can you help me please ​

Answer: Internal Temperatures. Similarly, the cardiovascular, integumentary (skin and associated structures), respiratory, and muscular systems work together to help the body maintain a stable internal temperature. If body temperature rises, blood vessels in the skin dilate, allowing more blood to flow near the skin's surface.

Explanation:

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Answer:

a. nitrate ion

e. sulfur dioxide

Explanation:

Trigonal planar geometry, is possible, where the combination of atoms or lone pain form a triangle which is is same plane.

Hence, from the given options,

Therefore,

From the given options, the correct answer is -

a. nitrate ion

e. sulfur dioxide

Answer: [tex]Pb(NO_3)_2(aq)+2KI(aq)\rightarrow PbI_2(s)+2KNO_3(aq)[/tex]

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

The double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.

The balanced molecular equation is:

[tex]Pb(NO_3)_2(aq)+2KI(aq)\rightarrow PbI_2(s)+2KNO_3(aq)[/tex]

Answer:

chemical reaction hope this helps ;)

Explanation:

Answer:

reaction, reversed, The Law Of Conservation of Mass, mass, rusts, oxygen

Explanation:

HOPE THIS HELPS!

Answer:

55.18 L

Explanation:

First we convert 113.4 g of NO₂ into moles, using its molar mass:

Then we use the PV=nRT formula, where:

Input the data:

And solve for V:

Answer:

Explanation:

Mg²⁺ is divalent , hence

Molecular weight / 2 = equivalent weight .

.25 moles = 2 x .25 equivalents = .5 equivalents .

Cl⁻ is monovalent so

molecular weight = equivalent weight

.50 mole = .50 equivalent

Total equivalent = .50 of Mg²⁺ + .50 of Cl⁻

= 1 equivalent .

Answer:

option a. iron,copper, aluminium.

Answer:

The climate has been caused by many natural factors including changes in the sun emissions from volcanoes variations in Earth's orbit and levels of carbon dioxide. Global climate change has typically occured very slowly over thousands or millions of years .The three causes of the Earth's climate are

these are the causes of the Earth's climate.

Climate is a average weather in a given area for a long period of time is called a climate

maybe this might help ur question

Answer:

5 degrees required for ice

Answer:

50.127 J

Explanation:

The following data were obtained from the question:

Initial temperature (T₁) = –5 °C

Final temperature (T₂) = 37 °C

Mass (M) = 3.10 g

Specific heat capacity (C) = 0.385 J/gºC

Heat (Q) absorbed =?

Next, we shall determine the change in temperature. This can be obtained as follow:

Initial temperature (T₁) = –5 °C

Final temperature (T₂) = 37 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 37 – (–5)

ΔT = 37 + 5

ΔT = 42 °C

Finally, we shall determine the heat absorbed. This can be obtained as follow:

Mass (M) = 3.10 g

Specific heat capacity (C) = 0.385 J/gºC

Change in temperature (ΔT) = 42 °C

Heat (Q) absorbed =?

Q = MCΔT

Q = 3.10 × 0.385 × 42

Q = 50.127 J

Thus, the heat absorbed is 50.127 J.

Answer:A.

The products must contain the same numbers and types of atoms as the reactants.

Explanation: I think this

Answer:a

Explanation:

Answer:

0.0821 L•atm/mol•K

Explanation:

The value of the ideal gas can be obtained as follow:

NOTE: We shall use the standard value for each variable. Based on the options given above, we shall use the equivalent units as well.

Pressure (P) = 1 atm

Volume (V) = 22.4 L

Number of mole = 1 mole

Temperature (T) = 273 K

Gas constant (R) =?

PV = nRT

Divide both side by nT

R = PV / nT

R = (1 × 22.4) / (1 × 273)

R = 22.4 / 273

R = 0.0821 L•atm/mol•K

Thus, the ideal gas constant is 0.0821 L•atm/mol•K

Answer:

Another answer is : It has equal numbers of each type of atom in its reactants and products.

Explanation:

I just got it right on A.pex

Given the data from the question, the correct statement is:

Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.

The reactants are located on the left side while the products are located on the right side.

Reactants —> Products

The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

From the law of conservation of matter, it is evident that the same atoms of the element in the reactants are present in the products.

Thus, we can conclude that the correct answer to the question is: It has the same types of atoms on both sides of the reaction arrow (Option A)

Learn more about chemical equation:

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Answer: POH=8

Explanation:PH = -log( H+concentration)

PH = 6

POH = 14 - PH = 8

Answer: N5 + H4 and then do 13.5 * 17.8 then solve so 240.3 divided by 9

Your answer is 26.7  Pretty sure

Explanation: (study)

Answer:

Work is all on the paper

Answer:

i cant see the picture sorry

Explanation:

Kinetic energy is the amount of energy present in the object due to motion. It is required by the body for action and motion. The kinetic energy of the car is 34385J.

Kinetic energy is a type of energy that is directly proportional to the mass of the object and the square of the velocity. The formula for the kinetic energy can be given as,

[tex]\rm KE = \dfrac{1}{2}mv^{2}[/tex]

Here,

Mass of the car (m) = 130 kg

Velocity of the car (v) = 23 m/s

Substituting values in the equation:

[tex]\begin{aligned}\rm KE &= \dfrac{1}{2}\rm mv^{2}\\\\&= \dfrac{1}{2}\times 130\times (23)^{2}\\\\&= 34385\;\rm J\end{aligned}[/tex]

Therefore, 34385J is the kinetic energy of the car.

Learn more about kinetic energy here:

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Answer: what

Explanation:

Answer:

Asexual reproduction

Explanation:

Cells are able to re produce themselves without other cells needed. If cells need others to make more then how would that work and plus we wouldn't have the theory of cells existing.

The statement which is TRUE about limiting and excess reactants is (B) The limiting reactant determines the maximum amount of product that can be formed.hence the correct option is (B)

A reactant that is completely consumed at the end of a chemical reaction is known as the limiting reagent.

Since the reaction cannot proceed without this reagent, the amount of product that can be produced is constrained.

The reactant that is totally consumed during a reaction, or the limiting reagent, decides when the process comes to an end.

The precise quantity of reactant required to react with another element can be estimated from the reaction stoichiometry.

Therefore, The statement which is TRUE about limiting and excess reactants is (B) The limiting reactant determines the maximum amount of product that can be formed.hence the correct option is (B)

learn more about Limiting reagent here ;

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Answer:

400 × 22 × 0.664 = 5843.2 J

Answer:

Me

Explanation:

The one with sia??

Answer:

See explanation

Explanation:

From left to right, the oxides across period 3;

i) Period 3 oxides all appear white in colour. They are all crystalline solids and their melting points decrease from left to right.

ii) The volatility of period 3 oxides increases from left to right across the periodic table

iii) The metallic oxides on the right hand side adopt giant ionic structures. Silicon oxide which is in the middle of the period forms a giant covalent structure. Oxides of other elements towards the right hand side form molecular oxide structures.

iv) The acidity of oxides of period 3 increases from left to right. Metals on the left hand side form basic oxides while non-metals on the right hand side form acidic oxides. The oxide of aluminium in the middle is amphoteric.

v) The oxides of period 3 elements do not conduct electricity. However, the metallic oxides on the lefthand side conduct electricity in molten state. The non-metallic oxides on the right hand side are molecular hence they do not conduct electricity under any circumstance.

Answer:

100,000,000,000

Explanation:

Given that :

1 hubble space telescope pointed at 1 section of the sky reveals 10,000 distinct galaxies ;

Number of sections from which observation is to be made = 10,000,000

Number of distinct galaxy per section = 10,000

Number of galaxies that would exist in the known universe :

Total number of galaxies in the known universe :

Number of galaxies per section * number of sections

10,000 * 10,000,000

= 100,000,000,000s

Answer: a) root - mean - square speeds of helium atom  is 43.1 m/s

b)  root - mean - square speeds of nitrogen molecule  is 16.29m/s

Explanation:

The formula used for root mean square speed is:

[tex]\nu_{rms}=\sqrt{\frac{3RT}{M}}[/tex]

where,

[tex]\nu_{rms}[/tex] = root mean square speed

R = gas constant = [tex]8.314J/Kmol[/tex]

T = temperature = [tex]25^0C=(25+273)K=298K[/tex]

M = atomic mass  

a) root - mean - square speeds of helium atom [tex](He)[/tex]

[tex]\nu_{rms}=\sqrt{\frac{3\times 8.314J/Kmol\times 298K}{4g/mol}}=43.1m/s[/tex]

b)  root - mean - square speeds of nitrogen molecule [tex](N_2)[/tex]

[tex]\nu_{rms}=\sqrt{\frac{3\times 8.314J/Kmol\times 298K}{28.02g/mol}}=16.29m/s[/tex]

Answer: 0.45 moles of water are needed to produce 0.075mol of glucose.

Explanation:

The balanced chemical reaction is:

[tex]6CO_2(g)+6H_2O(l)\rightarrow C_6H_{12}O_6(aq)+6O_2(g)[/tex]

According to stoichiometry :

1 mole of glucose require = 6 moles of [tex]H_2O[/tex]

Thus 0.075 moles of glucose require = [tex]\frac{6}{1}\times 0.075=0.45[/tex] moles of [tex]H_2O[/tex]

0.45 moles of water are needed to produce 0.075mol of glucose.