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Nonamiya [84]
3 years ago
9

Write the number 874.591 correct to 2 decimal places​

Chemistry
2 answers:
svetlana [45]3 years ago
4 0
Your answer is 874.59

the .591 rounds down because 1 rounds down

hope this helps:)
alisha [4.7K]3 years ago
3 0

Answer:

874.59

Explanation:

The number after 9 is 1

1 is lower than 5 so we leave the previous number the same

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a hydrate of cocl2 with a mass of 6.00 g is heated strongly. after cooling the mass of the a hydrate is 3.27g. how many grams of
nlexa [21]
The term hydrate would mean that the compound contains water molecules. When this compound is heated, the water molecules are lost first which means that what remains would be the dried compound. Therefore, the H2O lost from the hydrate would be 6.00g - 3.27g = 2.73 g.
6 0
4 years ago
Calculate the number of moles of Cu in 3.8×10213.8×1021 atoms of Cu.
rosijanka [135]

Answer:

6.3×10⁻³ moles of Cu

Explanation:

The relation is, that 1 mol of particles are contained by 6.02×10²³ particles.

This is Avogadro's number that explains that: one mole determines the number of fundamental units that are contained in a constant number  but they do not depend on the type of material or the type of particle, and this quantity is 6.02 × 10²³

We can make a rule of three:

6.02×10²³ atoms are contained 1 in mol of Cu

Therefore, 3.8×10²¹ atoms will be contained in (3.8×10²¹ . 1) / NA = 6.3×10⁻³ moles

7 0
4 years ago
Forms of a given element that have a different number of neutrons are called cosmic rays. True False
Semenov [28]

Answer:

False

Explanation:

Forms of a given element that have a different number of neutrons are called isotopes.

5 0
2 years ago
Hydrogen peroxide rapidly decomposes to water and oxygen. If the water is appearing at a rate of 2.0 M/s, what is the rate of th
balu736 [363]

Answer:

Rate of reaction = 2.0 M/s

Explanation:

2H2O2(g) --> 2H2O(g) + O2(g)

Rate of formation of H2O = 2.0 M/s

Rate of reaction can be measured using multiple techiques and parameters like volume, pressure etc.

Among these techniques is the measurement of appearance of products.

This means we have;

Rate of reaction = Rate of appearance of product

Hence;

Rate of reaction = 2.0 M/s

4 0
4 years ago
Which of the following statements are correct? Rewrite the incorrect statements to correct them.
Mariana [72]
A) true
b) false  The atomic mass is never less than the atomic number.
c) this one is a bit tricky.  For hydrogen, the atomic mass can equal the atomic number IF you are rounding the mass to the nearest whole number. That only works for hydrogen, though
d) false  The larger the element, the more neutrons that are needed to keep the nucleus stable.
e) true
f) true
7 0
3 years ago
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