Classify each of the following as abiotic or biotic.
A. Sand
B. Grass
C. Air
D. Rabbits and deer
E. Humans
Answer:
D.Explanation:
#I'm not sure#happy learningHolding a marshmallow near a campfire flame causes it to turn brown even if the marshmallow does not touch the flame. Why does this happen?
A.
Dust blowing through the air causes the marshmallow to brown.
B.
Hot air in the atmosphere cooks the marshmallow.
C.
Heat radiates from the fire and cooks the marshmallow.
D.
Smoke and soot from the fire cause the marshmallow to brown.
Answer:
The answer is, C. Heat radiates from the fire and cooks the marshmallow.
Answer:
C Heat radiates from the fire and cooks the marshmallow.
Explanation:
Heat can be transferred through space through the process of radiation. The marshmallow is toasted because heat radiates from the fire and cooks the marshmallow.
What’s a conjugative Bas of OH-
Answer:
the answer is O²- hopefully
Which of the following elements has the lowest first ionizition energy ?
1 ) Li
2)Mg
3) Na
4) Al
Answer:
I think Mg is correct I am not sure
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chemical equations for sodium sulphate, potassium sulphate, magnesium sulphate, calcium sulphate
Explanation:
2NaOH + H2SO4 --> Na2SO4 + 2H2O
2KOH + H2SO4 --> K2SO4 + H2O
Mg(OH)2 + H2SO4 --> MgSO4 + 2H2O
Ca(OH)2 + H2SO4 --> CaSO4 + 2H2O
1. Describe what happens when two substances at different temperatures come into contact. Describe how the
law of conservation of energy applies to this system.
Answer:
Explanation:
When two substances at different temperatures like into contact, the substance that is at higher temperature will transfer energy, in the form of heat, to the substance that is at lower temperature, until their temperatures get equal.
In this case, if the two substances are isolated of the rest of the universe, the law of conservation of energy states that the heat released by the substance initially at higher temperature is the same amount of heat gained by the substance originally at lower temperature.
a. Law of conservation of matter
i. What does the law say about matter?
In Experiment 1, what volume did the propane gas occupy in the Erlenmeyer flask before the addition of any water?
This question is mentioning an experiment that is not being described about the volume of the propane gas in an Erlenmeyer before the addition of water.
In this case, since no information is given, it is possible to propose a suggested procedure of how to figure it out via gas laws, specifically, the ideal gas one, since no change is decribed before the addition of water:
[tex]PV=nRT[/tex]
Thus, you can solve for the volume, by dividing both sides by the pressure, so that you will get:
[tex]V=\frac{nRT}{P}[/tex]
Now, to ensure a correct calculation, make sure you have the moles (divide by the molar mass of propane, 44,1 g/mol, if you were given the grams), the temperature in K (add 273.15 if you have degree Celsius), the ideas gas constant as 0.08206 and the pressure in atm, in order to have consistent units.
If you need the volume in milliliters, you will need to multiply the previous answer by 1000 in order to perform the appropriate conversion.
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https://brainly.com/question/15268548https://brainly.com/question/16521007If the average speed of a car is 45 km/hr, how far can it travel in 0.5 hours
Answer:
22.5 Km
Explanation:
45km/hr * 0.5 hr = 22.5km
6.02 times 10 to the 23 atoms of an element have a mass in grams equivalent to the mass of how many of the atoms in amu?
Answer:
Relation between AMU and Gram
The mass of an atom in amu is numerically the same as the mass of one mole of atoms of the element in grams. One atom of sulfur has a mass of 32.07 amu; one mole of S atoms has a mass of 32.07 g. For compounds, the molecular mass (in amu) is numerically the same as the mass of one mole of the compound in grams.
Explanation:
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2. The mass number tells the total number of
nucleus of an atom. These particles collectively are called
both are located in the nucleus.
Answer: The mass number tells the number of protons.
Explanation:
What element is being reduced in the following redox reaction? Cr(OH)4-(aq) ClO-(aq) → CrO42-(aq) Cl-(aq).
The element that is being reduced in the given redox reaction is Cl (Chlorine)
The given redox reaction is
Cr(OH)₄⁻(aq) + ClO⁻(aq) → CrO₄²⁻(aq) + Cl⁻(aq)
First, we will define the terms oxidation and reduction
Oxidation can be defined as an increase in oxidation number
Reduction is defined as a decrease in oxidation number
This means the element that is being reduced in the reaction would have a decrease in oxidation number.
Oxidation number of Cr in Cr(OH)₄⁻ is +3; and the oxidation number of Cr in CrO₄²⁻ is +6. This is an increase in oxidation number and it means Cr is being oxidized.
Oxidation number of Cl in ClO⁻ is +1; and the oxidation number of Cl in Cl⁻ is -1. This is a decrease in oxidation number and it means Cl is being reduced.
Hence, the element that is being reduced in the given redox reaction is Cl (Chlorine).
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Why does in the golf stream warm and provide it’s Rhode Island or Bangor Maine
given the molecular clocks shown, you can conclude that reptiles and mammals should have approximately ______ amino acid differences between them in cytochrome c.
Answer:
The answer to your question is 15
Cómo se clasifica el aire?
Answer:
Not me
Explanation:
If a car is moved 10 meters and 3 Newton's of force is needed to move the car, what amount of workhas
been done?
Work required = 30J
This is because work = F * x
F (Newton's force) = 3N
x (car moved) = 10m
Work = 3 * 10 = 30J
Question 4 (1 point)
Model A
In the molecule above, the black circles are Carbon, the blue circles are Hydrogen
and the red circles are Oxygen. Which formula below is correct for this molecule?
C4H404
C2H402
Answer:
C2H4O2
Explanation:
Jus took USA Test prep test
Does molasses need to be refrigerated after opening?
Which action reflects irresponsible lab safety behavior?
Compare the box on the left containing the reactants in a chemical reactions. Which box on the right is the correctly represents the products according to the Law of Conservation of mass?
A) A.
B) B.
C) C.
D) D.
Answer:
d is the right answer
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how would you distinguish a simple microscope from a compound one
Answer:
A simple microscope employs a concave mirror. A compound microscope employs a plane mirror at one side and a concave mirror at the other. It contains only one adjustment screw to move the limb up and down for focusing on the object.
Answer:
D po
Explanation:
Sana nakatutulong
#Carry on learning
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Matt is conducting an experiment where he compares the properties of water and
lemonade. The first stage of the experiment is focusing only on the physical properties of?
Answer:
sitric acid from lemon
Explanation:
there
The first stage of the experiment is focusing only on the physical properties of acidic property.
What is physical property?A physical property would be any quantifiable attribute whose value describes the condition of a physical system. Changes in a system's physical attributes are able to characterize its transitions between brief states. Physical attributes are sometimes known as observables.
Physical characteristics are frequently classified as intense or extensive. An intense property is independent of the system's size or extent, as well as the amount of material in the item, whereas an extended property has an additive link. The first stage of the experiment is focusing only on the physical properties of acidic property.
Therefore, the first stage of the experiment is focusing only on the physical properties of acidic property.
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what happens when phosphorus forms an ion?
Answer:
Phosphorus would form a -3 charge
Explanation:
Phosphorus has five outer electrons that can bind atoms. As a result, Phosphorus forms a ion has a charge of -3.
The electron configuration 1s2 2s2 2p6 3s2 3p6 4s1 3d10 describes the electron configuration of what neutral element?
Answer:
Copper
Explanation:
Copper has this electronic configuration.
You can count the total number of electrons
= 29
Cu is the 29 th in the periodic table.( atomic number = 29)
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the given electronic configuration represents copper element.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
The systematic distribution of electrons in the various atomic orbitals is called its electronic configuration. The atomic number of copper is 29. The electronic configuration of copper is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰. 1,2,3 represents the number of shells and s and represents the orbitals. The superscripts represents the number of electrons in each orbitals.
Therefore, the given electronic configuration represents copper element.
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what is the accepted iupac name for the compound mg3p2?
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the IUPAC name of the Mg[tex]_3[/tex]P[tex]_2[/tex] is Tri magnesium Di phosphide.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond. The IUPAC name of the Mg[tex]_3[/tex]P[tex]_2[/tex] is Tri magnesium Di phosphide. The oxidation state of phosphide is -3.
Therefore, the IUPAC name of the Mg[tex]_3[/tex]P[tex]_2[/tex] is Tri magnesium Di phosphide.
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Compound Y dissolves in ethanol but not water what type of bond is Y ?
Covalent Bond.
Explanation: Covalent compound are soluble in organic solvents (non polar) but insoluble in water (polar).
Ethanol being both polar and non polar can dissolve covalent compound.
How do I convert 50 years into seconds. Express your answer in scientific notation?
Answer: 15768 seconds
Explanation: (50 years) x (365 da/yr) x (86,400 sec/da)
= (50 x 365 x 86,400) seconds
= 1.5768 x 10⁹ seconds
What will the final temperature of the a block of brass with a mass of 30.6 g is at 87.4°C
after it's added to 62.3 g of water at 28.3°C. The specific heat of aluminum is 0.380
J/gºC.
The final temperature of the block of brass with a mass of 30.6 g at 87.4°C is 30.82°C.
SPECIFIC HEAT CAPACITY:
The amount of heat absorbed or released by a substance can be calculated using the following formula:Q = m × c × ∆TQ(water) = - Q(metal)(m × c × ∆T) water = - (m × c × ∆T) metalAccording to this question;
METAL:
m = 30.6gc = 0.380 J/g°C∆T = T - 87.4°CWATER:
m = 62.3gc = 4.184J/g°C∆T = T - 28.3°C62.3 × 4.184 × (T - 28.3) = - {30.6 × 0.380 × (T - 87.4)}260.7T - 7376.8 = - {11.63T - 1016.3}260.7T - 7376.8 = -11.63T + 1016.3260.7T + 11.63T = 1016.3 + 7376.8272.33T = 8393.1T = 8393.1 ÷ 272.33T = 30.82°CTherefore, the final temperature of the block of brass with a mass of 30.6 g at 87.4°C is 30.82°C.Learn more at: https://brainly.com/question/11194034?referrer=searchResults
Why do we fill balloons
with helium gas instead
of oxygen gas?
Answer:
Helium is less dense. Because helium is lighter than air, a helium balloon rises, just as an air bubble rises in more dense water
Explanation:
Also why not. It just is.
Answer:
This is due to the fact that helium has a lower density. A helium balloon rises like an air bubble in more dense water because helium is lighter than air. Another gas lighter than air is hydrogen, which is even lighter than helium.
Explanation:
A chemist has dissolved a certain substance in water. The chemist knows that more of the substance could be dissolved into the water before it stops dissolving. Therefore, the current solution is
.
Answer is: the current solution is unsaturated.
Unsaturated solution means that more of a substance can be dissolve.
For example:
Solubility of potassium chlorate (KClO₃) at 100 grams of water at 80°C is 37.5 g, that means that all 37.5 g is completely dissolves, this is the saturated solution.
If we add 20 grams of potassium chlorate in 100 grams of water, there is less solute than the saturated solution, so this is unsaturated solution.