CHEMISTRY COLLEGE

1. How do you determine how many protons are in a neutral element?

Answers

Answer 1
Answer:

Answer:

The number of protons in an atom is always equal to the atomic number.

Explanation:

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In their elemental forms, the halogens are Select one: a. strong oxidizing agents. b. strong reducing agents. c. strong acids. d. strong bases. e. amphoteric.
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An isotope contains 26 protons, 24 electrons, and 32 neutrons. What is the identity of the isotope

How do you fight off ADHD medication

Answers

Answer:A medication break can ease side effects. A lack of appetite, weight loss, sleep troubles, headaches, and stomach pain are common side effects of ADHD medication.

Explanation: It may boost your child’s growth. Some ADHD medications can slow a child’s growth in height, especially during the first 2 years of taking it. While height delays are temporary and kids typically catch up later, going off medication may lead to fewer growth delays.

It won’t hurt your child. Taking a child off ADHD medication may cause their ADHD symptoms to reappear. But it won’t make them sick or cause other side effects.

Using her new telescope Ashley discovers a spherical meteor passing between the earth and the moon and measures it’s radius as 3 kilometers how many cubic kilometers are in the meteor

Answers

Answer:

113 km³

Explanation:

Step 1: Given data

Radius of the meteor (r): 3 km

Step 2: Calculate the volume (V) of the meteor

The meteor is spherical. Given the radius (r), we can calculate the volume of a sphere using the following expression.

V = 4/3 × π × r³

V = 4/3 × π × (3 km)³

V = 4/3 × π × 27 km³

V = 113 km³

The volume of the meteor is 113 km³.

An organic compound was extracted into dichloromethane and then the aqueous layer is shaken with saturated sodium chloride solution. What is the purpose of the sodium chloride? A. to decrease the solubility of the organic product in water B. to raise the density of the aqueous layer so that it will be the bottom layer C. to lower the boiling point of the water to cause the water D. to be immiscible with the methylene chloride

Answers

Answer: option A. to decrease the solubility of the organic product in water

Explanation: sodium chloride solution act as a drying agent to remove water from an organic compound that is in solution. The salt water works to pull the water from the organic layer to the water layer,therby decreasing

Atomic weight of gold is 197.2 ami
Calculate no of gram atoms in 7.5g of gold

Answers

the atomic weight is numerically equivalent to the molar mass.
therefore molar mass of gold is - 197.2 g/mol
avagadros number states that 1 mol of any substance is made of 6.022 x 10²³ units. These units could be atoms making up elements or molecules making up compounds. 
1 mol of gold is made of 6.022 x 10²³  atoms of gold
since 1 mol weighs 197.2 g 
therefore if 197.2 g of gold contains - 6.022 x 10²³  atoms of gold
then 7.5 g contains - 6.022 x 10²³  x 7.5/ 197.2 = 2.29 x 10²² atoms of gold 
answer is 2.29 x 10²² atoms of gold

Identify when an object has a kinetic energy of zero joules.Question 2 options:


A. as a pendulum swings downward.


B. when the energy has been destroyed.


C. just after a ball it leaves your hand pitching a ball.


D. when an object is no longer in motion.

Answers

Answer:

D I think

Explanation:

cuz 0 j means there is nothing moving

Answer:

D. when an object is no longer in motion.

Explanation:

What is the mass of silver chlorate (191.32 g/mol) that decomposes to release 0.466L of oxygen gas at STP? AgC1036) _AgCl). _026) A) 1.33g B) 597 E) 7.968 C) 3.988 D) 2658

Answers

Answer : The mass of silver chlorate will be 2.654 grams.

Explanation :

The balanced chemical reaction is,

2AgClO_3\rightarrow 2AgCl+3O_2

First we have to calculate the moles of oxygen gas at STP.

As, 22.4 L volume of oxygen gas present in 1 mole of oxygen gas

So, 0.466 L volume of oxygen gas present in (0.466)/(22.4)=0.0208 mole of oxygen gas

Now we have to calculate the moles of silver chlorate.

From the balanced chemical reaction, we conclude that

As, 3 moles of oxygen produced from 2 moles of silver chlorate

So, 0.0208 moles of oxygen produced from (2)/(3)* 0.0208=0.01387 moles of silver chlorate

Now we have to calculate the mass of silver chlorate.

\text{Mass of }AgClO_3=\text{Moles of }AgClO_3* \text{Molar mass of }AgClO_3

Molar mass of silver chlorate = 191.32 g/mole

\text{Mass of }AgClO_3=0.01387mole* 191.32g/mole=2.654g

Therefore, the mass of silver chlorate will be 2.654 grams.
Other Questions
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Describe the environmental impacts that are involved during the design, research and development, and marketing phases of cell phones.
Consider the following reaction at equilibrium. What effect will adding 1.4 mole of He to the reaction mixture have on the system? 2 H2S(g) + 3 O2(g) ⇌ 2 H2O(g) + 2 SO2(g) Consider the following reaction at equilibrium. What effect will adding 1.4 mole of He to the reaction mixture have on the system? 2 H2S(g) + 3 O2(g) ⇌ 2 H2O(g) + 2 SO2(g) The reaction will shift to the left in the direction of reactants. No effect will be observed. The reaction will shift to the right in the direction of products. The equilibrium constant will increase. The equilibrium constant will decrease.
Calculate the partial pressure of each gas and the total pressure if the temperature of the gas is 21 ∘C∘C. Express the pressures in atmospheres to three significant digits separated by commas.