Which compound forms a saturated solution at 40 degrees C that contains 46 grams per 100 grams of water?

Answers

Answer 1

Answer: The correct answer for the question that is being presented above is this one: "NH4Cl." The compound that forms a saturated solution at 40 degrees C that contains 46 grams per 100 grams of water is the NH4Cl. Ammonium chloride is an inorganic compound with a white crystalline salt that is highly soluble in water.

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What is the balanced equation of Ca3(PO4)2+ SiO+ C---> P+ CaSiO+ CO

Answers

Balanced chemical equation:

1 Ca3(PO4)2 + 3 SiO2 + 11 C = 2 P + 3 CaSiO + 11 CO

hope this helps!.

How does marijuana effect the brain

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If you’ve ever smoked a joint or eaten a pot-laced brownie, you’re hardly alone: More than 1 in 3 people in America have tried marijuanaat one point in their lives.

Though occasional use isn’t usually harmful, pot can affect your body and mind any time it gets into your system. Here’s what you need to know.

Physical Effects

Marijuana comes from the hemp plant Cannabis sativa. It has an active ingredient called THC that makes you feel high. THC and other compounds in marijuana can also affect the way your body works.

What are the three elements found in a molecule of calcium carbonate? Give their atomic numbers and chemical symbols. How many atoms of each are found in one molecule of calcium carbonate?

Answers

Calcium carbonate is CaCO3.
So there is calcium, symbol is Ca and an atomic number of 20.
Carbon: symbol is C and an atomic number of 6.
Oxygen: symbol is O and an atomic number of 8.
In one molecule of CaCO3, there is one atom of Ca, one atom of C, and three atoms of O as shown by the subscript next to O in the formula. There are no other subscripts to indicate more than one atom of the other elements, so there is only one atom of the other two elements

What is produced as a lead-acid battery is discharged?a. Acid
c. Electrolytes
b. Lead sulfate
d. Zinc oxide

Answers

Lead sulfate is produced as a lead acid battery is discharged. Hope this helped!

Answer:

Explanation:

Under which conditions of temperature and pressure would helium behave most like an ideal gas?(1) 50 K and 20 kPa (3) 750 K and 20 kPa
(2) 50 K and 600 kPa (4) 750 K and 600 kPa

Answers

Answer : The correct option is, (3) 750 K and 20 kPa

Explanation :

The conditions for ideal gas are :

Ideal gas are those gas that has no intermolecular attractions.

Ideal gas are those gas that have negligible volume.

The ideal gas equation is,

$PV=nRT$

The conditions for real gas are :

Real gas are those gas that have intermolecular attractions.

Real gas are those gas that have volume.

The real gas equation is,

$(P+(an^2)/(V^2))(V-nb)=nRT$

A real gas behave ideally at high temperature and low pressure condition.

From the given options, option (3) have high temperature and low pressure is the correct option.

Hence, at 750 K and 20 kPa conditions of temperature and pressure does a sample of helium behave most like an ideal gas.

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 pair
pKa + pKb = 14.00
b. What is pKb of the conjugate base of X-281? (Assume 25 ∘C.) Express your answer numerically.