3 years ago

A light-year is a way to measure ______ in space.

Chemistry

2 answers:

kirill115 [55]3 years ago

4 0

Answer:

Distance

Explanation:

The light-year is a measure of distance, not time. It is the total distance that a beam of light, moving in a straight line, travels in one year.

mario62 [17]3 years ago

3 0

Answer:

distance pooh <3

Explanation:

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in heating a kettle of water on an electric stove, 3.34×10^3 J of thermal energy was provided by the element of the stove. yet,

insens350 [35]

Answer:

The percentage efficiency of the electrical element is approximately 82.186%

Explanation:

The given parameters are;

The thermal energy provided by the stove element, $H_{supplied}$ = 3.34 × 10³ J

The amount thermal energy gained by the kettle, $H_{absorbed}$ = 5.95 × 10² J

The percentage efficiency of the electrical element in heating the kettle of water, η%, is given as follows;

$\eta \% = \dfrac{H_{supplied} - H_{absorbed} }{H_{supplied}} \times 100$

Therefore, we get;

$\eta \% = \dfrac{3.34 \times 10^3 - 5.95 \times 10^2}{3.34 \times 10^3} \times 100 = \dfrac{549}{668} \times 100 \approx 82.186 \%$

The percentage efficiency of the electrical element, η% ≈ 82.186%.

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3 years ago

The molar mass of I2 is 253.80 g/mol, and the molar mass of NI3 is 394.71 g/mol. How many moles of I2 will form 3.58 g of NI3?

Nat2105 [25]

To answer the problem above first we need to find the difference of molar mass of NI3 from I2, 394.71 g/mol - 253.80 g/mol = 140.91 g/mol. Knowing the molar mass of the difference of NI3 from I2, in equation mass (g) / moles (mol) = molar mass, then we substitute. 3.58g / moles = 140.91 g/mol.
moles = 3.58 / 140.91 = 0.025 moles.

6 0

4 years ago

Which term names enzymes in the body that speed up chemical reactions? A. catalysts B. cells C. concentrations D. chloroplasts

vazorg [7]

Carbonic anhydrase speeds up the transfer of carbon dioxide from cells to the blood.

Hope this work cuz

8 0

3 years ago

Read 2 more answers

What is the volume of 120 mg of water? A. 1.2 dL B. 120 mL C. 120 L D. 1.2 L

mojhsa [17]

I would say B but I am not sure so sorry if it is wrong!!

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