If the root word "derm” means "skin,” which of these words means "the study of skin diseases and treatment”? dermatologically dermatological dermatologist dermatology

Answer:

Reproductive cells(also known as sex cells) are gametes.

Explanation:

Have a great day :)

Answer:

Gametes are an organism's reproductive cells

Explanation:

Answer:

1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4p6, 5s2, 4d10, 5p6, 6s2, 4f14, 5d10, 6p2.

Explanation:

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Answer:

Altaïr is an ancestor (on the maternal side) of Desmond Miles, a modern-day assassin. He was trained in the Masyaf Castle in Syria by Al Mualim, his guardian since childhood.

Explanation:

Answer:

[tex]T_F=44.0\°C[/tex]

Explanation:

Hello!

In this case, since this calorimetry problem is about the mixing of two volumes of water, we can infer that the heat lost by the hot water is gained by the cold water so we can write:

[tex]Q_{W,hot}=-Q_{W,cold}[/tex]

Which in terms of mass, specific heat and temperature change is:

[tex]m_{W,hot}C_{W,hot}(T_F-T_{W,hot})=-m_{W,cold}C_{W,cold}(T_F-T_{W,cold})[/tex]

Clearly, the specific heat is the same for both waters and the masses, considering the given densities are:

[tex]m_{W,cold}=0.341m^3*\frac{1000kg}{1m^3} =341kg\\\\m_{W,hot}=0.127m^3*\frac{1000kg}{1m^3} =127kg\\[/tex]

Thus, we can solve for the the final temperature as shown below:

[tex]T_F=\frac{m_{W,hot}T_{W,hot}+m_{W,cold}T_{W,cold}}{m_{W,hot}+m_{W,cold}}[/tex]

And by plugging in the values we obtain:

[tex]T_F=\frac{341kg*25.0\°C+127kg*95.0\°C}{341kg+127kg}\\\\T_F=44.0\°C[/tex]

Best regards!

The final temperature of the mixture of hot and cold water at the given masses is 44 ⁰C.

The given parameters;

The mass of the cold water and the hot water are calculated as follows;

[tex]mass = density \times volume\\\\m_{cold} = 1000 \times 0.341 = 341 \ kg\\\\m_{hot} = 1000 \times 0.127 = 127 \ kg[/tex]

Apply the principle of conservation of energy to determine the final temperature of the mixture;

heat lost by the hot water = heat absorbed by the cold water

[tex]341 \times 4200 \times (t - 25) = 127 \times 4200 \times (95 - t)[/tex]

where;

[tex]341(t- 25) = 127(95-t)\\\\341t - 8525 =12065 - 127t\\\\468t = 20590\\\\t = \frac{20590}{468} \\\\t = 44 \ ^0C[/tex]

Thus, the final temperature of the mixture of hot and cold water at the given masses is 44 ⁰C.

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Answer:

C. H₂SO₄

Explanation:

   Given expression:

         H₂O + SO₃  →   H₂SO₄

In the chemical reaction, the product and the reactant have the same species.

Chemical reactions obeys the law of conservation of matter.

This way, atoms combine with one another to give a desired product. The products will contain a mix of the reactants.

Answer:

cccccccccc

Explanation:

Answer:Electrical

Explanation:because its above the earth's surface

Answer:

Chemical O

Explanation:

Answer:

Genetic Diversity Examples

Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species, it ranges widely from the number of species to differences within species and can be attributed to the span of survival for a species.

Explanation:

i hope this helps u.

Answer:

the oldest rocks are in the center of the dome structure.

Explanation:

Answer:

Center

Explanation:

Answer:

97.8

Explanation:

Answer:

14.44 Liters

Explanation:

4NH3(g) + 5O2(g) -----> 4NO(g) + 6H2O(g)

From the equation of the reaction, the mole ratio of NH3 to NO2 = 1:1

Therefore 0.12 moles of NH# produces 0.12 moles of NO

Also from the equation of reaction, mole ratio of NH3 to H20 is 4:6

Therefore, 0.12 moles of NH3 will produce  0.12 * 6/ 4 moles of H2O =0 0.18 moles of H2O

Total moles of gases produced = 0.30 mole

From Avogadro's law:

v1/n1 = v2/n2

v1 = 13.0 L

n1 = 0.12 + 0.15= 0.27 moles

v2 = ? =

n2 = 0.30

V2 = v1n2/n1

v2 = 13.0 * 0.30/0.27

V2 = 14.44 Liters

The reactants in the reaction HCl + NaOH → NaCl + H₂0 are HCI and NaOH Hence, Option (A) is correct

The substance(s) to the left of the arrow in a chemical equation are called reactants.

A reactant is a substance that is present at the start of a chemical reaction.

In the given case, HCI and NaOH are the reactants, they both react to form the products, which are NaCl and H₂0.

Therefore,The reactants in the reaction HCl + NaOH → NaCl + H₂0 are HCI and NaOH Hence, Option (A) is correct

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Answer:

Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances. Tin, sulfur, and diamond are examples of pure substances that are chemical elements. All elements are pure substances

Explanation:

Answer:

a. Ca(s) + 2H⁺ → Ca²⁺ + H₂(g)

b. 0.0100 moles Ca; 0.0140 moles HCl.

c. HCl is limiting reactant.

d. 0.0030 moles of Ca

Explanation:

a. In water, HCl dissociates in H⁺ and Cl⁻ and CaCl₂ in Ca²⁺ and 2 Cl⁻. The ionic equation is:

Ca(s) + 2H⁺ + 2Cl⁻ → Ca²⁺ + 2Cl⁻ + H₂(g)

b. Moles Ca -Molar mass 40.1g/mol-:

0.401g * (1mol / 40.1g) = 0.0100 moles Ca

Moles HCl:

0.350L * (0.0400mol / L) = 0.0140 moles HCl

c. In the reaction, 1 mole of Calcium reacts with 2 moles of HCl.

For a complete reaction of 0.0100 moles of Calcium there are necessaries:

0.0100mol Ca * (2 mol HCl / 1 mol Ca) = 0.0200 moles HCl

As there are just 0.0140 moles of HCl,

HCl is limiting reactant

d. For a complete reaction of 0.0140 moles of HCl, the moles of Ca that react are:

0.0140 moles HCl * (1 mol Ca / 2 mol HCl) = 0.0070 moles Ca

That means will remain:

0.0100 moles - 0.0070 moles:

0.0030 moles of Ca

Answer:

what's the question? is it A

A 30.0 ml sample of 0.200 M Ba(OH)2 is titrated with 0.100 M HCl. teh pH will be:

a) The pH of the solution before the addition of HCl is 13.301.

b) The pH of the solution after the addition of 25.0 mL HCl is 13.494.

pH is potential hydrogen. It is the measurement of the acidity and basicity of any solution.

a)

[tex]\rm Ba(OH)_2 = Ba_2+ + 2OH^-Ba(OH)_2[/tex]

Given, [OH¯] = 0.200 M

pOH = -log 0.200 = 0.699

pH = 14.000 - pOH = 14.000 - 0.699 = 13.301

b)

Now 25 ml HCl is added

0.025 × 0.100 = 0.0025

Moles of OH = 0.02 × 0.0025 = 0.0005

Remaining OH =   0.0025 – 0.0005  = 0.00245

Now calculate the pH

0.055 is divided by 0.200 = 0.275

pOH = -log 0.275 = 0.5606

pH = 14.000 - 0.5606 = 13.4394

Thus, a) 13.301.

b) 13.4394.

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Answer:

Density = 4.191 gm/L

Explanation:

Given:

Molar mass = 93.89 g/mol

Volume(Missing) = 22.4 L (Approx)

Find:

Density at STP

Computation:

Density = Mass/Volume  

Density = 93.89 / 22.4  

Density = 4.191 gm/L

Answer:

Topographical is the correct ans

Answer:

The hydroxyl ions (OH-) released will combine with any hydrogen ions (H+) in the solution to form water molecules (OH- + H+ = H2O).

Explanation:

Answer: the answer is C hope it helps

Explanation:

Answer:

1.4776 g

Explanation:

First, let us determine the number of moles present in  100 mL of 0.1005 M solution of Ca2+.

mole = molarity x volume in Liter

mole of Ca2+ = 0.1005 x 0.1 = 0.01005

Also,

mole = mass/molar mass

mass of 0.01005 mole Ca2+ = mole x molar mass

                 = 0.01005 x 147.02 = 1.4776 g

Since 1 mole of Ca2+ is present is 1 mole of CaCl2·2H2O, 1.4776 g of CaCl2·2H2O would be weighed out in order to prepare 00mL of a 0.1005M solution of Ca2+.

To prepare a 100 mL solution of 0.1005 M [tex]Ca^2^+[/tex], we would need to weigh out approximately 14.737 grams of [tex]CaCl_2.2H_2O[/tex].

We must use the molar mass and molarity formula to calculate the mass of [tex]CaCl_2.2H_2O[/tex] needed to make a 0.1005 M solution of [tex]Ca^2^+[/tex].

Let's start by figuring out how many moles of [tex]Ca^2^+[/tex]are needed for the solution:

Molarity (M) = moles/volume (L)

0.1005 M = x moles/0.1 L (100 mL converted to liters)

x = 0.1005 moles of [tex]Ca^2^+[/tex]

So, the molar mass of [tex]CaCl_2.2H_2O[/tex]:

Ca (40.08 g/mol) + 2Cl (35.45 g/mol) + 2([tex]H_2O[/tex]) (2 * 18.02 g/mol) = 147.02 g/mol

Then, we calculate the mass

Mass = moles * molar mass

Mass = 0.1005 moles * 147.02 g/mol

Mass = 14.737 grams

Therefore, to prepare a 100 mL solution of 0.1005 M [tex]Ca^2^+[/tex], we would need to weigh out approximately 14.737 grams of [tex]CaCl_2.2H_2O[/tex].

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Answer:

I'd say it's the first option, A study that follows people for an extended period of time to see if they develop a disease or condition.

Explanation:

Explanation:

petrol or bitumen and at least one use of petrol and at least one use of bitumen eg petrol has a lower boiling point and is used as a fuel in cars, bitumen is more viscous and is used to surface roads.Aug 19, 2015

Petrol and bitumen fractions differ in their properties and uses in a number of ways with regard to melting point, viscosity, ignition ,combustion .

Petrol has less number of carbon chains while bitumen has large number of carbon chains.Bitumen has higher melting and boiling point as compared to petrol.

Petrol has higher viscosity as compared to bitumen.It combusts easily while bitumen does not combust completely ,it produces large number of carbon monoxide or soot.

Petrol fractions are used in cars,motorbikes,etc. while bitumen fractions are used in road surfaces and roofing. Boiling point of petrol is 35-70°C while that of bitumen is 700°C.Bitumen is more viscous as compared to petrol.

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Answer:

False

Explanation:

That would still be very unsafe

Answer:

False

Explanation:

even thought it may be washed completely certain chemicals can still remain and be harmful when you consume the food that is put into. Especially if you add heat or cold to the container.

Answer:

moving

Explanation:

In order to produce an electric current in a coil of wire, a magnet field through the coil must be moving.

Electromagnetic induction is a process in which electric field is produced due to the change in the value of magnetic field.

So, for the production of an electric current in a coil of wire, a magnet field should be moving through the coil of wire. Process of this electromegnetism get clear through the below attached image.

Hence magnetic field should be moving.

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Answer:

I think it is c

Explanation:

Answer:

Chemical digestion

Explanation:

The type of digestion taking place within the stomach is chemical digestion. When food reacts with stomach acids and other enzymes, a reaction takes place which reduces the food into simpler bits.

Answer:

a. 0.20 M HF and 0.10 M NaOH.

c. 0.10 M HF and 0.10 M NaF

d. 0.10 M HCl and 0.20 M NaF.

Explanation:

A buffer solution consists of a weak acid and its conjugate base, or of a weak base and its conjugate acid.

In this case, HF is the weak acid and F⁻ is its conjugate base.

Let's go case-by-case:

a. 0.20 M HF and 0.10 M NaOH.

b. 0.10 M HF and 0.10 M NaOH.

c. 0.10 M HF and 0.10 M NaF.

d. 0.10 M HCl and 0.20 M NaF.

The correct answers are A), C) and D).