Grade 10 Science send answers plssssss

Answer:

ATP asa, Helicasa, Proteasa, ARN polimerasa

Explanation:

Las enzimas son un tipo de biomoleculas que se corresponden con las proteinas.

Al momento de referirse a ellas, se utiliza la terminación asa.

ATPasa → Sintetizando ATP para el funcionamiento celular

Helicasa → Abre las hebras de ADN permitiendo el paso de la horquilla para el proceso de replicación de ADN.

Proteasas → Enzimas que degradan proteinas mal plegadas, rompen los enlaces peptídicos.

ARN polimerasa → Sintesis de ARN mensajero a partir de ADN en el proceso de la Transcripción. Se la puede conocer a veces, como primasa.

Answer:

37.5 g NaCl

Explanation:

Step 1: Given data

Step 2: Calculate how many grams of NaCl are in 250.0 g of solution

The concentration of NaCl is 15.0% by mass, that is, there are 15.0 g of NaCl every 100 g of solution.

250.0 g Solution × 15.0 g NaCl/100 g Solution = 37.5 g NaCl

Answer:

Angle of incidence = angle of reflection = 0

Explanation:

Given that,

A light beam strikes a shiny object at a 90-degree angle.

The angle made by incident ray and normal to the mirror is called the angle of incidence and the angle made by the reflected ray and the normal is called the angle of reflection.

Here, the beam strikes normally. So, the angle of incidence is 0.

A/c to the law of reflection,

Angle of incidence = angle of reflection

So, the angle of reflection is also equal to 0.

Answer: The value of [tex]K_c[/tex] for the given chemical equation is 0.0457.

Explanation:

Given values:

Initial moles of [tex]SO_3[/tex] = 0.700 moles

Volume of conatiner = 3.50 L

The given chemical equation follows:

            [tex]2SO_3(g)\rightleftharpoons 2SO_2(g)+O_2(g)[/tex]

I:             0.700

C:              -2x           +2x           x

E:           0.700-2x      2x            x

Equilibrium moles of [tex]O_2[/tex] = x = 0.180 moles

Equilibrium moles of [tex]SO_2[/tex] = 2x = [tex](2\times 0.180)=0.360moles[/tex]

Equilibrium moles of [tex]SO_3[/tex] = 0.700 - 2x = [tex]0.700-(2\times 0.180)=0.340moles[/tex]

Molarity is calculated by using the equation:

[tex]Molarity=\frac{Moles}{Volume}[/tex]

So,

[tex][SO_3]_{eq}=\frac{0.340}{3.50}=0.0971M[/tex]

[tex][SO_2]_{eq}=\frac{0.360}{3.50}=0.103M[/tex]

[tex][O_2]_{eq}=\frac{0.180}{3.50}=0.0514M[/tex]

The expression of [tex]K_c[/tex] for above equation follows:

[tex]K_c=\frac{[SO_2]^2[O_2]}{[SO_3]^2}[/tex]

Plugging values in above expression:

[tex]K_c=\frac{(0.0971)^2\times 0.0514}{(0.103)^2}\\\\K_c=0.0457[/tex]

Hence, the value of [tex]K_c[/tex] for the given chemical equation is 0.0457.

Answer:

Accuracy decreases

Explanation:

All meaurements have an uncertainty (That is, the error of the measurement). The uncertainty of graduated cylinders is higher than uncertainty of pipets.

The accuracy is how close is the measurement to the real value.

If you use graduated cylinders rather than pipets, accuracy decreases because you will have more uncertainty in the measurements putting of the real value and the real value.

The accuracy of the determined value decreases if all measurement is done with graduated cylinders.

The accuracy is the measurement of how close the calculated value is to the real value.

When a student measures the volume with a graduated cylinder the chances of error increase.

Therefore, the accuracy of the determined value decreases if all measurement is done with graduated cylinders.

Learn more about accuracy:

https://brainly.com/question/24869562

Answer:

1 and 2

Explanation:

When Concentrated H2SO4 reacted with the alcohols, they produce cycloalkenes. This is a mechanism known as dehydration of alcohols with an acid catalyst. This is because concentrated H2SO4 acts as a great oxidizing agent. In the process, the alcohols are heated to a high temperature with an excess of pure sulfuric acid. By passing the gases through a sodium hydroxide solution, the carbon dioxide and sulfur dioxide produced by reactive species are eliminated. The reaction mechanism shown in the image below indicates that only compounds 1 and 2 produce only one product.

Answer:

Moles of NaNO2 = 0.158

Moles of HNO2 final = 0.098

Explanation:

Given

Moles of HCl = 12

Moles of HNO2 = 0.11

Moles of NaNO2 = 0.170

HCl +NaNO2 --> HNO2  + NaCl

1 mole of HCl react with one mole of NaNO2 to produce 1 mole of NaCl and 1 mole of HNO2

Moles of NaNO2 = 0.17 - 0.012 = 0.158

Moles of HNO2 final = 0.11 - 0.012 = 0.098

Answer:

[tex]m=3.90mol/kg[/tex]

Explanation:

Hello there!

In this case, since the molality of a solution is calculated by dividing moles of solute by kilograms of solvent, it turns out firstly necessary for us to calculate the moles of methyl alcohol in 75.0 grams as shown below:

[tex]n=\frac{75.0g}{32.04g/mol}=2.34mol[/tex]

Then, the kilograms of water, 0.600 kg, and finally, the resulting molality:

[tex]m=\frac{2.34mol}{0.600kg}\\\\m=3.90mol/kg[/tex]

Regards!

Answer:

6.65 grams of Fe₂O₃ are required to produce 4.65g Fe.

Explanation:

The balanced reaction is:

Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of each compound is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Then you can apply the following rule of three: if by stoichiometry 111.7 grams of Fe are produced from 159.7 grams of Fe₂O₃, 4.65 grams of Fe are produced from how much mass of Fe₂O₃?

[tex]mass of Fe_{2} O_{3} =\frac{4.65 grams of Fe*159.7 grams of Fe_{2} O_{3}}{111.7grams of Fe}[/tex]

mass of Fe₂O₃= 6.65 grams

6.65 grams of Fe₂O₃ are required to produce 4.65g Fe.

no sefdrcdftrgfkjj jhhhgfd

Answer:

F₂ + At⁻

Explanation:

Astatine is the only Halogen that does not exist as a diatomic molecule. One Astatine atom would have a charge of 1⁻. Fluorine is the most electronegative element, and therefore very reactive and commonly forms a diatomic molecule.

Answer:

9.6x10⁹ mg

Explanation:

In order to solve this problem we need to convert 9600 kg into mg.

First we convert 9600 kg into g, keeping in mind that 1 kg = 1000 g:

9600 kg * [tex]\frac{1000g}{1kg}[/tex] = 9.6x10⁶ g

Then we convert 9.6x10⁶ g into mg, keeping in mind that 1 g = 1000 mg:

9.6x10⁶ g * [tex]\frac{1000mg}{1g}[/tex] = 9.6x10⁹ mg

The mass of milk miligrams is 9.6x10⁹.

Answer:0.46

Explanation:

Answer:

63 g Al is required to react with 35 mL of 2.50 M hydrochloric acid

I'm sorry if it's wrong, I tried.

Explanation:

Answer: The coefficients for the given reaction species are 1, 6, 2, 3.

Explanation:

The given reaction equation is as follows.

[tex]Cr_{2}O^{2-}_{7} + Cl^{-} \rightarrow Cr^{3+} + Cl_{2}[/tex]

Now, the two half-reactions can be written as follows.

Reduction half-reaction: [tex]Cr_{2}O^{2-}_{7} + 3e^{-} \rightarrow Cr^{3+}[/tex]

This will be balanced as follows.

[tex]Cr_{2}O^{2-}_{7} + 14H^{+} + 6e^{-} \rightarrow 2Cr^{3+} + 7H_{2}O[/tex] ... (1)

Oxidation half-reaction: [tex]Cl^{-} \rightarrow Cl_{2} + 1e^{-}[/tex]

This will be balanced as follows.

[tex]6Cl^{-} \rightarrow 3Cl_{2} + 6e^{-}[/tex] ... (2)

Adding both equation (1) and (2) we will get the resulting equation as follows.

[tex]Cr_{2}O^{2-}_{7} + 14H^{+} + 6Cl^{-} \rightarrow 2Cr^{3+} + 3Cl_{2} + 7H_{2}O[/tex]

Thus, we can conclude that coefficients for the given reaction species are 1, 6, 2, 3.

Answer:

The correct answer is -all of the above.

Explanation:

Muscle fatigue is a reduced ability in work capacity caused by work itself. It is known that altering oxygen is contracting skeletal muscle affects performance. Reduced O2 supply increases the rate of muscle fatigue.

The lactic acid is accumulated as it forms rapidly but the breaking of the lactic acid is slow down, which causes muscle fatigue. Less ATP and glycogen in muscle results in fatigue as the muscle is not able to generate energy to power contractions and therefore contributes to muscle fatigue.

The question is incomplete, the complete question is:

Liquid A is known to have a lower viscosity and lower vapor pressure than Liquid B. Two 10 L glass flasks are evacuated and sealed. 35.0 of Liquid A are injected through the seal into one flask, and 35.0 mL of Liquid B are injected into the other flask. After 30 minutes, the pressures [tex]p_A[/tex] and [tex]p_B[/tex] inside the flasks are measured.

a. [tex]p_A[/tex] will be greater than

b. [tex]p_A[/tex] will be less than [tex]p_B[/tex]

c. [tex]p_A[/tex] will be equal to [tex]p_B[/tex]

d. It's impossible to predict whether [tex]p_A[/tex] or will be greater without more information.

Answer: The correct option is b) [tex]p_A[/tex] will be less than [tex]p_B[/tex]

Explanation:

Vapor pressure is defined as the equilibrium pressure which is exerted by the vapor phase to be in thermodynamic equilibrium with its condensed state (liquid phase) in a closed system at a given temperature.

We are given:

Vapor pressure of A < Vapor pressure of B

This means that a lesser number of gaseous molecules will form over its surface and thus, will experience lower pressure.

Thus, [tex]p_A<p_B[/tex]

Hence, the correct option is b) [tex]p_A[/tex] will be less than [tex]p_B[/tex]

"At sea level, the air that surrounds us presses down on our bodies at 14.7 pounds per square inch . (gooxgle) "

Basically the deeper you go under the water, whether that be a pool or the sea the pressure will increase because of the weight of the water above you.  Which causes greater force.

Answer:

I think B

Explanation:

2Ca + O2 -> 2CaO

The product of the unbalanced equation: [tex]\rm Ca(s) + O_2(g)[/tex] is [tex]\rm CaO(s)[/tex]. The correct answer is option B.

A product is a material which arises from a chemical process. It is the end result of the reaction and is produced by the rearrangement of the atoms or molecules of the reactants.

This reaction's balanced chemical equation is:

[tex]\rm 2Ca(s) + O_2(g) \rightarrow 2CaO(s)[/tex]

The reaction begins by heating calcium metal in the presence of oxygen gas or by exposing calcium metal to oxygen-containing air. Calcium oxide  [tex](\rm CaO)[/tex] is formed by the reaction of calcium metal (Ca) with oxygen gas[tex]\rm (O_2)[/tex].

Therefore, the result of the stated chemical reaction is [tex]\rm CaO(s)[/tex]. Option B is the correct answer.

Learn more about product here:

https://brainly.com/question/32099757

#SPJ4

Answer: The Ka expression for an aqueous solution of hypochlorous acid is [tex]K_{a} = \frac{[H_{3}O^{+}][OCl^{-}]}{[HClO]}[/tex].

Explanation:

The chemical formula of hypochlorous acid is HClO. So, when it is added to water (solvent) then its dissociation is as follows.

[tex]HClO + H_{2}O \rightarrow H_{3}O^{+} + Cl^{-}[/tex]

When we write the equilibrium constant for this reaction then it is called acid acid dissociated constant.

Hence, the expression for acid dissociation constant of this reaction is as follows.

[tex]K_{a} = \frac{[H_{3}O^{+}][OCl^{-}]}{[HClO]}[/tex]

Thus, we can conclude that the Ka expression for an aqueous solution of hypochlorous acid is [tex]K_{a} = \frac{[H_{3}O^{+}][OCl^{-}]}{[HClO]}[/tex].

Answer:

q6= third option

q7= third option

Explanation:

kinetic molecular theory deals with temperature

pressure inversely proportional to volume so when volume doubled, pressure halved given that mass and temperature constant

Answer:

x~ 34.19 grams del sal o ~ 34 grams!

Explanation:

el porcentaje de masa se escribe como

% de masa = masa de sal / (masa de sal + masa de disolvente) * 100%

aquí, el disolvente se da como 500 g de agua.

usa x en lugar de masa de sal y resuelve usando álgebra

6.4 = x / (x+ 500) * 100

0.064 = x / (x+500)

0.064 x + 32 = x

32 = x-0.064x

32 = 0.936 x

x~ 34.19 grams del sal o ~ 34 grams!

Answer: 30.66945 kelvin

Explanation:

Answer:

K = 1.93 °C/m

Explanation:

This question can be solved by formula of elevation of boiling point.

Boiling T° of solution - Boiling T° of pure solvent = K . m . i

Our solute is urea.

Our solvent is X.

We convert mass of urea to moles: 19.9 g . 1 mol / 60.06g = 0.331 mol

We convert g of solute to kg = 200 g . 1 kg/ 1000g = 0.2kg

m = molality → moles of solute / kg of solvent

m = 0.331 mol / 0.2 kg = 1.66 m

As urea is an organic compound, no ions will be formed.

i = 1 (a non ionizing compound)

Let's replace data in formula:

134,1°C - 130.9°C = K . 1.66 m . 1

3.2 °C / 1.66 m = K

K = 1.93 °C/m

Answer:

There are about 68.33 grams of oxygen present in 93.98 g of CO2.

Answer:

"7.46" is the correct answer.

Explanation:

Given that:

[tex]pH=4.64[/tex]

[tex]C=0.015 \ M[/tex]

The equation:

⇒ [tex]HA \rightleftharpoons H^++A^-[/tex]

HA = C - Cα

H⁺ = Cα

A⁻ = Cα

now,

⇒ [tex]pH=-log(H^+)[/tex]

          [tex]=-log(C \alpha)[/tex]

          [tex]=4.64[/tex]

    [tex]C \alpha = 2.3\times 10^-5 \ M[/tex]

As we know,

⇒ [tex]K_a=C \alpha^2[/tex]

         [tex]=(\frac{C \alpha}{C} )^2\times C[/tex]

         [tex]=\frac{(2.3\times 10^{-5})^2}{0.015}[/tex]

         [tex]=3.5\times 10^{-8}[/tex]

hence,

⇒ [tex]pK_a=-log(K_a)[/tex]

           [tex]=7.46[/tex]          

Answer:

South China sea

Explanation:

To the west is the South China Sea, to the east the Philippine Sea and the Pacific Ocean, and to the south the Celebes Sea (or Sulawesi Sea).

Answer:

B.  Keq = 6.0 x 10-2.

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to remember that any equilibrium constant is computed by dividing the concentration of products by that of reactants:

[tex]Keq=\frac{[Prod]}{[Reac]}[/tex]

Thus, a reaction that is reactant-favored will have a Keq>1 because the concentration of reactants prevail over that of products at equilibrium, and thus, the correct answer is B.  Keq = 6.0 x 10-2.

Regards!