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8090 [49]
3 years ago
12

Which of the following is a compound? a.carbon b.oxygen c.hydrogen d.water

Chemistry
1 answer:
Papessa [141]3 years ago
8 0
It’s a.carbon according to Siri
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3. Sarah, who has a mass of 55 kg, is riding in a car at 20 m/s. She sees a cat crossing the street and slams on the brakes! Her
kirza4 [7]

F = (mass)(acceleration) = ma

m = 55 kg

Vi = 20 m/s

t = 0.5 s

Vf = 0 m/s (since she was put to rest)

a=(Vf-Vi)/t

a=(0-20)/5

a = 40 m/s^2 (decelerating)

F = ma = (55 kg)(40 m/s^2)

F = 2200 N

7 0
3 years ago
Explain how a scanning electron microscope (SEM) can be used in combination with an energy dispersive X-ray spectrometer (EDS) t
vfiekz [6]

Answer:

SEM provides detailed high resolution images of the sample by rastering a focussed electron beam across the surface and detecting secondary or backscattered electron signal. An Energy Dispersive X-Ray Analyzer (EDX or EDA) is also used to provide elemental identification and quantitative compositional information.

6 0
3 years ago
What is Electrolysis method?​
timofeeve [1]

Answer:

Process by which electric current is passed through a substance to effect a chemical change.

Explanation:

Hope this helps and have a blessed day.

7 0
2 years ago
I really need your help
PilotLPTM [1.2K]

Answer:

Terrestrial

                   -20 to 30 degrees celsius average

                        (20 – 35 inches) of rain per year.

                     PLANTS: Grasses dominate temperate grasslands. Trees and large shrubs are rarely found in grassland areas

                gazelles, zebras, rhinoceroses, wild horses, lions, wolves, prairie dogs, jack rabbits, deer, mice, coyotes, foxes, skunks, badgers, blackbirds, grouses, meadowlarks, quails, sparrows, hawks, owls, snakes, grasshoppers, leafhoppers, and spiders.

            Grasslands are also known as prairies, pampas, steppes, and savannas.

Explanation:

6 0
2 years ago
In a chemical reaction 18 grams of hydrochloride acid reacts with 20 grams of sodium hydroxine to produce sodium chlorine and wa
masya89 [10]

Answer:

The mass of water formed is 38 grams

Explanation:

6 0
2 years ago
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