pls help because im not smart.-.

Answer:

First we isolate y by doing - 3

-y = 10

Explanation:

-10 since 3- (-10) is actually 3 + 10 which is 13

Answer:

ithink it is 9.0

Explanation:

Answer:

Why does D-block start on the fourth row of the periodic table?

Explanation:

The require more energy to reach 3d than 4s, and they fill up 4p before 4d, and so forth. ... The energy is lower for 6s than 4f, and 4f and 5f are lower in energy than the final D level.

Answer:

the periodic table is important because it is organized to provide a alot of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.

Explanation:

Answer:

salt will form bcz when acids reacts with base then it forms salts . and this reaction is called neutralization reaction

Answer  C) 6 × 1023 atom

The number of silver atoms present in one mole of silver is 6.0 × 10²³ atoms. The correct option is C) 6 × 1023 atoms

From the question, we are to determine the number of silver atoms present in one mole of silver.

From the formula,

Number of atoms = Number of moles × Avogadro's constant

Number of atoms = 1 × 6.022 × 10²³

Number of atoms = 6.022 × 10²³

Number of atoms ≅ 6.0 × 10²³ atoms

Hence, the number of silver atoms present in one mole of silver is 6.0 × 10²³ atoms. The correct option is C) 6 × 1023 atoms

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Answer:

The answer I believe is B. Erosion

Explanation:

Just sounds better than all the other choices.

Answer:

erosion b

Explanation:

it breaks down the rocks i remembered this in 4th grade :)

Answer:

Magnetic Forceeeeeeeeeee

Answer:The solution contains 0.50 mol or 55 g of CaCl2 . You know there are 2.0 mol of CaCl2 in 1 L of solution. (40.08 + 2 × 35.45) g=(40.08 + 70.90)

g=110.98 g

Explanation:

My I please have brainliest

110.98 grams of CaCl₂ is there present in 2.0 M CaC₂.

Calcium chloride is made up of calcium and chloride.

Given, that the solution contain 250 mL of 2.0 M CaCl2

You know there are 2.0 mol of CaCl2 in 1 L of solution.

(40.08 + 2 × 35.45) g

= (40.08 + 70.90)

=110.98 g

Thus, 110.98 grams of CaCl₂ is there present in 2.0 M CaC₂.

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Answer:

with the molecular formula C3H5(ONO2)3, has a high nitrogen content (18.5 percent) and contains sufficient oxygen atoms to oxidize the carbon and hydrogen atoms while nitrogen is being liberated, so that it is one of the most powerful explosives known.

Explanation:

NTG reduces preload via venous dilation, and achieves modest afterload reduction via arterial dilation. These effects result in decreased myocardial oxygen demand. In addition, NTG induces coronary vasodilation, thereby increasing oxygen delivery.

The decomposition of nitroglycerin can result in so much more volume than the decomposition of sodium azide nitroglycerin contains a lot of nitrogen (18.5%) and has enough oxygen atoms.

A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, like the cubic metre or litre, or different imperial or US-standard units, including the gallon, quart and cubic inch. Volume and length (cubed) have a symbiotic relationship.

The total volume much a container is usually thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the quantity of fluid (liquid or gas) that the container may hold. The decomposition of nitroglycerin can result in so much more volume than the decomposition of sodium azide nitroglycerin contains a lot of nitrogen (18.5%) and has enough oxygen atoms for the nitrogen to be liberated while also oxidising the hydrogen and carbon atoms.

Therefore, the decomposition of nitroglycerin can result in so much more volume than the decomposition of sodium azide nitroglycerin contains a lot of nitrogen (18.5%) and has enough oxygen atoms.

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Answer: Man Made Resources?

Explanation: Its when humans create their own things.

Answer:

0,1276 M

Explanation:

Molair mass of NaOCl = 74,44 g/mol

You have 9,5 g/L.

You need to calculate with the molair mass, how many moles 9,5 g are:

9,5 g / 74,44 g/mol = 0,1276 mol

0,1276 mol / 1 L = 0,1276 M

The molarity of a bleach solution containing 9.5 g of NaOCL per liter of bleach is mathematically given as

M= 0.1276 M

Generally, the equation for the  Molar mass  is mathematically given as

M=m/(g/mol)

Therefore

M=9,5 g / 74,44 g/mol

M= 0,1276 mol

Hence

M= 0.1276 M

In conclusion, the molarity

M= 0.1276 M

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Answer:

720+450 = 1170 it's 1170

426.32mL (rounded)

The formula for finding V2 is P1 • V1/P2 and since standard pressure (1atm) is equal to 760 P2 would be 760.

720mmHg • (450mL/760mmHg) = 426.32mL

Answer:

. Which one has a greater thermal energy?

the coffee cup

Answer:

Ionic

Explanation:

Answer:

carbon and hydrogen are molecular

Explanation:

Answer: 2 KCIO3(s) + heat —> KCI (s) + 3 O2(g)

Explanation:

8 S

In this case you must start balancing the sulfur to have 8 on each side of the reaction. So:

Answer:

Explanation:

The law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.

Then, you must balance the chemical equation. For that, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts.  

The coefficients located in front of each molecule indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts.

By multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction.

Then, taking into account all of the above, you can determine the amount of elements on each side of the equation:

Left side: 2 H and 1 S

Right side: 2 H and 8 S

In this case you must start balancing the sulfur to have 8 on each side of the reaction. So:

8 H₂S → H₂ + S₈

Now the amount of elements on each side of the equation:

Left side: 16 H and 8  

Right side: 2 H and 8 S

Now you need to start balancing the hydrogen to get the same amount from each side of the reaction. So:

8 H₂S → 8 H₂ + S₈

Now the amount of elements on each side of the equation:

Left side: 16 H and 8  

Right side: 16 H and 8 S

The balanced reaction is:

8 H₂S → 8 H₂ + S₈

Answer:

Single Replacement

Given

Reaction

Mg(s) + 2 HCl(aq) → MgCl2 (aq) + H2 (g)

Required

Type of reaction

Solution

A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds

General formula :

A + BC ⇒ AC + B

Not all of these reactions can occur. We can use the activity series(the Volta series)

The more left the position of a metal in the series, the more reactive metal (easy to release electrons, the stronger the reductor)

Answer:

calcium chloride and water

Explanation:

the reaction absorbed energy which means endothermic

Answer:

4.47 x 10²² atoms

Explanation:

Given parameters:

Mass of Bismuth  = 15.5g

Unknown:

Number of atoms  = ?

Solution:

To find the number atoms, first solve for the number of moles in this element first.

  Number of moles  = [tex]\frac{mass}{molar mass}[/tex]    

  Number of moles  = [tex]\frac{15.5}{209}[/tex]    = 0.074mole

So:

        1 mole of a substance contains 6.02 x 10²³ atoms

     0.074 mole of Bismuth will contain 0.074 x 6.02 x 10²³ atoms

                                                          = 4.47 x 10²² atoms

Answer:

mental model is an explanation of someone's thought process about how something works in the real world. It is a representation of the surrounding world, the relationships between its various parts and a person's intuitive perception about his or her own acts and their consequences. Mental models can help shape behaviour and set an approach to solving problems (similar to a personal algorithm) and doing tasks.

:)

Answer:

false

Explanation:

because if one of the p-protein of one is less then then the eyecolor will be different

Answer:

YESSIR

Explanation:

Answer: C2Br6

Explanation:

Answer:

something that triggers

Explanation:

a catalyst helps move a reaction along

A catalyst shows some specificity in its action. It speeds up only a spontaneous reaction. The best definition of catalyst is something that triggers. The correct option is C.

A substance which increases the rate of a chemical reaction without itself undergoing any permanent change chemically or quantitatively is defined as the catalyst and the phenomenon is called catalysis.

It is believed that a catalyst actually participates in the chemical reaction that is speeds up. It forms temporary bonds with the reactants yielding an intermediate activated complex.

A typical example of catalyst is iron (Fe) which is used in the Haber process for the manufacture of ammonia. The catalyst is recovered unchanged in amount and chemical composition at the end of the reaction.

In most cases, a small amount of a catalyst can speed up reaction between large amounts of reactants. A catalyst shows maximum efficiency at optimum temperature.

Thus the correct option is C.

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Answer: the answer is d

Explanation:

Decane + Dioxygen = Carbon Dioxide + Water

Reaction Type

Combustion