a percentage.
Explanation: I hope that helped!
Which statement describes the way in which energy moves between a
system of reacting substances and the surroundings?
A. Molecular collisions create energy that is then released into the
surroundings.
B. The potential energy of the system and its surroundings
increases.
C. Molecular collisions transfer thermal energy between the system
and its surroundings.
D. The thermal energy of the system and its surroundings increases.
Answer:
it c
Explanation:
just took the quiz
The statement, that describes the energy moves between a system of reacting substances and the surroundings is "molecular collisions transfer thermal energy between the system and its surroundings"
What is energy?Energy is the ability to perform tasks. Energy is a quantitative property that is transferred to a body or a physical system and is visible in the performance of work as well as in the appearance of heat and light. It can take the shape of a potential, kinetic, thermal, electrical, chemical, radioactive, or other substance. Collisions between molecules transmit energy when two bodies come into contact. Molecules transfer thermal energy to one another by collision.
The warmer body transfers more energy to the cooler body until they achieve the same temperature. This is known as thermal equilibrium. This is known as 'energy transferred as heat.'
Hence the correct answer is molecular collisions transfer thermal energy between the system and its surroundings.
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Choose the topic that will not be studied in a physical science course.
chemical reactions
electricity
states of matter
natural selection
Answer:
The answer is Natural selection
C 203 + 3C - 2Cr + 3CO
If the experimental yield obtained was 18.45 g of Cr, but you should have produced 535 g of Cr, what is the percent yield?
Answer:
b I think
Explanation:
my guyyyyanajja
CCI4 calculate the molar mass
Answer:
The molar mass of carbon is 12.011 g/mol. The molar mass of chlorine is 35.45 g/mol. The molar mass of carbon tetrachloride is 153.81 grams per mole.
Explanation:
Hope this helps
PLS HELP, WILL REWARD BRAINLIEST :)
Answer:
mineral
vitamins
carbohydrates
protien
fat
Please help!
True or false? Strong acids such as nitric acid ionise completely when dissolved in water.
What are the three ways that an object can interact with a static field?
Answer:
friction, conduction, and induction
Explanation:
Water drops on the outside of a glass of iced tea are an example of:
A- condensation
B- evaporation
C- a leaky glass
D- transpiration
Answer:
A. Condensation
Explanation:
That's the answer to this question
Answer:
A: condensation
Explanation:
it's the right answer
I really need help guys in order to pass this. its kinda urgent!
Help please and if you say for points I will report you :)
Answer:
radiation
Explanation:
Answer:
radiation
Explanation:
I WILL MARK YOU BRAINLIEST!!!!! A compound containing only carbon and hydrogen is found to contain 42.88% carbon. It has a molecular weight of 56.02. What is its molecular
formula?
Please show me how you solved it, it would really be appreciated
Answer:
C₂H₃₂
Explanation:
Given parameters:
Mass percentage of carbon = 42.88%
Mass percentage of hydrogen = 100 - 42.88 = 57.12%
Molecular weight = 56.02
Unknown:
Molecular formula = ?
Solution:
To solve this problem, we need to find the empirical formula of the compound first. The empirical formula is the simplest formula of a substance.
Therefore;
Elements Carbon Hydrogen
Percentage
composition 42.88 57.12
Molar mass 12 1
Number of moles 42.88/12 57.12/1
3.57 57.12
Simplest
ratio 3.57/3.57 57.12/3.57
1 16
Empirical formula of the compound is CH₁₆
Molar mass of CH₁₆ = 12 + 16(1) = 28g/mol
Multiplying index = [tex]\frac{molecular weight}{28}[/tex] = [tex]\frac{56.02}{28}[/tex] = 2
Molecular formula = (CH₁₆)₂ = C₂H₃₂
Will combining water and baking soda make a chemical reaction?
Answer:
The baking powder reacts with water to produce bubbles, while baking soda does not react with water.
Explanation:
Answer:
yes
Explanation:
no
Why does the Moon have a greater effect on the tides than the Sun?
A. The Moon is larger than the Sun.
B. The Moon is closer than the Sun to Earth.
C. The Moon is solid while the Sun is gaseous.
D. The Moon rotates more quickly than the Sun.
PLEASE HELP ITS DUE TODAY :/
Answer:
The correct answer is B.
Explanation:
I hope this helps. :)
What type of reaction is CH4 = c+2h2
Answer:
An exothermic reaction
what do you use to mesure wind
Answer:
Either a windmill or an anemometer
Explanation:
A windmill is usually used as a harvester for wind energy. Anemometers measure wind speed and determine wind direction. Using these sets of data, meteorologists can calculate wind pressure.
Please Help! :)
Calcium carbonate decomposes to form carbon dioxide and calcium oxide:
CaCO3(s) -------> CO2(g) + CaO(s)
How many grams of calcium carbonate will be needed to form 3.45 liters of carbon dioxide at 740 mm Hg and 121 °C?
Answer:62684
Explanation:
In the diagram above, what is the temperature doing while the ice is
melting?
We can't tell from this diagram
Decreasing
Staying the same
Increasing
Answer:
temperature is increasing
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A balloon at 25°C has 30 L. What will the balloon's volume at 35°C?
Answer using that method
The balloon's volume at 35°C : V₂=31.01 L
Further explanationGiven
T₁ = 25°C+273 = 298 K
V₁ = 30 L
T₂ = 35 °C + 273 = 308 K
Required
The new volume (V₂)
Solution
Charles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
Input the value :
V₂=(V₁.T₂)/T₁
V₂=(30 x 308)/298
V₂=31.01 L
A reaction between copper metal and silver nitrate should theoretically produce 41.8 g Ag, however in the lab only 32.3 g Ag is actually produced. What is the percent yield of silver in this reaction?
Answer:
For these problems, we need to compare the theoretical yield that we'd get from performing stoichiometry to the actual yield stated in the problem. % yield is the actual yield/theoretical yield x 100%
Cu + 2 AgNO₠→ Cu(NOâ‚)â‚‚ + 2 Ag ==> each mole of copper yields two moles of silver
12.7-g Cu x ( 1 mol Cu /63.5-g Cu) x ( 2 mol Ag / 1 mol Cu) x (108-g Ag / 1 mol Ag) = 43.2-g Ag. This is the theoretical yield. Now, since we got 38.1-g Ag our % yield is:
38.1-g/43.2-g x 100% = 88.2%
A reaction between copper metal and silver nitrate should theoretically produce 41.8 g Ag, however in the lab only 32.3 g Ag is actually produced. 12.9% is the percent yield of silver in the given reaction.
What is percent yield?The % ratio of the theoretical yield to the actual yield is known as the percent yield. It is calculated as the theoretical yield multiply by 100% divided by the experimental yield. The percent yield equals 100% if the theoretical and actual yields are equal.
Because the real yield is frequently lower than the theoretical value, percent yield is typically lower than 100%. This may be due to incomplete or conflicting reactions or sample loss during recovery.
percent yield = (theoretical yield/experimental yield)×100
percent yield = (41.8/ 32.3)×100
= 12.9%
Therefore, 12.9% is the percent yield of silver in the given reaction.
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Can someone pls help me with this pls
Answer:
I would say element
Explanation:
because it is made of two different types of atoms chemically bonded together!
I'm sorry if wrong!
an ice cube is placed in the sun. later there’s a puddle of water. then later on the puddle is gone. is this a physical or chemical change?
Answer:
chemical
Explanation:
because the water puddle disappeared, it is no longer H2O, which is a chemical change
Answer:
chemical
Explanation:
why do minerals only form in certain areas?
Answer:
The chemicals differ depending on what the surrounding area is like.
