What is the wavelength of a wave that has a frequency of 4.35x10^5Hz

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The reaction Ba(NO3)2(aq) + Na2SO4(aq) → 2NaNO3(aq) + BaSO4(s) goes to completion because a
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Is tomatoe juice acidic?

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Tomatoes are acidic in the mouth and stomach, yet their Alkaline residue Alkalizes

no it is not an acid is more like lemons

What is the molar mass of a substance

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Molar mass of a molecule is the sum of the atomic mass of the individual elements in the molecule.

Atomic mass of Pb = 207 amu

Atomic mass of N = 14 amu

Atomic mass of O = 16 amu

Here amu stands for atomic mass unit

Molar mass of Pb(NO₃)₂ = 207 + [14 + (16 x 3)] x 2

= 207 + 28 + (48) x 2 = 331 g/mol

The mass of an element in the periodic table

Democritus was a Greek philosopher living from c. 460 B.C. to c. 370 B.C. He wrote several suppositions on the properties of matter.Which of the following statements most closely describes Democritus's ideas about matter?

A. All matter is composed of tiny particles that can vary in shape, size, and weight.

B. Solid matter is composed of square-shaped particles and liquid matter is composed of flat particles.

C. Solid matter is composed of atoms and liquid matter is composed of elements.

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The correct answer is answer choice A, all matter is composed of tiny particles that can vary in shape, size, and weight. Democritus believed that the universe is made up of empty space and tiny particles; these particles were atoms.

Hope this helps!

The addition of a catalyst in a chemical reaction (A) increases the concentration of products at equilibrium.
(B) increases the fraction of reactant molecules with a given kinetic energy.
(C) provides an alternate path with a different activation energy.
(D) lowers the enthalpy change in the overall reaction

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the addition of catalyst in a chemical reaction has 2 functions
1. if you add negative catalyst then the rate of chemical reaction decreases
2. if you add positive catalyst then the rate of chemical reaction increases.

When do elements absorb energy and enter an excited state?

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When they change into a gas from a liquid or solid.

Classify the following as fluids or solids: warm butter, liquid nitrogen, paper, neon gas, ice.

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warm butter- liquid
Liquid nitrogen- gas
paper- solid
neon gas- gas
ice- solid

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Identify whether the following is an example of qualitative or quantitative data. the taste of an apple:

A material will float on the surface of a liquid if the material has a density less than that of the liquid. Given that the density of water is approximately 1.0 g/mL, will a block of material having a volume of 1.2 x 10^4 in^3 and weighing 350 lb float or sink when placed in a reservoir of water? [I just don't want the answer, I'd like to know how to solve this, please.]

The formation of rust is represented by the following reaction: 4Fe + 3O2 → 2Fe2O3 + energyIs this reaction exothermic or endothermic? How do you know?

Which one of the following equations is not balanced?6H2O + 6CO2 ---> C6H12O6 + 6O2C7H16 + 11O2 ---> 7CO2 + 8H2OPCl2 + 4H2O --->H3PO4 + 5HCLFe3O4 + 4H2 ---> 3Fe + 4H2O