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Katyanochek1 [597]
3 years ago
10

Help pleaseeeeeeeeee

Chemistry
2 answers:
krek1111 [17]3 years ago
8 0

Answer:

Dubnium: Group 5 Period 7

Hydrogen: Group 1 Period 1

Explanation:

AlladinOne [14]3 years ago
7 0

Answer:

Db period =7

Group=VB

H period=1

group=IA

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What could be done to increase the acceleration of a dog sled? List two possibilities
snow_lady [41]

To increase the acceleration of the dog sled, increase the applied force on the sled and reduce the mass on the sled.

According to Newton's second law of motion, the force applied to an object is directly proportional to product of mass and acceleration of the object.

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a = \frac{F}{m} \\\\

To increase the acceleration of the dog sled:

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Ludmilka [50]
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Not sure how to do this
faust18 [17]

Answer:

0.0991 M

Explanation:

Step 1: Write the neutralization reaction between oxalic acid and sodium hydroxide.

H₂C₂O₄ + 2 NaOH = Na₂C₂O₄ + 2 H₂O

Step 2: Calculate the moles of oxalic acid

The molar mass of H₂C₂O₄ is 90.03 g/mol. The moles corresponding to 153 mg (0.153 g) are:

0.153g \times \frac{1mol}{90.03g} = 1.70 \times 10^{-3} mol

Step 3: Calculate the moles of sodium hydroxide

The molar ratio of H₂C₂O₄ to NaOH is 1:2.

1.70 \times 10^{-3} molH_2C_2O_4  \times \frac{2molNaOH}{1molH_2C_2O_4} = 3.40 \times 10^{-3} molNaOH

Step 4: Calculate the molarity of sodium hydroxide

\frac{3.40 \times 10^{-3} mol}{34.3 \times 10^{-3} L} = 0.0991 M

4 0
4 years ago
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