Me ajude pfv:
2)marque a alternativa que contém um ácido e um óxido:
a)h2o e co2
b)h2so4 e no2
c)naoh e hci
d)kci e naoh
e)etanol e glicerina
3)um acido, de acordo com arrthenius, é aquela substância que:
a)quando dissolvida em agua,forma oh-
b)quando dissolvida em álcool, forma h+
c)quando dissolvida em água, forma h+
d)quando dissolvida em clorofórmio,forma h+
e)nenhuma das alternativas
4)para combater a acidez estomacal causada pelo excesso de ácido clorídrico, costuma-se ingerir um antiácido. das substâncias abaixo, encontradas no cotidiano das pessoa, a mais indicada para combater a acidez é:
a)refrigerante
b)suco de laranja
c)água com limão
d)vinagre
e)leite de magnésio
5)sabemos que a escala de ph é formada por números de 1 a 14. valores extremos de ph, muito acima ou muito abaixo de 7,0, costumam ser considerados desfavoráveis para a vida. cite um exemplo de substância com ph ácidos e um exemplo de substância com ph básico.
r:
Solved
Show answers
More tips
- S Society and Politics What Would Brezhnev Do If He Were Alive Today?...
- S Style and Beauty Choosing a Hair Straightener: Specific Criteria to Consider...
- F Family and Home How to Remove Tar Stains: Tips and Recommendations from Experts...
- F Family and Home How to Remove Fading from Clothes: Tips and Tricks...
- S Sport How to Do a Jumping Split...
- H Health and Medicine How Did Inna Lose Weight on Dom 2?...
- F Family and Home How to Properly Fold Napkins in a Napkin Holder?...
- F Food and Cooking How to Set Up Ventrilo - The Ultimate Guide...
- S Science and Technology How to Make a Homemade Smoker: The Ultimate Guide...
- A Auto and Moto Battle for the Relocation of The Cherkizovsky Market: Who Won?...
Answers on questions: Chemistry
- C Chemistry Select the choice that best describes the relationship of the pair of compounds. Both compounds are alkenes. Carbon 1 of both alkenes contain an ethyl and a hydrogen....
- C Chemistry 1. Determine the mass percent concentration of sugar (Xim/nd sugar) for the unknown solution using the information provided above. 2. In your own words, describe the...
- C Chemistry Compare photons of gamma and radio radiation. You are currently in a labeling module. Turn off browse mode or quick nav, Tab to items, Space or Enter to pick up, Tab...
- C Chemistry Gold has a density of 19.3 g/cm³. What is the mass, in kilograms, of one cubic meter of gold? Please show work....
- E English Unit 7, section b of your text book taught you how to ask for give refuse permission. read the example then write appropriate expressions _two each _one for giving...
- M Mathematics For the following system of equations, what is the x-value of the solution? -x + 2y = 6 6y = x + 18...
- S Social Studies Authoritative parents expect obedience without question from their children. select the best answer from the choices provided: t f...
- H History All of the following were criticisms of reconstruction except which one...
- M Mathematics Ineed dead line is approaching look at the attachment for question and answer choices are as followed question 4 options: a relation only a function only both a relation...
- M Mathematics Apie was cut into eight equal slices. if ruben ate 3/4 of the pie, how many slices did he eat...
Ответ:
Molarity = moles / Volume of Solution in L (1)
Also,
Moles = mass / M.mass
Putting value of mole in eq. 1,
Molarity = (mass / M.mass) / Vol
Solving for mass,
Mass = Molarity × M.mass × Vol
Putting Values,
Mass = 0.15 mol/L × 40 g/mol × 0.5 L
Mass = 3 g
Result:
Weight 3 g of NaOH, add it to a 500 ml volumetric flask, and add distilled water to the point of 500 ml. The resulting solution will be 0.15 M.