Convert 45 kL to mL (must show work)​

Answer:

HfCl3

Explanation:

Step 1

Divide the percent by mass of each element by its relative atomic mass

Hf- 62.2/178.5, Cl-37.4/35.5

0.348, 1.054

Step2

Divide through by the lowest ratio

0.348/0.348, 1.054/0.348

1, 3

Therefore the empirical formula is HfCl3

Answer:

THE DISTANCE OF THE ROCK REFLECTING HER VOICE IS 82.5 METERS.

Explanation:

In sound waves, the speed of a sound is equal to twice the distance divided by time.

Mathematically,

Speed = 2 * Distance/ Time

Speed = 33- m/s

Time = 0.5 second

Distance = unknown

So re-arranging and introducing the variables into the formula, we have;

Distance = speed * time / 2

Distance = 330 * 0.5 / 2

Distance = 82.5 meters.

The distance away from the rock face which is reflecting her voice is 82.5 meters.

Answer:

Xenon is less reactive.

Explanation:

Xenon is a noble gas with 8 valence electrons whereas bromine is a halogen with 7 and is very reactive.

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore,  xenon (xe) is less reactive than bromine (br) as xenon has noble gas electronic configuration.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

Xenon (xe) is a 18 group element of a periodic table. The electronic configuration of these are of noble gas. Noble gases are very unreactive. These can't react at even harsh condition. Bromine belongs to group 17 of parodic table that is to halogen family. Halogens have high electronegativity. these are very reactive. the ere one electron less than the noble gas electronic configuration.

Therefore,  xenon (xe) is less reactive than bromine (br) as xenon has noble gas electronic configuration.

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Answer:

1

Explanation:

1000ml=1l

? =0.0024l

0.0024/1000×1

0.0000024ml

Volume has been the amount of space covered and occupied by the substance. The volume of the substance has 0.0024 liters is equivalent to 2.4 milliliters.

Volume has been defined as the three-dimensional space that has been occupied by the substance in space. It has been measured in derived units of length like cubic meter (m³), cubic centimeter (cm³), liter (l), and milliliter (ml).

The units of the volume can be converted into various derived units by multiplication and division of the units. The small units are derived from larger ones by multiplying and larger units are converted into smaller ones by division.

Given,

Volume = 0.0024 L

Converting units as:

1 liter = 1000 mL

0.0024 L = 2.4 mL

Therefore, the volume is 2.4 milliliters.

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Answer:atoms contain small negatively charged particles that are called electrons

Explanation:

Answer:

16.5 kilometers is your answer

Answer:

16.5

Explanation:

Answer:

Explanation:

CH₃COCH₂CH₂CH₂CH₃   ------- Ketone because it contains C = O group .

CH₃COH=CHCH₂CH₂CH₃ ------ Alcohol group because it contains  - OH group .

CH₃CH₂COOH  ----    Carboxylic group  because it contains - COOH group.

CH₃CH₂CH₂CHO  -------  Aldehyde group because it contains - CHO group

CH₃CH₂CH₂NH₂  ----- Amine group because it contains - NH₂ group .

The compounds can be categorized as, Carboxylic acid: [tex]\rm CH_3CH_2COOH[/tex]; Amine: [tex]\rm CH_3CH_2CH_2NH_2[/tex]; Ketone: [tex]\rm CH_3COCH_2CH_2CH_2CH_3[/tex]; Aldehyde: [tex]\rm CH_3CH_2CH_2CHO[/tex], and Alcohol: [tex]\rm CH_2COH=CHCH_2CH_2CH_3[/tex].

Organic compounds are the hydrocarbons that has been divided based on the functional groups. The compounds that fall into the following category are:

The compounds can be categorized as, Carboxylic acid: [tex]\rm CH_3CH_2COOH[/tex]; Amine: [tex]\rm CH_3CH_2CH_2NH_2[/tex]; Ketone: [tex]\rm CH_3COCH_2CH_2CH_2CH_3[/tex]; Aldehyde: [tex]\rm CH_3CH_2CH_2CHO[/tex], and Alcohol: [tex]\rm CH_2COH=CHCH_2CH_2CH_3[/tex].

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Answer:

prefix

Explanation:

In a metric system the prefix shows the relationship of each unit to the base unit.

The metric system is an international system of measurement that uses base units of meter for measuring distance, liter for measuring volume and grams for measuring mass.

The metric unit can be smaller or bigger than the base unit, hence, when using the metric system, the prefix shows the relationship between each unit to the base unit.

Thus, we can conclude that the prefix shows the relationship of each unit to the base unit.

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Answer:

Thomson

Explanation:

Atomic models were proposed after the discovery of the atom and the sub-atomic particles. Thomson's model of the atom portrayed electrons stuck in the sea of protons. Thus, option C is correct.

J. J. Thomson proposed the model for atoms and their sub-atomic particles called electrons and protons. It was an important model that depicted the presence of the sub-atomic particles in the atom.

According to him, the electron had been known to carry a negative charge that was stuck in the soup or the sea of the positively charged protons. It resembled a plum cake that has electrons stuck in them as the cherries or the plum.

Therefore, the atomic model of the electron stuck in the sea of protons was given by J. J. Thomson.

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Answer:

-2m/s/s

Explanation:

Acceleration = change in speed / change in time

Change in speed = final speed - initial speed

In this case the change in speed was 10m/s - 30m/s = -20m/s

And change in time was 10 sec (within 10 sec)

Therefore acceleration = -20/10 = -2m/s/s

The acceleration is negative because the car slowed down (decelerated essentially) and the unit for acceleration is meters per second per second because it is the change in speed per second.

Hope this helped!

Answer:

d ≈ 3 g/cm³

Explanation:

Density Formula: d = m/v

Step 1: Define variables

mass m = 898 grams

volume v = 300 cm³

Step 2: Substitute and evaluate

d = 898 g/300 cm³

d = 2.99333 g/cm³

d ≈ 3 g/cm³ (1 sig fig)

Answer:

50.3mL of mercury are in 1.50lb

Explanation:

Punds are an unit of mass. To convert mass to volume we must use density (13.546g/mL). Now, As you can see, density is in grams but the mass of mercury is in pounds. That means we need first, to convert pounds to grams to use density and obtain volume of mercury.

Mass mercury in grams:

1.50lb * (1kg / 2.20lb) = 0.682kg = 682g of mercury.

Volume of mercury:

682g Mercury * (1mL / 13.546g) =

Answer:

pKa = 9

Explanation:

In this case, we have to remember the meaning of "p". When we use "p" in any calculation we have to apply the minus ten based logarithm, so:

[tex]p~=~-Log[/tex]

For example, when we use the "pH" value. We have to apply the minus ten based logarithm of the concentration of the hydronium ion:

[tex]pH~=~-Log[H^+][/tex]

So, if we have wanted to calculate the pKa value. We have to apply the minus ten based logarithm of the Ka value, so:

[tex]pKa~=~-Log~Ka[/tex]

Now we can plug the value into the equation:

[tex]pKa~=~-Log~1x10^-^9[/tex]

[tex]pKa~=~9[/tex]

The pKa value is 9.

I hope it helps!

Explanation:

minerals are common in vitamin product iron and calciumall provide day to day nutrients dad the bmicoody needs in order to function food that are full of

Answer:

It is very important in our lives....

Explanation:

It is used to create the materials,used in construction of roads and buildings,they also serve as critical components in the manufacturing of high tech electronics.

Answer:

Hola Amigo! Here's Ur Answer :D

Explanation:

The chemical reaction we are most familiar with is that of melting: sugar decomposes at a temperature ranging between 184 and 186°C. This is a very recent discovery we owe to a team of researchers in Illinois. Basically, when we heat sucrose gently, this produces a phenomenon known as “ apparent melting ”.

Happy to Help! :D

Answer:

physical change is what the answer above is saying for anybody who is confused

Explanation:

a physical change has to do with appearance while chemical change has to do with composition. melting the sugar does not change the fact its just sugar therefore not changing the composition.

HOPE THIS HELPS!!! :)

<333333333333

Answer:

Two pi bonds, one sigma bond.

Explanation:

A triple bond has three bonds:

2 pi bonds, and one sigma bond.

Answer:

Two pi bonds & one sigma bond.

A triple bond is made of:

Hope it helps!

Answer:

6733.5 g of NaCl

Explanation:

We can assume that the salt solution is a saline solution which contains NaCl in water at 0.90%, whose density is 1.005 g/ml.

So we need to apply the density concept to solve the question.

Density = mass / volume

We convert dL to mL → 67 dL . 100mL / 1 dL = 6700 mL

Density = mass / volume

Volume . Density = mass

6700 mL . 1.005 g = 6733.5 g of NaCl

Answer:

The last digit in any measured quantity of a tool is the minimum it can measure so

5 books ---- Exact number

5 lb ---- measured

9.23 g----- measured

9.035Kg measured

12 roses ------ exact

12 inches in 1 foot ----- exact

361 miles ------- measured

100 cm in 1 m ------- exact

Answer:

A) 6.00 mol.

B) 0.375 L or 375 mL

C) 6.00 M

Explanation:

Hello,

A) In this case, from the definition of molarity, we compute the moles for the given volume and concentration:

[tex]n=M*V=1.00L*6.00mol/L=6.00mol[/tex]

B) In this case, from the stock solution, the required volume is:

[tex]V=\frac{6.00mol}{16.00mol/L}=0.375L[/tex]

C) In this case, we apply the following formula for dilution process:

[tex]M_1V_1=M_2V_2[/tex]

Thus, solving for the final molarity, we obtain:

[tex]M_2=\frac{M_1V_1}{V_2}=\frac{16.00M*0.375L}{1.00L}\\ \\M_2=6.00M[/tex]

Regards.

Answer:

995

Explanation:

1kg = 1000g

lalalalalalalalalalalalallalalalalalalalalalalalalalalalalalalala

Answer:

995kg = 995000g

Explanation:

1 kg = 1000 g

Answer:

A. 1.512*10^3

B. 5.29*10^-3  

C. 2.152*10^-3

Explanation:

Exponential notation is where a number is represented in the form:

x * 10^n

where x is a number between 1 and 10.

In order to represent 1512 as a number between 1 and 10, we need to divide it by a multiple of 10. In this case, dividing is by 1000 will move it 3 decimal places to the left and get us 1.512 which is perfect. Because we divided by 1000 to get there, 1.512 needs to multiply by 1000 to equal the original number 1512. Since 1000 = 10^3, 1512 in exponential form is:

1.512*10^3

Similarly for the other ones:

0.00529 we need to multiply by 1000 to get to 5.29 (between 1 and 10) so this needs to multiply by 0.001 (1/1000) to equal original number so in exponential form is:

5.29*10^-3       (10^-3 = 0.001)

Finally:

21.52*10^-4 I would recommend converting back to the original number first, which would give us:

21.52*0.0001 = 0.002152

Which we need to multiply by 1000 to get right number so in exponential form is:

2.152*10^-3

Hope this helped!

Answer:

1.Growth.

2 Reproduction.

3.respond to stimuli

4.are made from more than 1 cell

5.need energy to live

hope this helped

Answer:

F subscript net, y = F subscript N minus F subscript g minus F subscript p sin(32).

Explanation:

F subscript net, y = F subscript N minus F subscript g minus F subscript p sin(32).

Forces acting on box :

We have four forces acting on the box. Taking the upward direction as positive direction for the vertical axis:

- The push, which pushes down along the ramp inclined at 32 degrees. Its vertical component will be , where F is the magnitude of the push

- The weight of the box, of magnitude , with m being the mass of the box and g being the acceleration of gravity (9.8 m/s^2). This force is already directed vertically downward, so we don't need to resolve it into the vertical direction

- The frictional force, of magnitude , where  is the coefficient of friction, directed upward along the inclined plane. Its vertical projection will be

- The normal reaction, whose magnitude is equal to the component of the weight perpendicular to the inclined plane, but with opposite direction (upward): . If we resolve it along the vertical direction.

So, the net force along the y-direction will be:

F subscript net, y = F subscript N minus F subscript g minus F subscript p sin(32).

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Answer:

f. 0.0537 kg

Explanation:

To solve this, we use the formula for force of buoyancy (Fb) = Vs × D × g

Where; Fb= Force of buoyancy

Vs= Volume of submerged

block

D= Density of water that block

submerges in

g= acceleration due to gravity

In this question, volume of block can be calculated using L×B×H

= 4.3cm × 5.9cm × 2.75cm = 69.7675cm^3

If 77% of the block is submerged in water, then 77/100 × 69.7675cm^3

= 53.72cm^3 is the Volume of submerged block

Density of water is known as 1000kg/m^3 while the gravitational force is 10m/s^2

We need to convert the Vs (volume of submerged block) to m^3 by dividing by 1,000,000

Hence, Vs = 53.72/1000000

Vs= 0.00005372m^3

Using the formula; (Fb) = Vs × D × g

Fb = 0.00005372m^3 × 1000kg/m^3 × 10m/s^2

Fb = 0.5372kg/m/s^2

Therefore, the force of buoyancy of the object on water is 0.5372kg/m/s^2

Recall that; Mass (m) = Volume (V) × Density (D)

Force of buoyancy (Fb) = Vs×D = mass (m) × acceleration due to gravity (g)

i.e. mass = Fb/g

= Mass of the block = 0.5372/10

Mass = 0.05372kg

Therefore, the mass of the block in kg is 0.05372kg

Answer:

Energy is not created but transformed meaning the energy just transformed into a different type meaning at all points of the ramp the energy stays the same because all of its energy is just transformed into kinetic energy.

Explanation:

Answer:

5 significant figures: 670.90 in.

4 significant figures: 8.314 J/mol-K, 6.022x10 23 mol-1, 0.6258 mg, 2.205 lb and 3270 ft.

3 significant figures: 40.7 g.

2 significant figures: 12 mL, 1.2 years, 7.0 m2, 50, cm and 90 m.

1 significant figure: 0,005 L.

Explanation:

Hello,

In this case, we proceed as follows:

* 8.314 J/mol-K has 4 significant figures since 8, 3, 1 and 4 are significant (nonzero).

* 6.022x10 23 mol-1 has 4 significant figures since 6, 0, 2 and 2 are significant including the zero as it is at the right of the first nonzero digit (6).

* 12 mL has 2 significant figures since 1 and 2 are significant (nonzero).

* 1.2 years has 2 significant figures since 1 and 2 are significant (nonzero).

* 7.0 m2 has 2 significant figures since 1 and 2 are significant (nonzero).

* 50, cm has 2 significant figures since 1 and 2 are significant (nonzero).

* 0,005 L has 1 significant figure since 5 is the only nonzero digit.

* 40.7 g has 3 significant figures since 4, 0 and 7 are significant including the zero as it is at the right of the first nonzero digit (4).

* 670.90 in has 5 significant figures since 6, 7, 0, 9 and 0 are significant including the zeros as they are at the right of the first nonzero digit (6).

* 0.6258 mg has 4 significant figures since the first zero is at the left of the first nonzero digit, therefore, it is not included.

* 2.205 lb has 4 significant figures since 2, 2, 0 and 5 are significant including the zero as it is at the right of the first nonzero digit (2).

* 3270 ft has 4 significant figures since 3, 2, 7 and 0 are significant including the zero as it is at the right of the first nonzero digit (3).

* 90 m has 2 significant figures since 1 and 2 are significant (nonzero).

Regards.

Answer:

Connecting wires provide a medium to an electrical current so that they can travel from one point on a circuit to another. ... In a basic circuit, the wire comes from one terminal of a power source, then connects to a switch that determines whether the circuit is open or closed.

Explanation:

Answer:

kilograms

Explanation:

Answer:B) Kilograms

Explanation:I took the test and got it right!