Answer: A. They were traveling through different types of rocks
Explanation:
Which is a gas at room temperature?
Answer:
Several of the nonmetals are gases in their elemental form. Elemental hydrogen (H, element 1), nitrogen (N, element 7), oxygen (O, element 8), fluorine (F, element 9), and chlorine (Cl, element 17) are all gases at room temperature, and are found as diatomic molecules (H2, N2, O2, F2, Cl2).
Explanation:
Answer: B
Explanation:
Which molecule would diffuse faster So, or SO,? Explain your reasoning.
The given question is incomplete. The complete question is:
Which molecule would diffuse faster [tex]SO_2[/tex], or [tex]SO_3[/tex],? Explain your reasoning.
Answer: [tex]SO_2[/tex] will diffuse faster as it has low molecuklar weight.
Explanation:
From Graham's law of diffusion rates, the rate of diffusion of a gas is inversely proportional to the square root of its molar mass.
[tex]Rate\propto \sqrt\frac{1}{M}[/tex]
or [tex]\frac{Rate_1}{Rate_2}\propto \sqrt\frac{M_2}{M_1}[/tex]
Molecular mass of [tex]SO_2[/tex] is 64 g/mol and Molecular mass of [tex]SO_3[/tex] is 80 g/mol
Thus as molecular mass of is less , it will diffuse faster.
Calculate: A. Mercury has a specific Heat Capacity of 0.14 J/goC. How much heat is needed to raise the thermometer temperature 15 oC to 95 oC. There is 5 g of mercury in the thermometer.
Answer:
[tex]\boxed {\boxed {\sf 56 \ Joules}}[/tex]
Explanation:
We are given the mass, specific heat, and temperature, so we must use this formula for heat energy.
[tex]q=mc \Delta T[/tex]
The mass is 5 grams, the specific heat capacity is 0.14 Joules per gram degree Celsius. Let's find the change in temperature.
ΔT= final temperature - initial temperature ΔT= 95°C - 15°C = 80°CWe know the variables and can substitute them into the formula.
[tex]m= 5 \ g \\c= 0.14 \ J/ g \ \textdegree C \\\Delta T= 80 \ \textdegree C[/tex]
[tex]q= (5 \ g )( 0.14 \ J/ g \ \textdegree C ) ( 80 \ \textdegree C)[/tex]
Multiply the first numbers. The grams will cancel.
[tex]q= 0.7 \ J/ \textdegree C(80 \ \textdegree C )[/tex]
Multiply again. This time the degrees Celsius cancel.
[tex]q= 56 \ J[/tex]
56 Joules of heat are needed.
Please Be Honest
Rate 1-10
1. Al Einstein drives north 3 blocks, then turns east and drives 3
blocks. Al then turns south and drives 3 blocks.
a. Plot Al's trip on the graph
b. How could Al have made his traveling distance shorter
while maintaining the same displacement?
Pls answer I will mark brainiest!!!
Look at the dots around each symbol and the energy levels from the resources above
Be specific with your responses for each question. Your teaching the reader via answers!
Please answer the following questions:
Why does Na(sodium) have only one dot?
Why do none of these diagrams show more than 8 dots?
What relationship do you notice between the dots in these two charts?
The number of dots that hydrogen and helium have in their dot diagram is the same as the number of electrons shown for them on the Periodic Table. Why? (Hint: OCTET RULE)
Hi! I'd love to help you if I can. Is there a picture that was provided? I'm sure I can assist you, but there seems to be some missing information.
2 CH3Oh + 3O2 + 2CO2 + 4 H2O how many liters of carbon dioxide will be formed form 6 moles of oxygen
Answer:
89.6 L of CO₂
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2CH₃OH + 3O₂ —> 2CO₂ + 4H₂O
From the balanced equation above,
3 moles of O₂ reacted to produce 2 moles CO₂.
Next, we shall determine the number of mole CO₂ produced by the reaction of 6 moles of O₂. This can be obtained as follow:
From the balanced equation above,
3 moles of O₂ reacted to produce 2 moles CO₂.
Therefore, 6 moles of O₂ will react to produce = (6 × 2)/3 = 4 moles CO₂.
Thus, 4 moles CO₂ were obtained from the reaction.
Finally, we shall determine the volume occupied by 4 moles CO₂. This can be obtained as follow:
1 mole of CO₂ occupied 22.4 L.
Therefore, 4 moles CO₂ will occupy = 4 × 22.4 = 89.6 L
Thus, 89.6 L of CO₂ were obtained from the reaction.
hellppppp!!!!
Which of the following is an example of chemical energy?
A. the heat of an oven
B. a plugged in toaster
C. an apple
D. a nuclear power plant
Which event is caused by gravity?
Answer:
C
Explanation:
Cause waves causes gravity to make higher waves
due in a bit! please help tysm btw!
Answer:
Unbalanced
Explanation:
Which of these is an example of a hypothesis?
HELP ASAP
Answer:
C. Temperature changes may be due to wind patterns.
Explanation:
A hypothesis is an attempt to explain why something happens. The other answer choices are different parts of the scientific method.
"A" is part of the experiment or procedure.
"B" is part of the experiment or procedure.
"D" is a question that may lead to a hypothesis.
Only C offers a potential testable explanation for a phenomenon.
Answer:
the answer is C: temperature changes may be due to wind patterns.
Describe a dinner you would like to eat that includes all the main nutrients, but is low in the nutrients that you should limit.
Dinner including grilled chicken,roasted brussels sprouts and cooked quinoa have all main nutrients and are low in carbohydrates.
What are carbohydrates?
A carbohydrate is defined as a bio-molecule which consists of carbon,hydrogen and oxygen atoms which are usually in the ratio of 2:1 with the empirical formula C[tex]_n[/tex](H₂O)[tex]_n[/tex].
This term is most commonly used in biochemistry as a synonym of saccharide which is a group of sugars, starch and cellulose.
They perform various functions in living organisms. They serve as an energy source and as well as structural components . They are a key component in providing nutrition and are found in wide variety of natural as well as processed foods.
Carbohydrates occur as cellulose in the cell walls of plants and is one of the components of insoluble dietary fibers.
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Which example describes how the water cycle carries on energy transfer? a flooding river depositing silt on a floodplain a warm ocean current warming the air above it ocean water depositing sand particles on a shore water seeping through the soil and dissolving salts
Answer:
The water cycle is driven primarily by the energy from the sun. This solar energy drives the cycle by evaporating water from the oceans, lakes, rivers, and even the soil. Other water moves from plants to the atmosphere through the process of transpiration.
In an ecosystem, the water cycle carrying on energy transfer is best exhibited the example of a warm ocean current warming the air above it .
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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The first organic compound synthesized was
urea
carbon dioxide
none of these
O
ammonia
urea is the answer :)
A neutral solution has what ratio of [H+] and [OH-] ions?
19 What is the "skin" of the cell?
Answer:
d cell membrane:)
Explanation:
name the type of chemical bonding involved in the formation of ammonium ion from ammonia
Answer:
When the ammonium ion, NH4+, is formed, the fourth hydrogen is attached by a dative covalent bond
Explanation:
because only the hydrogen's nucleus is transferred from the chlorine to the nitrogen. The hydrogen's electron is left behind on the chlorine to form a negative chloride ion.
distance time graphs are made by plotting data for time and what?
Answer:
A distance-time graph shows how far an object has travelled in a given time. Distance is plotted on the Y-axis (left) and Time is plotted on the X-axis (bottom).
You are practicing classification by sorting pictures into groups based on the characteristics of the kingdoms. While you are sorting, your little brother asks why you placed the above picture in the fungi kingdom. Which of the following explanations should you give your brother?
A.
It belongs in the fungi kingdom because it is unicellular and heterotrophic
B.
It belongs in the fungi kingdom because it is multicellular and can perform photosynthesis
C.
It belongs in the fungi kingdom because it can perform photosynthesis and does not have cell walls
D.
It belongs in the fungi kingdom because it has cell walls and is heterotrophic
Answer: D
Explanation: fungi kingdom is Hetrotropiv and is unicellular
how much is the mass of a man if
he has to do 2500 joules of work in
climbing a tree 5 meters tall
Answer:
50kg
Explanation:
Using the formula for potential energy, which is the amount of energy due to position;
P.E = m × g × h
Where;
m = mass (kg)
g = acceleration due to gravity (10m/s²)
h = height (metres)
According to the information provided in this question, m = ?, P.E = 2500J, h = 5m
Using P.E = m × g × h
m = P.E/gh
m = 2500/(5 × 10)
m = 2500/50
m = 50kg
The mass of the man is 50kg.
Helppp pleaseee
How many hydrogen atoms are indicated by the formula (NH4)2C7H10O2?
Answer:
The correct answer is - 18.
Explanation:
The number of hydrogen atoms is indicated by the formula (NH4)2C7H10O2 that has two parts (NH4)2 and C7H10O2 then
Number of hydrogen atoms in (NH4)2 = 4*2= 8
number of H atoms in C7H10O2 = 10
then the total number of atoms = 10+8
= 18.
Thus, the correct answer is = 18 hydrogen atoms.
Water is believed to be one of the best fire extinguishers then why it is so that fire in oil spills over ocean/sea is difficult to douse? Choose the most appropriate explanation.
a. Water has no effect on the Ignition temperature of oil
b. Oil is less dense than water and thus continues to undergo combustion
c. Density of oil and water has no bearing on the nature of fire and hence on the
extinguisher
d. All above statements are correct explanation for the given statement
Answer:
D
Explanation:
Trust me
McCray, Shy'Anne
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Nasha left a hot bowl of soup in a cool room. Her friend tells her that her soup will get cold if she forgets to eat it. How cold could it get?
Answer:
The temperature of soup will decrease.
The soup will get as cold as the room temperature.
The temperature of soup will decrease. The soup will get as cold as the room temperature.
What is room temperature?Room temperature is a range of air temperatures that most people prefer for indoor settings.
Room temperature is defined differently in different places. It generally refers to a range somewhere between 68 and 74 degrees Fahrenheit.
The temperature of soup will decrease. The soup will get as cold as the room temperature.
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Please help with this question, the options are circled in yellow.
Which of the following is a synthetic material that can be used as an inhibitor? *
Coal
Enzymes
Preservatives
Plastic
Answer: Enzymes
Explanation: entzymes are natural catalysts, e.g. Amylase is an enzyme
This is the equation for the combustion of carbon monoxide is: CO + O2
CO2
How many liters of oxygen are needed to burn 2.76 L of carbon monoxide?
Answer: 1,38 litres
Explanation: it should be 2 CO + O2 ⇒ 2 CO2
In Same temperature volumes are proportional
To amounts of substances. So amount of Oxygen is half of
Amount of CO
Answer: 1.38 L O2
Explanation:
2CO + O2 = 2CO2
So,
1 mole CO = 22.4 L CO
2 mole CO = (22.4 ×2)L CO
= 44.8 L CO
And 1 mole O2 = 22.4 L O2
44.8LCO are burned by 22.4LO2 1 L CO are burned by 22.4÷ 44.8
= 0.5 L O2
2.76L CO are burned by0.5×2.76
= 1.38 L O2
So, 1.38 L O2 are needed to burn
2.76 L CO
Calculate the percentage by mass of oxygen in trioxonitrate (v) acid, (HNO3). [ H=1, N=14, O=16]
Answer:
Percentage by mass of oxygen = 76.20% (Approx)
Explanation:
Given:
HNO3
H=1, N=14, O=16]
Find:
Percentage by mass of oxygen
Computation:
HNO3
Total mass = 1 + 14 + 3(16)
Total mass = 63
Mass of oxygen = (3)(16) = 48
Percentage by mass of oxygen = [48/63]100
Percentage by mass of oxygen = 76.20% (Approx)
which has the strongest intermolecular forces
Answer:
I think it is B
Explanation:
Answers: A
Explanation: just took the quiz on usatestprep
Pls what is the difference between the mass number and atomic number
Sandra pushed a wooden block and it slid across the floor. The wooden block gradually slowed down and stopped after moving 10 meters.
Why did the block stop moving?
Answer:
Because it lost momentum!
Explanation:
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