help please ill do anything really!!!!!!!

Answer:

htyiu

Explanation:

Answer:

7.50 and 50L

35atm

6.2atm

Answer:

HClO4 + KOH → KClO4 + H2O

Explanation:

Answer:

HCIO4 + KOH → KCIO4 + H2O

Explanation:

nailed it

Answer:

A type of an atom which has a different number of neutrons but the same atomic number, therefore making it the same element. This atom would still have the same properties as well. (Ex: Vanadium-51 is an isotope of Vanadium that has 51 neutrons but still has 23 protons, as its atomic number is 23.)

Isotopes are variants of an element that have the same number of protons in their atomic nucleus, identifying them as the same chemical element, but differ in the number of neutrons.

The variations in neutron numbers among isotopes lead to differences in their atomic masses, resulting in isotopes having slightly different physical properties while retaining similar chemical behavior.

For example, in the case of boron, the two isotopes listed may have the same number of protons (5), but one has 6 neutrons, and the other has 7 neutrons, leading to slightly different atomic masses.

Similarly, for carbon and oxygen, the isotopes exhibit variations in neutron numbers while maintaining the same number of protons, defining them as isotopes of the respective elements. Isotopes play a crucial role in various scientific fields, including radiometric dating, nuclear energy, and medical imaging.

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Answer:

0.123 mol

Explanation:

1 mol Na/22.99g na=0.123 mol

Answer:

[tex]\boxed {\boxed {\sf 0.261 \ mol \ B}}[/tex]

Explanation:

We are asked to find the number of moles in a sample of 2.82 grams of boron.

We convert grams to moles using the molar mass or the mass of 1 mole of a substance. These values are found on the Periodic Table. They are equivalent to the atomic masses, but the units are grams per mole instead of atomic mass units.

Look up the molar mass of boron (B).

Convert using dimensional analysis. Set up a conversion factor using the molar mass.

[tex]\frac {10.81 \ g \ B}{ 1 \ mol \ B}[/tex]

We are converting 2.82 grams of boron to moles, so we multiply by this value.

[tex]2.82 \ g \ B *\frac {10.81 \ g \ B}{ 1 \ mol \ B}[/tex]

Flip the ratio so the units of grams of boron cancel.

[tex]2.82 \ g \ B *\frac { 1 \ mol \ B}{10.81 \ g \ B}[/tex]

[tex]2.82*\frac { 1 \ mol \ B}{10.81}[/tex]

[tex]\frac {2.82}{10.81} \ mol \ B[/tex]

[tex]0.2608695652 \ mol \ B[/tex]

The original value of grams has 3 significant figures, so our answer must have the same. For the number we found, this is the thousandth place. The 8 in the ten-thousandth place tells us to round the 0 up to a 1.

[tex]0.261 \ mol \ B[/tex]

There are approximately 0.261 moles of boron (B)in 2.82 grams of boron.

Answer:

yes, in certain cases

there are different types of bondings between atoms

and in some they lend electrons to make their atom stable this type of bonding is called ionic bonding

and in covalent bond the atoms share their electrons

Answer:B

Explanation:As the water heats up the particles will speed up hitting and colliding with each other which makes the water hot

Answer:

A.

B. the speed of the particles will increase because the thermal energy of the water in the beaker increases

B.

B. the water particles got smaller and now take up less space

Answer:

ssihh add then htit da

Explanation:

Answer:13hct

Explanation:

Answer:

it's kcl

Explanation:

the kcl should be salt

Answer:

1) 37100000

2) 330000000

Explanation:

1) 3.7 x 10^7 = 37100000

2) 3.30 x 10^8 = 330000000

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Answer:

B

Explanation:

equilibrium happens when two things are in complete balance and thermal is in reference to heat so two things are in thermal equilibrium once they have the same temperature.

The option which indicates that two objects are in thermal equilibrium is the objects that have the same temperature. Thus, the correct option for this question is B.

Thermal equilibrium may be defined as a state of a system in which all the parts of the system occupy the same temperature. Two or more objects are in thermal equilibrium if there is no net flow of thermal energy or heat between them when they are considerably connected by a path permeable to heat.

The mechanism of thermal equilibrium occurs when a cup of hot coffee is put on the table and after a short period of time, the temperature of the coffee is the same as the surrounding temperature. So, this represents an example of thermal equilibrium.

Therefore, the correct option for this question is B.

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The dissolution of a substance in another is a kind of chemical reaction.0.4575 g of saccharine is present in the ten tablets of saccharine dissolved in water.

From the information in the question, the sulfur in saccharin (C7H5NO3S) was completely converted to sulfate ion (SO4^2-). This ion was now reacted with excess  barium chloride to form barium sulfate BaSO4. This later reaction occurs as follows;

SO4^2-(aq) + Ba^2+(aq) --------> BaSO4(s)

Number of moles of BaSO4 obtained = 0.5240 g/233 g/mol

= 0.0025 moles

Since the reaction is 1:1, 0.0025 moles of sulfate ions from saccharine reacted.

Molar mass of saccharine = 7(12) + 5(1) + 14 + 3(16) + 32

= 84 + 5 + 14 + 48 + 32 = 183 g/mol

Mass of saccharine in the tablet = 0.0025 moles × 183 g/mol

= 0.4575 g

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Answer:

The Lewis structure for XeF4 has a total of 36 valence electrons. When we are done adding valence electrons we check each atom to see if it has an octet (full outer shell). We also need to check to make sure we only used the number of available valence electrons we calculated earlier (no more, no less).

Explanation:

Answer:

sodium

Explanation:

sodium is an element with the atomic no. of 11 and atomic mass of approximately 23

Answer:

71847284737283774737373737

Answer:

1.chemical change 2, when two chemicals are mixed they have mix two chemcials into one liquid

Explanation:

Answer:

A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds.

Answer:

b

Explanation:

i just had the same question

Answer:

It emits energy since to move from a higher energy level to a lower energy level or ground state, it must lose energy.

Answer:

huwattt

Explanation:

i can't understand

Answer:

1 Density- degree of consistency measured by the quantity of mass per unit volume.

2 Cubic centimeters

3  Volume- Volume is the amount of space occupied by a substance, while mass is the amount of matter it contains. The amount of mass per unit of volume is a sample's density.

4 Liters

5 Mass- Scientific Definition of Mass Mass is the quantity of inertia (resistance to acceleration) possessed by an object or the proportion between force and acceleration referred to in Newton's Second Law of Motion (force equals mass times acceleration). In other words, the more mass an object has, the more force it takes to get it moving.

Explanation:

Answer:

What is density? The measure of how much matter is in a certain volume.

Which one of these are not a unit of volume? Answer: m² is not a unit of volume.

What is Volume? The length of an object.

Which of these is not a unit of mass? Metric ton (t)

What is mass?A measure of the amount of matter in an object or substance.

Answer:

Light waves come in a continuous variety of sizes, frequencies and energies, a continuum known as the electromagnetic spectrum. Once Maxwell introduced the concept of electromagnetic waves, everything clicked into place.

Explanation:

Hope this helps:)

~Kisame'sAbs

Answer:

Butanoic acid and 2-propanol reacts to form isopropyl butyrate.

Explanation:

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Answer:

vc

Explanation:

cvcv

toward, more

away from, less

Explanation:

When the northern hemisphere is tilted toward the sun, the sunlight is more direct than it is in the southern hemisphere. This explains why it's wintertime in Australia while at the same time, it's summertime in the US.

When the northern hemisphere is tilted away from the sun, the sunlight is less direct than it is in the southern hemisphere. This explains why it's summertime in Australia while it's wintertime in the US.

Answer:

O2C

Explanation:

Answer:

Carbon Monoxide (CO) is a colorless, odorless, tasteless, toxic gas that has the molecular formula CO. The molecule consists of a carbon atom that is triply bonded to an oxygen atom. ... The linear molecule consists of a carbon atom that is doubly bonded to two oxygen atoms, O=C=O

Explanation:

Answer:

The controlled variable of an experiment is the one thing that stays the same in an experiment.

Explanation:

An example would be : if I have two pennies, both dunked in water, but than I change one to be dunked in vinegar, the one dunked in water still is the constant or the controlled variable.