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vagabundo [1.1K]
3 years ago
15

Please help me out ........

Chemistry
1 answer:
goldfiish [28.3K]3 years ago
8 0

Answer:c

Explanation:

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What is the mass of 4.70 mol H2O? Answer in units of g.
Blizzard [7]

Answer:

4.70 moles of water have mass of 84.6g

Explanation:

Given data:

Number of moles of water = 4.70 mol

Mass in gram = ?

Solution:

Formula:

Mass = number of moles × molar mass

Molar mass of water is 18 g/mol

Mass = 4.70 mol × 18 g/mol

Mass = 84.6 g

Thus, 4.70 moles of water have mass of 84.6g.

8 0
3 years ago
A car can accelerate from a standstill to 100 km/h [E] in 9.60s. calculate the average acceleration
Lelu [443]

Answer:

Acceleration is :

a = 2.89 m/s2

Explanation:

Acceleration : It is the change in the velocity of the object per unit time.

The object starts from the rest , so the initial velocity of the object is zero.

Initial velocity , u = 0

Final velocity = 100 km/h

Change the velocity to m/s because[ time unit is in second(9.60 s)]

1 km = 1000 m

1 hour = 60 x 60 sec = 3600 sec

1km/h=\frac{1000}{3600}m/s

1km/hr=\frac{5}{18}

100km/hr=\frac{5}{18}\times 100

v=\frac{5}{18}\times 100

v = 27.78 m/s

u = 0 m/s

time = 9.60 s

The acceleration"a" is calculated using :

a=\frac{v-u}{t}

a=\frac{27.78-0}{9.6}

a=\frac{27.78}{9.6}

a=2.89m/s^{2}

5 0
3 years ago
PLEASE HELP What is the mass of sodium in 50 grams of salt? Show your work.
Inessa05 [86]

50 grams salt

Volume of 50 Grams of Salt

50 Grams of Salt =

2.78 Tablespoons

8.33 Teaspoons

0.17 U.S. Cups

0.14 Imperial Cups

4 0
4 years ago
Read 2 more answers
The volume of a container is 40 cm3. It has a length of 4 cm, a width of 2 cm. What is the height of the container?
PtichkaEL [24]
5cm
4x2 =8, 8x5 =40
so 4 x 2 x 5 = 40cm3
7 0
3 years ago
Read 2 more answers
When 20 calories of heat is added to 2.0 grams of water at 15 c, the temperature of the water increases to?
Hoochie [10]
20 calories equals to 8.368 joules.
4.184 J is needed to raise 1 gram of water.(Heat capacity of water)
for 2 grams of water 8.368 joules.

So the answer is 16 c.
8 0
3 years ago
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