An aqueous solution has a hydroxide-ion concentration of 1.0 x 10-3M. What is the pH of the solution? a 7
b -3
c 11
d 3

Answers

Answer 1

Answer: 11 with pemdas, you have to multiply all by 3

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A beaker contains three solids: flour, sugar, and baking soda. Whichdescribes the contents of the beaker? *

Answers

Answer: It is a Heterogeneous mixture.

Final answer:

The beaker contains a mixture of three solids, namely flour, sugar, and baking soda. These components retain their properties in the mixture and are not chemically combined.

Explanation:

The contents of the beaker can be described as a mixture. A mixture is a combination of two or more substances that are not chemically combined. In this case, the beaker contains flour, sugar, and baking soda. These are solid substances that maintain their own properties in the mixture. They're simply combined in the same space (the beaker), but they are not interacting on a molecular level to form a new substance.

Learn more about mixtures here:

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To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 4.4-L bulb, then filled it with the gas at 1.00 atm and 22.0 ∘C and weighed it again. The difference in mass was 5.1 g . Identify the gas.

Answers

Answer : The diatomic gas is nitrogen gas, N₂.

Explanation :

First we have to calculate the moles of gas.

Using ideal gas equation:

$PV=nRT$

where,

P = Pressure of gas = 1.00 atm

V = Volume of gas = 4.4 L

n = number of moles of gas = ?

R = Gas constant = $0.0821L.atm/mol.K$

T = Temperature of gas = $22.0^oC=273+22.0=295.0K$

Putting values in above equation, we get:

$1.00atm* 4.4L=n* (0.0821L.atm/mol.K)* 295.0K$

$n=0.1817mol$

Now we have to calculate the molar mass of gas.

$\text{Molar mass of gas}=\frac{\text{Given mass of gas}}{\text{Moles of gas}}$

$\text{Molar mass of gas}=(5.1g)/(0.1817mol)=28.07g/mol$

As we are given that the gas is diatomic X₂.

As, 2 atoms of gas X has mass = 28.07 g/mol

So, 1 atom of gas will have mass = $(28.07)/(2)=14.04g/mol$

From this we conclude that the nitrogen atom has mass of 14.04 g/mol.

Thus, the diatomic gas is nitrogen gas, N₂.

Please help ASAP ty :)

Answers

Answer:

c or d it measures smallest to biggest and biggest to smallest

Answer:

your answer is a

Explanation:

Count the total number of atoms in sio2:

Answers

Atoms are the basic units of matter and the defining structure of elements. We count the number of atoms by the total number of elements present in the compound. In this case, we have 1 atom of Si and 2 atoms of oxygen which would have 3 total number of atoms.

Besides water, what is the product of a Neutalization Reaction between HClO3 and Sr(OH)2?a. SrClO3
b. Sr-1(ClO3)+2
c. Sr2CIO3
d. Sr(ClO3)2

Answers

Answer:

The answer to your question is letter d. Sr(ClO₃)₂

Explanation:

Data

Reactants HClO₃ and Sr(OH)₂

This is a neutralization reaction because the reactants are a base (Sr(OH)₂) and an acid (HClO₃).

The products in a neutralization reaction are always water and a salt.

Balanced chemical reaction

Sr(OH)₂ + HClO₃ ⇒ H₂O + Sr(ClO₃)₂

A chemist mixes two liquids together. The reaction produces a gas and a solid. According to the law of conservation of mass, what should the chemist observe when she compares the total masses of the substances before and after the reaction? A.The masses are equal. B.The masses are inconsistent. C.The mass of the substances before the reaction is greater than the mass of the substances after the reaction. D.The mass of the substances before the reaction is less than the mass of the substances after the reaction.

Answers

A is the answer. Because the masses are equal.

The answer is (A.) The masses are equal. (The law of conservation of mass says that mass cannot be created (added) or destroyed. So the total mass must be the same before and after. Hopefully, this helps)

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