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2 years ago

Please help! First correct answer will be awarded brainliest.

Chemistry

1 answer:

marissa [1.9K]2 years ago

6 0

Answer: g

Explanation:

0.92g/mL • 237mL/1cup - the mL cancel out leaving just grams

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SHOW YOUR WORK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

WARRIOR [948]

Answer:

1.375%

Explanation:

Percent Error = measured value - accepted value/ accepted value x 100

Measured Value: 15.78

Accepted Value: 16.00

Work:

$\frac{15.78-16.00}{16.00}$ * 100

$\frac{-.22}{16}$ * 100 = -1.375

You cannot have a negative percentage. Therefore the answer is 1.375%

4 0

2 years ago

Which of the following gases would have the greatest kinetic energy at 300 K?

tekilochka [14]

Answer:

D. All of them would have the same kinetic energy

Explanation:

The expression for the kinetic energy of the gas is:-

$K.E.=\frac{3}{2}\times K\times T$

k is Boltzmann's constant = $1.38\times 10^{-23}\ J/K$

T is the temperature

Since, kinetic energy depends only on the temperature. Thus, at same temperature, at 300 K, all the gases which are $N_2,\ NH_3\ and\ Ar$ will posses same value of kinetic energy.

4 0

2 years ago

) If I have 223.4 grams of iron, how many moles of iron do I have?

Natalija [7]

Answer:

Number of moles of iron are 4 mol.

Explanation:

Given data:

Mass of iron = 223.4 g

Number of moles = ?

Solution:

Molar mass of iron = 55.85 g/mol

Formula:

Number of moles = mass/molar mass

Number of moles = 223.4 g/ 55.85 g/mol

Number of moles = 4 mol

3 0

3 years ago

Please I need help with questions 16-21 and it’s very hard and I’m struggling with it and if you need to see the picture big the

Oliga [24]

16) 2 servings (4percent Times 2 is 8percent)
17) D; it’s the only choice that can’t be backed up by just looking at the chart
18) A cell wall
19) either A or D but I’m pretty sure it’s D because they help the soil
20) D metabolism
21)c chromosomes because eggs and sperm have 23 chromosomes

5 0

2 years ago

For a gas to become a liquid it’s particles must A. Speed up B. Slow down C. Stop

madam [21]

Slow down because liquids have less movement than gases

3 0

2 years ago