Is americium a solid, liquid or gas

Answers

Answer 1

Answer: Americium at standard temperature and pressure is solid. This element is a radioactive one and is a member of the actinide group. It was first produced by the group of Glenn T. Seaborg. It common application is in household smoke detectors.

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Which hydrocarbons are present in styrene?a) alkene
b) alkyne
c) none of the above?

Answers

Option a: alkene

Styren is C6H5CH=CH2, i.e. ethenylbenzene

Which one of the following chemicals does the body generate during regular exercise? A. Adrenaline
B. Estrogen
C. Endorphins
D. Sodium chloride

Answers

The answer is actually C. endorphins. during regular exercise, the pituitary gland and central nervous system produce endorphins

Unknown element X combines with oxygen to form the compound XO2. If 44.0 grams of element X combines with 8.00 grams of oxygen, what is the atomic mass of element X?A. 16 amu
B. 44 amu
C. 88 amu
D. 176 amu
E. 352 amu

Answers

Oxygen has a Mr of 16 and half of 16 is 8 which is how many grams used. If 44 grams of X is used it must have an amu of 88. (Times 2)

How many moles of water (H2O) would be produced if 10 moles of O2 gas reacted completely with excess H2 gas?2 H2(g) + O2(g) → 2 H2O(g)

A. 5
B. 10
C. 20
D. 30

Answers

Answer:

C. 20

Explanation:

Use the equation to know that 1 mol of O2 is equal to 2 mol H2O.

Now you will start with the data, this is 10 mol O2 and you obtain:

10 mol O2 x 2 mol H2O = 20 mol H2O

1 mol O2

2 H2(g) + O2(g) → 2 H2O(g)

according to the reaction:
1 mole of O2-----------------2 moles of H2O
10 moles of O2--------------------- x
x = 20 mole of H2O

answer: C

This physiological event occurs to increase heat loss through the skin during Thermoregulation (a) Superficial Vasoconstriction (b) Decreased Sebaceous (c) Increased Sebaceous Gland Activity (d) Superficial Vasodilation

Answers

the only way i could see the difference

Mark's uncle is about to have a procedure to treat his prostate cancer. The treatment involves placement of smallpellets close to the tumor to deliver a localized dose of radiation. What type of nuclear therapy is this?

a. external beam radiation
b. brachytherapy
c. radiopharmaceuticals
d. internal X-rays

Answers

Answer: b. Brachytherapy

Explanation:

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If you make a solution that has a H+ concentration of 0.075, whatwill the pH of the solution be?

Several steps are involved in the industrial production of sulfuric acid. One step involves the oxidation of sulfur dioxide gas to form sulfur trioxide gas. A catalyst is used to increase the rate of production of sulfur trioxide gas. In a rigid cylinder with a movable piston, this reaction reaches equilibrium, as represented by the equation below.2SO2(g) + O2(g) <==> 2SO3(g) + 392 kJ Explain, in terms of collision theory, why increasing the pressure of the gases in the cylinder increases the rate of the forward reaction. Determine the amount of heat released by the production of 1.0 mole of SO3(g). State, in terms of the concentration of SO3(g) , what occurs when more O2(g) is added to the reaction at equilibrium.

Which is the correct name for the comound N2O3