Which statement describes the periodic table?

ANSWER 10 MOLES OF CARBON DIOXIDE

2C0 + O2 → 2CO2

2 moles of carbon monoxide forming 2 moles of carbon dioxide

10 moles of carbon monoxide will form 10 moles of carbon dioxide

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The answer is A; tundra is at a higher latitude than a desert

Explanation:

Both a tundra and a desert are very dry, so that eliminates B and C.

And as for D, Tundra receives more rain than a desert does, so that eliminates D.

Answer:

Mass of copper in 200 g bronze is 120 g.

Explanation:

If it is known that bronze is formed with 60% copper and 40% tin, what will be the mass of copper contained in 200 grams of bronze?

Percentage of copper in bronze = 60 %

Percentage of tin in bronze = 40 %

Mass of bronze  = 200 grams

Mass of copper in bronze = 60 % of 200 g

= 0.6 x 200 = 120 grams

Mass of copper in 200 g bronze is 120 g.  

Answer: A & D

Explanation:

The two main forces are temperature and salinity.

Answer:

0.025 liters

Explanation:

divide 25 into 1000

Answer:

25 mL = 0.025 L

Explanation:

edge 2023

Answer:

dragon fly larvae, beetles, fish, pelican

Explanation:

Answer:

You right!

Explanation:

Answer: Yes your right

Answer:

The forum user pointed out that energy began transferring into the lake as ... How can you use the information from the Sim to respond to the blogger

Explanation:

Answer

b b b b b b b b b b b b b b b

Explanation:

Answer:

118 elements have been discovered so far

Explanation:

Answer: exothermic

Explanation: chemical reactions that release energy is called exothermic, and in this case, more energy is being released. (I THINK)

The reaction shown in the picture is exothermic reaction.

The exothermic reaction leads to the release of energy. This energy is often higher than the combined energy of the reactants.

It can be understood that the net amount of energy required to initiate an exothermic reaction is less than the net amount of energy released by the reaction. When a calorimeter, a device used to measure the heat released by a chemical reaction, the net amount of heat energy that flows through the device is equal to the negative of the total energy change of the system.

In the picture, first reactants had high energy and after the formation of the product the energy decreases.

The nuclear fission of one atom of uranium-235 releases more than 2.5 million times the energy that is produced from the combustion of coal.

The fission of one atom can cause a chain reaction in which the neutron from the fission of one uranium-235 atom can strike another atom, leading to its nuclear fission.

Therefore, The reaction shown in the picture is exothermic reaction.

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Answer: Percent yield represents the ratio between what is experimentally obtained and what is theoretically calculated, multiplied by 100%.

% yield

=

actual yield

theoretical yield

⋅

100

%

So, let's say you want to do an experiment in the lab. You want to measure how much water is produced when 12.0 g of glucose (

C

6

H

12

O

6

) is burned with enough oxygen.

C

6

H

12

O

6

+

6

O

2

→

6

C

O

2

+

6

H

2

O

Since you have a

1

:

6

mole ratio between glucose and water, you can determine how much water you would get by

12.0

g glucose

⋅

1 mole glucose

180.0 g

⋅

6 moles of water

1 mole glucose

⋅

18.0 g

1 mole water

=

7.20

g

This represents your theoretical yield. If the percent yield is 100%, the actual yield will be equal to the theoretical yield. However, after you do the experiment you discover that only 6.50 g of water were produced.

Since less than what was calculated was actually produced, it means that the reaction's percent yield must be smaller than 100%. This is confirmed by

% yield

=

6.50 g

7.20 g

⋅

100

%

=

90.3

%

You can backtrack from here and find out how much glucose reacted

65.0 g of water

⋅

1 mole

18.0 g

⋅

1 mole glucose

6 moles water

⋅

180.0 g

1 mole glucose

=

10.8

g

So not all the glucose reacted, which means that oxygen was not sufficient for the reaction - it acted as a limiting reagent.

Explanation:

Answer:

let me know if it is right:)

and I hope it make sense

Answer:

convection within Earth’s interior

Explanation:

Complete question

Name this event

Solution

During the convection within Earth’s interior , the earth's core undergo convection leading to turbulent dynamic that further leads to changing of magnetic field.

Due to movement of core material, there is interaction between the  mantle convection and plate motions.

Answer: Oxygen is a gas at room temperature.

Answer:

Yes it is reduced because ocl is the reducing agent

Answer:

A

Explanation:

because number of particle = moles × 6.02 × 10^23

which gives the answer as an A

2.41x10²⁴ molecules are in 4 moles of carbon monoxide (CO). Therefore, the correct option is option A.

The smallest recognizable unit into that a pure substance may be divided while retaining its composition as well as chemical properties is a molecule, which is a collection of atoms that are at least two in number. Until parts made up of a single molecule are reached, the division of an example of a substance smaller progressively smaller parts does not result in a change with regard to its composition nor its chemical properties.

Still smaller sections of the substance are produced by further subdivision, and these components are always different chemically and typically have different compositions from the initial substance. The chemical links that link the atoms in the molecule together are severed during this final step of fragmentation.

molecules =  moles × 6.022×10²³

                  = 2.41x10²⁴  

Therefore, the correct option is option A.

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Answer:

"Francium"

Explanation:

"Francium" is a chemical element with the symbol "Fr" and the atomic number "87". Classified as an "alkali metal", Francium is a solid at room temperature.

Atomic Mass: "223.01973u"

Year Discovered: "1939"

Answer:

2.05 x 10²⁴ molecules

Explanation:

The balanced equation for the chemical reaction is the following:

2 HCl + Mg → MgCl₂ + H₂

According to the equation, 2 moles of HCl are required to react with 1 mol of magnesium (Mg), so the moles of HCl required to react with 1.7 mol Mg are calculated as follows:

moles HCl = 1.7 mol Mg x 2 mol HCl/mol Mg = 3.4 mol HCl

We know that 1 mol of any compound is equal to 6.022 x 10²³ molecular entities, so we convert the moles of HCl to molecules as follows:

molecules HCl = 3.4 mol HCl x 6.022 x 10²³ molecules/1 mol = 2.05 x 10²⁴ molecules

Answer:

The name of the reaction was coined after Alexander William Williamson developed it in 1850.Williamson Ether Synthesis is a reaction that uses deprotonated alcohol and an organohalide to form an ether. 1. Williamson Ether Synthesis usually takes place as an SN2 reaction of a primary alkyl halide with an alkoxide ion.

Explanation:

yeah

Answer:

To get the molarity we need to divide the number of moles of NaCl by the volume of the solution. So, 0.32 moles NaCl divided by 3.4 L, and that gives 0.094 M NaCl.

umm how do you begin answering that ??

Answer:

strong acid

Explanation:

Answer:

[HBr] = 0.0910 M

Explanation:

NaOH → Strong base

HBr → Strong acid.

This is a titration that involves a strong acid and a strong base, so the recaction is about acid base equilibrium.

Formula for titration in the equivalence point is:

mmoles of acid = mmoles of base

M . Volume of acid = M . volume of base

We replace data:

M . 36.60 mL = 0.150 M . 22.20 mL

M = (0.150 M . 22.20 mL) / 36.60 mL

M = 0.0910 mol/L

Answer:

Raise awareness of the dangers of harmful traditions. ...

Tackle violence against girls in school. ...

Challenge and speak out about violence in the home. ...

Transform attitudes towards harmful practices at multiple levels. ...

Listen to girls' experiences of violence - and their solutions.

Answer:

The development of modern atomic theory revealed much about the inner structure of atoms. It was learned that an atom contains a very small nucleus composed of positively charged protons and uncharged neutrons, surrounded by a much larger volume of space containing negatively charged electrons. The nucleus contains the majority of an atom’s mass because protons and neutrons are much heavier than electrons, whereas electrons occupy almost all of an atom’s volume. The diameter of an atom is on the order of 10−10 m, whereas the diameter of the nucleus is roughly 10−15 m—about 100,000 times smaller. For a perspective about their relative sizes, consider this: If the nucleus were the size of a blueberry, the atom would be about the size of a football stadium (Figure 1).

Figure 1. If an atom could be expanded to the size of a football stadium, the nucleus would be the size of a single blueberry. (credit middle: modification of work by “babyknight”/Wikimedia Commons; credit right: modification of work by Paxson Woelber)

Atoms—and the protons, neutrons, and electrons that compose them—are extremely small. For example, a carbon atom weighs less than 2 × 10−23 g, and an electron has a charge of less than 2 × 10−19 C (coulomb). When describing the properties of tiny objects such as atoms, we use appropriately small units of measure, such as the atomic mass unit (amu) and the fundamental unit of charge (e). The amu was originally defined based on hydrogen, the lightest element, then later in terms of oxygen. Since 1961, it has been defined with regard to the most abundant isotope of carbon, atoms of which are assigned masses of exactly 12 amu. (This isotope is known as “carbon-12” as will be discussed later in this module.) Thus, one amu is exactly 112112 of the mass of one carbon-12 atom: 1 amu = 1.6605 × 10−24 g. (The Dalton (Da) and the unified atomic mass unit (u) are alternative units that are equivalent to the amu.) The fundamental unit of charge (also called the elementary charge) equals the magnitude of the charge of an electron (e) with e = 1.602 × 10−19 C.

A proton has a mass of 1.0073 amu and a charge of 1+. A neutron is a slightly heavier particle with a mass 1.0087 amu and a charge of zero; as its name suggests, it is neutral. The electron has a charge of 1− and is a much lighter particle with a mass of about 0.00055 amu (it would take about 1800 electrons to equal the mass of one proton. The properties of these fundamental particles are summarized in Table 3. (An observant student might notice that the sum of an atom’s subatomic particles does not equal the atom’s actual mass: The total mass of six protons, six neutrons, and six electrons is 12.0993 amu, slightly larger than 12.00 amu. This “missing” mass is known as the mass defect, and you will learn about it in the chapter on nuclear chemistry.)

Answer:

Potassium carbonate is soluble in water, while calcium carbonate is insoluble. Weigh a sample of the unknown mixture accurately and stir the sample with water. Filter the suspension and find out the mass of the residue collected. It gives the amount of insoluble calcium carbonate present in the mixture.

Explanation: