Answer:
because life would have use fossil for their benefits.
What do all living organisms in an area make up?
Fill in the blank,
The law of conservation of mass
says substances can neither be
nor
Answer:
created or destroyed
Explanation:
The law of conservation of mass tells us that during a chemical reaction, matter is neither created or destroyed; it can change from one form to another but there will be no gain or loss of mass.
What happens to the limiting reactant during the course of the chemical reaction?
Answer: The limiting reactant is the reactant that gets consumed first in a chemical reaction and therefore limits how much product can be formed.
Explanation:
^
1. A block of plastic occupies a volume of 25.0 mL and weighs 20.5 g. What is its density? Circle or highlight
the correct answer. (5 pts)
a. 512 g/mL
c. 0.37 g/mL
b. 1.62 g/mL
d. 0.82 g/mL
You start with a container that is 8L big and the temperature in the room is 326K.
If the you take the container out in the heat at 352K, how big will it get?
Answer:
The new volume is 8.64 L.
Explanation:
Charles's Law consists of the relationship that exists between the volume and the temperature of a certain quantity of ideal gas, which is maintained at a constant pressure. For a given sum of gas at constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases.
In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:
[tex]\frac{V}{T} =k[/tex]
Being an initial state 1 that modifies its conditions until a final state 2, it is fulfilled:
[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]
In this case:
V1= 8 LT1= 326 KV2= ?T2= 352 KReplacing:
[tex]\frac{8L}{326 K} =\frac{V2}{352 K}[/tex]
Solving:
[tex]V2=352 K*\frac{8L}{326 K}[/tex]
V2= 8.64 L
The new volume is 8.64 L.
Ammonia (NH3) is widely used as a fertilizer and in many household cleaners. How much ammonia is produced when 5.81 mol of hydrogen gas react with an excess of nitrogen gas?
Answer:
65.841 g
Explanation:
The balanced equation for this reaction is;
N2 + 3H2 → 2NH3
From the question, we are interested in ammonia and the hydrogen gas.
From the equation
3 mol of H2 produces 2 mol of NH3
5.81 mol would produce x
Solving of x;
x = 5.81 * 2 / 3
x = 3.873 mol
Converting to mass;
Mass = Number of moles * molar mass
Mass = 3.873 * 17 = 65.841 g
2 points
There is a connection between photosynthesis and cellular respiration.
The products from one provide the raw materials for the other. This image
shows the relationship between the two processes. What products of
photosynthesis are starting material for cellular respiration? *
Answer:
glucose and oxygen
Explanation:
Glucose and oxygen are needed for cellular respiration to occur:)
Guys help me
Please
Answer:
8.38×10raise to power 23
Explanation:
mass of sugar=density ×volume
=. 1.59g/ml×25ml=39.75
no. of miles= given mass/ molar mass
= 39.75/342.3g / mole
1 mole of sugar =C12 H22 O11
contains
12× 6.023 × 10 ∆23=72.28× 10∆ 23 ×6.023×10²³
= 8.38× 10²³
whether carboxylic acids are electrolytes
Answer:
??
Explanation:
Which of the following can be used as lubricant
Answer:
Explanation:
B is the ans
pls mark BRAINLIEST
A drug company is testing the effects of a new drug designed to prevent hair loss. Of the 2,000 people in the trial, 1,700 people receive the drug and the other 30 people receive a sugar pill. What is the purpose of the group receiving the sugar pill? A. The group is being used as the control group B. The group is being used as the dependent variable C. The group is being used as the independent variable D. The group is being used as the manipulated variable
Answer:
A
Explanation:
The correct answer would be that the group being given the sugar pill is being used as the control group.
In a typical experimental study, there are two groups of subjects:
1. The treatment or the experimental group
2. The control group
The treatment group receives the treatment variable while the control group does not receive or is given a placebo. Thus, the control group act as the reference group for comparison basis. Any difference in the observation between the two groups would be attributed to the treatment variable.
The correct option is, therefore, A.
What is the correct formula for Diphosphorus Hexoxide?
Answer:
Hey mate......
Explanation:
This is ur answer....
P₄O₁₀Hope it helps!
mark me brainliest pls.......
Follow me! :)
Can anyone solve this chemical reaction?
Answer:
1) BaCl2 + Na2O = BaO + 2NaCl
2) C4H8 + 6O2 = 4CO2 + 4H2O
3) MgCO3 + 2K = K2CO3 + Mg
4) N2 + 3F2 = 2NF3
To make 4.25 L of 3.0 M NaOH solution how much of a 9.0 M NaOH solution would be needed?
Answer:
1.41 L
Explanation:
Initially the concentration of NaOH was 9.0M (say M1) finally the concentration becomes 3.0M (say M2)
intial volume (say V1) is to be calculated when the final volume (say V2) is 4.25L
we have,
M1V1=M2V2
or V1=(M2V2)/M1= 3.0×4.25/9.0= 1.41L
Hence 1.41 L of 9.0M solution is required to prepare 4.25L of 3.0M NaOH solution
Which of the following processes occurs with a decreaseentropy of the system
Explanation: Entropy decreases when the number of moles of gas decreases during a reaction. In the case of the correct answer, the number of moles of gas decreases from two to one. When a substance goes from a solid to a gas (sublimation) or from a liquid to a gas (evaporation), entropy increases.
You need 65.0 g of aluminum for an experiment. How many atoms of aluminum is that?
Answer:
Explanation:
To convert the mass of Aluminum to atoms, we must first convert to moles by using the formula;
mole = mass/molar mass
Answer:N
=
9.69×1022 Al atoms
Explanation:
Just took quiz! xx
Earths seasons in Northern Hemisphere: Choose ALL that apply.
Question 4 options:
More concentrated sunlight makes for cooler temperatures
The summer solstice occurs when the earth is in a position so that the North Pole is tilted most directly toward the sun.
The atmosphere absorbs some of the sun's rays
The tilt and revolution of the earth as it moves around the sun cause the different seasons of the year.
The summer solstice occurs when the earth is in a position so that the North Pole is tilted most directly toward the sun.
What is the summer solstice?The summer solstice happens when a pole on either the northern hemisphere or southern hemisphere, is found most inclined toward the sun.
The summer solstice then represents two different moments during the year according to the hemisphere. The summer solstice happens on June 21, and this period represents the longest day of the year.In conclusion, the summer solstice occurs when the earth is in a position so that the North Pole is tilted most directly toward the sun.
Learn more in:
https://brainly.com/question/4172420
Answer: B and D also hi
Explanation:
1. If a 250 kg rock is sitting on the ledge of Ls cliff 295 meters high, then what is the
potential energy of the rock?
Answer:
Explanation:
P.E=M*G*H
P.E=250*10*295
P.E=737,500J
If 115grams of a substance reacts with 84grams of another substance, what will be the mass of the products after the reaction?
Which shows substances placed in order from strongest to weakest attractive forces at room temperature?
es )
A)
1. Br (s) 2. Br (9) 3 Br (1)
B)
1. Br (s) 2. Br (1) 3 Br (9)
1. Br (9) 2. Br (1) 3 Br (s)
D)
1. Br (aq) 2. Br (1) 3 Br (9)
Dhusical Dror
Explanation:
es la b es ciertos que es el resultado
What are the two major causes of genetic disorders in humans?
Answer:
genetic mutation or the environmental exposures
describe each of the three states of matter (solid, liquid, gas)
Explanation:
In a solid particles are firmly together and are stuck in a regular pattern
in a liquid particles still touch but arent in a fixed pattern
in a gas particles move quickly in all directions
Need help asap
Please help
Answer:
do u see my pfp its pico from newgrounds.com
Explanation:
Does anybody know how to do this if so please help !
Answer:
add x to 7 and divide by 3
Explanation:
easier formula
Pls help me with this problem
Answer:
2 and 5 would be my answers
Explanation:
Diamond is extremely hard and does not conduct electricity.
Which statement explains these properties?.
Answer:
C. It has no delocalised electrons and each carbon atom forms four covalent bonds with other carbon atoms.
Explanation:
Diamond is composed solely by carbon atoms. As the difference of electronegativity between atoms is 0, diamond is a fully covalent compound.The lack of electrical conductivity stems from a lack of available electrons, this means that there are no delocalised electrons.The information in the first point discards options A and D, while the second point discards option B. Thus the answer is option C.
Below are is a before and after particle diagram that shows the process of
condensation. Choose the statement below that best describes how the
particles changed in their arrangement during this process.
Attempt d
2 Minute
Before: Gas 100 C
After: Liquid 30 C
Answer:
It must first melt to become a liquid and then evaporate to become a gas
Explanation:
which of the following statements is true?
A. Displacement and distance traveled are always the same
B. Displacement and distance traveled are never the same.
C. Distance traveled is the direction of the displacement vector.
D. Displacement and distance traveled are the same if the direction does not change.
Answer:
D. Displacement and distance traveled are the same if the direction does not change.
Answer:
D
Explanation:
if a person in a single direction, then that person may travel certain distance and if the direction is not changed then its displecemengt remains same sa that person travelled distance.
give me a example of physical
pls
Answer:
An example of physical is plant life growing in the ground. An example of physical is someone confined to a wheelchair because of disabilities. Of, or produced by the forces of physics.
Explanation:
help please
........
I am pretty sure it is Vitamin A... but I could be wrong. Sorry if it is wrong.