HELP! ASAP!!! WILL MARK BRAINLIEST!!
Which of the following compounds in the main group is an alkali metal? Question 7 options: Beryllium (Be) Rubidium (Rb) Hydrogen (H) Strontium (Sr)
Answer:
Rb
Alkali Metals are Group 1 so
Rb it isnt Hydrogen because it is a gas
Explanation:
What will most likely happen to the action of an enzyme from the small intestine if it is placed in
an environment similar to the environment in which enzyme C functions best?
Answer:
It would be able to function because the ph of the environment is similar to that of intestine.
Explanation:
The pH of the small intestine is eight. The enzyme would be able to function because enzyme C functions best at a Ph range around 8.
Water weathers rock and minerals by ___________________ them.
melting
dissolving
burning
ablating
Answer:
Dissolving?
Explanation:
Answer:
B. Dissovling
Explanation:
Im a smart boy G.
What actions can you take to reduce your impact on science?
Answer:
Don't travel by air if you can avoid it because air travel uses up large amounts of fossil fuels and creates greenhouse gases. Dispose of any rubbish responsibly - it can be hazardous to wildlife. Use public transport, cycle or walk instead of using a car. Use facilities and trips run by local people whenever possible.
Answer:
Practicing recycling and green computing
2. How would a small change in the Sun's radiation affect our
ecosystems?
Answer: It could burn or freeze anything
Explanation:
Answer:
The carcinogen (U.V.) helps to stabilize the formation of clouds and maintain life in ecosystem.
If drastic changes were made to the radiation of sun, it will lead to ecological imbalance such as changes in O3 layer, etc and surely, the last day (D-day, what we majorly call) will come!
Help please I’ll give you brain list
Answer:
A
Explanation:
14. What is the total number of kilojoules of heat needed to change 150. G of
ice to water at 0°C?
Answer:
[tex]\boxed {\boxed {\sf 50.1 \ kJ}}[/tex]
Explanation:
When water changes from ice (solid) to water (liquid), it is melting or fusion. Therefore, we can use the following formula to find energy:
[tex]q=mH_f[/tex]
where q is the energy, m is the mass, and Hf is the heat of fusion.
1. Define Values
The mass is 150 grams. The heat of fusion for water is 334 Joules per gram.
[tex]m= 150 \ g \\H_f=334 \ J/g[/tex]
2. Calculate Energy
Substitute the values into the formula.
[tex]q=150 \ g * 334 \ J/g[/tex]
Multiply. Note that the grams (g) will cancel each other out and leave Joules as our units.
[tex]q=150 *334 \ J[/tex]
[tex]q=50100 \ J[/tex]
3. Convert Units
We found the answer in joules, but the question asks for kilojoules, so we must convert.
There are 1000 Joules in 1 kilojoule. Therefore, we can divide the joules calculated by 1000.
[tex]50100 \ J *\frac{1 \ kJ}{1000 \ J}[/tex]
[tex]\frac{50100 \ kJ}{1000 \ }[/tex]
[tex]50.1 \ kJ[/tex]
50.1 kilojoules are needed to change 150 grams of ice to water.
____________________________ the cell organelle where cellular respiration occurs.
Answer:
Mitochondrion is the cell organelle where cellular respiration occurs.
Hope it helps ^^
Answer:
Mitochondria
I hope this helps!
Question 8 of 10
What will happen when a reactant is added to a system at equilibrium?
A. The system will remain at equilibrium.
B. Only the concentration of that reactant will change.
C. More reactants will form.
D. The equilibrium of the system will be upset.
SUBMIT
the equilibrium of the system will be upset
Explanation:
PLEASE HELP I'LL GIVE YOU BRAINLIEST!!
What is a compound?
A. the center of an atom that is formed by neutrons, protons, and electrons
B. a tiny particle that makes up all matter
C. a molecule that is formed from two or more different types of atoms.
D. a molecule that is formed from the same type of atoms
Answer:
C
Explanation:
Guys please help me this is for a final
What happens when you change only the number of electrons inside of an atom
Answer: Changing the number of electrons will change the overall charge on an atom.
Explanation:
An atom that loses electrons will become positively charged and an atom with added electrons will become negatively charged. ... A charged atom is called an ion.
Please Help Me Balance The equation!! will mark brainliest
Answer: XCl2(aq) + 2 AgNO3(aq) ---> X(NO3)2(aq) + 2 AgCl(s)
Explanation:
Hehe I remembered how...
PLZ HELP! THIS IS DUE IN A FEW MINS!
What would happen to work and power if the mass of the person walking was increased or decreased? EXPLAIN.
Answer:
work and power increases or decreases opposite of the mass
Explanation:
This Is beacuse Work is the product of Mass, Gravity, and Height
If u wanted to measure an irregular object volume which of the following device’s could u see
What's the Henry's law formula for gas concentration?
Don't help me
Ima fine.k!!!!!!!!
Answer:
ok!
Explanation:
Why does the half-life of cancer treatment decay?
Answer:
The decay of radioactive elements occurs at a fixed rate. The half-life of a radioisotope is the time required for one half of the amount of unstable material to degrade into a more stable material. For example, a source will have an intensity of 100% when new. At one half-life, its intensity will be cut into 50% of the original intensity.
Explanation:
Determine whether each melting point observation corresponds to a pure sample of a single compound or to an impure sample with multiple compounds.
The question is incomplete, the complete question is;
Determine whether each melting point observation corresponds to a pure sample of a single compound or to an impure sample with multiple compounds.
Experimental melting point is BELOW literature value
Experimental melting point is CLOSE to literature value
WIDE melting point range
NARROW melting point range
Answer:
narrow melting point-pure sample of a single compound
experimental melting point is close to literature value-pure sample of a single compound
wide melting point range-impure sample of multiple compounds
experimental melting point is below literature value-impure sample of multiple compounds
Explanation:
The experimental melting point of a pure single compound is sharp and extremely close to the melting point of the substance as recorded in the literature. Usually, a pure substance melts within a narrow range of temperatures.
Impure samples of multiple compounds melt over a range of temperatures. Also if the experimental melting point is well below the record in literature, then the sample is contaminated by other compounds.
Mention any two variables of Ideal Gas law
Answer:
Pressure (P) , Volume (V) , Temperature (T)
Explanation:
An ideal gas has three variables that define its state. They are: absolute pressure (P), volume (V), and absolute temperature (T). The ideal gas law defines how these state variables relate to each other
-------HOPE IT HELPS---------
What is the resultant pressure if 1.7 mol of ideal gas at 273 K and 2.79 atm in a closed container of constant volume is heated to 315 K? Answer in units of atm.
Answer: The resultant pressure is 3.22 atm
Explanation:
Gay-Lussac's Law: This law states that pressure is directly proportional to the temperature of the gas at constant volume and number of moles.
[tex]P\propto T[/tex] (At constant volume and number of moles)
[tex]\frac{P_1}{T_1}=\frac{P_2}{T_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 2.79 atm
[tex]P_2[/tex] = final pressure of gas = ?
[tex]T_1[/tex] = initial temperature of gas = 273K
[tex]T_2[/tex] = final temperature of gas = 315 K
[tex]\frac{2.79}{273}=\frac{P_2}{315}[/tex]
[tex]P_2=3.22atm[/tex]
Thus the resultant pressure is 3.22 atm
7. What is the name of: CH3-CH(CH3)-CH2- alky group? *
isopropyl
propyl
sec-butyl
butyl
Answer:
propyl
1-propylmethane or 2-methylpropane
Which type of reaction is C1pHO11 12C + 11H,0?
O synthesis
O decomposition
O oxidation
O combustion
Answer:
C. oxidation ..........
The given reaction is the breaking of the carbohydrate C₁₂H₂₂O₁₁ into 12 C and 11 H₂O. Hence, it is a decomposition reaction .
What is decomposition reaction ?A decomposition reaction is a type of chemical reaction in which a compound breaks down into two or more simpler substances, either through heat, light, or an electrical current.
In a decomposition reaction, a single reactant is converted into two or more products, which can be elements or compounds.
The general equation for a decomposition reaction can be written as:
AB → A + B
where AB is the reactant and A and B are the products.
Decomposition reactions are important in many chemical processes, such as the breakdown of organic matter in soil, the production of industrial chemicals, and the functioning of biological systems.
The given reaction is the decomposition of C₁₂H₂₂O₁₁ into 12 C and 11 H₂O.
Find more on decomposition reactions:
https://brainly.com/question/16987748
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Your complete question is follows:
C₁₂H₂₂O₁₁ ⇒ 11 H₂O + 12 C
Which type of reaction is
O synthesis
O decomposition
O oxidation
O combustion
In the product 6O2, what does the coefficient mean?
Answers:
There are 12 molecules of O2,
There are 8 molecules of O2,
There are 6 molecules of O2.
There are 2 molecules of O2.
Answer:
(A) there are 12
Explanation:
bc
hypothesize why carbohydrates are found in plant cell walls
Answer:
Plants can split starch into it's simpler glucose units for use as energy when needed. Cellulose is known as a structural carbohydrate because of the fibers formed by it's molecules. It is the major component of plant cell walls and comprises over half of the carbon found on planets.
Explanation:
I majored in Chemistry
I JUST NEED HELP!!! ASAP!!1 PLEASE!!!
Which fundamental principle from chemistry states different samples of the same substance contain elements in the same proportions?
Question 15 options:
A)
Law of simple multiple proportions
B)
Plum-pudding model
C)
Law of constant composition
D)
Bohr model
Answer:
I believe its A) Law of simple multiple proportions
Explanation:
The law of definite proportions states that a given chemical compound always contains the same elements in the exact same proportions by mass.
Answer:
A) Law of simple multiple proportions
Explanation:
What is removed in the sedimentation process
suspended solids from water
What does bananas batteries and people have in common
What is the electron configuration of a sulfur atom in the ground state?
Answer:
1s²2s²p⁶3s²p⁴
Explanation:
An atom that is in the ground state has not lost or gained electrons. If we look at the Periodic Table, we can see that the electron configuration of the sulfur atom (S) is [Ne]3s²p⁴. Since the electron configuration of Ne is 1s²2s²p⁶, the complete electron configuration is 1s²2s²p⁶3s²p⁴.
A reaction involved in the production of iron from iron ore is:
Fe2O3(s)
CO (g)
Fe (s)
CO2
a) How many kilograms of CO must react to produce 3.50 kg of Fe?
b) What mass of CO, would be produced?
Answer:
a) 2.632 kg
b) 41.36 kg
Explanation:
Given data:
Mass of CO react = ?
Mass of Fe formed = 3.50 Kg (3.50 /1000 =3500 g)
Mass of CO₂ formed = ?
Solution:
Chemical equation;
Fe₂O₃ + 3CO → 2Fe + 3CO₂
Number of moles of Fe:
Number of moles = mass/molar mass
Number of moles = 3500 g/55.85 g/mol
Number of moles = 62.67 mol
now we will compare the moles of iron with CO.
Fe : CO
2 : 3
62.67 : 3/2×62.67 = 94 mol
Mass of CO:
Mass = number of moles × molar mass
Mass = 94 mol × 28 g/mol
Mass = 2632 g
In kilogram:
2632g × 1 Kg /1000 g
2.632 kg
Now we will compare the moles of Fe with CO₂
Fe : CO₂
2 : 3
62.67 : 3/2×62.67 = 94 mol
Mass of CO₂:
Mass = number of moles × molar mass
Mass = 94 mol × 44 g/mol
Mass = 4136 g
In kilogram:
4136g × 1 Kg /1000 g
41.36 kg
What is the formula for the compound formed by a magnesium cation (Mg2+) and a fluoride anion (F- )?
Answer:
MgF₂
Explanation:
Fluorine only has a 1- charge, so to satisfy the 2+ charge on magnesium–– you need 2 fluorine atoms to balance out the charges.