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Answer:

We can make 10 percent solution by volume or by mass. A 10% of NaCl solution by mass has ten grams of sodium chloride dissolved in 100 ml of solution. Weigh 10g of sodium chloride. Pour it into a graduated cylinder or volumetric flask containing about 80ml of water.

Explanation:

have a good day

Answer:

powder has more surface area than a ribbon since each grain also has its own "spherical" surface area compared to a magnesium ribbon where you can only see the top and bottom of the grains as a collective

Answer:

792.72g/L

Explanation:

density formula

density = mass/volume in L

so the density of acetone = 43.6/0.055

792.72g/L

Answer:

so 43.6g devided by 55.0ml and your density of acetone is 0.79g/ml.

Answer:

Vanadium (V), Niobium (Niobium), Tantalum (Ta), Dubnium (Db), Cerium (Ce), and Thorium (Th)

Explanation:

Groups go vertical (up and down) on the periodic table.

Periods go horizontal (left to right) on the period table.

Answer:

D

Explanation:

The statement that best explains why the table is incorrect is: Grass is a soluble substance. Option C is correct.

In the table, grass is listed under "Insoluble," but in reality, grass is not a substance that dissolves in water. It is a complex mixture of various compounds, including cellulose and other organic materials, which are not water-soluble. Grass does not dissolve when added to water; instead, it remains intact and is not readily soluble.

On the other hand, all the other substances listed in the table are correctly categorized. Sugar, food coloring, and honey are soluble substances because they dissolve in water. Sand and salt are insoluble substances because they do not dissolve in water.

Hence, C. is the correct option.

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Answer:

umm translate

Explanation:

The first atomic bomb was tested July 16th, 1945

210 Miles away south of Los Alamos in New Mexico in the barren plains of Alamogordo Bombing Range

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Answer:

add 2 extra electrons

Explanation:

This is because -2 means 2 electrons are gained while +2 means it lost two electrons.

If an ion has a charge of -2, you have to add two extra electrons to its Lewis structure.

The Lewis structure of a compound is a structure that shows the arrangement of electrons in the outermost or valence shell of an atom.

An ion is formed by adding or removing electrons from a specie. The magnitude of the resulting charge depends on the number of electrons added or removed from the specie.

To form a negative charge of magnitude -2, I have to add two electrons to the Lewis structure of the specie.

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Answer:

it wants you to conclude what you have learned by writing if you think there is a  link between the impact and the extinction of the dinosaurs by stateing any  similarities to the two events and provide evidence to surpport your claim  

Explanation:

Answer:

The answer is Aluminium.

Explanation:

It has low density, is non-toxic, has a high thermal conductivity, has excellent corrosion resistance and can be easily cast, machined and formed. It is also non-magnetic and non-sparking. It is the second most malleable metal and the sixth most ductile.

Answer:

It is the total distance traveled over the total time .

Answer:

D

Explanation:

Explanation: The urea cycle (also known as the ornithine cycle) is a cycle of biochemical reactions that produces urea (NH 2) 2 CO from ammonia (NH 3). This cycle occurs in ureotelic organisms. The urea cycle converts highly toxic ammonia to urea for excretion.

Answer:

We need to separate different components of a mixture to separate the useful components from the non-useful or some harmful components.

Examples:

(a) Tea leaves are separated from tea.

(b) Pebbles are separated form rice and pulse.

Explanation:

The mixtures are separated into their components for the following reasons:

1. To remove an undesirable component - Tea is made by boiling tea leaves in water and then adding milk and sugar. After the tea has been made, the used tea leaves become the undesirable component of the mixture 'tea' and are removed from it by using a tea strainer.

2. To remove a harmful component - Foodgrains like rice, wheat, pulses etc. usually contain small pieces of stones and some insects etc. These are harmful to us and are hence removed from the foodgrains before using them.

3. To obtain a pure sample of a substance - Tap water contains some dissolved salts in it so it is an impure mixture. This water is made free of dissolved salts or impurities by the process of distillation and as a result, we get a pure sample of water.

4. To obtain a useful component - Milk is a mixture from which useful component 'butter' is separated.

Answer:

May i ask what is the question?

Explanation:

Answer:

D. one red straw and one green straw.

Which example is a liquid at room temperature?

answer : bromine.

Answer:

bromine is liquid at room temperature ️....

The balanced chemical reaction of gaseous tricarbon octahydride with oxygen gas produces gaseous carbon dioxide and water vapor is as follows: C3H8 + 5O2 → 3CO2 + 4H2O

BALANCED CHEMICAL EQUATION:

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Answer:

a.MgO

b.CaO

c.SO2

d.Na2O

e.CO2

Answer:

H2(g) + MgCl2 (aq)

Explanation:

Answer:

About 4.79 moles of oxygen.

Explanation:

We want to determine the amount of moles of oxygen are present in 0.798 moles of Mg(IO₃)₂.

From the chemical formula, we can see that there are six atoms of oxygen for every molecule of Mg(IO₃)₂. Therefore, we can say that there are six moles of oxygen for every mole of Mg(IO₃)₂. This yields the following ratio:

[tex]\displaystyle \frac{6\text{ mol O}}{1 \text{ mol Mg(IO$_3$)$_2$}}[/tex]

Multiplying this by the initial value yields:

[tex]\displaystyle 0.798 \text{ mol Mg(IO$_3$)$_2$} \cdot \displaystyle \frac{6\text{ mol O}}{1 \text{ mol Mg(IO$_3$)$_2$}} = 4.79 \text{ mol O}[/tex]

In conclusion, there are about 4.79 moles of oxygen present in 0.798 moles of Mg(IO₃)₂.

The masses conservation law allows us to find that the answer for which the quantity of product is less than are:

One of the great conservation laws of science is the conservation of mass, therefore the initial mass is equal to the final mass, even in nuclear reactions where part of the mass is converted into energy, if it is taken into account mass and energy this mass-energy relationship is conserved.

In a chemical reaction the constituents mix and form new compounds, in an ideal case all the material of the constituents must react, but in real cases there is some part of the reactants that does not react in the required direction, therefore the amount of product is less than expected.

When adding the moles of the refractants and comparing with the moles of the product and the unreacted or reacted material in other products should be the same.

The fact that there is less product than expected in a reaction is due to the existence of other competitive reactions.

Consequently using the masses conservation law we can find that the quantity of products is less than expected are:  

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Answer:

Ni

Explanation:

Electronic configuration given by

[tex]\\ \sf\longmapsto 1s^22s^22p^63s^23p^64s^23d^8[/tex]

Element is nickel

One mole of every substance contains 6.022×10²³ number of atoms. One mole carbon have these much atoms and thus number of moles of carbon having 8.7 × 10²³ atoms is 1.44 moles.

Carbon is 6th element in periodic table. It is a p block element and is a non-metal. Carbon forms covalent bonds with other elements.

One mole of every elements contains 6.022×10²³ number of atoms and it is called Avogadro number. Similarly one mole of a compound contains 6.022×10²³ number of molecules.

The number of atoms in one mole of carbon is 6.022×10²³.Therefore, number of moles of carbon which contains 8.7 × 10²³ atoms is calculated as follows:

number of moles of carbon = 8.7 × 10²³/6.022×10²³

                                              = 1.44 moles.

Therefore, the number of moles of carbon containing 8.7 × 10²³ atoms is 1.44 moles.

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