How many grams of H are in 1.52 grams acetic acid

Answer:

4 sig figs

Explanation:

There are 4 because they are all # 1 or above.

0 has special rules on whether or not it is significant.

0 being between two other sig figs no matter how far apart makes it a sig fig.

example: 101 is 3 sig figs

0 that is at the end of a non decimal number are not significant.

example: 110 is 2 sig figs

0 that are after a decimal are significant as long as they after another sig fig.

example: 1.000 and .1000 are both 4 sig figs

extra examples:

110.01 is 5 sig figs

110.1 is 4 sig figs

.0001 is 1 sig figs

Answer:

8.34e23 electrons

Explanation:

One atom o 13C has 6 electrons, 6 protons, and 7 neutrons

so 1.39e23 13C atoms will have 1.39e23 x 6 = 8.34e23

Each Carbon-13 atom has exactly 6 electrons. So, 1.39e23 atoms of Carbon-13 would contain a total of 8.34e23 electrons.

To figure out the number of electrons in 1.39e23 atoms of Carbon-13, you need to understand that each atom of carbon-13 contains exactly 6 electrons (as its atomic number is 6). The total number of electrons is simply the number of atoms multiplied by the number of electrons per atom. Hence, the total number of electrons is 1.39e23 * 6 = 8.34e23 electrons.

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Answer:

c) volume

Explanation:

mL is a unit of volume

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.

Ex: cutting a paper, gaining weight, cutting hair

Physical changes end result handiest in a trade in the shape (i.e., strong, liquid, gasoline) or look of a substance, however no longer the chemical composition of the substance.

The substance will still in the end be the same. as soon as a bodily change occurs, it could be reversed.

Modifications within the length or form depending are examples of bodily trade. Physical changes consist of transitions from one country to another, together with from stable to liquid or liquid to gasoline. cutting, bending, dissolving, freezing, boiling, and melting are some of the tactics that create bodily changes.

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Answer:

All of the above

Explanation:

A star is a hot, giant, massive body that is located millions of miles away. These stars appears to be shiny because of its high temperature that glows producing light. They are comprised of gases such as hydrogen and helium, and they release a huge amount of energy when two hydrogen atoms undergoes fusion.

They generally look star shaped (circular type) from earth but they are somewhat spherical in shape due to their gravity that forces them to get bulge at its equator during its rotation around its own axis.

They have a core that contains iron in them and they progressively formed after the exhaustion of the hydrogen and helium fuel.

Hence, all the given options are correct.

Answer:

The answer is A, C, E for E2020 users. I just took the unit test review.

Explanation:

Answer:

A. iodine

C. fluorine

F. bromine

Explanation:

Ionic bonds occur mostly between metals and non-metals. Usually, a wide electronegativity difference is preferred between the two atoms. This makes one atom more desirous to gain electron and other more willing to donate electrons.

To have Zn forming  a compound in the ratio of 1 to 2, the combining power must be similar to this.

The dominant oxidation state of Zn is the is the +2 state.

The other combining atoms must have the ability to recieve the two electrons.

The halogens fit perfectly into this picture. They need just an electron to attain nobility. They are also highly electronegative. If two halogens combines with the Zn, then the ionic bond will result.

The halogens are fluorine,chlorine, bromine, iodine and astatine.

They will form these compounds:

                       ZnF₂, ZnBr₂ and ZnI₂

Final answer:

Iodine, fluorine, selenium, and bromine can form ionic compounds in a 1:2 ratio with zinc since zinc typically exhibits a 2+ charge and these non-metals form -1 anions.

Explanation:

The question asks which elements from a provided list will always form ionic compounds in a 1:2 ratio with zinc. Zinc, being a transition metal, commonly exhibits a 2+ charge in its compounds. For an ionic compound to form with zinc in a 1:2 ratio, the other element must form an anion with a 1- charge to balance the overall charge of the compound, as zinc donates two electrons (one for each anion). From the given options, the elements that will form anions with a 1- charge and hence can form ionic compounds in a 1:2 ratio with zinc (Zn) are: A. iodine (I), C. fluorine (F), E. selenium (Se), and F. bromine (Br). These non-metals typically form -1 anions, which matches the requirement for forming a 1:2 ratio compound with Zn2+. Therefore, the correct options are A. iodine, C. fluorine, E. selenium, and F. bromine.

Answer:

Explanation:

The density of pure lead is 10.49g/cm³

Given parameters:

Volume of water displaced by the crown = 238.1ml

Mass of crown = 2.50kg

Solution

We would simply find the density of the discovered crown and compare with that of the standardized density of lead.

Density is an intensive property of matter and it is the same for any form of matter. It is amount of substance per unit volume:

               Density = [tex]\frac{mass}{volume}[/tex]

We need to convert the given parameters to standard unit,

                                 1ml = 1cm³

         Therefore, the volume of water displaced is 238.1cm³

Also,

                       1kg  = 1000g

                       2.5kg = 2500g

    mass of the crown is 2500g

Density = [tex]\frac{2500}{238.1}[/tex] = 10.49g/cm³

The crown is made of silver because the density matches with that of pure silver.

Answer:

Qualitative: Physical observations (the sky is blue, the water is boiling, etc.)

Quantitative: Numberical observations (density= 1 g/ml, volume= 14 ft^3, etc.)

Explanation:

The way to remember it is quaLitative is qualities of the object. QuaNtitative is quantities of the object.

Qualitative physical properties describe the quality of matter without numbers, such as color, while quantitative properties involve numbers and units, like a substance's melting point.

Qualitative and quantitative physical properties differ in the way they describe matter. Qualitative physical properties describe the quality of a substance without using numbers. For example, sulfur being yellow is a qualitative description. On the other hand, quantitative physical properties specify the quantity and include numerical values with units, such as a book having 650 pages.

To illustrate these differences, consider the physical property of color. Color is a qualitative property because it describes what we see without measurement. In contrast, melting point is a quantitative property because it provides a specific temperature at which a substance changes from a solid to a liquid, such as ice melting at 0°C.

Answer:

If you walk 2km from your kouse to a store then back nome your displacement is 0km.

Explanation:

Displacement is defined as the distance from your original location. The displacement of the question is 0 because even though you left your house, you came back you your original position. Therefore you are 0km from your original position and have a displacement of 0km.

Your displacement in this case is Zero

Your displacement is the shortest straight-line distance from your initial position to your final position, regardless of the path you took. In this case, you walked 2 km from your house to the store and then walked 2 km back home.

Since you ended up back at your starting point, your final position is the same as your initial position.

Therefore, your displacement is 0 km. Displacement takes into account only the change in position, not the path taken, and since you ended up where you started, there is no net change in position, resulting in a displacement of 0 km.

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Answer:

silver

Explanation:

Silver is a metal at room temperature.

The physical state of matter can help us know which of these substances will be the most dense. Density deals the amount of substances per unit volume.

Solids are packed closely and have a definite and ordered arrangement of their atoms. From the list above only Silver is a solid at room temperature.

Bromine is a liquid at room temperature while chlorine and oxygen are gases at room temperature. Liquids and gases do not have more substances per unit volume compared to solids. Therefore, silver should be the most dense.

Answer:

The answer is silver. Silver is the most dense, it's a solid so it is more compact and is obviously the most likely to have more mass to it. option D

Explanation:

The  matching of each of the following element symbols to its name, atomic mass, or atomic number can be done as;

Sulfur is a chemical element with the atomic number 16 and the symbol S. Sulfur is a solid at ambient temperature and is categorized as a nonmetal.

Tin is a Group 14 (the carbon family) element with mostly metallic characteristics. Tin has an atomic mass of 118.710 atomic mass units and an atomic number of 50.

Tin is the element listed as Sn in the periodic table. Stanum is the latin name of the metal from which Sn is derived.

Se is a group 6 element and is selenium. It is a member of the same group as tellurium, oxygen, and sulfur. The atomic weight of this material is 78.96 g/mol.

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Answer:

C-Its product is heavier than each of its reactants.

Explanation:

Correct equation:

               ¹⁴₇N + ¹₁H → ¹⁵₈O

In the reaction above, we can conclude within the given conditions of the reaction that the product formed is heavier than the reactants.

The product is oxygen with a mass number of 15 as shown by the superscript preceeding the symbol of the atom.

The reactants are:

       Nitrogen, N with a mass number of 14

      Hydrogen, H with a mass number of 1

The mass number is a true reflection of the mass of an atom. It clearly shows the mass of the nucleons which are the most massive particles that makes up an atom. The nucleons are protons and neutrons that makes up the tiny nucleus of the atom.

Oxygen here has more nucleons that each of Nitrogen and Hydrogen.

Answer:

c

Explanation:

Answer:

1 and 5 I'm pretty sure sorry if i'm wrong the rest look like it wouldn't make sense to me

Explanation:

Answer:

Hey! It's 1 and 5!

Explanation:

Answer:4.536 kilograms

Explanation:

for an approximate result, divide the mass value by 2.205

Among the given options, balance is an object which is not utilized in order to hold liquids. Thus, the correct option for this question is C.

The characteristic properties of liquids are as follows:

Objects like flasks, graduated cylinders, and test tubes hold liquid on the basis of their intensity. While balance is an instrument that is used to measure the weight or mass of compounds or substances which is present in solid forms.

Therefore, balance is an object which is not utilized in order to hold liquids. Thus, the correct option for this question is C.

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Answer:

No

Explanation:

Two letters on the top, and two letters on the left. (one letter per square)

Answer:

No, it is not.

Explanation:

To draw a Punnett Square, it can only have 4 letters on 2 sides.

I added an image which is an example.

Answer:

63 mL

Explanation:

To find the amount of mililiters in an amount of liters, we must multiply by the amount of liters by 1000.

0.063 L × 1000 = 63 mL

Answer:

30 The atomic number is the number of protons

Explanation:

Answer:

An uncharged  zinc atom have 30 protons.

Explanation:

Each chemical element is characterized by the number of protons in its nucleus, which is called the atomic number Z. But in the nucleus of each element it is also possible to find neutrons, the number of which can vary. The atomic mass (A) is obtained by adding the number of protons and neutrons of a given nucleus.

In this case, an atom of the element zinc has an atomic number of 30 and a mass number of 65. So, you can know that Z=30 and A=65.  Then, the number of protons is 30.  And knowing that the number of protons plus the number of neutrons is 65, it is possible to say that the number of neutrons is 35.

Finally, an uncharged  zinc atom have 30 protons.

Answer:

Biotic components, or biotic factors, can be described as any living component that affects another organism or shapes the ecosystem. This includes both animals that consume other organisms within their ecosystem, and the organism that is being consumed

Explanation:

also you spelt it wrong

Answer:

3.9602 x 10^2

Explanation:

You would first multiply the two together, making sure to put it in correctly on your calculator. Then that would lead you to " 396.04".

Since scientific notation must be between 1-10 you would move the decimal two spots to the left to make it smaller, then keeping in mind that to get it back where it was you must multiply the 10 by a positive two to bring it back a positive two spots.

After converting to the same units, the sum of 1.26 x 10⁴ kg and 2.5 x 10⁶ g (converted to 2.5 x 10³ kg) is 1.51 x 10⁴ kg, when added using proper scientific notation.

To solve the given problem in scientific notation, we first need to convert all units to kilograms. We are given 1.26 x 10⁴ kg and 2.5 x 10⁶ g. Remember that there are 1000 grams in 1 kilogram, so we must divide the grams by 1000 to convert to kilograms. This means that 2.5 x 10⁶ g is equivalent to 2.5 x 10⁶ g x 10⁻³ kg/g = 2.5 x 10³ kg.

Now, both quantities are in kilograms, so we can add them together:

1.26 x 10⁴ kg + 2.5 x 10³ kg = (1.26 + 0.25) x 10⁴ kg = 1.51 x 10⁴ kg.

Thus, the sum in kilograms, using proper scientific notation, is 1.51 x 10⁴ kg.

Answer:

They are physical changes.

Explanation:

This is because there in no chemical reaction taking place, just a physical change.

A physical change in a change in which the chemical structure of the substance does not change. Ice, water and steam are all the same on a molecular level, thus changing from ice to water or from water to steam are physical changes.

A chemical change is a change in which the chemical structure of the substance undergoes a change, since this does not happen going for A to B or B to C they are not chemical changes.

Answer:

Approximately 5.00 × 10⁸ tons per day. (Rounding error: less than 1.1%.)

Explanation:

How many cubic feet of water flows over this waterfall each day?

The question gives only the number of cubic feet of water that flows over each second. To find the volume for each day, start by finding the number of seconds in a day.

There are 60 seconds in a minute and 60 minutes in an hour. That translates to [tex]60 \times 60[/tex] seconds in an hour.

There are 24 hours in a day. Each hour contains [tex]60 \times 60[/tex] seconds. That means that there are [tex]24 \times 60 \times 60[/tex] seconds in a day.

[tex]2.02 \times 10^{5}[/tex] cubic feet of water flows over this waterfall every second. Therefore, [tex]24 \times 60 \times 60\times 2.02 \times 10^{5}[/tex] cubic feet of water flows over this waterfall every day.

The weight of one cubic foot of water is [tex]62.4[/tex] pounds. The weight of [tex]24 \times 60 \times 60\times 2.02 \times 10^{5}[/tex] of cubic feet of water will be [tex]24 \times 60 \times 60\times 2.02 \times 10^{5}\times 62.4[/tex] pounds.

It takes 2,200 pounds to make a ton.   [tex]24 \times 60 \times 60\times 2.02 \times 10^{5}\times 62.4[/tex] will translate to [tex]\displaystyle \frac{1}{2200}\times 24 \times 60 \times 60\times 2.02 \times 10^{5}\times 62.4[/tex] tons.

To calculate the rounding error, evaluate

[tex]\displaystyle \frac{\text{Rounded Value} - \text{Actual Value}}{\text{Actual Value}}\times 100\%[/tex] and drop the negative sign if there is one. Rounding the final result to [tex]5.00\times 10^{5}[/tex] gives a rounding error of approximately [tex]1.0\%[/tex].

Water flowing over a particular waterfall at a rate of 2.02 x 10⁵ ft³/s is equivalent to 4.95 × 10⁸ ton/day.

First, we will convert 2.02 x 10⁵ ft³/s to ton/s using the following conversion factors:

[tex]\frac{2.02 \times 10^{5} ft^{3} }{s} \times \frac{62.4lb}{1ft^{3} } \times \frac{1ton}{2200lb} = 5.73 \times 10^{3} ton/s[/tex]

Then, we will convert  5.73 × 10³ ton/s to ton/day using the following conversion factors:

[tex]\frac{ 5.73 \times 10^{3} ton}{s} \times \frac{3600s}{1h} \times \frac{24h}{1day} = 4.95 \times 10^{8} ton/day[/tex]

Water flowing over a particular waterfall at a rate of 2.02 x 10⁵ ft³/s is equivalent to 4.95 × 10⁸ ton/day.

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Answer:

26,167.47m

Explanation:

Problem:

We are to solve this problem using dimensional analysis:

  from the given conversion factors-

      0.621mi = 1.00km

       1km = 1000m

From the problem, we are groing from miles to metres:

      16.25mi x [tex]\frac{1km}{0.621mi}[/tex] x [tex]\frac{1000m}{1km}[/tex]

The mi will cancel out and also the km. This leaves us with the desired unit we want which is meters, m.

       =  26,167.47m

Answer:

A. Do some background research

There are 5 steps for the scientific method while doing an experiment

Step 1: make a question

Step 2: research that question

Step 3: Hypothesis

Step 4: Test and collect data

Step 5: Conclusion

Answer:

aaaaaaaaaa

Explanation:

Answer:

yes, ex: iron cobalt and nickel and elements like this are attracted to magnetism

Explanation:

Answer:

Cobalt sulfide

Explanation:

Cobalt sulfide

The name of the compound CoS is Cobalt Sulfide. It consists of one atom of Cobalt (Co) and one atom of Sulfur (S). The name follows standard chemical naming conventions.

The compound CoS refers to a molecule composed of one atom of cobalt (Co) and one atom of sulfur (S). In the naming conventions of chemical compounds, the first element usually retains its standard name, while the second element has its ending changed to '-ide'. Thus, the name of the compound CoS would be 'cobalt sulfide.' It's important to note here that the prefix 'mono-' that is used to denote single atoms is usually omitted, hence we don't say 'monocobalt monosulfide'. To ensure the correctness of the names, strict rules are followed in Chemistry to avoid ambiguity.

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Answer:

Explanation:

Given parameters:

Mass of calcium carbonate = 1.73g

Mass of sodium carbonate = 2.34g

Mass of magnesium sulfate = 1.93g

Unknown:

Percentage of calcium carbonate in the mixture

Solution:

The mixture consists of :

   calcium carbonate + sodium carbonate + magnesium sulfate:

To find the percentage of calcium carbonate, we must first find the mass of the mixture by summing the masses of the different compounds that makes up the mixture:

            Mass of the mixture = 1.73 + 2.34 + 1.93 = 6.00g

Therefore,

percentage of calcium carbonate = [tex]\frac{mass of calcium carbonate}{mass of mixture}[/tex] x 100

Percentage of calcium carbonate = [tex]\frac{1.73}{6}[/tex] x 100 = 28.83%

28.83 % of calcium carbonate is present.

Calcium carbonate [tex]\rm (CaCO_{3})[/tex] is the compound found in aragonite and calcite and is the major element of shells and skeletons. It is also used as a dietary supplement.

Given,

The total mass of the mixture will be:

[tex]\begin{aligned}\rm Mass \;of \;mixture} &= \rm \;mass\; of \;CaCO_{3} + \rm \;mass \;of \;NaCO_{3} + \rm \;mass \;of\; MgSO_{4}\\\\&= 1.73 \rm \;g + 2.34 \rm \;g + 1.93 \rm \;g \\\\&= 6.00 \rm \;g \end{aligned}[/tex]

The percentage of a compound or an element in a mixture can be  calculated as:

[tex]\% \text{of substance} = (\dfrac{\text{mass of substance} }{\text{mass of mixture}}) \times 100[/tex]

Now substitute values in the formula:

[tex]\begin{aligned}\% \text{of substance} &= (\dfrac{\text{1.73 g} }{\text{6.00 g}}) \times 100\\\\&= 28.8 \%\end{aligned}[/tex]

Therefore, 28.83 % of calcium carbonate is present.

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Answer:

An experiment is a research method performed within a completely controlled environment that uses groups of individuals ( subjects), one of which the factors being tested are not spplied on, an independent factor of the hypothesys ( to be tested ), for example the resilience of a group of teenagers) and a dependant factor that is applied to check how it varyes depending on the tested factor ( for example, the most challanging experience of their generation)

Answer:

Infrared radiation

Explanation:

The elecromagnetic spectrum is a group of waves that results from electromagnetic vibrations.

In the spectrum, the frequency of the waves increases as their wavelengths decreases. The spectrum is shown below:

Radio waves  Microwaves Infrared Visible light  Ultraviolet Xrays

Answer:

agree

Explanation: