Answer:
because dark colors attract heat so if your clothes are light you won't be as hot as if you were wearing dark colors.
Answer:
bc dark colored clothing attracts heat
Many enzymes are inhibited irreversibly by heavy metal ions such as Hg2+ , Cu2+ , or Ag+ , which can react with essential sulfhydryl groups to form mercaptides. Enz−SH+Ag+⟶Enz−S−Ag+H+ The affinity of Ag+ for sulfhydryl groups is so great that Ag+ can be used to titrate −SH groups quantitatively. To 10.0 mL of a solution containing 3.4 mg/mL of a pure enzyme, an investigator added just enough AgNO3 to completely inactivate the enzyme. A total of 0.134 μmol AgNO3 was required. Calculate the minimum molecular weight (????r) of the enzyme.
Answer:
Explanation:
one mole of AgNO₃ reacts to inactivate one mole of enzyme
mg of enzyme in 10 mL = 3.4 x 10 mg = 34 mg .
required AgNO₃ = .134 x 10⁻⁶ mole
.134 x 10⁻⁶ mole AgNO₃ is required for inactivating 34 mg of enzyme
1 mole of AgNO₃ will be required for inactivating 34 / (.134 x 10⁻⁶ ) mg of enzyme
= 253.73 x 10⁶ mg of enzyme
= 253.73 x 10³ g of enzyme
Mol weight of enzyme = 253.73 x 10³ .
How many dots would be drawn for the Lewis Dot Structure of gallium?
Answer:
To draw a Lewis dot structure for an atom, you must know how many valence electrons an atom possesses. The periodic table organizes the elements based on the similarity of their chemical properties.
Explanation:
If 700 g of water at 90 °C loses 27 kJ of heat, what is its final temperature?
Answer:
If 700 g of water at 90 °C loses 27 kJ of heat, its final temperature is 106.125 °C
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
In this way, between heat and temperature there is a direct proportional relationship (Two magnitudes are directly proportional when there is a constant so that when one of the magnitudes increases, the other also increases; and the same happens when either of the two decreases .). The constant of proportionality depends on the substance that constitutes the body and its mass, and is the product of the specific heat and the mass of the body. So, the equation that allows to calculate heat exchanges is:
Q = c * m * ΔT
Where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT is the variation in temperature, ΔT= Tfinal - Tinitial
In this case:
Q= 27 kJ= 27,000 J (being 1 kJ=1,000 J)[tex]c=4.186 \frac{J}{g* C}[/tex]m=700 gΔT= Tfinal - Tinitial= Tfinal - 90 °CReplacing:
[tex]27,000 J=4.186 \frac{J}{g* C}*400 g* (Tfinal - 90C)\\[/tex]
Solving:
[tex]27,000 J=1,674.4 \frac{J}{C}* (Tfinal - 90C)[/tex]
[tex]\frac{27,000 J}{1,674.4 \frac{J}{C}} =(Tfinal - 90C)[/tex]
16.125 °C= Tfinal - 90 °C
Tfinal= 16.125 °C + 90 °C
Tfinal= 106.125 °C
If 700 g of water at 90 °C loses 27 kJ of heat, its final temperature is 106.125 °C
What is made when sugar is dissolved in water?
Answer:
When you stir a spoonful of sugar into a glass of water, you are forming a solution.
a. Why don't the lost atoms come back? los
I
Answer: Rubbing
Explanation: The lost atoms never come back because after rubbing, the molecules are shaking back and forth faster than they were billions of atoms. When molecules break apart or come together, that's called a nitrogen and oxygen molecules are lost this way too, but since their average velocity is so simplicity , that is missed by people who don't study physics.
Does each element have a specific number of valence electrons? How can you figure out how many valence electrons an element's atoms have?
Answer:
Detail is given below.
Explanation:
Each element have a specific number of valence electron. We can easily find out the number of valence electron in an atom through electronic configuration. The electrons reside in outer orbital are called valence electrons. It is also equal to the main group number of that element. Consider the example,
Sodium is present in group one thus it has 1 valence electron.
Electronic configuration of sodium:
Na₁₁ = 1s² 2s² 2p⁶ 3s¹
Let consider the example of halogens they are present in group 7A thus they have seven valence electrons.
Electronic configuration of fluorine:
F₉ = 1s² 2s² 2p⁵
The outer orbital contain seven electrons thus these are valance electron.
Copper is present in group 2B thus it must have two valence electrons.
Let check this from electronic configuration.
Cu₂₉ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁹
The outer most orbital is 4s² and it has two electron thus number of valence electron in copper are 2.
Easy Questions for points: Aluminum is a -
Metal
Nonmetal
Metalloid
Answer:
a
Explanation:
aluminum is a metal
One of your test tubes falls over and breaks during a lab. Describe how you would handle this situation?
Answer:
You would inform your teacher but don't take any safety equipment off
Explanation:
don't try to clean it yourself, tell a teacher immediately
(i put it in the wrong section)
what happens to the speed and acceleration when you let go
Answer:
the speed will increase and so will the acceleration. then after a bit the acceleration will decrease due to air resistance until there is no acceleration. Then the speed will continue to decrease when there is no acceleration anymore.
what property of material does salt possess
Answer:
in solid form salt form
Plz help!
What is 1 item that is an element?
Give an example of how the 1 item is an element.
Answer:
Carbon. This item is an element because it is on the periodic table.
Explanation:
Anything on the periodic table is an element.
what is the position of point X
Answer:
uh... where? what do you mean?
Explanation:
Explain how energy can be absorbed in a chemical reaction
Answer:
Energy is used to break bonds in reactants, and energy is released when new bonds form in products. ... In other chemical reactions, it takes more energy to break bonds in reactants than is released when bonds form in products. These reactions, called endothermic reactions, absorb energy.
Explanation:
What is the charge of a Gamma particle?
Answer:
+2
Explanation:
I just looked it up, but it says the Alpha Particle charge is +2 so I hope that helps.
Answer:
+2e
Explanation:
edge 2020
Ca(ClO4)2
Ionic compound name
Answer:
I thing Calcium Perchlorate
Hydroxyl ions
Definition:
Answer:
the anion OH having one oxygen and one hydrogen atom.
Explanation:
What is a key property of crystals?
Answer: Crystals differ in physical properties, i.e., in hardness, cleavage, optical properties, heat conductivity, and electrical conductivity.
These properties are important since they sometimes determine the use to which the crystals are put in industry.
hope this helps :)
Answer:
A crystals key properties are hardness, cleavage, optical properties, heat conductivity, and electrical conductivity.
Explanation:
These properties are important since they sometimes determine the use to which the crystals are put in industry.
what is an orbital?
Answer:
Relating to orbit or orbits
Explanation:
Which element in row 6 of the periodic table (shown below) has the largest radius?
Select one:
a. Hg
b. Cs
c. Os
d. Rn
Answer:
Cs
Explanation:
It has less amount of proton numbers so they won't attract the electrons as much as the other elements with increased number of protons will.
What is one ecosystem you can think of? What non-living and living things are found in your ecosystem?
What mass of calcium bromide is needed to prepare 150.0 mL of a 3.50 M solution? (Assume that the molecular weight of CaBr2 is 200.618 g/mol)
Answer:
105g
Use the following formula to calculate the mass of calcium bromide that is needed:
volume of solution × molar concentration × molar mass = mass of solute
The result is 105 g, which has three significant figures, because the term with the least precision (3.50 M) has three significant figures.
Explanation:
What do electron capture and positron emission have in common?
Answer:
They both keep the mass number the same while bringing the atomic number down 1
Explanation:
Answer:
They both keep the mass number the same while bringing the atomic number down 1.
Thank the person above or below! Whoever said this answer just wanted to answer it so I could keep my streek, sorry!
Which is a pure substance?
A) mixture
B) solution
C) element
What state of matter is water at 80 degrees celsius?
Answer:
Liquid
Explanation:
Because water becomes a solid (freezes) at 0°C and becomes a gas (evaporates) at 100°C, it is liquid at any temperature in between.
Plz help!
What is 1 item that is a compound?
Give an example of how the 1 item is a compound
Answer:
EX: Table Salt (NaCl)
Explanation:
A compound is a substance that has two or more elements whos atoms are bonded together.
When a substance is in the liquid state, how are the particles of that substance
behaving
Answer:
In liquids, particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles. With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion.
Explanation:
In liquids, particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles. With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion.
a prospector finds 39.39 g of gold. How many atoms of gold does he have
Answer:
the answers is 1.204×10/23
Explanation:
idek
According to Avogadro's number, there are 1.204 × 10²³ atoms in 39.39 g of gold.
To determine the number of atoms in 39.39 g of gold, we need to use the Avogadro's number, which is equal to 6.022 × 10²³ atoms/mol.
First, need to convert the given mass from grams to moles by dividing it by the molar mass of gold, which is 196.967 g/mol.
[tex]\dfrac{39.39}{196.96}\\=0.19999[/tex] moles
Now, we can use Avogadro's number to find the number of atoms:
[tex]0.19999\times6.023\tims10^2^3\\=1.204\times10^2^3[/tex]
Therefore, the prospector has 1.204 × 10²³ atoms of gold.
Learn more about Avogadro's number,here:
https://brainly.com/question/28812626
#SPJ6
Which statements describe an aquifer? Select the three correct answers.
layer of permeable rocks
can be created only by digging or drilling
underground water storehouse
layer of impermeable rocks
can be recharged after being depleted
Answer:
-layer of permeable rocks
-underground water storehouse
-layer of impermeable rocks
Explanation:
The statements that describe aquifer are:
A. a layer of permeable rocks.
C. underground water storehouse.
D. the layer of impermeable rocks.
What is an aquifer?Aquifers are bodies of permeable rock or sediment that have been flooded by groundwater.
As rainwater penetrates through the earth, groundwater enters an aquifer.
It has the ability to go through the aquifer and re-emerge via springs and wells.
There are three types of aquifers
ConfinedUnconfinedPerchedThus, the correct options are A. a layer of permeable rocks., C. underground water storehouse., D. the layer of impermeable rocks.
Learn more about aquifer
https://brainly.com/question/14738233
What is true about a pseudoscientific idea?
A) it can be replicated and verified.
B) It is improved with new information.
C) It ignores parts of the method within an investigation.
D) It tries to explain natural phenomena by analyzing, observing, and testing.
Answer: C
Explanation:
Which activity uses water for both recreational and industrial purposes?
machinery cooling
waterskiing
irrigation
fishing
Answer:
D. Fishing.
Explanation:
Fishing refers to an activity which typically involves catching fishes for both recreational (sports or hobby) and industrial (feeding or sales) purposes. In finishing, the fishes are caught from water such as a pool, lake, river etc. through the use of fishing nets, rod and lines and fish hooks.
Basically, when fishing is done with family members, peers or even individually such as on a vacation, sports competition and pleasure, it is mainly considered to be for recreational purposes.
However, when fishing is done on a commercial basis such as selling them consumers, it is considered to be for industrial purposes.
Hence, fishing is an activity which uses water for both recreational and industrial purposes.
Answer:
It's d fishing
Explanation:
got it correct on edge