How many grams are there in 3.5 moles of H20

Answers

Answer 1

Answer: Molar mass H₂O = 18.0 g/mol

1 mol ----- 18.0 g
3.5 moles --- ?

Mass ( H₂O) = 3.5 x 18.0 / 1

=> 63.0 g

hope this helps!

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All the examples stated belos is an example of electric forces except _________. A)a neutron pushing on another neutron B)an electron pushing on a proton B)an electron pushing on another electron
A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid, but because of security concerns, the actual chemical formula must remain top secret. The company is interested in the drug's Ka value because only the dissociated form of the chemical is active in preventing cholesterol buildup in arteries.To find the pKa of X-281, you prepare a 0.089 M test solution of X-281 at 25.0 ∘C. The pH of the solution is determined to be 2.40. a. What is the pKa of X-281? Express your answer numerically.At 25∘C, for any conjugate acid-base pairpKa + pKb = 14.00b. What is pKb of the conjugate base of X-281? (Assume 25 ∘C.) Express your answer numerically.
Where is copper in the periodic table?
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Which substance is an Arrhenius acid

Answers

Explanation:

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Let's solve this!

An Arrhenius acid is a substance that, when dissolved, forms stainless hydrogen (H +)

An Arrhenius base is a substance that when dissolved produces oxhydryl ions (OH-).

For example:

hydrochloric acid: HCl

Nitric Acid: HNO3

Final answer:

An Arrhenius acid is a substance that releases hydrogen ions when dissolved in water. Examples can range from strong acids, like hydrochloric acid, to weak acids like vinegar. The concept was formulated by Svante Arrhenius, underlining the importance of hydrogen in the definition of acids.

Explanation:

An Arrhenius acid is specifically defined as a substance which, when dissolved in water, releases hydrogen ions (or protons). This includes strong acids like hydrochloric acid (HCl), which releases all of their hydrogen ions in solution, thereby becoming completely ionized. However, this also includes weak acids like vinegar, or acetic acid, which do not ionize completely and still leave some hydrogen ions within the compound.

These properties of acids were formulated by Svante Arrhenius in the late 19th century, underlining the importance of hydrogen in defining acids. The ability of acids to release hydrogen cations led to their definition as acid substances.

Thus, if a substance releases hydrogen ions into a solution when dissolved in water, it can be described as an Arrhenius acid.

Learn more about Arrhenius acid here:

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A metal having a mass of 44 grams is dropped in 118.2 cm3of water and sinks to the bottom. The volume
of the water and object is 124.3 cm3
. What is the density of the metal?

Answers

The volume of the lump that was dropped into the water is

(124.3 - 118.2) = 6.1 cm³

The density of the lump is (mass)/(volume) = 44 / 6.1 = 7.21 gm per cm³.

Which two substances bind using a lock-and-key mechanism?enzyme and substrate
reactant and substrate
substrate and product
reactant and product

Answers

The answer is the first option. Enzyme and substrate bind using a lock-and-key mechanism. Enzymes act on a specific substrate and a substrate needs a specific enzyme, this is what is called a lock-and-key mechanism. Enzymes and substtates are like a key and a lock, one is for each other.

it would be A: enzyme and substrate

Which of the following is least likely to form bonds? helium hydrogen nitrogen oxygen

Answers

Answer: Helium is least likely to form bonds.

Explanation:

Helium has the electronic configuration $1s^(2)$ . As the 1s sub-shell is completely filled so there is no need for helium to form bonds with other atoms.

Whereas, nitrogen has the electronic configuration $1s^(2) 2s^(2) 2p^(3)$ . As the p sub-shell is half filled, it has the tendency to accept more electrons. Therefore, nitrogen is more susceptible to form bonds as compared to helium.

Thus, it is concluded that helium is least likely to form bonds.

Helium as it's a nobel gas and therefore does not need to form any bonds to get a full shell of outer electrons (as its shell is already full) making it stable.

Makea claim about why cells need ribosomes.
Summarize evidence to support the claim
and explain your reasoning.
ls?

Answers

Cells need ribosomes to make protein.

What is the molarity of a solution of 14.0 g NH4Br in enough H20 to make 150 mL of solution?

Answers

Mass of solute = 14,0 g

Molar mass ( NH4Br ) = 14 + 1 . 4 + 80 = 98 g/mol-1

volume of the solution = 150 mL = 0,15 L

Molarity of the solution = mol/L-1

$M = (m)/(mm.V)$

$M = (14,0)/(98.0,15)$

$M = (14,0)/(14,7)$

$M = 0,952 mol/L ^(-1)$

Hope this helps!

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Apparently, the first organic compound synthesized in the lab was sucrose. true or false

Pls help its due in a few minutes