Answer:
E
Explanation:
took the test
What is the correct name for the following compound: P2Br5
Answer:
Diphosphorus pentabromide is the official name.
Explanation:
Which things are larger than cells? Put an X next to (or highlight) the things that are generally larger than a typical animal or plant cell.
_____thickness of a leaf ____grain of salt
_____atom _____protein molecule
_____width of hair x DNA
_____piece of sawdust _____eye of an ant
_____Water molecule _____tiny seed
_____bread crumb _____larva of a tiny fruit fly
_____bacteria _____period at end of sentence _____ virus
_____speck of pepper _____chromosome _____ frog embryo _____dust mite _____point of a pin _____ flea egg
Answer:
Explanation:
x thickness of a leaf x grain of salt
_____atom _____protein molecule
x width of hair x DNA
x piece of sawdust x eye of an ant
_____Water molecule x tiny seed
x bread crumb x larva of a tiny fruit fly
x bacteria x period at end of sentence _____ virus
x speck of pepper _____chromosome x frog embryo x dust mite xpoint of a pin x flea egg
Describe the motion of particles in a substance as thermal energy is added
Answer: it moves faster
Explanation:
When heat is added it gains thermal energy therefore it moves faster as things heat up and it loses thermal energy when it gets cooler causing particles to move slower
what is the electical charge on the nucleus of the boron atom ?
whats the balanced chemical equation for the standard formation reaction of solid glucose, where everything can only have 1 mole with physical states.
Answer:
6C(s) + 6H2(g) + 3O2(g) --------------------> C6H12O6(s).
Explanation:
One of the examples under the type of sugar; monosaccharide(simple sugar) is the glucose. Glucose(with IUPAC name as D-glucose) as a monosaccharide (simple sugar) has the molar mass of 180.156 g/mol and a Melting point of 146 °C.
Thus, the unbalanced chemical reaction for the formation of glucose is given below;
C(s) + H2(g) + O2(g) --------------------------> C6H12O6(s) ΔH°f = -1273.1KJ/mol.
The balanced chemical reaction for the formation of one mole of glucose is given as;
6C(s) + 6H2(g) + 3O2(g) --------------------> C6H12O6(s).
The balanced chemical equation for the standard formation reaction of solid glucose is: [tex]\mathbf{6C_{(s)} + 6H_{2(g)} +3O_2_{(g)} \to C_6H_{12}O_{6} _{(s)} \ \ \ }[/tex]
Glucose is a simple sugar of a class of carbohydrates known as monosaccharides. It is the principal metabolite for energy production in the human body.
The formation of solid glucose [tex]\mathbf{C_6 H_{12} O_6_{(s)}}[/tex] occurs by the reaction of carbon, hydrogen, and oxygen.
The reaction formation of the solid glucose is:
[tex]\mathbf{C_{(s)} + H_{2(g)} +O_2_{(g)} \to C_6H_{12}O_{6} _{(s)} \ \ \ \Delta H_f^0= -1273.1 \ kJ/mol}[/tex]
Now, the balanced chemical equation can be expressed as follows;
[tex]\mathbf{6C_{(s)} + 6H_{2(g)} +3O_2_{(g)} \to C_6H_{12}O_{6} _{(s)} \ \ \ }[/tex]
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On the periodic table of elements, all the elements within group 14 have the same number of
Group 14 is the carbon family. The five members are carbon, silicon, germanium, tin, and lead. All of these elements have four electrons in their outermost energy level. Of the Group 14 elements, only carbon and silicon form bonds as nonmetals (sharing electrons covalently).
Describe a method to calculate the average atomic mass of using only the atomic masses of
lithium-6=6.01512amu
and lithium-7= 7.01600amu
Answer:
Average amu is 6.52556
Explanation:
Average the numbers
Add the two masses together.
6.01512+ 7.01600= 13.03112
Then divide by 2, we divide by 2 because that is how many #'s we are given.
13.03112/ 2= 6.52556
Which of the following correctly shows the flow of energy in a food chain
The direction of energy flow in simple food chain is always sun=> plants( producers)=> primary consumers=> secondary consumers=> tertiary consumers, than finally after death of an organism, to decomposers
The direction of energy flow in simple food chain is always sun=> plants( producers)=> primary consumers=> secondary consumers=> tertiary consumers.
What is food chain?The sequence of events within an ecosystem known as a "food chain" occurs when one live organism eats a different organism, which is then eaten by a larger organism. A food chain is created by the transfer of energy as well as nutrients from one creature to another at various trophic levels. A food web is comprised of numerous linked food chains.
The feeding habits or connections between living things are also explained by the food chain. Trophic level is the term used to describe the orderly phases in a food chain, from producers from the bottom through primary, secondary, and tertiary consumers. A trophic level is any position along a food chain. A food web and a food chain are similar, but a food web seems far bigger. The direction of energy flow in simple food chain is always sun=> plants( producers)=> primary consumers=> secondary consumers=> tertiary consumers.
Therefore, the direction of energy flow in simple food chain is always sun=> plants( producers)=> primary consumers=> secondary consumers=> tertiary consumers.
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Choose the balanced chemical equation below that best represents the following reaction:
When baking soda (NaHCO3) reacts with hydrochloric acid (HCl), carbon dioxide bubbles (CO2) are created, along with water (H2O) and sodium chloride (NaCl).
NaCl + H2O → NaHCO3 +CO2 + HCl
CO2 +H2O + NaCl → NaHCO3 + HCl
NaHCO3 + HCl → CO2 + H2O + NaCl
HCl + NaCl + H2O → NaHCO3 +CO2
The balanced chemical equation :
NaHCO₃ + HCl → CO₂ + H₂O + NaCl
Further explanationA balanced chemical reaction shows that the number of atoms of the reactant and the number of atoms of the product is the same
When baking soda (NaHCO3) reacts with hydrochloric acid (HCl), carbon dioxide bubbles (CO2) are created, along with water (H2O) and sodium chloride (NaCl) .
This statement shows that
Reactants (located to the left of the reaction)
Baking soda (NaHCO₃) and Hydrochloric acid (HCl)
product (located to the right of the reaction)
Carbon dioxide(CO₂),water (H₂O) and Sodium chloride (NaCl).
So the reaction :
NaHCO₃ + HCl → CO₂ + H₂O + NaCl
Which compound in the picture has a central atom with four outside atoms and has at least one nonpolar bond.?
Answer:
The correct answer is option B, that is, methane.
Explanation:
In the given question, the compound in option B is methane. It is a compound that exhibits two elements, that is, hydrogen and carbon. It possesses a central atom, which is encircled by four atoms of hydrogen. The chemical formula for the compound is CH4.
The outer atoms in methane are dipoles and exhibits in the same orientation. This property of methane makes it completely a non-polar molecule. The compound itself is non-polar and exhibits non-polar bonds.
When is electrolysis used to extract metal?
Answer:
Explanation:
electrolysis is the technique that use direct current to drive a non spontaneous chemical reaction chemical reaction is the gain or lose of electron this technique is use to extract metal from theirs ores
which description of salt is a chemical property?
No combustion
Odourless
salty taste
solid does not conduct electricity
Answer: No combustion
Explanation:
How are convalent molecules named?
Covalent compounds are named by using numerical prefixes to identify the number of atoms in the molecule. E.g. Mono, Di, tri, tetra, etc.
In the naming, never use mono- for the first element.
The first element keeps its name.
The second element always end in the suffix -ide.
Drop the double vowel for the prefix and the element of the second element in the compound.
Hope this helped!
What information can a foliated metamorphic rock provide you about the conditions under which it formed?
What is the frequency for a wave with a wavelength of 6.3x10^5
Answer:630000x
Explanation:
6.3x×100000
1 point
What would 140000000.0 be in scientific notation?
a. 1.4 x10-8
b. 1.4 x108
c. 14 x10-7
d. 14 x107
Answer:
B
Explanation:
you're moving the decimal 8 spots to the left so it can only be B
A gas is produced when 25 g of substance X is mixed into 60 g of solution Z in a beaker. The mass of the solution in the beaker after the reaction is 75 g. What is the mass of the gas released?
(X + Z -> gas + solution)
mass of the gas = 10 g
Further explanationThe law of conservation of mass :
In a closed / isolated system, the total mass of the substance before the reaction will be equal to the total mass of the reaction product.
Reaction
[tex]\tt X+Z\rightarrow gas+solution[/tex]
mass before reaction=mass after reaction
[tex]\tt 25+60=gas+75\\\\gas=25+60-75=10~g[/tex]
Suggest a change of state, other than ice melting, that is an endothermic
process.
Answer:
Vaporization and Sublimation
Explanation:
Answer:
Well there's solid states, liquid states, and gas states in matter.
What kind of reaction is 2H202
>
2H20 + O2?
Answer: Disproportionation reaction
Explanation: A reaction where a compound undergoes oxidation as well as reduction. 2H2O2=2H2O + O2 here hydrogen peroxide is oxidized to oxygen and is reduced to water.
Answer: B (Decomposition)
Explanation: A P E X X X
pls I need help give away 11 points
A particle has a nucleus that contains 10 protons and around the outside it has 8 electrons. What is the overall charge of the particle?
0
+2
-2
+18
Answer:
The charge is +2
Explanation:
Protons are positive, electrons are negative. 10-8=2.
+2 :)
A particle has a nucleus that contains 10 protons and around the outside it has 8 electrons, the overall charge of the particle is +2. Therefore, the correct option is option B.
What is atom?The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. As a result, the atom serves as the fundamental unit of chemistry.
Space makes up the majority of an atom. The remainder is made up of a cloud of electrons with negative charges around a positive-charged nucleus made up of protons and neutrons. Compared to electrons, that are the lightest positive ions in nature, the nucleus is tiny and dense. A particle has a nucleus that contains 10 protons and around the outside it has 8 electrons, the overall charge of the particle is +2.
Therefore, the correct option is option B.
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The “rise” of the muffin is caused by the release of ___________ gas trapped in the mix as it is heated. carbon dioxide hydrogen oxygen helium
Answer:
Carbon dioxide
Explanation:
In the making of the muffins, there are many ingredients are used including flour, egg, butter, sugar, and flavoring of fruits. There is also a raising agent, the baking powder or baking soda used that reacts with the batter.
This reaction form bubbles of carbon dioxide, trapped in the air spaces during the baking and muffin raises. Carbon dioxide makes muffins light, by lifting the batter as it bakes.
How many molecules are there in 8.25 moles of CaHia?
The number of molecules : 4.967 x 10²⁴
Further explanationA mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
8.25 moles of C₈H₁₈
The number of molecules :
[tex]\tt 8.25\times 6.02\times 10^{23}=4.967\times 10^{24}[/tex]
Calculate the speed for a car that went a distance of 150 kilometers in 2 hours time. btw this is science
Answer:
The speed of the car is 75 km per hour
Explanation:
Speed is distance over time so 150 km divided by 2 hours is 75km per hour.
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Brass and bronze are both of copper because copper is the component in brass and bronze.
Answer:1 alloys 2 main
Explanation: Brass and bronze are both constructed from copper because copper is the main component in brass
The chemical name for common salt is
Sodium chloride
commonly known as salt, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions. With molar masses of 22.99 and 35.45 g/mol respectively, 100 g of NaCl contains 39.34 g Na and 60.66 g Cl.
Answer:
Sodium chloride
Explanation:
that is the name and the formula is
NaCl
Describe a gentle force?
Answer:
The word gentle traces back to the Latin word gentlis, meaning “of the same clan,” and at first the world was used to describe people belonging to distinguished families, who were seen as courteous and noble. Nowadays you’re more likely to hear the word used to refer to things that are calm, moderate, and without harshness. The word is often applied to people, but it can be used more broadly to describe anything that is mild, such as "a gentle detergent" or "a gentle reminder."
AS HEIGHT INCREASES SO DOES
Answer:
potential energy (im positive that its right)
Describe how the molecular models you assembled are similar to real molecules.
They model how real molecules are.
Answer:
Atoms models are bigger but they don not match the true or positive way of atoms. to make them visible scientists make their models that resembled with the real ones.
Explanation:
Molecules are microscopic entities and only can be seen under a microscope.
3. What crime had James Kater been convicted of in 1969?
A. Sexual assault of a 15-year-old girl.
B. Theft of a 1976 Opel model green car.
C. Abduction and assault of a 13-year-old girl,
D. Second degree murder of a 18 year-old female.
During free fall which object would have a greater acceleration, an object with a mass of 240 kg or an object with a mass of 10 kg? Explain your answer.
Answer:
Leroy Jeakins
Explanation:
Catus jack f me in the asss