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vredina [299]
3 years ago
9

Which of the following statements is true?

Chemistry
2 answers:
hammer [34]3 years ago
8 0

Lord dragon you are wrong.

The answer is A: Incandescent light bulbs are almost 100 percent efficient. Because b-d do not make any sense.

artcher [175]3 years ago
8 0

Answer:

a

Explanation:

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How many grams of CO2 are in 2.1 mol of the compound?
lawyer [7]
The molar mass of a substance is the mass of one mole of that substance. Therefore, in order to calculate the mass that is present while the number of moles are known, we simply multiply the number of moles present by the molar mass. In the case of carbon dioxide, the molar mass is obtained by adding the mass of one carbon atom (12) and two oxygen atoms (32). The molar mass is 12 + 32 = 44. Therefore, the mass of carbon dioxide is 2.1 * 44 = 92.4 grams. The answer is D<span>.</span>
3 0
3 years ago
Read 2 more answers
Please help, I’ll mark your answer as brainliest
Sedaia [141]

Answer:

5.16 gm of SO3 formed with 2 g of S

Explanation:

Mole weight of  S in the equation = 2 * 32 = 62 gm

Mole weight os   O2  in the equation  6 * 16 =96 gm

From the BALANCED  equation   the grams of   S  to   O2  is

    62   to 96   so    2 g of  S will need  approx 3 gm of O2

            this shows that S is the limiting reactant------>

                            there will be O left over  (approx 1 gram)

SO3 mole weight produced from the equation is   2 (32)(3*16) = 160 gm

  62 gm of S produces 160 gm of SO3

   62/160 =  2 / x       x = 5.16 gm of  SO3   are formed

3 0
2 years ago
Draw the products of the acid-base reaction between stearic acid and OH-
jok3333 [9.3K]

Answer:

Products are stearate anion and water.

Explanation:

Stearic acid is a 18-carbon chain molecule containing -COOH group. IUPAC name of stearic acid is octadecanoic acid.

Molecular formula of stearic acid is C_{17}H_{35}CO_{2}H.

When OH^{-} is added into stearic acid, OH^{-} removes a proton (H^{+}) from acidic -COOH group and forms stearate anion and water as products.

The balanced acid-base reaction is given as:

                  C_{17}H_{35}CO_{2}H+OH^{-}\rightleftharpoons C_{17}H_{35}CO_{2}^{-}+H_{2}O

Structure of products are given below.

7 0
3 years ago
usando el concepto de valencia para los elementos S, P Y Br predice las formulas de los compuestos mas simples formados por esto
hram777 [196]

Explanation:

Teniendo en cuenta los numeros de oxidacion negativos de cada uno

P:fosforo(-3)

S:Azufre (-2)

Br:Bromo (-1)

Y el H: hidrogeno con una valencia

positiva de +1

los compuesto que se formaran son los siguientes

1 H3P= fosfuro de hidrogeno

2 H2S= sulfuro de hidrogeno

3 HBr= Acido bromhidrico

ESPERO ABERTE AYUDADO ;D

6 0
2 years ago
What is an atomic number
rusak2 [61]
An atomic number is the number of protons that the atom of a particular element has. 

For example, take carbon. Carbon has 6 protons. It's atomic number is 6.
5 0
3 years ago
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