Answer:
Because it is made of a hardened liquid that is extremely sensitive to heat
Explanation:
Brainliest?
Plz answer this. (No fake please)
Answer:
120 moles of Mg
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
3Mg + 2H₃PO₄ —> Mg₃(PO₄)₂ + 3H₂
From the balanced equation above,
3 moles of Mg reacted to produce 3 moles of H₂.
Finally, we shall determine the number of mole of Mg needed to produce 120 moles of H₂. This can be obtained as follow:
From the balanced equation above,
3 moles of Mg reacted to produce 3 moles of H₂.
Therefore, 120 moles of Mg will also react to produce 120 moles of H₂.
Thus, 120 moles of Mg is needed for the reaction.
WHICH OF THE FOLLOWING WOULD NOT BE AN EXAMPLE OF AN OBJECT ACCELERATING?
A the object goes faster
B the object travels at the same speed in the same direction
C the object goes slower
D the object travels at the same speed and changes direction
Essentially, the oxygen we breath is
A. Necessary for the light reactions to proceed
B. A waste product of photosynthesis
C. Essential for the homeostasis of the plant cell
D. A reactant of the Calvin cycle
Answer:
b
Explanation:
Plants need carbon dioxide and let out oxygen
ANSWER ASAP!
How does a combustion reaction form?
Answer:
A combustion reaction is when a fuel, usually a hydrocarbon, reacts with excess oxygen to form carbon dioxide gas and water vapor.
Explanation:
Yo sum help would be sick
Each shape in the chart represents a different type of atom. Atoms with a line (stick) between them show a chemical
bond. Cells A through D tell you whether or not a chemical bond occurs when the atoms combine.
Use the drawing tool to fill in cells A through D in the chart. Show what will happen when the atoms or molecules
combine. Use stick models as necessary.
Answer:
A
Explanation:
Answer:
see photo
Explanation:
PLATO answer
All of the following are examples of well known scientific laws except:
a. The law of physics
b. The Law of Conservation of Energy
c. The Law of Conservation of Momentum
d. The Laws of Motion
what element is classified as a noble gas?
Answer:
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation:
Name the Compound CS4
Monocarbon tetrasulfide
Monocarbon sulfide
Carbon tetrasulfide
Carbon sulfide
Answer:
Monocarbon tetrasulfide
Explanation:
Name of compound is mono carbon tetrasulfide.
What is a compound?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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which model of an atom is correctly labeled?
Answer:
B
DUH
The nucleus is made up of the protons (which have a positive charge) and neutrons and surrounded by a cloud of electrons ( which have a negative charge ).
6. Which statement is true about scientific debates?
O A. Debates are of no use in science because they do not use scientific evidence.
B. Debates always are able to resolve the problem.
O C. They are a chance for scientists to work out different points of view.
Answer:
C
Explanation:
that's really the only one that makes any sence
PLEASE ANSWER THIS FAST
Upper H Subscript 2 Baseline Upper S Upper O Subscript 4 Baseline (a q) double-headed arrow 2 Upper H Superscript + Baseline (a q) + Upper S Upper O Superscript 2 negative sign Subscript 4 Baseline (a q)
Which contain a common ion that will shift the equilibrium system represented by the equation shown? Select all that apply.
MgSO4
Na2S
HNO3
CaCl2
MgSO₄ and HNO₃ contain a common ion that will shift the equilibrium system. Therefore, option A, C is correct.
What is equilibrium?The equilibrium of a system can be defined as the state in which both the reactants and products in the chemical reactions are in concentrations that have not changed with time. The rates of reaction of the forward reactions and backward reactions are non-zero, but equal while in an equilibrium system.
By definition, a common ion can be described as an ion that enters the solution from two different sources. Solutions to which NaCl and AgCl are added also contain a common ion will be chloride Cl⁻ ion. The effect of common ions on solubility product equilibrium of the system.
The dissociation of sulphuric acid can be shown as:
H₂SO₄ → 2 H⁺ (aq) + SO₄²⁻ (aq)
MgSO₄ and H₂SO₄ have a common ion SO₄²⁻. H₂SO₄ and HNO₃ have a common ion H⁺ ion.
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Answer:
1. A, C
2. B- Equilibrium will sift to the left.
Explanation:
Which component is missing from the process of cellular respiration?
Answer:
Cellular respiration can be defined as the process in which cells convert sugar into energy
C₆H₁₂O₆ + 6O₂ -------------------> 6CO₂ + 6H₂O + ~38 ATP
Glucose + Oxygen → Carbon Dioxide + Water + Energy Sunlight Sugar Oxygen Carbon
Please help. I need someone smart
What is the formula and type (I, II, III) for this compound: Lithium acetate.
Which one of these is not a pathogen?
a. parasite
b. plant
c. protozoa
d. bacteria
How do you convert a temperature from Celsius to kelvin?
Explanation:
by adding 273.15K to the given value of temperature in Celsius degree.
example:
20℃ to Kelvin
[tex]T(K)=20℃+273.15K \\
=293.15K [/tex]
How many atoms are in 10 g of O
Answer:
Atomic mass O is 15.9994.
Molar mass of O2 =2 X 15.9994=31.99880 g/mole.
10 g X 1 mole/31.99880 g X 6.022 X 10^23 atoms/mole =
188194557295898596197357 atoms in 10 grams O2.
Explanation:
Someone already asked/answered
sodium carbonate is ........salt
False, they are two different things lol
Why are vitamins and minerals are not classified as a food?
Answer:
these micronutrients are not produced in our bodies and must be derived from the food we eat.
Explanation:
Vitamins and minerals are micronutrients required by the body to carry out a range of normal functions. However, these micronutrients are not produced in our bodies and must be derived from the food we eat. Vitamins are organic substances that are generally classified as either fat soluble or water soluble.
what has to happen when the domains in an object for it to become magnetic
Answer:
When all or most of the domains are aligned in the same direction, the whole object becomes magnetized in that direction and becomes a magnet. The process of using a magnetic field to magnetize another object is called induction.
Justifica cuál de las tres medidas siguientes es mejor. a) Una masa de 3 kg con un error absoluto de 1 g. b) Una masa de 4 g con un error absoluto de 1 mg. c) Una masa de 95 kg con un error absoluto de 1 kg.
Answer:
La mejor medida, con el error porcentual más pequeño de 0.025% es una masa de 4 g con un error absoluto de 1 mg
Explanation:
Tenemos el error porcentual dado como sigue;
[tex]El \ porcentaje \ error =\dfrac{\left | v_A - v_e \right |}{v_E} \times 100[/tex]
Dónde;
[tex]\left | v_A - v_e \right | = Error \, absoluto[/tex]
[tex]v_e[/tex] = El valor esperado
La mejor medida tiene el menor porcentaje de error;
a) Para una masa de 3 kg con un error absoluto de 1 g, tenemos;
El valor esperado, [tex]v_e[/tex] = 3 kg
Error absoluto = [tex]\left | v_A - v_e \right |[/tex] = 1 g = 0.001 kg
Que da el error porcentual = 0.001/3 × 100 = 0.0[tex]\bar 3[/tex]%
b) Una masa de 4 g con un error absoluto de 1 mg = 0,001 g
El valor esperado, [tex]v_e[/tex] = 4 g
Error absoluto= [tex]\left | v_A - v_e \right |[/tex] = 1 mg g = 0.001 g
El porcentaje de error = 0.001/4 × 100 = 0.025%
c) La masa medida dada = 95 kg
El error absoluto = 1 kg
El valor esperado, [tex]v_e[/tex] = 95 kg
Error absoluto = [tex]\left | v_A - v_e \right |[/tex] = 1 kg
El porcentaje de error = 1/95 × 100 ≈ 1.053%.
Por lo tanto, la mejor medida, con el menor porcentaje de error de 0.025% es una masa de 4 g con un error absoluto de 1 mg.
What is the reaction for CO2+ H2O= H2CO3
Use the reaction given below to solve the problem that follows: Calculate the mass in grams of aluminum oxide produced by the reaction of 15.0 g of aluminum metal.
[ ]grams Al2O3
4 Al + 3 O2 --> 2 Al2O3
**Your answer should be written as XX.X
Answer: 28.4 g of aluminum oxide is produced by the reaction of 15.0 g of aluminum metal
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} Al=\frac{15.0g}{27g/mol}=0.556moles[/tex]
The balanced chemical equuation is:
[tex]4Al+3O_2\rightarrow 2Al_2O_3[/tex]
According to stoichiometry :
4 moles of [tex]Al[/tex] produce == 2 moles of [tex]Al_2O_3[/tex]
Thus 0.556 moles of [tex]Al[/tex] will produce=[tex]\frac{2}{4}\times 0.556=0.278moles[/tex] of [tex]Al_2O_3[/tex]
Mass of [tex]Al_2O_3=moles\times {\text {Molar mass}}=0.278moles\times 102g/mol=28.4g[/tex]
Thus 28.4 g of aluminum oxide is produced by the reaction of 15.0 g of aluminum metal.
Within a group, does the radii of atoms increase or decrease as the atomic
number increases? Explain.
Answer:increase
Explanation: the more electrons there are the bigger the electron field is and the bigger the atomic radii is
Two knots is equal to:
Answer:
2.30156
Explanation:
Answer:
2.30156
Explanation:
becuase one knot is equivalent to 1.15078, two knots is equivalent to 2.30156
Which element provides strength to bones?
sulfur
phosphorus
nitrogen
hydrogen
Answer:
Phosphorus
Explanation:
Answer:
yup there right
Explanation: :))))
14.
How many grams of copper are in 4.6 moles of copper?
Answer:
292.1 kg = 292 100 g
Explanation:
n = m/Mm
Mm(Cu) = 63.5
m = n * Mm
m = 4.6 * 63.5
m = 292.1 kg
Which symbol equation correctly describes the reaction:
Wood (mostly glucose) burns in the presence of oxygen to form water and carbon dioxide?
A. C6H12O6+O2→H2O+CO2
B. O2→H2O+CO2+C6H12O6
C. C6H12O6→O2+H2O+CO2
D. O2+H2O→CO2+C6H12O6
Answer:a
Explanation:I think
[tex]C_6H_{12}O_6+O_2[/tex] → [tex]H_2O+CO_2[/tex] equation correctly describes the reaction. Hence, option A is correct.
What is glucose?Glucose is the main type of sugar in the blood and is the major source of energy for the body's cells.
Burning wood provides heat through the exothermic chemical reaction of oxygen (O) with cellulose ([tex]C_6H_{12}O_6[/tex]), the major chemical component of wood, to produce carbon dioxide ([tex]CO_2[/tex]), steam ([tex]H_2O[/tex]) and heat.
The chemical reaction describing the process is
[tex]C_6H_{12}O_6+O_2[/tex] → [tex]H_2O+CO_2[/tex] +heat
Hence, option A is correct.
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whats the name of the group 13 of the periodic table? 14 is cristalogens and 15 pnictogens and 16 chalcogens and 17 halogens and 18 rare noble gazes.. btw whats the name of the 13???
Answer:
Boron family.
Explanation:
Group 13 is called boron family.
It consist of five members boron, aluminum, gallium, indium and thallium.
Boron is semi metal while other members are metals.
Boron hydrates are used to make organic compounds.
Al is soft metal and aluminum oxides are widely used as thermal insulator.
Aluminum sulfate is also very important commercial compound used in sizing paper.
Gallium is also very important element of this group. It form gallium arsenide which is used to convert the light into electricity.
Indium is malleable soft metal which is used in optical instruments.
Thallium is highly toxic and for the long period of time it as used as insect killing poison.
Science test I need help for answers answer both
Answer:
The answer to the first question is C. Also im pretty sure the answer to the next problem is C as well
Explanation:
How can you use the VSEPR model to predict the shape of, and the bond angles in a molecule?
Answer:
the VSEPR model utilizes electron-pair geometry (regions around the central atom) and molecular geometry (amount of lone pairs around the central atom–so whatever the electron-pair geometry is, you just count the amount of lone pairs in those regions).
Explanation:
No lone pairs around the central atom, the electron pair and molecular geometry would be the same. Bond angle differs depending on the electron pair geometry and molecular geometry you have for a molecule.
The VSEPR model is used to predict the shape of, and the bond angles in a molecule by counting the number of electron pairs on the valence shell of the central atom in the molecule.
The VSEPR model was introduced by Gillespie and Nyholm in 1957 to explain the shape of and bond angles of molecules.
The main point of the theory is that electron pairs on the valence shell of the central atoms of molecules position themselves as far apart in space as possible to minimize electron pair repulsion.
The number of electron pairs on the valence shell of the central atoms of molecules determine the shape and bond angle of the molecule.
If for instance, there are four electron pairs on the valence shell of the central atom of a molecule, the molecule is expected to be tetrahedral in shape with a bond angle of 109°.
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